This class includes (1) processes and apparatus peculiar to removing heat from a substance, usually by a change of phase of a coolant or refrigerant, as by evaporation, melting or sublimation, (2) the resultant product of part (1), e.g.,
ice, liquefied or solidified gases, and (3) processes and apparatus peculiar to handling the latter as a stored product, not elsewhere provided for.

REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:
23, Chemistry: Physical Processes, 295 for processes crystallizing inorganic compounds or non-metal elements not including a refrigeration step, and when there is an intent to make a single-crystal, see Class 117 whether or not including a refrigeration step.
34, Drying and Gas or Vapor Contact With Solids, for processes and apparatus for drying by operations other than refrigeration, combined with cooling by refrigeration, particularly 62, 284+, 302+, and 391+ and also for processes and apparatus for cooling only by gas or vapor contact involving no characteristics of refrigeration; see particularly subclasses 428+ and the Notes thereunder.
52, Static Structures (e.g., Buildings), appropriate subclasses for the structure, per se, of an enclosure which may be defined as forming a refrigerated space, particularly 380, 404.1+ and 479+.
95, Gas Separation: Processes, for processes involving steps resulting in separation of a gas from a fluid mixture comprising (i) a gas and solid or liquid particles entrained therein, (ii) a liquid and gas entrained therein, or (iii) a plurality of gases wherein the steps are of a physical or material handling nature, involve contacting of materials, or exchange properties through electrical or nonreactive chemical treatment. Class 95 takes gas separation of the type noted above including cooling of the sorbent or cooling of the fluid mixture, but not including evaporative cooling after sorption of the type noted in (c) below. Class 95 takes the cold wall-hot wall thermal diffusion type of separation, regardless of any refrigeration claimed. Class 95 also takes expansion through an orifice of a liquid and gas entrained therein where the gas is evolved through the lowering of the pressure and the cooling effect which inherently results from such pressure reduction is not transferred through a wall to another material. If such heat transfer occurs, classification in Class 62 is proper. Class 62 takes (a) eparation of a constituent from a plurality of gases by a significantly claimed refrigeration step or apparatus; (b) condensation of moisture from the atmosphere as a result of a refrigeration operation; (c) gas drying by sorption followed by contacting the dried gas with a liquid to produce cooling by evaporation; (d) a refrigerated enclosure combined with sorption means; (e) refrigeration producing processes and apparatus combined with steps or means for drying the refrigerant; and (f) extracting a constituent from a plurality of gases by liquefaction and separation (e.g., fractionation or distillation, etc.).
96, Gas Separation: Apparatus, for gas separation apparatus corresponding to the processes of Class 95. The line for apparatus between Class 96 and Class 62 is the same as the line above for processes between Class 95 and Class 62.
99, Foods and Beverages: Apparatus, subclass 455, 470 and 517 for apparatus including cooling means.
100, Presses, 92 for a press with means to cool the material compacted by the press, especially subclasses 310, 312, and 314 for a conveyor-type press having means to cool the article or press.
109, Safes, Bank Protection, or a Related Device, subclass 63.5 for a closure with means to render the closure lock ineffective, e.g., a refrigerator with safety features to prevent persons from being locked therein.
117, Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor, for processes and non-coating apparatus for growing therein-defined single-crystal of all types of materials, including inorganic or organic, including those having refrigeration steps or means.
126, Stoves and Furnaces, subclass 273.5 for a domestic oven using a heat accumulator (e.g., fireless cooker, etc.) or subclass 375.1 for an open-top liquid heating vessel that may include a lid having a heat accumulator.
137, Fluid Handling, appropriate subclass for processes and apparatus for fluid handling of general utility.
138, Pipes and Tubular Conduits, subclasses 100-178, especially subclass 149 for insulation on pipe.
165, Heat Exchange, particularly 58 for apparatus adapted for interchangeably, convertibly or alternately heating and cooling. See the reference to Class 62 in the definition of subclass 58 of Class 165.
166, Wells, subclass 57 for well apparatus including refrigeration means, subclasses 265+ for well processes in which fluid may be separated by refrigeration, and subclass 302 for well processes including cooling.
201, Distillation: Processes, Thermolytic, appropriate subclass for a process of thermolytic distillation of a solid carbonaceous material.
202, Distillation: Apparatus, appropriate subclass, for apparatus for distillation of general utility.
203, Distillation: Processes, Separatory, appropriate subclass for a process of separatory distillation of general utility and see Class 203 class definitions for the line
between separatory distillation and this class.
210, Liquid Purification or Separation, appropriate subclass for processes and apparatus which may involve cooling. The following subclasses are particularly noted: subclass 773 for processes involving conversion of solids to liquids before separation, subclass 774 for processes involving heating or cooling and separation, subclass 149 for separating apparatus having means responsive to a thermal condition, and subclasses 175+ for a separator with a heater or heat exchanger.
215, Bottles and Jars, appropriate subclass for a bottle or jar of general utility.
217, Wooden Receptacles, appropriate subclass for a crate or shipping vessel of general utility.
220, Receptacles, appropriate subclass for a tank or receptacle having compartments made mostly of metal, or a tank or container having a mere jacket in which a cooling or heating fluid may be admitted when there is no directing means for circulating the fluid in the jacket.
221, Article Dispensing, appropriate subclass for mechanism having a specific article dispensing feature in combination with a feature too general for classification in Class 62.
222, Dispensing, appropriate subclass for a receptacle having a specific dispensing feature with a feature too general for classification in Class 62.
236, Automatic Temperature and Humidity Regulation, appropriate subclass for a control of general utility. A refrigerant controlling or expansion valve is of general utility unless features resulting in refrigeration production are included.
237, Heating Systems, appropriate subclass for a heating system which may use the heat rejecting portion of a refrigeration system with additional heating means.
241, Solid Material Comminution or Disintegration, appropriate subclass for processes and apparatus for comminuting solid refrigerants and also comminuting processes and apparatus provided with cooling means. See section 6 of the class definition of that class (241) for the line.
249, Static Molds, 69 for ice cube trays including means to release ice cubes from a tray, and subclasses 129+ for ice cube trays, per se, for forming plural cubes.
252, Compositions, particularly 67 for (1) admixtures of ingredients, or an old compound limited to use as a refrigerant, (2) processes of refrigeration comprising any known cycle and distinguished solely by the composition or compound therein, when apparatus structure is not included.
The preceding are placed in Class 252 even though the freezing or boiling point or temperature of use is specific.
260, Chemistry of Carbon Compounds, including the related classes for processes of treating or modifying non-hydrocarbon organic compounds: by crystallization wherein the crystallization is not brought about by refrigeration; wherein crystallization, by any means including refrigeration, is combined with synthesis or modification of said compounds by chemical means; or wherein the separation of carbon compounds is accomplished exclusively by physical means other than refrigeration.
261, Gas and Liquid Contact Apparatus, appropriate subclass, for a gas and liquid contact device having no means specialized to cooling a material out of contact with the contacting fluids.
264, Plastic and Nonmetallic Article Shaping or Treating: Processes, for molding processes, per se, for materials within the class definition, noting particularly subclass 28 for processes including freezing or cooling to a temperature of zero deg.C.
299, Mining or In Situ Disintegration of Hard Material, appropriate subclass for a process or apparatus for recovering or working naturally occurring ice in situ and particularly 24 for an ice working machine or cutter.
312, Supports: Cabinet Structure, particularly subclass 31, 31.01, 36, 116, 213, 236, 253, and 400+ of that class (312) and see the Notes thereto, for cabinet structure including an insulated wall cabinet of general utility.
366, Agitating, appropriate subclasses for agitating process or apparatus of general utility; also, for agitating apparatus involving a cooling means where that means is only a container or a container with means for effecting agitation therein, and in either case there is no modification of either the container or the agitating means restricting the use of the apparatus to refrigeration.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, 1 for processes of preserving by operations other than refrigeration not provided for elsewhere; subclasses 245.1+ for non-coating crystallization apparatus not including chemical reaction means, not including refrigeration means, and not provided for elsewhere; and subclasses 129+ for non-coating crystallization apparatus including means for chemical reaction, which may or may not include refrigeration means, and not provided for elsewhere.
425, Plastic Article or Earthenware Shaping or Treating: Apparatus, appropriate subclasses for molding apparatus, per se, for merely shaping particulate ice (water or carbon dioxide) into a desired configuration; 117 for a specific
refrigeration apparatus and mold means to form a composite product from a fluent material and a preform. Class 62 provides for the combination of plastic material shaping or reshaping apparatus combined with refrigeration apparatus for the material shaped.
426, Food Edible Material: Processes, Compositions, and Products, appropriate subclasses for frozen food products and food working processes combined with freezing.
428, Stock Material or Miscellaneous Articles, appropriate subclasses for a stock material product in the form of a single or plural layer web or sheet, and especially 304.4 for a composite web or sheet including a porous or cellular layer.
454, Ventilation, for means and related processes for ventilation of an enclosure not specialized to refrigeration. The mere inclusion of a cooler for the air or means subjecting the air to air-liquid contact is not considered a means specialized to refrigeration.
585, Chemistry of Hydrocarbon Compounds, for processes including a step of refrigeration which treats or modifies only hydrocarbon compounds (claimed or disclosed). Such processes disclosing any non-Class 585 (i.e., non-hydrocarbon) organic compound are placed according to the class line with Class 260 and related classes. Especially see subclass 15 for treating or modifying a crystalline hydrocarbon hydrate and subclasses 812+ for a purification or separation process for recovery of a hydrocarbon.

This subclass is indented under the class definition. A congealed or frozen article constituting the product produced by processes or apparatus which is intended to be used only once, e.g., a frozen or chilled unit or mixture of ice and liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
371 for a portable commodity container, i.e., a shipping or handling wrapper or container, or a refillable container for refrigerant using a product of refrigeration.
530 for a sealed, flexible, handled or attachable device containing a coolant usable to cool a substance, space or body.

SEE OR SEARCH CLASS:
252, Compositions, 67, 70 and 71+ for a thermal compositions provided for, and see the reference to Class 252 in the class definition of this class (62).
426, Food or Edible Material: Processes, Compositions, and Products, 70 for frozen food products.

USING ELECTRICAL OR MAGNETIC EFFECT:
This subclass is indented under the class definition. Process or apparatus in which cooling is produced by the influence of an electrical current or the field surrounding it upon a conductive or magnetic material.

Thermoelectric; e.g., Peltier effect:
This subclass is indented under subclass 3.1. Process or apparatus in which cooling is produced by either the conversion of heat into electricity or that of electricity into heat; e.g., the Peltier effect.
(1) Note. The following classes and subclasses are noted as involving a thermocouple or a thermoelectric device: Class 136, Batteries: Thermoelectric and Photoelectric, subclasses 203+; Class 236, Automatic Temperature and Humidity Regulation, subclasses 69+; Class 310, Electrical Generator or Motor Structure subclass 306; Class 318, Electricity: Motive Power System, subclass 317; Class 322, Electricity: Single Generator Systems, subclass 2; Class 324, Electricity: Measuring and Testing, subclasses 451 and 452+; Class 361, Electricity: Electrical Systems and Devices, subclasses 161+; and Class 374, Thermal Measuring and Testing, subclasses 179+.

SEE OR SEARCH CLASS:
136, Batteries: Thermoelectric and Photoelectric, 203 for Peltier type batter devices, per se. The battery elements are classified in Class 136 even though they are disclosed as used to produce hot and cold junctions by applying a current to them.

Heat pump, selective heating and cooling:
This subclass is indented under subclass 3.2. Process or apparatus wherein the thermoelectric unit moves thermal energy from one location to another, and can be used alternatively to either heat or cool an object.
(1) Note. The change in function is usually accomplished by reversing the flow of electricity within the unit.

Including dehumidifying and condensate handling:
This subclass is indented under subclass 3.2. Process or apparatus wherein the thermoelectric unit is arranged in a system used to remove ambient humidity as condensate, and which includes means to manipulate the removed condensate.

Made with flexible heat exchanger material; e.g., blanket, wearing apparel, etc.:
This subclass is indented under subclass 3.2. Process of apparatus wherein the thermoelectric unit consists of pliant material (e.g., fabric) and can be used in an article of clothing, a blanket, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:
259.3 for a structurally installed applicator for the effect of refrigeration.
261 for a flexible heat exchanger adapted to be used with a specific article of furniture; e.g., a bed cover or canopy, etc.

Interior of enclosure cooled; e.g., refrigerator:
This subclass is indented under subclass 3.2. Process or apparatus wherein the thermoelectric unit is used to lower the temperature of a confined space.
(1) Note. Room coolers are not included in this subclass.

SEE OR SEARCH CLASS:
165, Heat Exchange, 58 for room coolers.

Having vehicle feature; e.g., cooling cart, car, truck, boat, etc.:
This subclass is indented under subclass 3.6. Process or apparatus wherein the cooled enclosure has some vehicular feature, such as wheels, casters, skids, pontoons, etc., adapting it for transporting people or cargo.

SEE OR SEARCH THIS CLASS, SUBCLASS:
239 for other types of refrigerators with vehicle features.

Portable, having transporting feature; e.g., handle:
This subclass is indented under subclass 3.6. Process or apparatus wherein the cooled enclosure is intended to be transported and includes means by which a person may carry or grip the unit or has means for attaching it to a person or vehicle; e.g., a picnic basket, lunch box, insulin cooler, bottle cooler, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:
457.1 for other types of portable refrigeration apparatus.

Icemaker:
This subclass is indented under subclass 3.6. Process or apparatus wherein the enclosure is specifically adapted for converting water into its solid phase.

SEE OR SEARCH THIS CLASS, SUBCLASS:
340 for other types of icemakers.

Beverage dispenser:
This subclass is indented under subclass .36. Process or apparatus wherein the enclosure is designed to hold a consumable liquid (water, beer, soda, etc.), and means is provided for discharging the liquid from the enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
389 for other types of cooled beverage dispensers.

Including specific circuitry or heat exchanger material:
This subclass is indented under subclass 3.2. Process or apparatus wherein significance is attributed to either electric circuitry associated with the cooling unit or to a material from which the cooling unit is constructed.

This subclass is indented under the class definition. Subject matter in which a refrigeration effect is produced by (1) a chemical reaction or (2) the dissolving of a solid in a liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
76 for processes involving preliminary manufacturing of a refrigerant, e.g., forming a brine, cooling and utilizing it.
330 for apparatus for manufacturing a refrigerant.

SEE OR SEARCH CLASS:
126, Stoves and Furnaces, 263.01 for a chemical reaction heater and see the Notes thereto.
206, Special Receptacle or Package, 219 for a combination package including a rupturable partition.

This subclass is indented under the class definition. Subject matter in which a compressible fluid is caused to flow along a stationary curvilinear path under pressure, producing a refrigeration effect.

This subclass is indented under the class definition. Subject matter in which the refrigeration cycle comprises (1) confining a constant mass of a gas in a chamber whose volume varies from a maximum to a minimum, (2) compressing it, (3) cooling it, and (4) expanding it; the gas remaining as such throughout the cycle; the action of stages (2), and (3) being alternate with heat storage and return (regeneration) between these stages.

SEE OR SEARCH CLASS:
60, Power Plants, 516 for a structurally similar heat operated motor.

This subclass is indented under the class definition. Subject matter in which the refrigerant is used as a refrigeration producer and consumed as a fuel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
45.1 for processes and apparatus for handling stored liquefied or solidified gas, particularly subclasses 48.1+ for vapor dispensing from a liquefied gas dispenser.

STORAGE OF SOLIDIFIED OR LIQUIFIED GAS (E.G., CRYOGEN):
This subclass is indented under the class definition. Process or apparatus for storing a product of refrigeration comprising a substance in solid or liquid phase, which substance boils at or below standard atmospheric temperature when under standard atmospheric pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
7 for liquified or solidified gas used as a fuel.
600 for liquified or solidified gas product manufacturing.

SEE OR SEARCH CLASS:
48, Gas: Heating and Illuminating, appropriate subclass for a process, apparatus, or composition for the manufacture of gas for heating or illumination, and see the notes in the class definition of that class.
137, Fluid Handling, 317 for means to tap a tank under pressure, and subclasses 334+ for heat exchange ancillary to a fluid handling system.
142, Fluent Material Handling, With Receiver or Receiver Coacting Means, subclass 20 for a means of filling an aerosol, and subclasses 311+ for a filling means with a receiver or receiver coacting means, particularly subclass 330 for a puncturing connecting means mounted on a receiver.
169, Fire Extinguishers, 5 for a fluid system in fire extinguishing apparatus using liquified or solidified gas.
206, Special Receptacles and Packages, .6 for a specialized receptacle for storing gas, and see the notes in that class.
220, Receptacles, 560.04 for a receptacle for storing material under cryogenic conditions.
222, Dispensing, appropriate subclass for a liquid dispenser of general utility, particularly 3 for gas dispensing apparatus not limited to liquified gas, and subclasses 173+ for a dispenser with a casing or support.
239, Fluid Sprinkling, Spraying, and Diffusing, 548 and 589+ for spraying nozzles of general utility.

With sorbing or mixing:
This subclass is indented under subclass 45.1. Process or apparatus in which the product of refrigeration is either (a) taken into and held by a sorptive material, (b) acted upon by a solvent, or (c) otherwise mixed with a diverse fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
114 for refrigeration processes including sorption of a liquified gas-type refrigerant.

SEE OR SEARCH CLASS:
48, Gas: Heating and Illuminating, subclass 195 for means for charging heating and illuminating gas with an odorous substance.

Mixing of substance with hydrogen:
This subclass is indented under subclass 46.1. Process or apparatus wherein the product of refrigeration is combined
with hydrogen.
(1) Note. The resulting compound is either a hydride or a hydrate.

SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 402 for processes involving contact of a material with hydrogen under pressure.

Sorbing into capillary material:
This subclass is indented under subclass 46.1. Process or apparatus wherein the product of refrigeration is absorbed into a porous material.

With conservation of cryogen by reduction of vapor to liquid within storage receptacle:
This subclass is indented under subclass 45.1. Process or apparatus wherein vapor pressure within the receptacle is limited by reducing the vapor to its liquid phase while in the receptacle.
(1) Note. The result is that vaporization of the product of refrigeration is minimized.

SEE OR SEARCH THIS CLASS, SUBCLASS:
48.2 for a process or an apparatus wherein vapor is removed from the receptacle and subsequently returned to its liquid phase.

With vapor discharged from storage receptacle:
This subclass is indented under subclass 45.1. Process or apparatus wherein vapor within the receptacle is removed from the receptacle.

SEE OR SEARCH CLASS:
123, Internal Combustion Engines, 434 for a charge forming device related to an internal combustion engine.

And subsequently restored to receptacle as liquid:
This subclass is indented under subclass 48.1. Process or apparatus wherein the removed vapor is condensed and then returned to the receptacle as a liquid.

And subsequently used to cool receptacle:
This subclass is indented under subclass 48.1. Process or apparatus wherein the removed vapor is used to cool either the receptacle's walls or an external component of the receptacle (e.g., a radiation shield, the receptacle's, foundation).

Discharge caused by ignition of combustible gas:
This subclass is indented under subclass 48.1. Process or apparatus wherein combustion of a gas results in vaporization and discharge of stored liquid.

With measuring:
This subclass is indented under subclass 45.1. Process or apparatus wherein a characteristic of the product of refrigeration is measured.

SEE OR SEARCH CLASS:
73, Measuring and Testing, 290 for liquid level testing, subclasses 700+ for fluid pressure testing, and subclasses 861+ for volume or flow rate measuring.
374, Thermal Measuring and Testing, 339 for temperature measuring.

Of liquid level:
This subclass is indented under subclass 49.1. Process or apparatus wherein the height of the stored product within the receptacle is measured.

Liquified gas transferred as liquid:
This subclass is indented under subclass 45.1. Process or apparatus wherein the product of refrigeration is removed from the receptacle as a liquid.

SEE OR SEARCH CLASS:
137, Fluid Handling, 209 for apparatus using gas pressure to discharge a liquid from a fluid system containing diverse fluids, and particularly subclass 210 for such apparatus with means to generate the gas pressure from the liquid.

With vaporizing of liquified gas downstream of storage:
This subclass is indented under subclass 50.1. Process or apparatus wherein the liquid becomes a vapor subsequent to removal from the receptacle.
(1) Note. Potential energy is released when the liquid is converted to vapor.

Energy converted to work (e.g., used to drive prime mover):
This subclass is indented under subclass 50.2. Process or apparatus wherein the potential released by vaporization is transformed into applied power; e.g., used to drive a turbine or motor.

Operates valve which controls flow of liquid:
This subclass is indented under subclass 50.2. Process or apparatus wherein the potential adjusts a valve used to regulate the liquid being removed from the receptacle.

In phase separator:
This subclass is indented under subclass 50.2. Process or apparatus wherein the moved liquid enters a chamber which allows partial vaporization, from which the remaining liquid and the vapor are discharged separately.

Specific pump structure:
This subclass is indented under subclass 50.1. Process or apparatus wherein significance is attributed to a means for generating flow of the liquid; i.e., a pump.

Specific conduit, valve, or coupling structure:
This subclass is indented under subclass 50.1. Process or apparatus wherein significance is attributed to a component adapted to constrain or control flow of the liquid.

Including cryostat:
This subclass is indented under subclass 45.1. Process or apparatus wherein the cryogen is contained by a portable vessel and cools a device contained by the vessel (e.g., an infrared detector).

Joule-Thompson liquefier:
This subclass is indented under subclass 608. Subject matter wherein the liquefaction of helium is effected bypassage from a high pressure to a low pressure through an adjustable orifice and the exiting liquid precools the incoming gas by indirect heat exchange.

Spraying of cryogen:
This subclass is indented under subclass 45.1. Process or apparatus including discharge of the product of refrigeration as a stream of droplets, or means for producing such a stream (e.g., a nozzle).

Underground or underwater storage:
This subclass is indented under subclass 45.1. Process or apparatus wherein the product of refrigeration is stored in a subterranean or subaqueous receptacle (e.g., a tank, a void, etc.) adapted to hold a cryogen.

SEE OR SEARCH CLASS:
405, Hydraulic and Earth Engineering, 53 for underground fluid storage for general applications; and subclasses 195.1+ for underwater fluid storage for general applications.

Storage in modified vehicle (e.g., ship, truck, etc.):
This subclass is indented under subclass 45.1. Process or apparatus wherein the product of refrigeration is stored in a conveyance adapted to carry a cryogen.

Cryogen stored in both phases (e.g., as slush or gel):
This subclass is indented under subclass 45.1. Process or apparatus wherein the product of refrigeration is stored as a mixture of substances having diverse phase characteristics; e.g., a slush, a slurry, a colloidal suspension, etc.
(1) Note. The substances may have the same chemical composition, differing only in phase (e.g., both solid and liquid).

SEE OR SEARCH CLASS:
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, for colloid systems or agents for such systems or making or stabilizing such systems or agents, especially 9 for continuous liquid phase (emulsions, slurries, suspensions), subclasses 98+ for continuous or semicontinuous solid phase (gels, pastes); in each instance, when
generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.

Controlled conversion of solidified gas to another phase:
This subclass is indented under subclass 45.1. Process or apparatus wherein a product of refrigeration in solid phase is transformed at a regulated rate into either a liquid or gaseous phase.

SEE OR SEARCH THIS CLASS, SUBCLASS:
165 for a refrigeration producer having automatic control using solidified gas.
384 for a cooler utilizing solidified gas.

SEE OR SEARCH CLASS:
239, Fluid Sprinkling, Spraying, and Diffusing, subclass 60 for holders for solid matter to be converted to gas by sublimation; e.g., moth balls or crystals.

Storing solidified gas:
This subclass is indented under subclass 45.1. Process or apparatus wherein the product of refrigeration is stored in solid phase.

SEE OR SEARCH THIS CLASS, SUBCLASS:
60 for a refrigeration process including packaging.
371 for a package cooled by solid refrigerant.
529 for a refrigerant or coolant storer or handler.

SEE OR SEARCH CLASS:
53, Package Making, subclass 440 for processes of package making with contents treated by cooling; and subclass 127 for package making apparatus with cooling means.

This subclass is indented under the class definition. Processes and apparatus involving a condensing device which in use operates substantially below 0 deg. C and substantially below atmospheric pressure to condense a material which exists as a gas in the feed line to the condensing device by condensing and retaining the material as a liquid or solid on a heat exchange surface which is kept sufficiently cold by means which is usually a liquefied or solidified gas or mixture thereof to cause the desired condensation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
8 for processes and apparatus for manufacturing a liquefied or solidified gas mercantile product from a normally gaseous material.
272 for refrigeration with means for preventing or handling atmospheric condensate.

SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 73, 284+, 402, and 468, for processes and apparatus for drying which if operated at sufficiently low pressure may use a "cold trap".
96, Gas Separation: Apparatus, for gas separation apparatus provided with heating or cooling means.
137, Fluid Handling, 171 for fluid separating traps or vents in a fluid distribution system of more general application.
165, Heat Exchange, 110 for a heat exchanger of more general application in which a body or stream of fluid of one density is in communication with a fluid of a second density, one of which is condensed.
202, Distillation, 185 for a still and a condenser.

This subclass is indented under the class definition. Processes of refrigeration.

SEE OR SEARCH THIS CLASS, SUBCLASS:
600 for gas liquefying or solidifying processes.

This subclass is indented under subclass 56. Processes wherein particles are suspended by an upwardly directed fluid current.

SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 359 for a gas or vapor contact with solids process with fluid current conveying or suspension of treated materials.
210, Liquid Purification or Separation, subclass 616 and 661 for processes of liquid treatment utilizing a static suspended bed and see (1) Note for other classes having art involving fluidized bed solid and fluid contacting.

This subclass is indented under subclass 56. Processes including making a solid refrigerating medium in situ by a refrigeration cycle, to be used to cool during high refrigeration demand or failure of the cycle.

SEE OR SEARCH THIS CLASS, SUBCLASS:
139 for automatic control of accumulation of ice on a freezing surface.
434 for apparatus using a fluid or an isolated nonliquid holdover.
529 for a refrigerant or coolant storer or handler, e.g., a container for a freezable material.

This subclass is indented under subclass 56. Processes including enclosing a refrigerated material in a closed or closable receptacle to form a completed transportable unit.

SEE OR SEARCH THIS CLASS, SUBCLASS:
371 for a refrigerated portable commodity container.
530 for an envelope type container for a freezable material.

SEE OR SEARCH CLASS:
53, Package Making, particularly subclass 127 for packaging not specialized to refrigeration and see the reference to Class 62 in that subclass (127).
141, Fluent Material Handling, With Receiver or Receiver Coacting Means, subclass 82 for the subject matter of that class combined with cooling not specialized to refrigeration.
426, Food or Edible Material: Processes, Compositions, and Products, subclass 393 for process involving the packaging and freezing food.

This subclass is indented under subclass 56. Processes including utilizing the motion of a carrier to effect the refrigeration process.

SEE OR SEARCH THIS CLASS, SUBCLASS:
133 for automatic control of related apparatus.
241 for related apparatus.

This subclass is indented under subclass 56. Processes in which material to be cooled or refrigerated is an article comprising a physical entity identifiable as such before congelation and having a fixed boundary surface including particulate material, a removable container enclosing a liquid or a living thing.

SEE OR SEARCH THIS CLASS, SUBCLASS:
66 for processes involving treating of a flowable material, e.g., congelation or ice making.

SEE OR SEARCH CLASS:
29, Metal Working, subclass 447 for process of assembly involving prestressing, e.g., chilling a part.
34, Drying and Gas or Vapor Contact With Solids, subclass 428 for processes of cooling an article by gas contact not specialized to refrigeration.
148, Metal Treatment, subclass 125 for processes involving refrigerating metal or metal articles in order to alter the internal characteristics or the properties of the metal.
426, Food or Edible Material: Processes, Compositions, and Products, for processes of refrigerating and treating edible material.

This subclass is indented under subclass 62. Processes wherein the article is moved through a cooling zone or past cooling means while the cooling is effective on the article.

SEE OR SEARCH THIS CLASS, SUBCLASS:
68 for processes involving agitation of a flowable material undergoing congelation.
71 for means removing an initially liquid product from a freezing surface.
378 for related apparatus.

This subclass is indented under subclass 62. Processes in which the cooling is effected by contacting the article with a coolant liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
56 for cooling by contact with a solidified refrigerant even though there be incidental use of the ice melt.
373 for related apparatus.

SEE OR SEARCH CLASS:
134, Cleaning and Liquid Contact With Solids, subclasses 1-42 for processes of contacting an article with a liquid not limited to cooling of the article.

This subclass is indented under subclass 62. Processes wherein a material is sequentially subjected to diverse temperatures.

SEE OR SEARCH THIS CLASS, SUBCLASS:
63 for processes wherein an article is moving during cooling.

This subclass is indented under subclass 56. Processes for congealing material initially in a flowable condition, e.g., ice cream or ice making or condensing fluid to solid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
59 for holdover solid coolant accumulating processes which hold-over is intended for use without removal.
60 for processes involving packaging.
62 for processes of cooling an article which is initially an identifiable fixed entity.
80 for defrosting processes.
151 for automatic control apparatus.
272 for condensate handling.
340 for shaped or modified congealed product producing apparatus.
532 for fractionally solidifying and separating processes.
601 for solidified gas producing processes and apparatus there provided for.

SEE OR SEARCH CLASS:
65, Glass Manufacturing, 454 for processes of manufacturing glass fibers or filaments from molten or flowable material, especially subclass 482 for cooling of molten material at forming area; and subclasses 19+ for processes of otherwise utilizing molten or plastic slag.
264, Plastic and Nonmetallic Article Shaping or Treating: Processes, subclass 5 for methods of forming solid particulate matter directly from a molten or liquid mass, e.g., liquid comminuting.

This subclass is indented under subclass 66. Processes including filtration or gravitational separation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
85 for other processes involving separating of undesirables from a coolant or cooled material.
318 for related apparatus.
532 for fractional crystallization of at least one constituent of a mixture of constituents of different kinds.

SEE OR SEARCH CLASS:
210, Liquid Purification or Separation, 767 for processes and subclasses 175+ for apparatus functioning for a more general purpose.

This subclass is indented under subclass 66. Processes including agitation of a confined body of material during freezing.

SEE OR SEARCH THIS CLASS, SUBCLASS:
74 for processes involving spraying or dripping into a space.
342 for related apparatus.

SEE OR SEARCH CLASS:
366, Agitating, appropriate subclass, for apparatus and related processes of agitation of general utility.

This subclass is indented under subclass 68. Processes wherein air or gas is introduced in a material being frozen.
(1) Note. Processes of freezing and incorporating a gas into the material being frozen is proper for Class 62;
however any additional food working step would cause the patent to be classified in Class 426.

SEE OR SEARCH CLASS:
261, Gas and Liquid Contact Apparatus, 83 for such apparatus utilizing rotating means.

This subclass is indented under subclass 69. Processes wherein the gas is injected into the agitated material.

SEE OR SEARCH THIS CLASS, SUBCLASS:
304 particularly 306, for means feeding gas into a pressurized receiver.
307 for a submerged gas inlet.

This subclass is indented under subclass 66. Processes including removal of frozen material from a mold or cooling surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:
353 for a heat absorber with a product remover.

This subclass is indented under subclass 71. Processes wherein a frozen material is removed by flexing a supporting surface, e.g., endless belt.

SEE OR SEARCH THIS CLASS, SUBCLASS:
345 for apparatus utilizing a moving freezing surface.

This subclass is indented under subclass 71. Processes including application of heat.

SEE OR SEARCH THIS CLASS, SUBCLASS:
349 for congealing apparatus with thawing means.

This subclass is indented under subclass 66. Processes wherein a material is sprayed or dripped into a zone.

SEE OR SEARCH THIS CLASS, SUBCLASS:
64 for processes involving contact of an article with a liquid.
347 for related apparatus.

SEE OR SEARCH CLASS:
159, Concentrating Evaporators, 48.1 for process of concentrating a liquid involving spraying by application of vacuum.
264, Plastic and Nonmetallic Article Shaping of Treating: Processes, subclass 5 for processes of forming solid particulate matter directly from a molten or liquid mass, e.g., liquid comminuting.
425, Plastic Article or Earthenware Shaping or Treating: Apparatus, 6 for a means to manufacture particulate material directly from a molten material generally by comminuting the material in a means providing a zone below the freezing point of the material.

This subclass is indented under subclass 66. Processes wherein a step of freezing or cooling is followed by another step of freezing, or a prefrozen material is added to another material which is then frozen into a composite solid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
65 for processes of treating an article involving use of diverse sequential temperatures.

This subclass is indented under subclass 56. Processes which includes producing a refrigerant and introducing it into a refrigerating system.

SEE OR SEARCH THIS CLASS, SUBCLASS:
4 for processes and apparatus utilizing the endothermic action of a chemical reaction or the dissolving of a solid.
114 for processes employing diverse materials or a particular refrigerant in a refrigeration operation.
330 for related apparatus.

SEE OR SEARCH CLASS:
252, Compositions, 67, 70 and 71 for compositions and related processes of making them.

This subclass is indented under subclass 56. Processes which include assembling parts of a refrigeration apparatus, installing the refrigeration apparatus in its position of use, charging the apparatus with a fluid (usually refrigerant or lubricant) or repairing some part of the apparatus which has been damaged.

SEE OR SEARCH THIS CLASS, SUBCLASS:
292 for charging apparatus.
298 for assembly apparatus.

SEE OR SEARCH CLASS:
29, Metal Working, 890.03 particularly subclass 890.035 for processes of mechanical manufacture of an element, and subclasses 428+ for processes of assembling elements of a refrigeration device.
137, Fluid Handling, subclasses 15.01-15.26 for a process of cleaning, repairing or assembling, subclasses 237-246.23 with a cleaner, lubrication added to fluid or liquid sealing at a valve interface, or subclasses 315.01-329.4 for a fluid handling system with repair, tapping, or assembly means.
228, Metal Fusion Bonding, 101 for the process of assembling and fusion bonding of the elements of a refrigeration device.

This subclass is indented under subclass 56. Processes which include deodorizing, antisepticizing or germiciding the material which is subjected to refrigeration or providing a special atmosphere in a cooled space.

SEE OR SEARCH THIS CLASS, SUBCLASS:
56 for processes of cooling involving subjecting to a melting or subliming refrigerant.
91 for processes involving humidifying.
93 for dehumidifying air.
121 for gas-liquid contacting processes.
264 for apparatus including illuminating or radiant energy means, e.g., ultraviolet.
388 for apparatus wherein a sublimed gas enters a cooled enclosure.

SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 516 for drying processes involving special atmosphere.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, 1 for subject matter of more general utility.
424, Drug, Bio-Affecting and Body Treating Compositions, appropriate subclass for an antiseptic composition and 76.1 for a deodorizing composition.

This subclass is indented under subclass 56. Processes in which (1) heat is exchanged with a disparate (nonrefrigeration) system, or (2) refrigeration is produced by plural separate systems, there being a heat transfer relationship between the systems.
(1) Note. Evaporation and condensation are considered to be refrigeration production.

SEE OR SEARCH THIS CLASS, SUBCLASS:
81 for processes of defrosting utilizing a fluid which may include the use of heat to vaporize a heat transfer fluid which is condensed in the vicinity of the heat absorber.
96 and 99, for processes involving nonchange of state by indirect transfer fluid operations.
175 for automatic control of related systems.
238 for refrigeration apparatus exchanging heat with disparate means.
332 for diverse refrigeration systems.
335 for a refrigeration system with plural paired elements.

This subclass is indented under subclass 56. Processes which include inhibiting deposition of, or removing frozen atmospheric condensate from, a heat absorbing surface of refrigeration apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:
150 for automatic control of related apparatus.
272 for related apparatus.

This subclass is indented under subclass 80. Processes accomplished by utilizing a fluid used in the refrigeration process.

SEE OR SEARCH THIS CLASS, SUBCLASS:
277 for related apparatus.

This subclass is indented under subclass 80. Processes wherein a fluid, which is unnecessary to the refrigeration process is utilized.

SEE OR SEARCH THIS CLASS, SUBCLASS:
282 for related apparatus.

This subclass is indented under subclass 56. Processes in which a liquid is prevented from entering the suction inlet to the compressor.

SEE OR SEARCH THIS CLASS, SUBCLASS:
84 for other processes involving lubrication of a refrigeration system.
113 for processes involving transferring heat between diverse function portions of a refrigeration cycle for other purposes.
174 for automatic control of trapping and discharging refrigerant batches.
503 509, 512, and 513, for refrigeration apparatus with features which may prevent slugging.

This subclass is indented under subclass 56. Processes which involves handling a liquid lubricant within a circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:
83 for processes of preventing slugging.
85 for processes involving separating impurities from refrigerant and see the Notes, thereto.
192 for automatic control of refrigeration producer lubrication.
468 for related apparatus.

This subclass is indented under subclass 56. Processes which include the separating or prevention of the formation of undesirables in a refrigerant, on the internal surface of a refrigerant container or from a material being cooled, e.g., internal freeze inhibition.

SEE OR SEARCH THIS CLASS, SUBCLASS:
77 for processes involving charging a refrigeration producing system which may also remove undesirable matter.
78 for processes involving deodorizing, antisepticizing or providing a special atmosphere.
80 for processes involving defrosting.
83 for processes involving prevention of refrigerant slugging.
84 for lubricant handling processes.
93 for processes involving gas dehumidification.
317 for apparatus for clarifying or separating materials from an external cooled gas.
468 for a refrigeration producer and lubricant handler.
474 for a refrigeration producer with a refrigerant treater.

This subclass is indented under subclass 56. Processes in which a gas is expanded to such a degree that a discernible drop in the temperature thereof is produced thereby, the gas remaining as such during the cooling operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
613 621+, 645+, and 649+, for processes and apparatus for liquefying or solidifying a gas.
115 for processes involving compressing, condensing and evaporating a fluid.
401 for related apparatus.

This subclass is indented under subclass 86. Processes in which a portion of the energy of expansion is converted to usable mechanical movement.

SEE OR SEARCH THIS CLASS, SUBCLASS:
38 for operation with an expansion engine.
402 for related apparatus.

This subclass is indented under subclass 87. Processes in which the gas stream is reheated subsequent to expansion.

SEE OR SEARCH THIS CLASS, SUBCLASS:
90 for processes involving cooling and reheating of a gas.

This subclass is indented under subclass 56. Processes in which a gas external of a refrigeration producer is caused to circulate.

SEE OR SEARCH THIS CLASS, SUBCLASS:
86 for processes involving reducing pressure on a compressed gas.
404 for related apparatus.

SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 428 for a process of cooling solids by mere contact with a gas, and see notes in the definition of this subclass.

This subclass is indented under subclass 89. Processes in which the gas is heated following the cooling operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
113 for processes of reheating cooled fluid of a refrigeration cycle by internal exchange.
173 for an automatically controlled apparatus having a similar function.
272 particularly subclasses 275+, for a cooler with a condensate remover which may include air reheating.
428 for an air cooler with means directing air over a heat rejector which may include air cooling and reheating by a refrigeration producer.

SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 223 for a reheating means automatically controlled by a humidistat, subclass 263 for reheating means controlled by temperature, and subclass 65 for a heater and cooler serially arranged in a flow path.

This subclass is indented under subclass 89. Processes in which moisture is added to the gas being cooled.

This subclass is indented under subclass 91. Processes in which moisture is removed from the gas.

SEE OR SEARCH THIS CLASS, SUBCLASS:
80 for processes of defrosting or frost inhibiting.
85 for removal of undesirables other than moisture.

This subclass is indented under subclass 89. Processes in which moisture is removed from the gas.

SEE OR SEARCH THIS CLASS, SUBCLASS:
92 for moisture removing processes combined with moisture addition.

This subclass is indented under subclass 93. Processes by passing the gas in contact with a sorbent.

SEE OR SEARCH THIS CLASS, SUBCLASS:
271 for related apparatus and see the Notes thereto.

This subclass is indented under subclass 89. Processes in which gas is subjected to the cooling action of plural heat absorbing operations or of separate and distinct operations of a heat absorption.

SEE OR SEARCH THIS CLASS, SUBCLASS:
65 for plural temperature treatment of an article.
75 for sequential treatment of a congealing flowable material.

This subclass is indented under subclass 89. Processes in which heat from the circulating gas being cooled is transferred to a heat absorber by indirect heat exchange through an intermediate fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
406 for related apparatus.

This subclass is indented under subclass 89. Processes in which two streams of gas having diverse temperatures are combined into a single stream.

SEE OR SEARCH THIS CLASS, SUBCLASS:
122 for other refrigeration processes involving combining of fluid having diverse temperature.

This subclass is indented under subclass 56. Processes in which refrigeration is used to absorb heat from a fluid (usually a liquid) which is isolated from the working fluid of a refrigeration cycle.

SEE OR SEARCH THIS CLASS, SUBCLASS:
89 particularly subclass 96 for processes wherein the fluid cooled is air.

This subclass is indented under subclass 98. Processes in which the heat removed from the external cooled fluid is transferred to a heat absorber by indirect heat exchange through an intermediate fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
396 for a liquid in heat exchange with a coolant.
430 for related apparatus.

This subclass is indented under subclass 56. Processes in which a subatmospheric pressure is created in a chamber by removing a gas or vapor from it.

SEE OR SEARCH THIS CLASS, SUBCLASS:
268 for related apparatus and see the Notes thereto.

SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 402 for related processes of drying solids.
159, Concentrating Evaporators, 47.1 for related processes of evaporating and concentrating liquids.

This subclass is indented under subclass 56. Processes in which a liquid is evaporated to produce cooling and the vapor is sorbed by a sorbent.

SEE OR SEARCH THIS CLASS, SUBCLASS:
100 for vacuumizing an open outlet chamber which may include the use of a sorbent.
141 for automatic control of a sorbent system.
476 for a sorbent type refrigeration producer.

This subclass is indented under subclass 101. Processes in which plural refrigerants are evaporated in presence of each other.

SEE OR SEARCH THIS CLASS, SUBCLASS:
114 for other processes of refrigeration production utilizing plural refrigerants.

This subclass is indented under subclass 101. Processes in which a fluid is circulated at varying rates.

This subclass is indented under subclass 103. Processes in which fluid circulation is altered by varying the heat input or the heat rejected by the system.

SEE OR SEARCH THIS CLASS, SUBCLASS:
148 for automatic control of the heating means of a sorption system.
183 for automatic control of a fluid for a heat rejecter.

This subclass is indented under subclass 103. Processes in which the flow of a nonrefrigerant fluid, e.g., inert gas or a noncondensible gas is varied.

SEE OR SEARCH THIS CLASS, SUBCLASS:
104 for related processes in which the fluid flow may be modulated by varying the heat input or the heat rejection.
490 for a sorption system utilizing an inert gas.

This subclass is indented under subclass 101. Processes in which generation of refrigerant vapor alternates with absorption.

SEE OR SEARCH THIS CLASS, SUBCLASS:
143 for automatic control of such a unit.
477 for related apparatus.

This subclass is indented under subclass 101. Processes wherein the sorption liquid is transferred between the generator and sorber due to pressures of fluids generated within the system.

SEE OR SEARCH THIS CLASS, SUBCLASS:
487 for related apparatus.

This subclass is indented under subclass 101. Processes including the transferral of liquid refrigerant to and through the evaporator against gravity.

This subclass is indented under subclass 101. Processes wherein the cooling is effected by vaporization of refrigerant from a sorption solution.

This subclass is indented under subclass 101. Processes wherein an inert gas is admitted into or overlies a body of liquid refrigerant, the liquid refrigerant diffusing into the inert gas.

SEE OR SEARCH THIS CLASS, SUBCLASS:
490 for related apparatus.

This subclass is indented under subclass 110. Processes in which the fluid is caused to circulate between the evaporator and sorber due to the creation of conditions other than those which allow the fluid to circulate due to differences in density.

SEE OR SEARCH THIS CLASS, SUBCLASS:
109 for processes involving cooling by evaporation from a sorbent solution.

This subclass is indented under subclass 101. Processes in which a specific refrigerant and/or sorbent is used.

SEE OR SEARCH THIS CLASS, SUBCLASS:
114 for more general processes utilizing diverse materials or particular refrigerants.
502 for apparatus utilizing diverse refrigerants.

This subclass is indented under subclass 56. Processes in which one portion of a refrigeration system having a first function is in heat exchange relation with another portion having another function.

SEE OR SEARCH THIS CLASS, SUBCLASS:
513 for related apparatus.

SEE OR SEARCH CLASS:
203, Distillation: Processes, Separatory, 21 for a separatory distillation process directed to recovering heat from a material in the system by indirect heat exchange with a second material. The source of heat may be a distillate or a residue and the transfer of heat may take place at any point in the system.

This subclass is indented under subclass 56. Processes employing diverse refrigerants or a particular material as a refrigerant.

SEE OR SEARCH THIS CLASS, SUBCLASS:
85 for processes of preventing formation of undesirables.
86 for processes involving air as a refrigerant.
112 for sorption type refrigeration processes utilizing particular refrigerant and/or sorbent materials.
490 for sorbent type refrigeration apparatus including inert
gas means.
502 for a compressor-condenser-evaporator apparatus using diverse fluids.

SEE OR SEARCH CLASS:
252, Compositions, 67 for refrigerant compositions, per se.

This subclass is indented under subclass 56. Processes which include compressing, condensing and evaporating a refrigerant.

SEE OR SEARCH THIS CLASS, SUBCLASS:
86 for processes involving pressure reduction on a fluid which is a gas at all stages of the process.
498 for related apparatus.

This subclass is indented under subclass 115. Processes in which the motive energy of a fluid is employed to compress the fluid in the refrigeration cycle.

SEE OR SEARCH THIS CLASS, SUBCLASS:
500 for jet powered apparatus.
501 for a fluid energized compressor.

This subclass is indented under subclass 115. Processes in which the refrigerant in at least one portion of its flow path is divided into two or more flow paths.

SEE OR SEARCH THIS CLASS, SUBCLASS:
196 for automatic control of by-pass means.
504 for a compressor-condenser-evaporator circuit with means
to apportion flow to its evaporator.
525 for an evaporator with a particular flow distributor to sections thereof.

This subclass is indented under subclass 56. Processes wherein a fluid is pumped in a closed circuit, absorbing and rejecting heat.

SEE OR SEARCH THIS CLASS, SUBCLASS:
86 in which pressure is reduced on a gas, the gas remaining as such during the cooling operation.
89 and 98+, for processes involving circulation of an external fluid.
115 for processes involving compressing, condensing and evaporating.
430 particularly subclass 435 for apparatus utilizing an intermediate heat transfer fluid.

This subclass is indented under subclass 56. Processes comprising heat absorption in one area and heat dissipation in another area, and utilization of a fluid heat transfer medium moving between said area which medium changes state in each of said absorption and dissipation steps.

SEE OR SEARCH THIS CLASS, SUBCLASS:
51.1 for apparatus comprising only a connected liquid receiver (condenser) and evaporator a cryostat.
115 for processes involving compression, condensation and evaporation.

This subclass is indented under subclass 56. Processes in which the operations are physically or temporarily spaced.

SEE OR SEARCH THIS CLASS, SUBCLASS:
65 for diverse temperature treating of an article.
95 for plural steps of cooling air.

This subclass is indented under subclass 56. Processes in which cooling is effected by reasons of mutually contacting a gas and a liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
304 for related apparatus.

This subclass is indented under subclass 56. Processes in which streams of fluids having diverse temperatures are combined.

SEE OR SEARCH THIS CLASS, SUBCLASS:
97 for similar processes wherein the streams are air streams.

This subclass is indented under the class definition. Apparatus having means to separate a constituent of a liquid mixture by cooling it, e.g., congealing the constituent, and means to remove the congealed constituent from the liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
317 for means separating a constituent or portion from a fluid by filtration or gravitational separation.
532 for related processes.

SEE OR SEARCH CLASS:
117, Single-Crystal, Oriented-Crystal, and Epitaxy Growth
Processes; Non-Coating Apparatus Therefor, for processes and non-coating apparatus for growing therein-defined single-crystal of all types of materials, including inorganic or organic, including those having refrigeration steps or means.
159, Concentrating Evaporators, subclass 45 for evaporating apparatus for graining and separating crystals.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, 245.1 for non-coating crystallization apparatus not including chemical reaction means, not including refrigeration means, and not provided for elsewhere, and subclasses 129+ for non-coating crystallization apparatus which include means for a chemical reaction, which may or may not include refrigeration means, and which are not provided for elsewhere.

This subclass is indented under subclass 123. Apparatus including means for heating a liquid mixture container.

This subclass is indented under the class definition. Apparatus provided with an indicator or testing means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
246 for apparatus which merely displays a commodity within a cooled compartment.

SEE OR SEARCH CLASS:
137, Fluid Handling, 551 for a fluid system of general application with an indicator or tester.
340, Communications: Electrical, subclass 585 for electrical indicating systems automatically responsive to the thermal condition of refrigerated storage.

This subclass is indented under subclass 125. Apparatus in
which there is operative correlation between indicating and automatic refrigeration control means.

This subclass is indented under subclass 125. Apparatus comprising a plurality of different function indicating or testing means.

SEE OR SEARCH CLASS:
340, Communications: Electrical, 521 for electrical automatic indicating systems responsive to plural diverse conditions.

This subclass is indented under subclass 125. Apparatus in which the presence of atmospheric condensate is indicated.

SEE OR SEARCH CLASS:
340, Communications: Electrical, subclass 580 for electrical automatic indicating systems responsive to ice formation.

This subclass is indented under subclass 125. Apparatus which automatically responds to a variable condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:
125 for a gauge glass which enables movement of a refrigerant to be observed.

SEE OR SEARCH CLASS:
340, Communications: Electrical, 500 for electrical automatic condition responsive indicating systems.

This subclass is indented under subclass 129. Apparatus in which the condition is material being cooled.

This subclass is indented under subclass 125. Apparatus in which the position or extent of motion of a movable element is indicated.

SEE OR SEARCH CLASS:
340, Communications: Electrical, 686.1 for electrical automatic indicating systems responsive to position.

This subclass is indented under the class definition. Apparatus comprising means to sense an operating condition or change of operating condition and exert a control on cooling means or means handling material cooled or to be cooled.

SEE OR SEARCH THIS CLASS, SUBCLASS:
126 for an indicator or tester correlated with automatic control.
231 for a time or program actuator.

SEE OR SEARCH CLASS:
137, Fluid Handling, appropriate subclass for automatic control of fluid handling of general application, particularly 59 for freeze responsive safety means and subclasses 78+ for atmospheric condition change responsive control.
165, Heat Exchange, subclass 200 for automatic control of a heat exchanger not specialized by structure to refrigeration.
236, Automatic Temperature and Humidity Regulation, appropriate subclass for an automatic temperature regulation system.

This subclass is indented under subclass 132. Apparatus responsive to any phase of motion of a vehicle.

SEE OR SEARCH THIS CLASS, SUBCLASS:
215 226+ and 228, for refrigerator-compressor drive control or response even though the drive is a vehicle motor.

This subclass is indented under subclass 133. Apparatus including an electrical motor-generator.

This subclass is indented under subclass 132. Apparatus comprising means responsive to a change of condition of a consumable product undergoing congelation.

This subclass is indented under subclass 135. Apparatus in which the condition is a change of consistency.

This subclass is indented under subclass 135. Apparatus in which the sensing means responds to an accumulation of the congealed product.

SEE OR SEARCH THIS CLASS, SUBCLASS:
139 for condition sensing control by other accumulation, e.g., frost on a freezing surface, i.e., apparatus not having mechanical means to remove the accumulation.

This subclass is indented under subclass 137. Apparatus wherein the accumulation is on a cooled surface.

This subclass is indented under subclass 132. Apparatus responsive to the accumulation of congealed material on a freezing surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:
135 for a similar control related to means manufacturing and removing or working a congealed consumable product.

This subclass is indented under subclass 139. Apparatus in which the condition sensed is the accumulation of frozen atmospheric condensate.

SEE OR SEARCH THIS CLASS, SUBCLASS:
151 for other automatic handling of frost.

SEE OR SEARCH CLASS:
250, Radiant Energy, subclass 215 for photocell control with a specific art device there provided for.

This subclass is indented under subclass 132. Apparatus controlling a refrigeration producer utilizing a sorbent for the refrigerant.

SEE OR SEARCH THIS CLASS, SUBCLASS:
101 for processes of refrigeration utilizing a sorbent.

This subclass is indented under subclass 141. Apparatus in which a refrigerant or sorbent containing element is caused to be intermittently and repeatedly subjected to generating-condensing pressure and absorbing-evaporating pressure.

This subclass is indented under subclass 142. Apparatus wherein the sorbent container serves at one time as a still and at another time as a sorber.

This subclass is indented under subclass 143. Apparatus comprising at least two sorbent containing units controlled for alternate or sequential generation or sorption.

This subclass is indented under subclass 144. Apparatus in which the units are serially interconnected for refrigerant or absorbent flow from one to another.

This subclass is indented under subclass 143. Apparatus wherein flow of cooling medium for a unit is controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:
481 for absorber-generator cooling structure, per se.

This subclass is indented under subclass 146. Apparatus in which sorbent or refrigerant flow is also controlled.

This subclass is indented under subclass 141. Apparatus including means to control the supply of heat to a sorbent regenerator.

This subclass is indented under subclass 132. Apparatus which controls or responds to means adding or withdrawing refrigerant to or from a closed circuit type refrigeration system, relative to a source external of the system.

SEE OR SEARCH THIS CLASS, SUBCLASS:
174 for means collecting and discharging refrigerant batches within the system.

This subclass is indented under subclass 132. Apparatus which is responsive to or controls means which prevents, removes or handles atmospheric condensate.

This subclass is indented under subclass 150. Apparatus which relates to removal of frozen atmospheric condensate.

SEE OR SEARCH THIS CLASS, SUBCLASS:
140 for condition sensing control measuring frost accumulation.
162 for a control which resumes its function after manual initiation, e.g., manual initiation of defrosting means then
the sensing control causes the refrigeration producer to resume operation.
234 for time or program actuated defrosting means.

This subclass is indented under subclass 151. Apparatus in which the defrosting control acts to defrost a limited area of the space cooled or one section of a cooling means in preference to another, e.g., defrosting controls for two zone refrigerators.

SEE OR SEARCH THIS CLASS, SUBCLASS:
197 for an evaporation by-pass control which may be similar in operation.

This subclass is indented under subclass 151. Apparatus which responds to actuation of a storage compartment closure, e.g., a door.

SEE OR SEARCH THIS CLASS, SUBCLASS:
162 for means to manually initiate the operation of the sensing means.
267 for interlocked diverse function elements, e.g., door and refrigeration producer.

This subclass is indented under subclass 151. Apparatus responsive to operation of the power input means of a refrigeration producer, e.g., motor or compressor.

This subclass is indented under subclass 151. Apparatus with
a timing or programming device.

SEE OR SEARCH THIS CLASS, SUBCLASS:
234 for a time or program actuated system.

This subclass is indented under subclass 151. Apparatus including thermally responsive means.

This subclass is indented under subclass 132. Apparatus with a time or program actuator.

This subclass is indented under subclass 157. Apparatus in which there is means delaying the normal operation of the automatic control.

This subclass is indented under subclass 132. Apparatus controlling, or responsive to, means selectively heating or cooling.

SEE OR SEARCH THIS CLASS, SUBCLASS:
324 for a reversible heat pump and see the Notes thereto.

This subclass is indented under subclass 159. Apparatus comprising means to reverse flow through a refrigeration producing cycle so as to reverse the function of the heat
absorbing or rejecting means of the cycle.

This subclass is indented under subclass 132. Apparatus so related to (1) manually operated means, or (2) other means external of the refrigeration producer, as to modify the manner of operation of the automatic control.
(1) Note. The term "manually actuated means" does not include starting or stopping means such as a line switch or means for adjusting a control point of a sensing means, e.g., adjustable thermostat.

SEE OR SEARCH THIS CLASS, SUBCLASS:
267 for interlocked diverse function elements, per se.

This subclass is indented under subclass 161. Apparatus in which an operative control cycle is initiated manually and is terminated automatically.

SEE OR SEARCH THIS CLASS, SUBCLASS:
153 for means determining a number of door operations to control defrosting.

This subclass is indented under subclass 161. Apparatus in which operation is under selective control, e.g., either by manual or automatic control.

This subclass is indented under subclass 161. Apparatus in which a manual operator resets a condition sensing means and also sets or resets another control element.

This subclass is indented under subclass 132. Apparatus controlling, or responsive to, means involving the use of a solidified gas (CO[subscrpt]2[end subscrpt]).

SEE OR SEARCH THIS CLASS, SUBCLASS:
384 for a material or space cooler using a solidified gas.

This subclass is indented under subclass 165. Apparatus having different control or response means.

This subclass is indented under subclass 165. Apparatus in which (1) a heater, or (2) means varying heat transmission, is controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:
383 for refrigeration means utilizing variable thermal means.

This subclass is indented under subclass 165. Apparatus which is temperature responsive, e.g., venting of the gas is thermostatically controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:
167 for thermostatic control of a heater, heat transmitter or secondary heat exchanging fluid.

This subclass is indented under subclass 132. Apparatus which controls, or is responsive to, means having a chamber containing a liquid, or a wetted solid, e.g., lettuce.
(1) Note. The vapor may be condensed, heated and vaporized to supply the evacuating pump.

SEE OR SEARCH THIS CLASS, SUBCLASS:
100 for processes involving vacuumizing an open outlet chamber.
191 for automatic control of a closed cycle refrigeration producer having a jet-type compressor.
268 for vacuumized open outlet chamber refrigeration apparatus.

This subclass is indented under subclass 169. Apparatus in which the sensing means controls, or responds to, the operation of the evacuating means.

This subclass is indented under subclass 132. Apparatus controlling, or responding to, the flow of the gas or liquid of a gas-liquid contacting cooler.

SEE OR SEARCH THIS CLASS, SUBCLASS:
271 for an atmosphere and sorbent contacting cooler which may include a liquid sorbent.
304 for material cooling means, utilizing gas-liquid contact means.

SEE OR SEARCH CLASS:
261, Gas and Liquid Contact Apparatus, particularly 121 for a gas-liquid contactor having no features for refrigeration.

This subclass is indented under subclass 132. Apparatus controlling or responding to the operation of an air compressor-cooler-expander type refrigerant producer.

SEE OR SEARCH THIS CLASS, SUBCLASS:
401 for an air-compressor-cooler expander machine.

This subclass is indented under subclass 132. Apparatus in which the means controlled utilizes some or all of the heat of a heat rejecting portion of the same or another refrigeration producer for reheating an external fluid which has been cooled, e.g., air.

SEE OR SEARCH THIS CLASS, SUBCLASS:
90 for processes of air cooling and reheating.
159 for control of a selective heating or cooling refrigeration producer.
428 for an air cooler with means for heating air over a heat rejector.

SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 223 for a refrigeration producer having a reheating means, other than a heat rejection portion of a refrigeration producer, that is controlled by a humidistat; and subclass 263 for such reheat means controlled by temperature.

This subclass is indented under subclass 132. Apparatus controlling, or responsive to, means trapping and retaining a quantity of liquefied refrigerant and which trapping means is actuated to intermittently discharge said refrigerant in batches.

SEE OR SEARCH THIS CLASS, SUBCLASS:
83 for processes of preventing refrigerant slugging.
84 for processes involving lubricant handling.
503 for a liquid trap in a refrigerant line.
509 for a condensed refrigerant receiver.
512 for a vapor-liquid separator and liquid recycle means.

This subclass is indented under subclass 132. Apparatus controlling, or responsive to (1) a refrigeration producing system having diverse refrigeration producing means, (2) a refrigeration producing system in which the same refrigerant flows through two pairs of elements in circuits which are interconnected for fluid flow between them, or (3) a refrigeration system having circuits isolating the fluid in one from the other and having at least two similar elements in each circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:
332 for an ice and mechanical system.
335 for refrigeration producing elements in cascade.

Humidity sensor:
This subclass is indented under subclass 132. Apparatus which senses moisture in the air to be refrigerated.

SEE OR SEARCH CLASS:
73, Measuring and Testing, 29.02 for an hygrometer.
236, Automatic Temperature and Humidity Regulation, subclass 44 for a humidity control of general utility.

Having defrost control related to humidity:
This subclass is indented under subclass 176.1. Apparatus in which the sensed humidity of the cooled space exerts at least a partial control of some phase of a defrosting operation.
(1) Note. In a nominally time controlled defroster, the intervals of defrosting are directly proportional to the
humidity level.

SEE OR SEARCH THIS CLASS, SUBCLASS:
151 for automatic control of defrosting.

Controlling variable compressor capacity:
This subclass is indented under subclass 176.1. Apparatus in which the output of a compressor is varied in response to the sensed humidity, e.g., unloading variable speed, compressor staging, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:
510 for plural compressors.

SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation, subclass 1 for automatic control of refrigeration systems by multistage controls.
307, Electrical Transmission or Interconnecting Systems, subclass 39 for condition responsive plural load circuits.

Controlling gas-liquid contactor for air:
This subclass is indented under subclass 176.1. Apparatus which there is an air-liquid contactor controlled at least in part by an air humidity sensor, e.g., evaporative type cooler.

SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 226 for control of a gas-liquid fluid control by humidity sensor.

Control of air heater, e.g., reheat pump:
This subclass is indented under subclass 176.1. Apparatus in which there is provided a means to regulate an air heater, e.g., reheat, to control the humidity in the ambient air.

SEE OR SEARCH THIS CLASS, SUBCLASS:
90 for methods involving reheating.
173 for automatic control of reheating.

Plus air temperature sensor exerting a control:
This subclass is indented under subclass 176.1. Apparatus in which an air temperature sensor acts in conjunction with the air humidity sensor to exert a control; the air temperature sensor could be alternative to or modifying the air humidity sensor.

SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation, subclass 44 for systems in which the temperature and humidity are controlled.

This subclass is indented under subclass 132. Apparatus controlling a fluid other than a refrigerant, a cooled product or a product to be cooled.

This subclass is indented under subclass 177. Apparatus, (1) controlling a plurality of means, at least one handling a fluid or product, or (2) diverse function sensing means controlling an external fluid or means.

This subclass is indented under subclass 178. Apparatus in which the plurality of controlled means are external of the refrigeration producer.

This subclass is indented under subclass 178. Apparatus controlling fluid external of cooling means and a refrigeration producer or operative element thereof.

This subclass is indented under subclass 180. Apparatus controlling flow of a condenser cooling fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
183 for other automatic control of or by cooling fluid for a heat rejector.

This subclass is indented under subclass 180. Apparatus in which the controls are arranged so that they operate in a determined sequence.

SEE OR SEARCH THIS CLASS, SUBCLASS:
181 for diverse control or response related to condenser cooling.

This subclass is indented under subclass 177. Apparatus controlling the fluid which cools a heat rejective element of a refrigeration producer.

SEE OR SEARCH THIS CLASS, SUBCLASS:
181 for condenser cooling fluid control and refrigeration producer control or response and see the Notes thereto.

This subclass is indented under subclass 183. Apparatus responsive to a condition of a refrigerant within a refrigeration producer, e.g., temperature or pressure.

This subclass is indented under subclass 177. Apparatus responsive to, or controlling, flow of an indirect heat transferring coolant, e.g., brine.

SEE OR SEARCH THIS CLASS, SUBCLASS:
430 for a cooling system using an intermediate fluid or holdover.

This subclass is indented under subclass 177. Apparatus controlling, or responsive to, means forcing, directing or allowing flow of air.

SEE OR SEARCH THIS CLASS, SUBCLASS:
404 for cooling means having a controller or director, per se.

This subclass is indented under subclass 186. Apparatus in which the movement of an air circulation controlling damper between compartments is controlled.

This subclass is indented under subclass 177. Apparatus controlled by fluid level, e.g., a valve is controlled by a float.

SEE OR SEARCH CLASS:
137, Fluid Handling, 386, particularly subclasses 410+ for a
float controlled valve.

This subclass is indented under subclass 177. Apparatus responsive to, or controlling, the flow of the external fluid, e.g., a check valve.

SEE OR SEARCH CLASS:
137, Fluid Handling, 511 for a check valve.

This subclass is indented under subclass 132. Apparatus responsive to or controlling, a refrigeration producer.

SEE OR SEARCH THIS CLASS, SUBCLASS:
467 for a refrigeration producer.

This subclass is indented under subclass 190. Apparatus in which the sensing means controls or responds to a closed type refrigeration producer employing a jet type compressor.

SEE OR SEARCH THIS CLASS, SUBCLASS:
170 for automatic control of means evacuating an open outlet chamber.

SEE OR SEARCH CLASS:
417, Pumps, 182 for jet pump regulation.

This subclass is indented under subclass 190. Apparatus controlling, or responsive to, a condition of a lubricating means or the lubricant.

This subclass is indented under subclass 192. Apparatus in which the sensing means responds to or controls a refrigerant compressor.

This subclass is indented under subclass 192. Apparatus in which there is a liquid chamber enclosing a liquid level operated fluid flow controller, e.g., valve, which chamber includes a refrigerant vapor outlet means and also means to cause lubricant to be entrained with the vapor passing through said outlet.

SEE OR SEARCH THIS CLASS, SUBCLASS:
218 for a similar float operated liquid control.

This subclass is indented under subclass 190. Apparatus controlling, or responsive to, means removing an undesired constituent, e.g., gas, from a refrigerant producer.

Bypass, e.g., compressor unloading:
This subclass is indented under subclass 190. Apparatus controlling or responsive to, means allowing flow around either a refrigerant condenser, evaporator, compressor or a part of either, e.g., compressor unloading, or directing refrigerant flow to either of two or more evaporators or condensers arranged in parallel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
117 for processes involving dividing refrigerant flow.
174 for control of trapping and discharging refrigerant batches. These devices often trap liquid from the evaporator
outlet and feed it to the receiver.

SEE OR SEARCH CLASS:
417, Pumps, 279 for condition responsive control of the fluid handled by a pump or compressor.

For plural compressor cylinders:
This subclass is indented under subclass 196.1. Apparatus in which there is control of either a compressor unit or system comprising more than one compression chamber, e.g., multistage, multicylinder, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:
510 for plural compressors.

SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation, subclass 1 for refrigeration systems controlled multistage control.

Direct bypass of compressor:
This subclass is indented under subclass 196.1. Apparatus in which the gas discharged from the compressor goes directly to the compressor suction, e.g., compressor unloading.

SEE OR SEARCH CLASS:
417, Pumps, 297 for compressor unloading.
418, Rotary Expansible Chamber Devices, subclass 14 for rotary expansible chamber compressor unloading.

Condenser bypass:
This subclass is indented under subclass 196.1. Apparatus in which refrigerant is caused to bypass part or all of a condenser.
(1) Note. The condenser may be part of a condenser system having plural condensers.

This subclass is indented under subclass 196. Apparatus in which the refrigerant fluid bypasses a restrictor, evaporator or the suction line returning to a compressor.

SEE OR SEARCH THIS CLASS, SUBCLASS:
216 for evaporation zone control or response, per se.

This subclass is indented under subclass 197. Apparatus in which evaporators are arranged for serial flow and the refrigerant fluid bypasses at least one of them.

This subclass is indented under subclass 197. Apparatus in which the bypass for refrigerant fluid around the evaporator is to another evaporator, i.e., the evaporators are in parallel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
504 for means to apportion flow to evaporators.
525 for an evaporator with plural distinct zones or sections.

This subclass is indented under subclass 199. Apparatus in which the control means acts to cause flow through one or more of a plurality of evaporators in a selected order so that refrigerant is caused to flow to at least one evaporator in preference to another.

This subclass is indented under subclass 190. Apparatus responsive to a condition, usually temperature, of an external liquid, e.g., withdrawable or heat transfer, (brine) or of a holdover.

SEE OR SEARCH THIS CLASS, SUBCLASS:
430 for secondary liquid and holdover combinations, per se.

This subclass is indented under subclass 190. Apparatus including thermal means not a part of the refrigeration producer or the means cooled by it so related to a sensor that it modifies its action.

SEE OR SEARCH THIS CLASS, SUBCLASS:
209 for other plural sensors and single refrigeration producing elements with compensating or control features.
214 for a single sensor mounted or formed to respond to plural conditions, e.g., compensated sensors.

This subclass is indented under subclass 190. Apparatus comprising a refrigeration producing system having plural operative elements and plural condition sensing means each responding to or controlling at least two of said elements.

This subclass is indented under subclass 203. Apparatus in which at least one of the operative elements is an expansion or variable restrictor controlling the flow of the refrigerant.

SEE OR SEARCH THIS CLASS, SUBCLASS:
216 for control of or by an evaporation zone in which there is a single control or single valve controlled.

This subclass is indented under subclass 204. Apparatus controlling a plurality of expansion valves or variable restrictors for a refrigerant.

This subclass is indented under subclass 205. Apparatus in which both the high (expansion valve) and low side, (back pressure) restrictor or valve are controlled.

This subclass is indented under subclass 190. Apparatus in which operative elements of a refrigeration producer having diverse functions are controlled by single sensing means.

This subclass is indented under subclass 190. Apparatus having plural sensing means which coact to control a single operative element of a refrigeration producer.

This subclass is indented under subclass 208. Apparatus in which the plural sensing means act together to modify or compensate the action of one another.

SEE OR SEARCH THIS CLASS, SUBCLASS:
202 for external thermal source modifying sensor action.
214 for a single sensor mounted or formed to respond to plural conditions, e.g., a compensated sensor.

This subclass is indented under subclass 209. Apparatus controlling a variable refrigerant flow valve or restrictor.

SEE OR SEARCH THIS CLASS, SUBCLASS:
222 for an expansion valve or flow restrictor controlled by a single sensor.

This subclass is indented under subclass 210. Apparatus in which at least one of the sensing elements responds to a condition external of the refrigeration producer.

This subclass is indented under subclass 210. Apparatus in which the plural sensing elements each respond to a condition between expansion means and a suction source.

This subclass is indented under subclass 208. Apparatus in which any one of the plurality of sensing means can alternatively or selectively control the element controlled.

This subclass is indented under subclass 190. Apparatus in which a single sensing means is positioned or formed so as to be responsive to plural conditions.

SEE OR SEARCH THIS CLASS, SUBCLASS:
209 for plural sensors modifying or compensating each other and controlling a single refrigeration producer.

This subclass is indented under subclass 214. Apparatus in which the sensing means controls an element in the compressor or its drive, e.g., its torque or speed.

SEE OR SEARCH THIS CLASS, SUBCLASS:
228 for other sensing control of a compressor or its drive.

This subclass is indented under subclass 190. Apparatus controlling or responding to the condition of an element between or at the outlet of a liquefied refrigerant source, e.g., condenser or receiver, and to the means withdrawing a vapor, e.g., compressor.

This subclass is indented under subclass 216. Apparatus in which the fluid condition in the evaporator is regulated by a variable restrictor between the evaporator outlet and the inlet (suction side) of the compressor.

This subclass is indented under subclass 216. Apparatus in which a valve or variable flow restrictor is controlled by refrigerant liquid level.

SEE OR SEARCH THIS CLASS, SUBCLASS:
194 for float means controlling an evaporator and means entraining lubricant in refrigerant vapors.

This subclass is indented under subclass 218. Apparatus wherein there is a float which responds to a liquid level in a chamber in which the pressure is that between expansion means and a source of suction (compressor).

This subclass is indented under subclass 219. Apparatus in which the suction line opens directly into the float chamber.

This subclass is indented under subclass 220. Apparatus in which the flow controlling valve is in a chamber separated by an isolating partition from the chamber containing the float.

This subclass is indented under subclass 216. Apparatus in which the device controlled is a valve or variable restrictor of an expansion device.

SEE OR SEARCH THIS CLASS, SUBCLASS:
194 197+, 204+, and 218, for other sensing control of expansion means with a variable restrictor.
528 for an evaporator with an adjustable flow controller.

SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation, appropriate subclass, particularly 67 for a thermostatically controlled valve of more general application.

This subclass is indented under subclass 222. Apparatus responsive to a condition external of the refrigeration producing means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
177 for means controlling an external fluid or means, particularly subclasses 180+ for such means combined with a refrigeration producer control.

This subclass is indented under subclass 222. Apparatus responsive to a condition on the low side, i.e., between expansion means and a source of suction.

SEE OR SEARCH THIS CLASS, SUBCLASS:
206 for high and low side response.
212 for plural sensors on the low side.

This subclass is indented under subclass 224. Apparatus in which the condition is the one prevailing at or beyond an evaporator outlet, i.e., the condition of the vapor after evaporation is complete.

This subclass is indented under subclass 216. Apparatus in which the compressor or its drive is controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:
228 for other control of a compressor of or by sensing means.

This subclass is indented under subclass 226. Apparatus in which a temperature sensing means is in heat conducting relationship to an evaporator.

SEE OR SEARCH CLASS:
374, Thermal Measuring and Testing, 141, particularly subclass 147 for means mounting a temperature measuring device on a support.

Compressor or its drive controlled:
This subclass is indented under subclass 190. Apparatus relating to a compressor or its drive.

SEE OR SEARCH THIS CLASS, SUBCLASS:
172 for control of or by an air compressing type refrigeration producer.
187 particularly subclass 180, for diverse control or response involving control of an external fluid or means.
191 for control of or by a jet type compressor.
193 for control of or by lubricating means.
196 for control of or by a by-pass, e.g., compressor unloading.
215 for a single sensor responsive to plural conditions and controlling a compressor.
236 for control of a compressor of or by evaporation zone condition.

SEE OR SEARCH CLASS:
417, Pumps, 1 for condition responsive control of a pump or compressor drive motor, subclasses 212+ for condition responsive control of a pump or compressor drive transmission or displacement; subclasses 274+ for condition responsive control of the volumetric capacity of a pump or compressor; and subclasses 279+ for condition responsive control of the fluid handled by a pump or compressor.

For ice or ice cream maker:
This subclass is indented under subclass 228.1. Apparatus in which the controlled compressor provides the refrigeration effect for a liquid under-going partial or full congelation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
135 for automatic control of the congealed product condition.

By refrigerant pressure:
This subclass is indented under subclass 228.1. Apparatus in which the compressor is controlled by a sensed condition of refrigerant pressure.
(1) Note. The sensed condition here may merely control the compressor in an on-off manner.

SEE OR SEARCH CLASS:
417, Pumps, subclass 38 for control of a pump by a liquid pressure sensor.

By variable speed motor or pulley type mechanism:
This subclass is indented under subclass 228.1. Apparatus in which movement of the compressor working member is varied as a function of a sensed drive condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:
215 for a compressor controlled by a single sensor responding to plural conditions.

By variable compressor output (e.g., unloading, staging, etc.):
This subclass is indented under subclass 228.1. Apparatus in which the output of a single compressor or the combined output of a plurality of compressors is varied as a function of a sensed compressor operating condition, e.g., compressor unloading, compressor staging.

SEE OR SEARCH THIS CLASS, SUBCLASS:
176.3 for control of plural compressors controlled by humidity.
510 for plural compressors.

SEE OR SEARCH CLASS:
236, Automatic Temperature and Humidity Regulation, subclass 1 for refrigeration system staging.

This subclass is indented under subclass 228. Apparatus responsive to a condition of an external cooled ambient gas.

This subclass is indented under subclass 228. Apparatus responsive to a condition of the compressor power source or drive.

SEE OR SEARCH THIS CLASS, SUBCLASS:
133 for a control responsive to vehicle motion or traction feature, the traction feature generally being the prime mover for the refrigeration producer.

This subclass is indented under the class definition. Apparatus whereby (1) the time in which or length of time taken to perform an operation is controlled, (2) there is either a fixed continuous sequential or fixed repetitive operation of means performing a treating operation, or (3) there is means terminating a single operation in a fixed position to restart an additional cycle, which cycle is more complex than a mere starting or stopping of a single device.

SEE OR SEARCH THIS CLASS, SUBCLASS:
155 and 157+, for automatic control combined with time or program control.

SEE OR SEARCH CLASS:
137, Fluid Handling, 624.11 for fluid handling of a more general utility with a program or time actuator.
200, Electricity: Circuit Makers and Breakers, 19.01 for a periodic switch, subclasses 33+ for a switch with an actuation retarder.
337, Electricity: Electrothermally or Thermally Actuated Switches, 301 for thermally actuated switches which are continuously driven or time controlled.

This subclass is indented under subclass 231. Apparatus relating to operation of a closed sorption type refrigeration producer.

SEE OR SEARCH THIS CLASS, SUBCLASS:
141 for automatic control of a sorbent type refrigeration producer.

This subclass is indented under subclass 231. Apparatus relating to operation of congelation apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:
135 for control of a congelation product maker by product condition.
340 for a congelation product maker, per se.

This subclass is indented under subclass 231. Apparatus relating to a defrosting operation of a refrigeration producer.

SEE OR SEARCH THIS CLASS, SUBCLASS:
140 and 151, for automatic control of defrosting.

This subclass is indented under the class definition. Apparatus designed for ice skating purposes.

UTILIZING SOLAR ENERGY:
This subclass is indented under the class definition. Subject matter subjecting a material to the heat energy of the sun.

SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 93 for a solar-heated drier.
60, Power Plants, 641.1 for a power plant operated by the sun.
126, Stoves and Furnaces, 569 and 714 for a solar heater.

This subclass is indented under the class definition. Apparatus having two energy sources actuating a refrigeration producer which sources are alternately usable.

SEE OR SEARCH THIS CLASS, SUBCLASS:
134 for means responsive to vehicle body motion or traction and including an electrical generator.
237 a separable ambulant cooled enclosure and a power source.

SEE OR SEARCH CLASS:
307, Electrical Transmission or Interconnection Systems, 64 for substitute or emergency source electrical transmission or interconnecting systems.

This subclass is indented under the class definition. Apparatus comprising an ambulant enclosure, e.g., vehicle, which is cooled by connecting or placing it into juxtaposition with a cooling means or a power source for operating cooling means, e.g., for precooling of an enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
65 for sequential stage processes.
236 for alternatively usable energy sources.
298 for repair, assembly or disassembly means.
448 for a cooled enclosure with a contained movable unit of a refrigeration producing assembly.

DISPARATE APPARATUS UTILIZED AS HEAT SOURCE OR ABSORBER:
This subclass is indented under the class definition. Apparatus in which (a) the heat of a disparate apparatus as an energy source for a refrigeration producer, or (b) the rejected heat of a refrigeration producer is used to heat a disparate apparatus.
(1) Note. A disparate apparatus herein is a nonrefrigerating or cooling means having a function other than merely serving as an energy source for the refrigeration producer.

SEE OR SEARCH THIS CLASS, SUBCLASS:
7 for apparatus and processes wherein a refrigerant is used as a fuel.
38 for liquefied gas producing involving an expansion engine.
61 133+ and 241+, for operation involving motion of a vehicle.
79 for related processes or for processes involving exchanging heat between plural systems.
87 and 401+, for operations involving expanding a gas through an engine.
235.1 for means utilizing solar energy.
259.1 particularly subclass 260 for a refrigerating system
installed in or acting to cool a structure having a function other than merely enclosing a space or handling material.
277 for means utilizing rejected heat to remove atmospheric condensate.
322 for disparate serially arranged product treating means.
323.1 for another internal-combustion engine and refrigeration producing combination.
324.1 for a reversible cycle machine.
501 for apparatus using an external fluid as a power source and as a heat exchanging fluid.
532 and 123+, for processes and apparatus for solidifying a liquid fraction which may include using waste heat to thaw a frozen constituent.

SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, subclass 41.19 for an internal-combustion engine cooled by a refrigeration cycle.

With vortex tube, thermoelectric, stirling or air cycle:
This subclass is indented under subclass 238.1. Apparatus in which there is refrigeration produced by a vortex tube, thermoelectric cycle, Stirling cycle or an air cycle.

SEE OR SEARCH THIS CLASS, SUBCLASS:
5 for refrigeration devices comprising a vortex tube.
6 for refrigeration devices comprising a Stirling cycle.
86 and 401+, for refrigeration system including an internal-combustion engine and not using a compressor.
235.1 for refrigeration devices comprising a thermoelectric cycle utilizing solar energy.
324.2 for a diverse reversible refrigeration system.

With sorption:
This subclass is indented under subclass 238.1. Apparatus wherein refrigeration is produced by utilizing a sorbent for
a refrigeration fluid.
(1) Note. The sorbent being usually a fluid but may be a solid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
101 for processes of sorption.
235.1 for refrigerant systems utilizing solar energy.
476 for sorption apparatus.

SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 62 and 63 for heating and cooling with sorption systems.

With power vapor generator:
This subclass is indented under subclass 238.1. Apparatus wherein the energy for driving the refrigeration system is derived at least in part by the making of vapor, e.g., Rankine cycle, jet pump.

SEE OR SEARCH THIS CLASS, SUBCLASS:
500 for jet pumps powered by refrigerant circuit fluid.
501 for an external fluid actuating a compressor and exchanging heat.

SEE OR SEARCH CLASS:
60, Power Plants, 643 for motive fluid energized by external heating means.
417, Pumps, 76 for details of jet pumps.

With distillation, ice maker, or freeze separation:
This subclass is indented under subclass 238.1. Apparatus comprising (a) separating a more volatile part from a less volatile part of a substance by heating, (b) congelation of a liquid product, or (c) separation of a constituent of a liquid mixture by congelation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
123 and 532+, for freeze separation.
66 and 340+, for ice making.

SEE OR SEARCH CLASS:
202, Distillation: Apparatus, appropriate subclasses for distillation apparatus.
203, Distillation: Processes, Separatory, appropriate subclasses for distillation processes.

With vapor compression system:
This subclass is indented under subclass 238.1. Apparatus in which either a heated disparate apparatus or a disparate heating device is associated with a reverse Carnot cycle refrigeration system.
(1) Note. The evaporator is usually the receiver of the disparate heat and the condenser is usually the heat source for heating the disparate apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:
235.1 for a solar energy heat source.
324.5 for a reversible refrigeration system either with disparate heating or with a disparate heat source.

SEE OR SEARCH CLASS:
237, Heating Systems, subclass 2 for heating systems using the rejected heat of a refrigeration system as a heat source.

Reversible, i.e., heat pump:
This subclass is indented under subclass 238.6. Apparatus in which parts of a refrigeration system may either (a) receive heat from, or (b) give heat to a separate device.
(1) Note. Usually the evaporator is the receiver of the disparate heat and the condenser is the heat source for heating a disparate apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:
235.1 for solar energy as a heat source.

SEE OR SEARCH CLASS:
237, Heating Systems, subclass 2 for heating systems using the rejected heat of a refrigeration system as a heat source.

This subclass is indented under the class definition. Apparatus having (1) means dependent on vehicle motion, (2) a defined vehicle traction feature, or (3) a defined vehicle body feature other than that merely forming the structure enclosing a space to be cooled or supporting a cooling means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
323 for an internal combustion engine in a refrigeration system.
378 for a refrigerator with a conveyor or transporter for articles.
407 and 440+, for structural relationships with enclosures of more general utility.

This subclass is indented under subclass 239. Apparatus relating to a ship.

This subclass is indented under subclass 239. Apparatus utilizing vehicle motion.

SEE OR SEARCH THIS CLASS, SUBCLASS:
61 for related processes.
133 for automatic control responsive to vehicle motion.

SEE OR SEARCH CLASS:
417, Pumps, subclass 231 for a vehicle operated pump or compressor.
454, Ventilation, 69 for a vehicle ventilating system.

This subclass is indented under subclass 241. Apparatus relating to an axle of the vehicle.

This subclass is indented under subclass 239. Apparatus in which there is a common power supply for the vehicle and a refrigeration apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:
7 for processes and apparatus utilizing refrigerant as a fuel.

This subclass is indented under subclass 239. Apparatus having features peculiar to a passenger or features accommodating the vehicle operator, e.g., seats, instrument panels, dashboards, luggage compartments, etc.

SEE OR SEARCH CLASS:
454, Ventilation, 69 for vehicle ventilation.

This subclass is indented under subclass 239. Apparatus having means to control the drip, splash, or disposal of the melt from a solid refrigerant.

SEE OR SEARCH THIS CLASS, SUBCLASS:
312 422+ and 459+, for other ice melt handling.

This subclass is indented under the class definition. Apparatus having structure forming a cooled compartment and including a feature, as a transparent panel, stepped shelves, or an air current across an opening which enhances the display of articles within the compartment.

SEE OR SEARCH THIS CLASS, SUBCLASS:
407 for an enclosure with a gas circulating feature.
440 for a cooled enclosure, particularly subclass 457, for a portable receptacle cooler, and subclass 458 for an open access cooled surface.

This subclass is indented under subclass 246. Apparatus having means to disperse or evaporate a liquid into the atmosphere of the display device.

SEE OR SEARCH THIS CLASS, SUBCLASS:
304 for another gas-liquid contact material cooling structure.

This subclass is indented under subclass 246. Apparatus having means to prevent or remove condensation of moisture in the ambient atmosphere on a transparent panel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
272 for condensation prevention or removal from another heat absorbing surface.

SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), 171.3 for a transparent panel with treating means, e.g., a condensation preventer, and see notes.

This subclass is indented under subclass 246. Apparatus in which the refrigerated display structure is combined with a device or structure having other functions, e.g., mirror, counter, waste collector.

SEE OR SEARCH THIS CLASS, SUBCLASS:
264 for a refrigerator with illuminating or radiant energy means.

This subclass is indented under subclass 246. Apparatus having means to move an article.

This subclass is indented under subclass 246. Apparatus having article support means or shelves arranged in superimposed offset relationship.

This subclass is indented under subclass 246. Apparatus having walls or partitions forming compartments for the cooling or storage or articles.

SEE OR SEARCH THIS CLASS, SUBCLASS:
417 for a plural compartment cooled enclosure having a gas controller.
441 for the structure of a plural compartment cooled enclosure.

This subclass is indented under subclass 252. Apparatus in which the walls are hollow, imperforate and cooled.

This subclass is indented under subclass 252. Apparatus comprising a nondisplay compartment for holding articles.

This subclass is indented under subclass 246. Apparatus including means for forcing, directing or controlling the flow of air within or relative to a cooled display compartment.

SEE OR SEARCH THIS CLASS, SUBCLASS:
265 for an enclosure access with air blocking means.
407 for an enclosure with cooled air or gas controlling or directing means.

This subclass is indented under subclass 255. Apparatus having means forming an elongated air inlet and outlet both of which extend substantially the length of a cabinet dimension so that a curtain stream of air is formed.

SEE OR SEARCH THIS CLASS, SUBCLASS:
413 for an enclosure having verging streams.

SEE OR SEARCH CLASS:
454, Ventilation, 188 for an air curtain of more general application.

This subclass is indented under subclass 246. Apparatus having cooling means cooling the floor of the display compartment.

SEE OR SEARCH THIS CLASS, SUBCLASS:
458 for an open access cooled surface.

This subclass is indented under the class definition. Apparatus having means forming a noncooled work surface, e.g., table, side board, cutting block.

SEE OR SEARCH THIS CLASS, SUBCLASS:
458 for a cooled open access article supporting surface.

STRUCTURAL INSTALLATION:
This subclass is indented under the class definition. Apparatus with (a) means performing an operation external to the subject matter of this class, (b) a static construction installation, (c) a particular geos:graphic feature, wherein there is included only so much structure foreign to Class 62 as to associate it with the apparatus of Class 62.
(1) Note. The following classes and subclasses are noted as including electrical devices and means for cooling them: Class 373, Industrial Electric Heating Furnaces, subclasses 76, 113, 158, and 165; Class 174, Electricity: Conductors and Insulators, subclasses 15.1+; Class 219, Electric Heating, subclasses 10.491+ and 120; Class 250, Radiant Energy, appropriate subclasses, especially subclass 238; Class 310, Electrical Generator or Motor Structure, subclasses 52+; Class 313, Electric Lamp and Discharge Devices, subclasses 11+ and 231.01; Class 314, Electric Lamp Discharge Devices: Consumable Electrodes, subclass 26; Class 315, Electric Lamp and Discharge Devices: Systems, subclasses 112+; Class 361, Electricity: Electrical Systems and Devices, appropriate subclasses, especially subclasses 676+ and 688; Class 336, Inductor Devices, subclasses 55+; and Class 338, Electrical Resistor, subclasses 53+.

SEE OR SEARCH THIS CLASS, SUBCLASS:
235 for skating rink.
235.1 for a system utilizing solar energy.
238.1 for disparate apparatus utilized as a heat source or absorber and see the notes thereto.
239 for cooling means with a vehicle body or traction feature.
258 for apparatus with a noncooled work surface.
440 for refrigeration means having a relationship to a cooled enclosure.

SEE OR SEARCH CLASS:
5, Beds, subclass 284 for a heating and cooling device combined with bed structure.
137, Fluid Handling, 343 for a fluid handling system of general application installed in extraneous structure.
165, Heat Exchange, 47 for structural installation of a heat exchanger not specialized to refrigeration.
184, Lubrication, 104.1 for a lubricator with heating or cooling means.
454, Ventilation, appropriate subclasses for ventilation of a building.

With electrical component cooling:
This subclass is indented under subclass 259.1. Apparatus in which an electrical apparatus is cooled by refrigeration means.
(1) Note. Cooling of a specific electrical means should be searched in the class where the means as such would be classified, e.g., Class 362, for illumination.

SEE OR SEARCH THIS CLASS, SUBCLASS:
418 for component cooling by utilizing a foraminous air distributor.
505 for motor cooling.
514 for Joule Thompson effect coolers.

SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 152 for cooling and/or fluid feeding.
361, Electricity: Electrical Systems and Devices, 688 for cooling means for electronic systems and devices.

With body applicator:
This subclass is indented under subclass 259.1. Apparatus in which there is provided a refrigeration means for cooling a living body or part thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:
293 for a hand-manipulable tool for applying cooling to a body, e.g., branding iron.
530 for an envelope type refrigerant cooler.

SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 46 for a flexible envelope body conforming heat exchanger.
607, Surgery: Light, Thermal, and Electrical Application, 96 for thermal applicators; and dig. 27 for cryogenic devices applicable to the body or body part.

With evaporative type cooler:
This subclass is indented under subclass 259.1. Apparatus in which cooling of air or an object takes place by the evaporation of water into air in an open system, e.g., roof coolers.
(1) Note. An open system is one which is not sealed from the atmosphere for operation at or substantially at atmospheric pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
121 for related processes.
304 for material cooling means including a gas-liquid contactor.

SEE OR SEARCH CLASS:
261, Gas and Liquid Contact Apparatus, appropriate subclasses for gas-liquid contact apparatus.

This subclass is indented under subclass 259. Apparatus in which a part is arranged relative to the earth, e.g., subterranean.

SEE OR SEARCH THIS CLASS, SUBCLASS:
324 for a reversible heat pump organization.

SEE OR SEARCH CLASS:
137, Fluid Handling, 363 for ground supported fluid handling means.
165, Heat Exchange, subclass 45 for a heat exchanger not specialized to refrigeration having a geos:graphical feature.

This subclass is indented under subclass 259. Apparatus in which the cooling means is structurally related to an article of furniture.

SEE OR SEARCH CLASS:
5, Beds, subclass 284 and 423 for a bed or a mattress which may include heat exchange means.
454, Ventilation, subclass 197 for a window ventilated bed or couch.

This subclass is indented under subclass 259. Apparatus including mounting or connecting means related to a wall aperture, e.g., a window.

SEE OR SEARCH THIS CLASS, SUBCLASS:
297 for an external support for a refrigerator housing.
426 for a cooler unit with gas forcing means.

SEE OR SEARCH CLASS:
248, Supports, 208 for a window mounted or attached bracket, per se.
454, Ventilation, 201 for a nominally recited window mounted air conditioner type air pump.

This subclass is indented under subclass 259. Apparatus mounting a cooling unit on a vertical wall or partition of a building which wall has functions other than merely forming the enclosure to be cooled.

SEE OR SEARCH CLASS:
312, Supports: Cabinet Structure, subclass 242 and 245+ for a cabinet mounted in or on a vertical wall.

This subclass is indented under the class definition. Apparatus with means to illuminate it or subject it to a particular radiant energy means other than mere heating or cooling.

SEE OR SEARCH THIS CLASS, SUBCLASS:
249 for a display cabinet with features extraneous to the cabinet or cooler.

SEE OR SEARCH CLASS:
312, Supports: Cabinet Structure, subclass 223.5 for an illuminated cabinet of general utility.
362, Illumination, 127 for a light and furniture combination of general application.

This subclass is indented under the class definition. Apparatus including a cooled compartment with an access and means blocking air flow or means resulting in disabling of
air blocking means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
255 for a display cabinet with air controlling or directing means.
267 for interlocked diverse function elements.

This subclass is indented under subclass 265. Apparatus with an article handling means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
378 for an article conveyor or transporter in general.

This subclass is indented under the class definition. Apparatus having diverse functions which are correlated for conjoint control in such a manner that the action of one means is prerequisite to the action of another in a desired sequence or the action of one precludes the action of another.

SEE OR SEARCH THIS CLASS, SUBCLASS:
231 for a timed or programmed actuator.

SEE OR SEARCH CLASS:
109, Safes, Bank Protection, or a Related Device, subclass 63.5 for an enclosure with means for rendering its closure lock ineffective, e.g., safety means allowing exit of a person with the enclosure.

This subclass is indented under the class definition. Apparatus in which a chamber is placed under a subatmospheric temperature by removing of vapor of a liquid within the chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
100 for related processes.
123 for means separating a solidified constituent of a liquid mixture.
169 for similar apparatus with automatic control.

SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 75, 92, and 402+ for similar apparatus and related processes where the primary function is that of drying.
159, Concentrating Evaporators, 22 for a closed chamber type evaporator.
417, Pumps, 151 for jet type pump, per se.

This subclass is indented under subclass 268. Apparatus in which a hydroscopic agent is used to aid in creating the vacuum.

SEE OR SEARCH THIS CLASS, SUBCLASS:
94 for processes of circulating external gas with removal of gas.
271 for atmosphere and sorbent contact.

This subclass is indented under subclass 268. Apparatus comprising elements having different functions in producing a vacuum with or without fluid handling.

This subclass is indented under the class definition. Apparatus supporting or handling a sorbent and means to cause contact of the atmosphere, the sorbent acting to remove a constituent, usually moisture, from the atmosphere
therewith.
(1) Note. If the sorbent is a liquid, means to regenerate is included.

SEE OR SEARCH THIS CLASS, SUBCLASS:
93 for related processes.
269 for a vacuumized chamber with asorbent.
304 for means contacting a liquid with atmosphere even though the liquid be a brine.
317 for an external fluid clarifier.
474 for a refrigerant purifier.

SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, 108 for solid sorbent apparatus, per se, and subclasses 243+ for gas separation apparatus combined with gas and liquid contact means.

This subclass is indented under the class definition. Apparatus having means to remove or prevent the deposition of moisture condensed from the atmosphere on the surface of a heat absorbing surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:
92 and 93, for processes involving removal of moisture from a circulating gas.
312 for an ice melt-gas contactor.
324 for a reversible cycle heat pump.
353 for a heat absorbing member with means to remove a congealed product therefrom.
401 for an air compressing, cooling and expanding system which may remove condensate from the compressed, heated air.
432 and 441+, for a refrigerator with plural compartments which may be insulated from each other in which the insulation may act to prevent condensation on a compartment wall.
460 for a device which removes ice melt together with atmospheric condensate deposited on the ice.

SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), 171.3 for a transparent panel with treating means, e.g., a condensation preventer and see notes.

This subclass is indented under subclass 272. Apparatus which operates to prevent condensation within, or to remove condensation from, the interior of an insulated wall or partition.

SEE OR SEARCH THIS CLASS, SUBCLASS:
385 for means directing sublimed refrigerant gas into insulation or a hollow wall.

This subclass is indented under subclass 272. Apparatus in which there is means supplying a cooled space with moisture from outside the space.

SEE OR SEARCH THIS CLASS, SUBCLASS:
91 for processes of circulating an external gas.
171 for automatic control of a gas-liquid contact cooler.
176 for a humidity sensor.

This subclass is indented under subclass 272. Apparatus aided by heating means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
349 for similar apparatus used to release a congealed product from a heating absorbing element.

SEE OR SEARCH CLASS:
219, Electric Heating, subclass 538 for electrical heaters, per se, some of which may be used for defrosting.

This subclass is indented under subclass 275. Apparatus in which the heater is positioned so as to contact, or to be adjacent to, the surface of a principal heat absorber of the refrigeration apparatus, e.g., evaporator.

This subclass is indented under subclass 272. Apparatus which includes a portion of a refrigeration apparatus which develops heat.

SEE OR SEARCH THIS CLASS, SUBCLASS:
81 for related processes.
238 for means utilizing rejected heat in a disparate apparatus.
352 for similar structure designed to release a congealed product from a heat absorbing surface.

This subclass is indented under subclass 277. Apparatus in which means is provided for by-passing certain of the elements, or reversing flow of internal fluid through the refrigeration producing apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:
159 for automatic control of selective heating or cooling means.
196 for automatic control of evaporator or condenser by-pass.
513 for heat exchange means between diverse function elements.
525 for serially arranged evaporators, one of which may be a
re-evaporating coil.

This subclass is indented under subclass 277. Apparatus for conducting atmospheric condensate from the heat absorbing portion of a refrigeration producer to a position wherein it absorbs heat from a heat liberating portion.

SEE OR SEARCH THIS CLASS, SUBCLASS:
305 for a gas-liquid contactor utilized to cool a heat rejector of a refrigeration producer.

This subclass is indented under subclass 279. Apparatus including a pump or means throwing the condensate, e.g., slingers.

This subclass is indented under subclass 272. Apparatus comprising a member, e.g., a wick, positioned to receive atmospheric condensate and diffuse it into the atmosphere.

SEE OR SEARCH THIS CLASS, SUBCLASS:
315 and 316, for a porous wall or porous cover member gas-liquid contact material cooler.

This subclass is indented under subclass 272. Apparatus with means for applying a fluid, e.g., air or brine, to the surface of the heat absorber, so as to inhibit the formation of or remove condensate from said heat absorber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
82 for related processes.

This subclass is indented under subclass 272. Apparatus in which means separate and distinct from the principal heat absorber is so arranged that atmospheric condensate tends to collect upon said means in lieu of on the principal heat absorber.
(1) Note. Such means may be the heat absorbing portion of a refrigeration producing apparatus wherein its primary function is to cause atmospheric condensation, the primary cooling function being left to other heat absorbing apparatus.

This subclass is indented under subclass 272. Apparatus in which there is a device so constructed that upon movement relative to the heat absorber of a refrigeration apparatus, atmospheric condensate upon the heat absorber is removed therefrom.

SEE OR SEARCH THIS CLASS, SUBCLASS:
303 for cleaning means for refrigeration apparatus.
345 347 and 354, for means scraping a congealed product from a heat absorbing element.

This subclass is indented under subclass 272. Apparatus in which means is provided for retaining all or part of the atmospheric condensate after removal thereof from the heat absorbing surface, or for directing flow of such condensate.

This subclass is indented under subclass 285. Apparatus adjustable with respect to other parts of the apparatus or
positioned with respect to another retainer or flow director in such a manner that it may be removed from the apparatus, the other retainer or flow director then accommodating the atmospheric condensate.

This subclass is indented under subclass 285. Apparatus in which the flow directing means includes an inner surface of a wall defining the space being refrigerated.
(1) Note. The atmospheric condensate is usually caused to flow along said wall in order that a portion thereof may evaporate within said space.

SEE OR SEARCH THIS CLASS, SUBCLASS:
312 for an ice holder and ice melt-gas contacting means.
451 for a cooled wall type refrigerator cabinet.

This subclass is indented under subclass 285. Apparatus directing condensate into means accumulating the condensate.

This subclass is indented under subclass 288. Apparatus in which the accumulating means is located outside of the space being refrigerated.

This subclass is indented under subclass 285. Apparatus in which plural distinct flow directors for atmospheric condensate act in parallel.

This subclass is indented under subclass 285. Apparatus in which means, e.g., pan or tray, is provided for accumulating at least some part of the atmospheric condensate after its removal from the heat absorbing surface.

This subclass is indented under the class definition. Apparatus with means for introducing a material, usually a refrigerating fluid, into a closed circuit from a source external of the circuit, means to provide the refrigerant, to replace a lost portion or to replace one component with another.

SEE OR SEARCH THIS CLASS, SUBCLASS:
77 for related processes.
149 for automatically adding or withdrawing refrigerant relative to a closed system.

SEE OR SEARCH CLASS:
141, Fluent Material Handling, With Receiver or Receiver Coacting Means, appropriate subclass for means for transferring a fluid to a receiver of general utility.

This subclass is indented under the class definition. Apparatus including a portable cooling device having means for manually manipulating it for contact with a material to be cooled.

SEE OR SEARCH THIS CLASS, SUBCLASS:
530 for an envelope type refrigerant or coolant handling device.

SEE OR SEARCH CLASS:
138, Pipes and Tubular Conduits, subclass 35 for portable pipe thawing apparatus, and subclasses 97+ for pipe repair means including freezing means.

This subclass is indented under the class definition. Apparatus including a fluid reservoir having fluid liberating means of the cutter or punch type.

SEE OR SEARCH THIS CLASS, SUBCLASS:
4 for processes and apparatus involving cooling by chemical reaction or dissolving wherein a container may be punctured.
293 for hand manipulable cooling tools.

SEE OR SEARCH CLASS:
137, Fluid Handling, 317 for fluid handling of general application involving tapping a pipe, keg or tank.
222, Dispensing, 80 for a dispenser with a cutter or punch.

This subclass is indented under the class definition. Apparatus having resilient supporting means for a power input means and/or heat rejecting element of a refrigeration producing system.

SEE OR SEARCH THIS CLASS, SUBCLASS:
466 for a resilient support for an element inside of a cooled enclosure.

SEE OR SEARCH CLASS:
248, Supports, 560 for a resilient support in general.
417, Pumps, subclass 363 for a resiliently mounted motor driven pump.

This subclass is indented under the class definition. Apparatus including a device for attenuating sound.

SEE OR SEARCH THIS CLASS, SUBCLASS:
295 for a resiliently mounted power or heat rejector.

SEE OR SEARCH CLASS:
181, Acoustics, 212 for a muffler or sound deadener, per se.
417, Pumps, subclass 312 for a pump or compressor combined with a muffler acting on the fluid handled by the pump.

This subclass is indented under the class definition. Apparatus including a device external of and supporting a refrigerator housing.

SEE OR SEARCH THIS CLASS, SUBCLASS:
239 for refrigerating means with vehicle body structure or traction feature.
295 for a resiliently supported power or heat rejecting element.

SEE OR SEARCH CLASS:
248, Supports, 127 for a stand support, per se.
312, Supports: Cabinet Structure, 249.1 and 351.1+ for a cabinet with an external support.

This subclass is indented under the class definition. Apparatus including means for repairing, removing, replacing or aiding in assembling or removing an element of a refrigeration assembly other than the parts making up the refrigeration assembly which could be removed by merely disconnecting a part, e.g., pipe joints, including means to break loose and remove a product (ice) mold from its support.

SEE OR SEARCH THIS CLASS, SUBCLASS:
77 for related processes, and see the Notes thereto.
326 for convertible structure which may be disassembled for conversion to another structure or for storage of the disassembled structure.
340 for means for removing a product from product forming means.

This subclass is indented under subclass 298. Apparatus including a pipe coupling and valve means controlling flow through the coupling.

This subclass is indented under subclass 298. Apparatus having means coacting between a mold and its support for releasing the mold from the support.

SEE OR SEARCH THIS CLASS, SUBCLASS:
349 for a mold with a heater for removing the product from the mold.

This subclass is indented under subclass 300. Apparatus including means for releasing a grid or molded congealed product (ice) from a tray.

SEE OR SEARCH THIS CLASS, SUBCLASS:
359 particularly subclasses 362 and 364, for ice trays with cube release means.

This subclass is indented under subclass 298. Apparatus including means on which the element to be removed slides or rolls.

SEE OR SEARCH THIS CLASS, SUBCLASS:
382 for a drawer, tray or track guided type of receptacle in
cooling compartment.

This subclass is indented under the class definition. Apparatus having means for cleaning or facilitating the cleaning of a part of a cooling apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:
272 for atmospheric condensate removal means, particularly subclass 284 for a wiper for atmospheric condensate.
298 for repair, assembly or disassembly means.
317 for a separating clarifier for nonrefrigerant fluids.
322 for disparate serially arranged apparatus, and other means treating a product, e.g., cleaning and cooling a product.
340 for a cooler with congealed product removal means.
474 for a refrigerant producer having refrigerant purifying means.

SEE OR SEARCH CLASS:
137, Fluid Handling, 238 for a fluid handling system combined with cleaning means.

This subclass is indented under the class definition. Apparatus including (1) means for directing, confining, supporting or handling a material to be cooled combined with means promoting contact of a liquid with, or evaporating the liquid into, an atmosphere (usually air), or (2) means for contacting or injecting a gas into a confined body of liquid combined with means for cooling the liquid and gas in contact.

SEE OR SEARCH THIS CLASS, SUBCLASS:
91 and 121, for related processes.
171 for a gas-liquid contact cooler with automatic control.
247 for display type with gas and liquid contacting means.
271 for sorbent and atmosphere contacting type cooling apparatus.
274 279 or 281, for atmospheric condensate removal which may involve gas and liquid contact.
476 particularly subclass 490, for a sorbent type refrigeration producer which may use an inert gas contacting the refrigerant or sorber.
502 for a compressor-condenser-evaporator refrigeration producer utilizing diverse fluids.

SEE OR SEARCH CLASS:
261, Gas and Liquid Contact Apparatus, 127 for a gas and liquid contactor and heat exchanger wherein all of the gas and liquid mingle.

This subclass is indented under subclass 304. Apparatus dispersing or evaporating liquid into air to cool a heat rejecting part of the system.

SEE OR SEARCH THIS CLASS, SUBCLASS:
279 where the liquid is atmospheric condensate.
314 through 316 for gas-liquid contacting means indirectly cooling a fluid confining means.
428 for an air cooler with means for cooling a heat rejector, and see the Note thereto.

This subclass is indented under subclass 304. Apparatus including means to feed a gas into a tank or flow line containing a liquid which is pressurized by the gas, e.g., carbonating means or means to displace liquid by a gas under pressure.

SEE OR SEARCH CLASS:
137, Fluid Handling, 154 for a diverse fluid containing pressure system of a more general application.
261, Gas and Liquid Contact Apparatus, subclass 140 for a refrigerated contact device, and subclass 153 for a heated or cooled gas exposed body of liquid.

This subclass is indented under subclass 304. Apparatus including a gas inlet submerged in a body of liquid.

SEE OR SEARCH CLASS:
261, Gas and Liquid Contact Apparatus, 121 for such device wherein a gas is injected into a body of liquid but having no means for cooling the liquid container or features peculiar to the manufacture of a congealed product (ice), and subclass 153 for a heated or cooled container for a gas exposed liquid body.

This subclass is indented under subclass 307. Apparatus wherein the gas inlet is a pipe suspended through an open top of a receptacle containing the liquid.

This subclass is indented under subclass 304. Apparatus comprising means forcing or directing gas relative to the contactor and a related enclosure in such a manner that at least a portion of the gas is recirculated.

This subclass is indented under subclass 304. Apparatus having means for recirculating a contacting fluid, usually the liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
309 for an apparatus in which the gas is recirculated relative to the enclosure.

This subclass is indented under subclass 304. Apparatus with means for treating the material being cooled or for treating the contacting gas or liquid, usually a second cooling means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
309 and 310, for a system in which the gas or liquid is recirculated relative to a cooled enclosure and treated by a gas-liquid contactor and heat exchanger (cooler).
332 for other diverse refrigeration producers.

This subclass is indented under subclass 311. Apparatus comprising an ice holder and means for dispersing ice melt or drip into contact with the atmosphere internally or externally of a cooled enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
421 for an air cooler including a foraminous wall ice container wherein there may be incidental contact of air with ice melt escaping through the for amina.

This subclass is indented under subclass 312. Apparatus in which there is means forming a flue extending in a substantially vertical direction through which both air and ice-melt pass while in contact with each other.

SEE OR SEARCH THIS CLASS, SUBCLASS:
420 wherein such passages may be present but there is no means enhancing gas-melt contact.

This subclass is indented under subclass 304. Apparatus having gas forcing means for directing the gas in a desired flow path relative to the gas-liquid contacting means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
305 for similar structure forcing or directing gas over a heat rejector of a refrigeration producer.
309 for similar structure including recirculation of the gas.

This subclass is indented under subclass 304. Apparatus having a porous wall liquid confining container or flow line, e.g., ollas.

SEE OR SEARCH CLASS:
312, Supports: Cabinet Structure, 31 for a container wherein the evaporated vapor contacts material within the container.

This subclass is indented under subclass 304. Apparatus comprising a porous cover member for an impervious wall of a container.

SEE OR SEARCH THIS CLASS, SUBCLASS:
315 for a porous wall liquid container or flow line.

This subclass is indented under the class definition. Apparatus having a filter or gravitational separator for fluid cooled by refrigeration means, e.g., a filter for brine, ice-melt, or cooled fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
123 for means separating a constituent from a mixture of two or more substances by cooling.
271 for means contacting atmosphere with sorbent means.
304 for a separation-clarifier and gas-liquid contact type cooling means.
474 for a purifier for refrigerant flowing in a refrigeration producer.

SEE OR SEARCH CLASS:
137, Fluid Handling, 544 for fluid handling of general application with separating means.

This subclass is indented under subclass 317. Apparatus wherein the fluid is a liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
67 for congelation processes involving filtering or gravitational separation.
272 for atmospheric condensate handling means.

SEE OR SEARCH CLASS:
210, Liquid Purification or Separation, appropriate subclass, for processes and apparatus for separating liquids of more general utility.

This subclass is indented under subclass 318. Apparatus in which the liquid is prevented from contacting the coolant or from contacting a material (e.g., ice melt) which has served as a coolant.

This subclass is indented under the class definition. Apparatus including means dividing a solid congealed mass
into a number of smaller solid pieces.

SEE OR SEARCH THIS CLASS, SUBCLASS:
340 particularly subclasses 345+ and 353 for a congealed product maker with a product remover, which remover may incidentally cause disintegration of the removed product.

SEE OR SEARCH CLASS:
30, Cutlery, 136 and 140 for hand manipulable means to form ice cubes from an ice block, and subclasses 164.5+ for an ice pick.
33, Geometrical Instruments, 18.1 for means to score a block of ice, especially subclass 45 for a machine with plural scrubbing means.
83, Cutting, appropriate subclass, especially 879 for scoring and 170 for a heated cutting tool and saws of general utility.
219, Electric Heating, appropriate subclasses for an electric heater which may be used to sever ice blocks.
241, Solid Material Comminution or Disintegration, appropriate subclass for a comminutor of more general application and see the reference to Class 62 under SEARCH CLASS in section 5 of the class definition of Class 241.

This subclass is indented under subclass 320. Apparatus including means for utilizing the subdivided product, e.g., in an ice cream freezer or railway car.

SEE OR SEARCH CLASS:
241, Solid Material Comminution or Disintegration, appropriate subclass, particularly subclass 100 for a comminutor and receiver of general utility.

This subclass is indented under the class definition. Apparatus in which in addition to cooling or refrigeration apparatus and means auxiliary to its operation, e.g., agitator, conveyor, or coolant circulator, there is other distinct apparatus for performing a nonrefrigeration treating
operation on the product cooled or product to be cooled, e.g., crushing, wrapping, compressing, which cooling and other apparatus is arranged for sequential operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
60 for cooling processes involving packaging.
62 for article treating processes.
123 and 532+, for subject matter involving cooling and thawing a frozen constituent.
317 for separating-clarifying means for treating an internal fluid combined with cooling apparatus.

WITH INTERNAL-COMBUSTION ENGINE:
This subclass is indented under the class definition. Apparatus including an internal-combustion engine.

SEE OR SEARCH THIS CLASS, SUBCLASS:
7 for subject matter wherein a refrigerant is utilized as a fuel.
239 for vehicle feature combinations and see the notes.

SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, subclass 41.19 for an internal-combustion engine cooled by a refrigeration cycle.

With cooling apparatus other than gas compressor:
This subclass is indented under subclass 323.1. Apparatus in which there is provided a refrigeration system having a working fluid cycle not requiring the use of a gas compressor.
(1) Note. Included herein are sorption and thermoelectric systems, but not included are Stirling cycle, jet pump, and air cycle systems.

SEE OR SEARCH THIS CLASS, SUBCLASS:
101 238.3 and 476+, for sorption systems.
235.1 for a thermoelectric cycle in which solar energy is
used.
324.2 for similar systems having a reversing mode or operation.

With electric motor drive:
This subclass is indented under subclass 323.1. Apparatus in which at least one refrigerant compressor is driven at least part of the time by an electrically energized motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:
228.2 for automatic control of compressor drive motors.
236 for alternate compressor drives.

SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, appropriate subclasses for specific motor controls.

With clutch or variable speed transmission controlling compressor drive:
This subclass is indented under subclass 323.1. Apparatus in which drive means to operate a refrigerant compressor comprises either (a) a drive engaging or disengaging means, or (b) a drive speed varying means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
133 for automatic control responsive to vehicle body motion, e.g., the compressor is declutched at low engine speeds.
228.2 for automatic speed control of a compressor drive.

SEE OR SEARCH CLASS:
192, Clutches and Power-Stop Control, for clutch details.
417, Pumps, appropriate subclasses for pumps of general utility, and especially subclass 364 for pumps driven by an internal combustion motor.

REVERSIBLE, I.E., HEAT PUMP:
This subclass is indented under the class definition. Apparatus in which there is means to reverse flow through a refrigeration cycle or parts thereof so as to reverse the functions of the heat absorbing or rejecting means, or there is means to change the flow direction of an external fluid (air) so that it may be selectively heated or cooled.

SEE OR SEARCH THIS CLASS, SUBCLASS:
80 for processes of defrosting.
154 for automatic control of defrosting.
160 for reversible heat pump with automatic control.
238.1 for related combinations wherein the rejected heat may be utilized in a disparate apparatus, e.g., hot water producer.
260 for a refrigerator including subterranean features.
278 for reversible heat pump acting to remove atmosphere condensate, e.g., defrost.

SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 62 for combined heating and cooling by a modifiable refrigerating system.

With cooling apparatus other than gas compressor:
This subclass is indented under subclass 324.1. Apparatus in which there is provided a refrigeration system having a working fluid cycle not requiring the use of a gas compressor.
(1) Note. Included herein are sorption and thermoelectric systems, but not included are Stirling cycle, jet pump, and air cycle systems.

SEE OR SEARCH THIS CLASS, SUBCLASS:
101 238.3 and 476+, for sorption systems.
235.1 for a thermoelectric cycle in which solar energy is used.
323.2 for similar systems associated with an internal-combustion engine.

With product treatment:
This subclass is indented under subclass 324.1. Apparatus in which a solid or liquid product is subjected to heating and/or cooling by a refrigeration system, e.g., drying, freeze separation, congelation, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:
66 and 340+, for congelation.
123 for apparatus of freeze separation.
532 for processes of freeze separation.

SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, appropriate subclasses.

With refrigerant collection and intermittent discharge:
This subclass is indented under subclass 324.1. Apparatus in which means is provided for temporarily capturing part of the refrigerating fluid and subsequently releasing of it at recurring intervals discrete portions back into the refrigeration system.

SEE OR SEARCH THIS CLASS, SUBCLASS:
174 for automatic control of trapping and of discharging refrigerant batches.

With atmospheric condensate removal or prevention:
This subclass is indented under subclass 324.1. Apparatus in which there is provided structure to either eradicate or prohibit the deposition of moisture condensed from the atmosphere on a heat absorbing surface of a refrigeration system.

SEE OR SEARCH THIS CLASS, SUBCLASS:
272 for details of atmospheric condensate preventing or handling.

With flow control or compressor details:
This subclass is indented under subclass 324.1. Apparatus wherein significance is attributable to particular fluid regulation or compressor structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
511 for fluid restrictors.
528 for adjustable controllers.

SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 625.43 for reversing valve details.
417, Pumps, appropriate subclasses for compressor details.

This subclass is indented under subclass 324. Apparatus in which the direction of flow of an external fluid can be reversed relative to the heat absorbing and rejecting means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
428 for a refrigeration producer means circulating gas over the heat rejector.

This subclass is indented under the class definition. Apparatus including means whereby mode or condition of operation or use can be changed by shifting or rearranging all or some of the parts in a different relationship to each other or by addition or omission of a part.

SEE OR SEARCH THIS CLASS, SUBCLASS:
286 for an adjustable position or selectively usable retainer or a flow director for atmospheric condensate.
298 for apparatus having means aiding in assembling, or disassembling.
324 for a reversible cycle machine.

This subclass is indented under subclass 326. Apparatus in which the ice storage capacity of an ice bunker can be readily increased or decreased.

SEE OR SEARCH CLASS:
105, Railway Rolling Stock, subclass 369 for a freight car with a load support, subclass 375 for floor structure, or subclass 376 for removable partitions.

This subclass is indented under subclass 327. Apparatus in which an ice bunker wall is movable to a stored position against the end wall, side wall or ceiling of the cooled enclosure.

This subclass is indented under subclass 326. Apparatus in which a cooled enclosure is provided with a partition so mounted that it may be removed, relocated, or shifted to a nonplural compartment forming position.

SEE OR SEARCH THIS CLASS, SUBCLASS:
327 for a storable or variable capacity ice bunker.
465 for a particular internal element support, e.g., and adjustable foraminous shelf.

This subclass is indented under the class definition. Apparatus including means to manufacture a refrigerant or coolant as a removable and disposable product and including
means utilizing the manufactured disposable product as a refrigerant or coolant, e.g., brine and ice mixture making and space cooler.

SEE OR SEARCH THIS CLASS, SUBCLASS:
76 for related processes.
321 for an ice maker and comminutor and means utilizing the product.
340 for ice making apparatus, per se.

SEE OR SEARCH CLASS:
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, 261 for solution making apparatus, e.g., brine, etc.

This subclass is indented under the class definition. Apparatus not provided for above comprising a device in addition to or combined with refrigerator structure, having a function other than refrigeration or serving to perfect such apparatus for its intended primary purpose.

SEE OR SEARCH CLASS:
2, Apparel, appropriate subclass for a heat covering with treatment means there provided for.
165, Heat Exchange, subclass 58 for a combined heating and cooling system. See the statement under Search Class 62 in the definition of subclass 58 of Class 165 for a statement of the line between Classes 62 and 165 as to this subject matter.

This subclass is indented under the class definition. Apparatus having (1) two or more change of material phase producing closed circuits each having a different manner of operation, e.g., a primary compressor-condenser-expander circuit combined with a secondary condenser-evaporator circuit; a still-condenser-expander circuit combined with a compressor-condenser-expander-circuit, (2) change of phase closed circuits cooling one treating zone combined with cooling means using a solid or liquid which by change of
phase cools another treating zone, or (3) apparatus having confining means each supporting or confining refrigerants or coolants of different kinds, e.g., water, ice and dry ice.

SEE OR SEARCH THIS CLASS, SUBCLASS:
79 for processes involving exchange of heat between plural systems.
175 for automatic control of diverse, cascade or compound systems.
311 for gas and liquid contact cooling means combined with other cooling means.
335 for a plural paired system and see the Notes thereto.

This subclass is indented under subclass 332. Apparatus having a primary (energy source circuit) refrigeration producing means which includes a flow line for a phase changing refrigerant and a secondary refrigeration producing means confining a phase changing refrigerant, said secondary system including only heat rejecting and absorbing parts and/or a restrictor, said primary and secondary means being isolated from and having at least one part of each in heat exchanging relationship with another.

This subclass is indented under subclass 333. Apparatus in which the evaporator of the secondary dependent circuit is in heat exchange relationship with the inner liner of a storage compartment, e.g., those which form a so-called two zone cold wall type.

SEE OR SEARCH THIS CLASS, SUBCLASS:
395 for an evaporator between insulation and a cooled liquid container.
438 for an intermediate fluid container forming a cooled storage compartment.
451 for a cooled compartment in which the coolant holding or guiding means is within a hollow wall.

This subclass is indented under the class definition. Apparatus in which there are multiples of two or more diverse function elements of a refrigeration producing system.

SEE OR SEARCH THIS CLASS, SUBCLASS:
79 for processes involving exchange of heat between plural systems.
144 for duplicate automatically controlled intermittently and alternately operation sorption systems.
332 for diverse refrigeration systems and see the Notes thereto.
337 for a heat exchanger between a space cooler and an isolated material handler.
467 particularly subclasses 504 or 513, for a refrigeration system which may include two or more similar function elements, e.g., plural evaporators.

This subclass is indented under the class definition. Apparatus in which there are material handlers of diverse types.

This subclass is indented under the class definition. Apparatus having means forming a first cooling compartment for material combined with a second cooling compartment for second material, said second compartment being isolated from said first compartment and having (1) means for treating the second material other than by cooling, or (2) means removing the second material from its compartment.
(1) Note. The heating or moving means may be an agitator, a dispenser, blower, pump or conveyor.

SEE OR SEARCH THIS CLASS, SUBCLASS:
336 for material handling means of diverse types.

This subclass is indented under subclass 337. Apparatus in which the material handling means is a liquid container or flow line within the article cooling compartment.

SEE OR SEARCH THIS CLASS, SUBCLASS:
389 for a withdrawable liquid cooler.

SEE OR SEARCH CLASS:
222, Dispensing, subclass 146 for a dispenser with heating or cooling means of general application, and subclasses 173+ for fluid dispensing means with a casing or support.

This subclass is indented under subclass 338. Apparatus in which the cooled liquid container has an inlet flow line connected to an external source, e.g., city water supply.

This subclass is indented under the class definition. Apparatus comprising means to shape or retain the shape of material being congealed, congealing means with means to release material congealed thereon, or means to modify the consistency of material being congealed by the working thereof (e.g., whipping) during congelation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
66 for related processes.
123 for a separator for a solidified constituent of a liquid mixture.
135 for product responsive means to produce a congealed product.
307 for means to inject a gas combined with an ice or ice cream maker.
317 for a separator-clarifier combined with a congealed product maker.
320 for a comminutor combined with a congealed product maker.
322 for a disparate treater serially arranged with product cooling means.
324 for a reversible heat pump which may thaw a product mold.
373 for liquid contacting a distinct removable receptacle, e.g., ice can.
440 for means for cooling a mere container.

SEE OR SEARCH CLASS:
30, Cutlery, subclass 140 for hand manipulable cutting means to form ice cubes from an ice block, and subclass 164.5 for an ice pick.
83, Cutting, appropriate subclasses for devices for cutting ice blocks through thicknesswise.
249, Static Molds, 69 and 129+ for ice cube trays not combined with means to congeal the fluent material to form the ice cube.
299, Mining or In Situ Disintegration of Hard Material, 24 for a device for working naturally occurring ice in situ, and including machines and cutters to form blocks of ice for recovery.
426, Food or Edible Material: Processes, Compositions, and Products, appropriate subclasses for frozen food products and processes of preparing same.

This subclass is indented under subclass 340. Apparatus including means compressing an article, e.g., food package, during the freezing thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:
60 for processes involving packaging.
75 for sequential stage congelation processes.

SEE OR SEARCH CLASS:
100, Presses, appropriate subclass for pressing processes and apparatus of general application.
156, Adhesive Bonding and Miscellaneous Chemical Manufacture, subclass 80 for laminating processes involving a step of refrigeration or freezing and subclass 498 for laminating devices with article cooling means.
264, Plastic and Nonmetallic Article Shaping or Treating: Processes, for shaping or molding processes within the class definition which may include the mere compacting of ice. subclass 28 therein includes the step of cooling and/or freezing to a temperature of zero deg.C and subclasses 109+ pertains to forming of articles by uniting of discrete bulk assembled particles. Subclasses 237 and 348 include cooling steps.
425, Plastic Article or Earthenware Shaping or Treating: Apparatus, appropriate subclasses for molding apparatus, per se, for shaping particulate ice or dry ice.

This subclass is indented under subclass 340. Apparatus including means to modify the consistency of a material being frozen, e.g., beater.

SEE OR SEARCH THIS CLASS, SUBCLASS:
8 for a solidified gas producer or former.
66 for related processes.
135 for control means responsive to congelation product condition.
136 for change of consistency sensing.
307 for freezing means combined with a submerged gas inlet.
337 for a freezer and agitator combined with a storage compartment.

SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 94 for a heat exchanger of general application having a scraper removing a product and subclass 109.1 for one having a stirrer or agitator.
366, Agitating, 69 and 241+ for a beater type agitator.

This subclass is indented under subclass 342. Apparatus including blades having diverse structure, e.g., beater and scraper.

This subclass is indented under subclass 340. Apparatus including product receiving and storing means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
67 for processes involving packaging.
379 for solid refrigerant handling.
529 for refrigerant handling or storing, per se.

This subclass is indented under subclass 340. Apparatus including means for movably supporting a freezing surface during freezing.

SEE OR SEARCH THIS CLASS, SUBCLASS:
341 for a press type moving freezing surface.

SEE OR SEARCH CLASS:
15, Brushing, Scrubbing, and General Cleaning, subclass 256.5 for a moving surface scraper wiper or brush where the surface means is of general application.
165, Heat Exchange, 86 for a movable heat exchange surface not specialized by structure to refrigeration.

This subclass is indented under subclass 345. Apparatus wherein the freezing surface is a rotating drum.

This subclass is indented under subclass 340. Apparatus including means to project, e.g., spray, raw material onto a freezing surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:
74 for related processes.
268 for a vacuumized chamber type cooler in which the material cooled may be sprayed.

SEE OR SEARCH CLASS:
159, Concentrating Evaporators, 3 for a spray type concentrating evaporator.
239, Fluid Sprinkling, Spraying, and Diffusing, appropriate subclasses for spraying means, per se.
425, Plastic Article or Earthenware Shaping or Treating: Apparatus, 6 particulate material maker comprising a liquid comminutor (e.g., spray, etc.) and means providing a congealing area.

This subclass is indented under subclass 340. Apparatus including means to cool the raw material prior to feeding it to the congelation product producer or means to remove the material being treated and return it back to the congelation means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
75 for related processes.

This subclass is indented under subclass 340. Apparatus including means to release the product by heating an adhering surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:
73 for related processes.
275 for preventing atmospheric condensate by an external heater.
277 for preventing or removing atmospheric condensate by a refrigeration producer.

SEE OR SEARCH CLASS:
414, Material or Article Handling, subclass 421 for a rotary cradle for dumping an ice block from an ice can, the cradle usually being provided with means to heat the can for releasing the ice block therefrom.

This subclass is indented under subclass 349. Apparatus attached to a hand manipulable mold, e.g., tray and grid ice cube former.

This subclass is indented under subclass 349. Apparatus including an electrical heating means.

SEE OR SEARCH CLASS:
219, Electric Heating, appropriate subclasses for an electrical heater of more general utility.

This subclass is indented under subclass 349. Apparatus including means utilizing a refrigerant as a heating means by-passing a condenser between the compressor and evaporator or comprising a heated coolant circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:
277 for similar structure utilized to prevent or remove atmospheric condensate from a heat absorbing surface.
324 for a reversible cycle heat.

This subclass is indented under subclass 340. Apparatus including means absorbing heat from a surface with means for removing a congealed product from said surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:
345 for moving surface congealing means often provided with a product remover, and see the Notes thereto.

SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 94 for a heat exchanger of general application provided with a scraper.

This subclass is indented under subclass 353. Apparatus wherein the product is removed by blade means moving adjacent the freezing surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:
284 for similar apparatus for preventing or removing atmospheric condensate from a heat absorbing member.

This subclass is indented under subclass 340. Apparatus provided with means for cooling the mold, e.g., an ice cream mold in a cold brine tank.

SEE OR SEARCH THIS CLASS, SUBCLASS:
300 for assembly and disassembly means releasing a mold from its support.
307 for a cooled tank with means to inject air.
440 for a cooled enclosure of more general application.

This subclass is indented under the class definition. Apparatus which forms a unit and comprises a portable container completely enclosing a commodity and/or coolant, the arrangement being such that the commodity must be removed to place or remove the coolant or vice versa or the unit must be destroyed as such when opened.
(1) Note. The commodity may be a coolant as in the case of packaged dry ice.

SEE OR SEARCH THIS CLASS, SUBCLASS:
1 for a product of refrigeration.
60 for processes including forming a package.
440 particularly subclass 457, for a refrigerator forming an enclosure even though portable.

SEE OR SEARCH CLASS:
43, Fishing, Trapping, and Vermin Destroying, 56 for a cooled minnow bucket.
217, Wooden Receptacles, especially 7 and 36+ for a compartmented crate of general utility.
220, Receptacles, 592.01 for a receptacle having means for maintaining its contents above or below ambient temperature.

This subclass is indented under subclass 371. Apparatus in which the commodity is cooled by a solid coolant and the commodity and coolant or their containers serve to position each other.

This subclass is indented under the class definition. Apparatus for directing, controlling or handling a liquid coolant so as to cause it to contact a discrete freely removable commodity the bottom of which merely rests on support means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
64 for related processes.
304 for a material cooler having means promoting contact of liquid with the atmosphere.
430 for an enclosure in which there is a tank provided with means circulating an intermediate fluid into contact with the exterior of the tank.

SEE OR SEARCH CLASS:
134, Cleaning and Liquid Contact With Solids, appropriate subclass, for apparatus contacting a liquid of general application. Class 62 takes cooling processes and apparatus specialized to refrigeration, e.g., particular refrigeration producing means or specific heat transfer structure.

This subclass is indented under subclass 373. Apparatus including means to transport or convey the article through a refrigeration zone.

SEE OR SEARCH THIS CLASS, SUBCLASS:
336 337, 340+, 377, and 378+, for other article handling combinations.

SEE OR SEARCH CLASS:
134, Cleaning and Liquid Contact With Solids, appropriate subclass, particularly 61 and 124+ for an article and liquid contact device with an article conveyor of more general application.

This subclass is indented under subclass 374. Apparatus in which the liquid coolant is recirculated in a determined path.

This subclass is indented under subclass 373. Apparatus in which the liquid coolant is recirculated in a determined path.

SEE OR SEARCH THIS CLASS, SUBCLASS:
310 for a gas-liquid contacting cooler with liquid recirculating means.
375 for article conveying or transporting with liquid recirculating means.

This subclass is indented under the class definition. Apparatus including an article holder mounted on a pivoted closure or a partition.

SEE OR SEARCH THIS CLASS, SUBCLASS:
266 for similar structure wherein there is air blocking means.

This subclass is indented under the class definition. Apparatus provided with means for guiding a freely supported discrete article to be cooled or a solid coolant with respect to treating zone, e.g., conveyor, dispenser, rack, track, guideway, or chute.

SEE OR SEARCH THIS CLASS, SUBCLASS:
250 for a display cabinet with an article handler.
266 for means providing access to a compartment and blocking air flow.
298 for assembling and disassembling means.
340 for a congealed product maker which may include a product conveyor.
374 for a similar organization with liquid contacting the article.
440 for a refrigerated enclosure provided with an article support, e.g., shelf.

SEE OR SEARCH CLASS:
53, Package Making, subclass 388 for package seam coolers.
187, Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle, appropriate subclass for elevator structure.
198, Conveyors: Power-Driven, appropriate subclass for conveyor structure.
214, Material or Article Handling, appropriate subclass, particularly subclass 16, for material handling of more general application.
221, Article Dispensing, subclass 150 for article dispensing apparatus with cooling or heating, of more general application.
312, Supports: Cabinet Structure, 294 for a cabinet with a movable component, e.g., drawer, tray or pivoted shelf.

This subclass is indented under subclass 378. Apparatus in which the article guided or conveyed is a solidified refrigerant, e.g., CO[subscrpt]2[end subscrpt] or water ice.

SEE OR SEARCH THIS CLASS, SUBCLASS:
529 for a refrigerant cooler or container.

This subclass is indented under subclass 378. Apparatus provided with a continuous conveyor, e.g., belt or chain.

SEE OR SEARCH THIS CLASS, SUBCLASS:
345 for endless conveyor means associated with means producing a shaped congealed product.

This subclass is indented under subclass 378. Apparatus mounted in such a manner that it is rotatable about a fixed
axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:
346 for a rotary drum material congealer.

This subclass is indented under subclass 378. Apparatus including a drawer, tray or other component movable in a horizontal direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:
302 for repair or assembly means sliding or rolling on guide means.

SEE OR SEARCH CLASS:
312, Supports: Cabinet Structure, 330.1 for a cabinet with a horizontally movable component, e.g., drawer.

This subclass is indented under the class definition. Apparatus including (1) a heat transmitting means, e.g., plate, (2) insulation means, or (3) heat absorbing means; which means are movable to vary the heat transmission between a cooling source and a cooled space, or (4) means to vary the flow of a fluid past a heat transmitting panel mounted in a contact with insulation means so as to vary heat transmission through the panel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
283 for removable moisture condensing means distinct from a principal heat absorber.

This subclass is indented under the class definition. Apparatus specific to the use of solidified gas, e.g., CO[subscrpt]2[end subscrpt], for cooling an enclosed space or having means to use the cooling effect in the treatment of fluid or solid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
165 for automatic control of means utilizing solidified gas.
601 for manufacturing of solidified gas.

This subclass is indented under subclass 384. Apparatus including means for either (1) discharging sublimed CO[subscrpt]2[end subscrpt] into insulation or (2) circulating said gas within a hollow wall structure which is sealed except for a sublimed gas inlet and outlet.

SEE OR SEARCH THIS CLASS, SUBCLASS:
273 for a similar arrangement serving to prevent condensation upon insulation.

This subclass is indented under subclass 384. Apparatus including means for guiding in a path a liquid being cooled for external use, the liquid remaining as such during the cooling operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
98 for related processes.
389 for an otherwise cooled withdrawable liquid cooler.

This subclass is indented under subclass 384. Apparatus comprising means for regulating, directing, forcing or controlling the flow of an external gas in a predetermined flow path relative to a cooling means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
404 for any otherwise cooled gas circulating or directing means.

This subclass is indented under subclass 384. Apparatus constructed and arranged to disperse into a storage enclosure sublimed gas from a solid gas compartment or holder.

SEE OR SEARCH THIS CLASS, SUBCLASS:
78 for processes including providing a special atmosphere for a refrigerator.

This subclass is indented under the class definition. Apparatus including means for guiding in a path a liquid being cooled for external use, the liquid remaining as such during the cooling operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
98 for related processes.
177 for automatic control of external fluid.
294 for a sealed container having a cutter or punch to release the container contents.
304 particularly subclass 306 for a liquid dispenser with gas-liquid contact means.
318 for a separating-clarifier for cooled withdrawable liquid.
336 for material handlers of diverse types.
337 particularly subclass 338 for a liquid container or flow line within a storage enclosure.
373 for a liquid contacting distinct article type of cooler.
386 for a withdrawable liquid cooler specific to use of solidified gas.
430 for a cooler which may use a flowing liquid as an intermediate heat exchanging medium.
457.1 for a portable receptacle type cooler of general and
specific utility.
530 for an envelope type container for a liquid which may be refrozen.

SEE OR SEARCH CLASS:
222, Dispensing, appropriate subclass, particularly subclass 146 for dispensing means of more general application.

This subclass is indented under subclass 389. Apparatus in which there are plural liquid outlets or sources, e.g., dispensing faucets or barrels.

SEE OR SEARCH CLASS:
137, Fluid Handling, 561 particularly subclasses 594+ and 602+, for a fluid distribution system of general application.
222, Dispensing, 129 for plural source dispensers of general application.

This subclass is indented under subclass 389. Apparatus in which there is a receiver for withdrawn liquid, e.g., flows in heat exchange relationship with the incoming liquid or the waste liquid or the waste liquid is collected in an open container.

SEE OR SEARCH CLASS:
137, Fluid Handling, 312 for fluid handling of general utility with a drip or waste receiver.
222, Dispensing, 108 for a dispenser with a drip or a waste receiver.

This subclass is indented under subclass 389. Apparatus including an agitator for the liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
342 for means for working (agitating) congealing material.
434 and 435, for means agitating an intermediate heat exchanging liquid.

SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 109.1 for a heat exchanger of general application with an agitator.
366, Agitating, 144 for an agitating device with cooling means.

This subclass is indented under subclass 389. Apparatus including (1) means confining the withdrawable liquid, (2) means confining a coolant, and (3) means confining a fluid which acts to transfer heat between means (1) and (2).

SEE OR SEARCH THIS CLASS, SUBCLASS:
430 for intermediate fluid heat exchanging combinations.

This subclass is indented under subclass 389. Apparatus in which a refrigerant evaporator is in heat exchange relationship with a liquid flow line, liquid container, or other liquid storage means.

This subclass is indented under subclass 394. Apparatus in which the refrigerant evaporator is located between the cooled liquid container or flow line and insulation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
451 for a coolant container-enclosure relationship.

This subclass is indented under subclass 389. Apparatus in which the flow path is in indirect heat exchange relationship with a coolant, e.g., ice or liquid.

This subclass is indented under subclass 396. Apparatus in which the container for the liquid to be cooled is of the barometric feed type, i.e., a container in which atmospheric pressure is utilized for maintaining a liquid within the container against its hydrostatic head.

SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 453 for a barometric feed device of general application and see the Notes thereto.

This subclass is indented under subclass 396. Apparatus in which means forming the flow path is arranged to support solid coolant material.

This subclass is indented under subclass 396. Apparatus comprising a helical or spiral coil.

This subclass is indented under subclass 396. Apparatus in which the flow path is in nested concentric relationship with an ice holder.

This subclass is indented under the class definition. Apparatus in which there are means for compressing, cooling, and expanding gas which remains throughout in a gaseous state.

SEE OR SEARCH THIS CLASS, SUBCLASS:
86 for related processes.
172 for automatic control of related apparatus.

SEE OR SEARCH CLASS:
165, Heat Exchange, 121 for a heat exchanging and air pump combination of general application.
418, Rotary Expansible Chamber Devices, 83 for rotary expansible chamber devices having heat exchange means.

This subclass is indented under subclass 401. Apparatus in which the expanding air actuates a motor to produce work.

SEE OR SEARCH THIS CLASS, SUBCLASS:
38 for related liquefied gas product producing apparatus.

SEE OR SEARCH CLASS:
415, Rotary Kinetic Fluid Motors or Pumps, appropriate subclass for a turbine of general utility.

This subclass is indented under subclass 402. Apparatus in which the motor includes a reciprocating element, e.g., piston.

SEE OR SEARCH THIS CLASS, SUBCLASS:
6 for a "Stirling" cycle machine.

This subclass is indented under the class definition. Apparatus comprising means for forcing or directing gas in a desired flow path relative to cooling means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
89 for processes involving circulation of cooled gas.
186 for automatic control of air circulation.
255 for a cooled display device having air controlling or directing means.
304 particularly subclass 314 for a gas-liquid contact material cooler often involving air circulation.
336 for a cooled material handler of diverse types in which one of the materials may be air.
337 for a cooled article compartment and an isolated material (air) handler.
387 for a cooler peculiar to solidified gas (CO2) and having an external gas circulator or director.

This subclass is indented under subclass 404. Apparatus including a storage compartment in indirect heat transfer relationship with the cooled gas.

SEE OR SEARCH THIS CLASS, SUBCLASS:
246 particularly subclass 253 for a hollow jacket display cabinet.
406 for indirect liquid or holdover means cooling a gas.
417 for a cabinet with air circulating means and plural cooled storage compartment separated by an imperforate wall.

This subclass is indented under subclass 404. Apparatus including an enclosure sealed off from both the primary
cooling means and from the gas to be cooled, such enclosure containing a secondary heat transfer medium and in which there is structure directing the gas over or through the secondary means enclosing the heat transfer medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:
393 for a withdrawable liquid with intermediate heat transfer.

This subclass is indented under subclass 404. Apparatus including means for directing the cooled gas relative to the interior of an enclosure to be cooled.

SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 104.18 and 104.22+ for a heat exchanger with an impeller circulating an intermediate enclosed body of fluid.
454, Ventilation, appropriate subclasses for a ventilated enclosure of general application.

This subclass is indented under subclass 407. Apparatus including adjustable means for varying the flow of gas.

SEE OR SEARCH THIS CLASS, SUBCLASS:
187 for automatic control of a damper between compartment.
265 for compartment access closure means operating a gas flow controller.

This subclass is indented under subclass 408. Apparatus controlling an opening to the exterior of the enclosure.

SEE OR SEARCH CLASS:
454, Ventilation, particularly 322 and 333+ for building
ventilating of general application including an adjustable valve on an air inlet.

This subclass is indented under subclass 407. Apparatus including a port for the gas being cooled opening to the ambient atmosphere exteriorly of the enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
409 for similar structure with a variable flow controller for the gas.

This subclass is indented under subclass 410. Apparatus including additional means for causing gas flow, e.g., blower, air scoop or heating means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
414 419 and 426+, for other combinations including gas forcing means.

SEE OR SEARCH CLASS:
454, Ventilation, appropriate subclasses for a building having a ventilation air pump of general application.

This subclass is indented under subclass 410. Apparatus including an inlet and an outlet port for the atmosphere exteriorly of the cooled enclosure.

SEE OR SEARCH CLASS:
454, Ventilation, 237 for building ventilation of general application including an inlet and outlet.

This subclass is indented under subclass 407. Apparatus including combining and dividing separate circulating gas streams at a common verging area.
(1) Note. Many of these patents are for freight cars with air cooling ice bunkers at opposed ends.

SEE OR SEARCH THIS CLASS, SUBCLASS:
255 for a display cabinet which may include means causing verging air flow.

This subclass is indented under subclass 413. Apparatus including powered means causing flow of a gas.

SEE OR SEARCH THIS CLASS, SUBCLASS:
411 for similar structure with an exterior port.

This subclass is indented under subclass 413. Apparatus including a cooler unit in each of a plurality of the separate gas streams.

This subclass is indented under subclass 415. Apparatus placed above a storage space and adjacent opposed walls of a cooled enclosure.

This subclass is indented under subclass 407. Apparatus including a dividing wall or partition having substantial imperforate areas forming a plurality of cooled compartments.

SEE OR SEARCH THIS CLASS, SUBCLASS:
441 for a cooled enclosure with plural compartments of more general utility.

This subclass is indented under subclass 407. Apparatus including passage means connecting the cooling means and a gas distributing or plenum chamber at least one wall of which is foraminous.

SEE OR SEARCH THIS CLASS, SUBCLASS:
421 for an enclosure with gas circulating means and a foraminous ice container.

SEE OR SEARCH CLASS:
454, Ventilation, 296 for an air distributor including a foraminous wall.

This subclass is indented under subclass 407. Apparatus including a mechanical gas forcing means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
314 for similar structure including a gas liquid contactor.
411 for gas flow forcing means relative to a ventilating port.

SEE OR SEARCH CLASS:
165, Heat Exchange, 121 for a fan forcing air through a heat exchanger not specialized to refrigeration.

This subclass is indented under subclass 407. Apparatus, wherein the gas is directed in heat exchange relationship with container means holding ice.

SEE OR SEARCH THIS CLASS, SUBCLASS:
327 for an ice bunker wall movable to convert to an uncooled storage space, e.g., iced car to ordinary freight car.

This subclass is indented under subclass 420. Apparatus, wherein the ice holding means includes a foraminous wall or bottom.

SEE OR SEARCH THIS CLASS, SUBCLASS:
418 for a foraminous gas flow distributor connected by passage means to cooling means.

This subclass is indented under subclass 421. Apparatus, including ice-melt collecting means over a dry storage chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
459 for a mere cooled enclosure involving ice melt collection, distribution or use.

This subclass is indented under subclass 422. Apparatus, having a dry storage chamber in side by side relationship with the ice holding means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
415 for similar structure having at least two spaced cooling units, e.g., ice bunkers.

This subclass is indented under subclass 420. Apparatus, including means forming a gas flow passage beneath the ice holding means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
421 for a melt collector providing a gas flow passage beneath a foraminous wall container.

This subclass is indented under subclass 404. Apparatus, in which the gas passes in direct contact with the cooling means (ice) in its compartment.

SEE OR SEARCH THIS CLASS, SUBCLASS:
387 for means having features specific to the use of solidified gas.

This subclass is indented under subclass 404. Apparatus, including gas forcing means structurally related to the cooling means for moving the air thereover, e.g., self-contained air circulating and cooling units.

SEE OR SEARCH THIS CLASS, SUBCLASS:
272 particularly subclass 277 for a similar unit having atmospheric condensate handling means.
314 for similar structure including a gas liquid contactor.
411 for a blower related to a ventilation part of a cooled enclosure.
414 for similar structure relative to verging streams and a cooled enclosure.
419 for gas forcing means relative to a cooled enclosure.

This subclass is indented under subclass 426. Apparatus
including an inlet for a stream of gas to be cooled and an inlet for adding an additional stream to the former stream, e.g., an air conditioning unit mixing a cooled stream of air with a stream of air from the cooled enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
122 for related processes.

SEE OR SEARCH CLASS:
454, Ventilation, 237 for a related ventilation device of general utility.

This subclass is indented under subclass 426. Apparatus wherein the gas is directed over a heat rejecting element of a refrigeration system.

SEE OR SEARCH THIS CLASS, SUBCLASS:
90 for processes of circulating external gas with reheating.
173 for automatic control of external fluid reheating.
272 for the handling of atmospheric condensate on a heat absorber.
305 for gas-liquid contact means cooling a heat rejecter.
427 for similar structure arranged for admitting fresh and recirculated air.
505 and 506, for a refrigeration producer with a heat rejecting element cooling feature.

This subclass is indented under subclass 428. Apparatus, including a plurality of blowers driven by common driving means.

This subclass is indented under the class definition. Apparatus including (1) a solid heat holdover member or (2) means forming a compartment which contains a substance acting as an indirect heat transferring medium or reserve coolant, mounted on or forming part of a refrigeration producer or forming part of the structure of a cooled enclosure, e.g., storage compartment wall, and acting to transfer heat to a heat absorber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
59 for processes of accumulating holdover ice in situ.
99 for processes of cooling a fluid using indirect heat transfer fluid.
185 for automatic control of an intermediate heat transfer medium.
356 for mold means with an intermediate heat transfer medium.
393 for means for cooling withdrawable liquid including an intermediate heat transfer medium.
406 for an air cooler with an air passage over or through an indirect heat transfer container or holdover.
457.1 for a portable receptacle confining a coolant.
530 for an envelope confining a coolant.

This subclass is indented under subclass 430. Apparatus including means forming a plurality of side-by-side or superimposed storage compartments.

SEE OR SEARCH THIS CLASS, SUBCLASS:
340 for means having congealed product making features.
441 for cooled enclosure with plural compartments.

This subclass is indented under subclass 431. Apparatus, including features arranged to maintain different
temperatures in the various storage compartments, e.g., by (1) varying the flow of indirect fluid surrounding the compartments, (2) varying the quantities of indirect fluid surrounding the compartments or, (3) a disparate arrangement of the primary coolant elements in the indirect fluid or holdover.

This subclass is indented under subclass 431. Apparatus including a top access opening for each compartment.

SEE OR SEARCH THIS CLASS, SUBCLASS:
458 for an enclosure having an open access cooled surface.

This subclass is indented under subclass 430. Apparatus including flow line connection to a heat exchanger in or forming the compartment to be cooled.

SEE OR SEARCH THIS CLASS, SUBCLASS:
435 for an enclosure wherein the indirect fluid surrounding a compartment is agitated.

This subclass is indented under subclass 430. Apparatus including a pump or agitator means for the indirect fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
342 for congealed product making and agitating.
392 for a withdrawable liquid cooler and agitator.

SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 104.18 and 104.22+ for a heat exchanger of general application having an intermediate exchanger fluid circulated by a mechanical impeller.
366, Agitating, appropriate subclass for an agitator of more
general utility.

This subclass is indented under subclass 430. Apparatus including distinct sections or casings which are connected to each other by a flow line for either the coolant or the indirect fluid.

This subclass is indented under subclass 430. Apparatus including a normally nonliquid heat accumulator.

SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 400 for a heat accumulator there provided for and see the Notes thereto.

This subclass is indented under subclass 430. Apparatus including a shaped, cooled storage compartment formed by an intermediate heat transferring fluid container.

SEE OR SEARCH THIS CLASS, SUBCLASS:
516 for a shaped evaporator, per se.

This subclass is indented under subclass 430. Apparatus including a unitary coolant confining flow line and jacket means surrounding it.

SEE OR SEARCH THIS CLASS, SUBCLASS:
394 for a withdrawable liquid cooler having an evaporator surrounding or within a container.

This subclass is indented under the class definition. Apparatus supported relative to means forming an enclosure.
(1) Note. The cooled enclosure may be open to the atmosphere and include only means forming a boundary for a cooled surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:
239 for a vehicle feature.
246 for an enclosure with a display feature.
259 for a structural installation.
265 for a compartment access closure combined with air blocking means.
272 for an enclosure with means preventing or handling atmospheric condensate.
297 for a cooled enclosure with an external support.
309 for gas-liquid contact material cooling means and means circulating gas relative to a cooled enclosure.
371 for a portable, commodity-containing receptacle.
407 for enclosures with means directing cooled gas relative to it.
430 for a cooled enclosure with indirect heat transfer or holder means.
516 for an evaporator which in itself forms a cooled enclosure.
529 for a refrigerant or coolant storer or handler, e.g., ice storing enclosure specialized to such use.

SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), appropriate subclasses for the structure, per se, which may be defined as forming a refrigerated space, particularly 380, 404.1+, 408+, and 479+.
220, Receptacles, 560.04 and 592.01+ for a receptacle intended to form a cooled enclosure.
312, Supports: Cabinet Structure, appropriate subclasses, particularly 31 for a cabinet with gas or vapor treatment,
subclass 116 for a refrigerated show case, and subclass 236 for a cabinet with heat exchange means and see the Note thereto.

This subclass is indented under subclass 440. Apparatus including means dividing the enclosure into plural compartments, each of which is cooled.

SEE OR SEARCH THIS CLASS, SUBCLASS:
252 for plural display compartments.
337 for a cooled storage compartment and material handler.
417 for plural compartments with a gas director.

This subclass is indented under subclass 441. Apparatus including a separate heat absorber or remover for each of the compartments, said heat absorbers operating in parallel.

This subclass is indented under subclass 441. Apparatus having the heat absorbing or removing element either serving as a partition separating plural cooled compartments or secured to a partition in such a manner as to lie adjacent thereto and be a part thereof.

This subclass is indented under subclass 443. Apparatus in which the heat absorbing element or section forms an integral part of an exterior wall of the cooled enclosure.

This subclass is indented under subclass 443. Apparatus including a distinct heat absorbing element or section spaced from the heat absorbing partition.

This subclass is indented under subclass 443. Apparatus in which the heat absorbing partition is so shaped as to form plural sides of a compartment, e.g., freezing and cooled compartments.

This subclass is indented under subclass 441. Apparatus including a separating partition having insulating properties.

SEE OR SEARCH THIS CLASS, SUBCLASS:
329 for means including a movable shelf or partition constructed for converting the mode of operation or use.
383 for an adjustable thermal member varying heat transmission, e.g., movable insulating means.

This subclass is indented under subclass 440. Apparatus in which a refrigeration producer or part thereof is movable relative to the cooled enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
237 for an ambulant cooled enclosure and separable power or cooling source.
298 for apparatus having means for repairing, assembling or disassembling it.
465 for particular supporting means with an enclosure, e.g., resilient support for shelf.

This subclass is indented under subclass 448. Apparatus in which a portion of the enclosure wall moves with the movable refrigeration producing part.

This subclass is indented under subclass 449. Apparatus in which the movable part has a fan for forced circulation of air over the condenser of the refrigeration producer.

SEE OR SEARCH THIS CLASS, SUBCLASS:
506 for a compressor-condenser-evaporator refrigeration producer with means causing cooling fluid contact with a rejector and see the Notes thereto.

This subclass is indented under subclass 440. Apparatus in which the heat absorbing element is covered by insulating material or contained within a hollow wall forming at least part of a cooled enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
395 for a withdrawable liquid cooler including an evaporator between it and insulation.
405 for a jacketed enclosure with means for circulating a gas through it.

This subclass is indented under subclass 440. Apparatus including features rejecting or aiding in the rejection of heat from at least one element of a flowing refrigerant type refrigeration producer and/or means forming an enclosure for such elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:
506 for compressor-condenser-evaporator refrigeration producer with means causing cooling fluid contact with a heat rejector and see the Notes thereto.

This subclass is indented under subclass 452. Apparatus in which the heat rejecting element contacts and is supported in heat conducting relationship with a wall forming the exterior of the enclosure.

This subclass is indented under subclass 452. Apparatus including means to circulate air over the rejecting element or vent air from the heat rejecting element enclosure.

This subclass is indented under subclass 454. Apparatus including means to force air over the heat rejecting element.

SEE OR SEARCH THIS CLASS, SUBCLASS:
305 for similar structure including a gas liquid contactor.

This subclass is indented under subclass 454. Apparatus in which the heat rejecting element enclosure is a compartment below the cooled enclosure and there is a distinct vertical flue communicating with and extending upwardly therefrom.

Portable receptacle:
This subclass is indented under subclass 440. Apparatus, including means associated with (e.g., supported by, supporting, or surrounding), or integral with, a transportable container (e.g., a bottle, a carrier, etc.), which means has feature peculiar to refrigeration or cooling the container's contents; e.g., a sealed nonrefillable coolant containing compartment, ice melt handling means, ice support means, means supported by ice, or a particular refrigerant, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:
293 for a hand manipulable tool which may include a coolant container with means for manipulating it for use as a cooling means.
297 for a refrigerator with external support means.
371 for a portable commodity containing type package or another type of container.
389 particularly subclasses 397 and 400 for a withdrawable liquid type cooler which may include a cooled liquid supplying container.
530 for a portable envelope type coolant container.

SEE OR SEARCH CLASS:
215, Bottles and Jars, appropriate subclass, for glass or ceramic portable receptacles, particularly 12.1 for a spaced wall and jacket receptacle even if the space is merely a coolant compartment.
220, Receptacles, 592.01 for a receptacle having means for maintaining its contents above or below ambient temperature which may include spaced walls for merely receiving a coolant in a space between them.

With holdover material:
This subclass is indented under subclass 457.1. Apparatus including a substance acting as an indirect heat transferring medium or reserve coolant, wherein the substance is carried by (mounted on or forming part of the structure of) the container (e.g., a storage compartment wall) and adapted to transfer heat to a heat absorber.
(1) Note. "Blue ice", gel, and saline solutions are types of materials used as holdover materials.

SEE OR SEARCH THIS CLASS, SUBCLASS:
371 for a portable commodity containing type refrigerator, particularly subclass 372 for such apparatus including means to support both the commodity and a solid refrigerant.
430 for a refrigerator having an intermediate fluid container adapted to transfer heat to the holdover material.
529 for a portable refrigerant container, particularly subclass 530 for an envelope type container.

Drinking container:
This subclass is indented under subclass 457.2. Apparatus including a beverage receptacle adapted for contact with a user's mouth; e.g., a mug, etc.

For beverage receptacle:
This subclass is indented under subclass 457.2. Apparatus adapted to cool a beverage container; e.g., a can of beer or soda, etc.

For multiple receptacles:
This subclass is indented under subclass 457.4. Apparatus adapted to cool a unitary plurality of beverage containers; e.g., a six pack cooler.

Cooled serving dish:
This subclass is indented under subclass 457.1. Apparatus adapted for use as a container or platter for serving edible products which are normally served cold, e.g., butter, raw shrimp, etc.

Picnic/lunch box type cooler:
This subclass is indented under subclass 457.1. Apparatus wherein the container is adapted to carry edibles (e.g., an assortment of foods and drinks) and maintain them in a cold state.
(1) Note. Picnic coolers and lunch boxes with cooling means are intended for this subclass.

Wine server/cooler:
This subclass is indented under subclass 457.1. Apparatus adapted to either accommodate a container of wine (e.g., a bottle or a carafe) or itself hold the wine.

Cooled by means other than ice (e.g., mechanical, electrical, absorption, cryogenic, etc.):
This subclass is indented under subclass 457.1. Apparatus including a refrigerating system independent of frozen water for cooling the container.

This subclass is indented under subclass 440. Apparatus including an open access surface and cooling means therefor.

SEE OR SEARCH THIS CLASS, SUBCLASS:
235 for a rink.
246 particularly subclasses 256 and 257 for an open access display cabinet.
258 for a noncooled work surface.
373 for cooling apparatus contacting an article with a liquid.
515 for an evaporator, per se, which may serve to support an article.

SEE OR SEARCH CLASS:
165, Heat Exchange, 168 for a plate type heat exchanger of general application.

This subclass is indented under subclass 440. Apparatus including means for supporting ice.

SEE OR SEARCH THIS CLASS, SUBCLASS:
132 for automatic control of ice melting or ice melt handling.
241 for means retarding sloshing of ice melt due to vehicle motion.
285 for an atmospheric condensate retainer or director.
312 for ice holder and ice drip-gas contactor.
318 for an ice-melt purifier.
321 for means utilizing and comminuting ice.
371 for a portable commodity containing type which commonly utilizes ice.
379 for means handling a solid refrigerant as an article.
384 for a cooler utilizing a solidified gas.
398 399 and 400, for a withdrawable liquid cooler utilizing ice.
420 for means for directing gas flow relative to an ice compartment.
425 for gas flow in contact with ice.
529 for ice holding or supporting means, per se.

This subclass is indented under subclass 459. Apparatus including means to direct ice meltage or drip in heat exchanging relationship with the space within the enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
312 for refrigeration in which the ice meltage contacts gas.

This subclass is indented under subclass 460. Apparatus including means distributing the ice melt laterally of the ice holding chamber.

This subclass is indented under subclass 459. Apparatus including a valve or a trap in a flow line for the ice melt.

SEE OR SEARCH CLASS:
137, Fluid Handling, 147 for liquid valves or liquid trap seals of general application.

This subclass is indented under subclass 459. Apparatus including a container at least partially surrounding the cooled enclosure.

This subclass is indented under subclass 459. Apparatus including an ice support located within an enclosure with means providing access to said support for loading or unloading the ice through the top or roof of the enclosure.

This subclass is indented under subclass 440. Apparatus including a particular support means for an element within the cooled enclosure or means having a particular cooperative
supporting relationship between the enclosure and an element within it.

SEE OR SEARCH THIS CLASS, SUBCLASS:
326 for means supporting an element to change the size or function of a compartment.
382 for a cooled compartment with defined means for supporting a drawer, tray or other track guided means.

This subclass is indented under subclass 465. Apparatus including resilient means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
295 for a resiliently supported power element.

This subclass is indented under the class definition. Apparatus comprising means to cause a cooling effect by producing a change in the condition of a material, e.g., change of phase of a material or applying and releasing a stress on a material.
(1) Note. The change of condition must be that due to causes other than mere heat exchange or transfer.

SEE OR SEARCH THIS CLASS, SUBCLASS:
332 for a diverse system.
335 for plural paired element refrigeration producing systems.

This subclass is indented under subclass 467. Apparatus including means handling a lubricant.

SEE OR SEARCH THIS CLASS, SUBCLASS:
84 for related processes.
192 for automatic control of lubrication.

SEE OR SEARCH CLASS:
184, Lubrication, appropriate subclasses for lubrication in general.
418, Rotary Expansible Chamber Devices, 83, for rotary expansible chamber devices having nonworking fluid lubrication or seal means.

This subclass is indented under subclass 468. Apparatus comprising a compressor and its motor which form a unit located within a common refrigerant and lubricant containing casing.

SEE OR SEARCH CLASS:
417, Pumps, subclass 372, for interrelated or common lubricating means for a pump or compressor and the drive motor therefor, and subclass 902, for a hermetically sealed motor and pump or compressor unit.

This subclass is indented under subclass 468. Apparatus including means for separating the lubricant from the refrigerant.

SEE OR SEARCH CLASS:
210, Liquid Purification or Separation, 168 for a separator installed in a closed cycle lubrication system of general application.

This subclass is indented under subclass 470. Apparatus in which the lubricant separator is at the evaporator or in its suction line.

This subclass is indented under subclass 471. Apparatus including means heating separated lubricant.

SEE OR SEARCH THIS CLASS, SUBCLASS:
275 for a device in which the lubricant and refrigerant may be heated for defrosting purposes.

This subclass is indented under subclass 470. Apparatus, including a condenser or similar receiver having means to separate the lubricant from the liquid refrigerant therein.

This subclass is indented under subclass 467. Apparatus including means acting to keep the refrigerant in a normal operating condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:
85 for related processes.
195 for automatic control of or by impurity removing means.
292 for means for charging a closed refrigeration producer.
303 for means cleaning external parts of refrigeration apparatus.
317 for means for purifying an external fluid or ice melt.
401 for air compressing-cooling-expanding type refrigeration produce which may include means for purifying the air used as a refrigerant.
470 for a lubricant separator.
476 particularly subclasses 490+, 495+ and 497 for means for separating substances necessarily present in a sorbent type refrigeration producer.

SEE OR SEARCH CLASS:
55, Gas Separation, appropriate subclasses, for gas or vapor purification in general.
96, Gas Separation: Apparatus, for gas separation apparatus, per se.
210, Liquid Purification or Separation, appropriate subclass for liquid purification in general.

This subclass is indented under subclass 474. Apparatus including means for discharging an impurity from the refrigeration producer.

This subclass is indented under subclass 467. Apparatus including means utilizing a sorbent for a refrigerant fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
101 for related processes.
141 for automatic control of a sorbent type refrigeration producer.
232 for a time or program actuated sorbent type refrigeration producer.
269 for a refrigerating system with an open gas or vapor outlet utilizing a hygroscopic agent.
271 for atmosphere and sorbent contact apparatus.

SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, appropriate subclass for a liquid vaporizer, per se, even though disclosed as a sorbent-generator.

This subclass is indented under subclass 476. Apparatus in which the refrigeration producing unit acts alternately and intermittently, as a sorber and as a still (generator).

This subclass is indented under subclass 477. Apparatus connected to another unit acting alternately as a condenser and then as an evaporator.
(1) Note. This type of unit is commonly known as "icy-balls".

This subclass is indented under subclass 477. Apparatus including means returning a sorbent liquid from the evaporator back to the sorber-generator.

This subclass is indented under subclass 477. Apparatus including means utilizing a solid sorbent.

This subclass is indented under subclass 477. Apparatus including means acting to cool the sorber-generator during sorption.

SEE OR SEARCH THIS CLASS, SUBCLASS:
146 for automatic control of cooling fluid.

This subclass is indented under subclass 481. Apparatus
including a cooled liquid flow line connected to the sorber-generator unit.

This subclass is indented under subclass 476. Apparatus including pump means forcing a gas or vapor to or from the sorption unit.

SEE OR SEARCH THIS CLASS, SUBCLASS:
51.1 for a refrigerator using a liquid condenser and expander only, e.g., wherein the condenser and vaporizer are the same unit or wherein the atmosphere serves as a heating medium.

This subclass is indented under subclass 476. Apparatus comprising a generator, a sorbent liquid container commonly termed a reabsorber and an evaporator connected by flow lines in a closed cycle relationship so that vapor driven off by the generator contacts the liquid in the reabsorber to form a mixture rich in refrigerant which liquid mixture flows to the evaporator.

This subclass is indented under subclass 476. Apparatus including means causing contact of a cooling fluid with the sorber and/or a condenser.

This subclass is indented under subclass 476. Apparatus including means cooling the liquid refrigerant flow line to an evaporator.

This subclass is indented under subclass 476. Apparatus including means by which the internally generated pressures of the system or internal capillary means causes or aids in the circulation of absorption fluid between a generator and sorber.

This subclass is indented under subclass 487. Apparatus including a closed vessel which accumulates sorption liquor, which vessel acts to intermittently return sorption liquor to the generator.

This subclass is indented under subclass 476. Apparatus including features to heat or cool a flow line directly connecting the sorber and generator.

This subclass is indented under subclass 476. Apparatus including means whereby a refrigerant is contacted with a gas which is chemically inert to the refrigerant or sorbent.
(1) Note. This system operates under a uniform total pressure with the pressure in the evaporator being the sum of the partial pressures of the inert gas and the pressure of the refrigerant vapor, i.e., it operates according to Dalton's law of partial pressures and is commonly operated by heating means for household refrigerator use.

This subclass is indented under subclass 490. Apparatus including a gas-liquid contacting structure within a flow confining element of that part of the circuit utilizing the inert gas.

This subclass is indented under subclass 491. Apparatus in which the gas-liquid contacting structure is within the evaporator.

This subclass is indented under subclass 490. Apparatus in which there is means to cool the flow line for inert gas connecting the sorber to the evaporator.

This subclass is indented under subclass 476. Apparatus including structure within the sorber having particular gas-liquid contact features.

This subclass is indented under subclass 476. Apparatus including means located between the generator and condenser acting to remove the sorbent vapor from the refrigerant-vapor mixture.
(1) Note. Such means is termed "rectifier".

This subclass is indented under subclass 495. Apparatus in which the sorbent vapor separator includes means holding a body of liquid which is contacted by the vapor and enters below the upper face of the body of liquid.

This subclass is indented under subclass 476. Apparatus, including means within the generator enhancing the separation of the refrigerant and sorbent.

This subclass is indented under subclass 467. Apparatus, including means arranged in a closed circuit to compress, condense and evaporate a fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
115 for related processes.
401 for an air compressor-cooler-expander type refrigeration producer.

SEE OR SEARCH CLASS:
417, Pumps, appropriate subclasses, and see especially subclass 902 for gas pumps, per se.
418, Rotary Expansible Chamber Devices, appropriate subclasses, for rotary expansible chamber compressors, per se.

This subclass is indented under subclass 498. Apparatus having a plurality of refrigeration producing units connected to move in fixed relationship to each other.

This subclass is indented under subclass 498. Apparatus in which the compressor is jet type powered by a fluid of a circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:
191 for a similar system with automatic control.
268 for an open outlet vacuumized chamber in which the pump may be a jet pump.

SEE OR SEARCH CLASS:
417, Pumps, 151 for jet type pumps, per se.

This subclass is indented under subclass 498. Apparatus in which a fluid external of the circuit is utilized as a motive fluid for the compressor which fluid passes in heat exchange relationship with a portion of the circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:
238 for means using heat of disparate apparatus to operate a refrigerating system.

This subclass is indented under subclass 498. Apparatus in which there are different kinds of fluids in the circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:
114 for related processes.
468 where the auxiliary medium performs only a lubricating function.
476 particularly subclasses 490+ for a sorbent type refrigerant producer utilizing diverse fluids.
500 for a jet powered system which may use one kind of fluid as a pumping medium and another as a refrigerant.

SEE OR SEARCH CLASS:
252, Compositions, 67 for a refrigerant composition.

This subclass is indented under subclass 498. Apparatus
including means for trapping or dispersing liquid refrigerant between the evaporator outlet and the compressor inlet.

SEE OR SEARCH THIS CLASS, SUBCLASS:
83 for processes of preventing slugging to the compressor.
174 for automatic control of trapping and discharging refrigerant batches.
471 for similar structure wherein the liquid is a lubricant or lubricant mixed with a refrigerant.
512 for a liquid-vapor separator and separated liquid recycle.

This subclass is indented under subclass 498. Apparatus including means to apportion the liquid refrigerant to distinct regions of an evaporator.

SEE OR SEARCH THIS CLASS, SUBCLASS:
199 for automatic control for by-passing an evaporator through another evaporator.
335 for plural paired different function refrigeration producing elements.
525 for plural distinct evaporators, per se, with particular flow distributors.

This subclass is indented under subclass 498. Apparatus including means using the refrigerant being circulated for cooling either the compressor or a motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:
513 for heat exchange between diverse function elements of a refrigeration producer.

SEE OR SEARCH CLASS:
417, Pumps, 366 for a pump drive motor which is cooled by pump fluid.
418, Rotary Expansible Chamber Devices, 83 for rotary expansible chamber devices having heat exchange means.

This subclass is indented under subclass 498. Apparatus including means causing flow of a cooling fluid outside of the refrigeration producer to cool a heat rejecting portion of it.

SEE OR SEARCH THIS CLASS, SUBCLASS:
90 for processes of circulating and heating an external gas.
113 for processes involving circulating a cooled gas and reheating it.
146 for automatic control of cooling fluid in a sorbent system.
173 for automatic control of reheating.
183 for automatic control of cooling fluid for a heat rejecter.
238 for disparate apparatus utilized as a heat absorber or rejecter.
277 particularly subclass 279 for means using rejected heat in handling or preventing atmospheric condensate.
305 for gas-liquid contact means cooling a heat rejecter.
324 for a reversible heat pump.
332 for diverse systems, one of which may reject heat to another.
353 for means using rejected heat to thaw a congealed product mold.
391 for means receiving withdrawn cooled liquid which may direct it to a heat rejecter.
428 for gas forcing means and means directing a gas over a heat rejecter.
452 for a cooled enclosure with an enclosure or feature for cooling a heat rejecter.
476 for a sorbent type refrigerator producer.
501 for a compressor actuating means which also cools a heat rejecter.

This subclass is indented under subclass 506. Apparatus including means utilizing the ambient atmosphere as a cooling means.

This subclass is indented under subclass 507. Apparatus in which the compressor and its driving motor are located within a common refrigerant containing casing.

SEE OR SEARCH THIS CLASS, SUBCLASS:
469 for similar structure in which the casing also contains lubricant.

This subclass is indented under subclass 498. Apparatus including a receiver between the condenser and evaporator, e.g., surge tank.

SEE OR SEARCH THIS CLASS, SUBCLASS:
83 for processes of preventing slugging to a compressor.
117 for processes of compressing, condensing and evaporating involving division of the refrigerant flow in separate paths.
474 for a receiver of this type wherein the refrigerant is purified.
503 for a trap in the suction line, and see the Notes thereto.

This subclass is indented under subclass 498. Apparatus comprising more than one compressor or a compressor that is equipped to simultaneously produce more than one suction pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:
332 for diverse systems.
335 for plural paired diverse function refrigeration producing systems.

This subclass is indented under subclass 498. Apparatus including a fixed area flow restricting passage arrangement such as an orifice, porous plug or capillary tube.

SEE OR SEARCH THIS CLASS, SUBCLASS:
527 for an evaporator with a flow controller or boiling expediter.

SEE OR SEARCH CLASS:
138, Pipes and Tubular Conduits, 40 for a flow restrictor of general application.

This subclass is indented under subclass 467. Apparatus including a distinct separator acting to separate, other than by evaporation, the refrigerant into gas and liquid fractions combined with means to return the separate liquid fraction to the evaporator.

SEE OR SEARCH THIS CLASS, SUBCLASS:
503 for a trap in the suction line, and see the Notes thereto.

This subclass is indented under subclass 467. Apparatus
having means to interchange heat between diverse function elements of the refrigerator producer, e.g., exchanging heat between the evaporator and condenser or hot liquid flow line.

SEE OR SEARCH THIS CLASS, SUBCLASS:
277 particularly subclasses 279+ for means utilizing heat developed by a refrigeration producer for preventing or removing atmospheric condensate.
476 for a sorbent type refrigerant producing system often involving heat exchanging within the system.
501 for means using a fluid as source of power and as a heat exchanger.
505 for means involving a motor or compressor by refrigerant of the circuit.

This subclass is indented under subclass 467. Apparatus including means specialized to expanding or evaporating a refrigerant.

This subclass is indented under subclass 515. Apparatus forming a cooled enclosure.
(1) Note. The enclosure may be open to the atmosphere, e.g., U-shaped.

SEE OR SEARCH THIS CLASS, SUBCLASS:
440 particularly subclass 451 for an evaporator mounted within a surrounding enclosure, or an insulated evaporator.

This subclass is indented under subclass 516. Apparatus wherein the enclosure is provided with means for closing an opening.

This subclass is indented under subclass 516. Apparatus in which the evaporator means surrounds distinct inner enclosure forming means.

This subclass is indented under subclass 516. Apparatus comprising (1) distinct section forming multiple compartments or each differing in some structural characteristic, (2) portions contacting a wall of a chamber and distinct sections extending outwardly from and spaced from the chamber wall, (3) having distinct heat exchanging surfaces, e.g., fins, having different structural or heat exchanging characteristics, or (4) distinct flow line connected evaporators.

SEE OR SEARCH THIS CLASS, SUBCLASS:
441 for a cooled enclosure with plural compartments and see the Notes thereto.

This subclass is indented under subclass 519. Apparatus wherein the distinct sections or zones are formed by a shelf which is itself an evaporator.

This subclass is indented under subclass 516. Apparatus having a shelf or a support for a receptacle or shelf.

This subclass is indented under subclass 521. Apparatus in
which the shelf is integral with or permanently attached to a wall of the evaporator.

This subclass is indented under subclass 516. Apparatus in which a wall of the evaporator is corrugated or embossed.