*****TBD*****

This subclass is indented under the class definition. Processes.

(1) Note. All patents containing method claims drawn to the method of operation of any of the systems or parts thereof involved in the class are included in this and the indented subclasses, but methods of making parts of the system are not included. They will be found in the subclass providing for the system or part.

(2) Note. This subclass includes, for example, methods of operation of speed regulators for prime movers, valves, fluid motors; methods of developing fluid pressures by series parallel combinations of pumps, tanks or pipes; methods for affecting fluid flow by using pipe sections of varying diameter or joined at critical angles, or by slugging.

SEE OR SEARCH CLASS:

166,	Wells, subclasses 244.1+ for process of flowing or treating a well; and particularly subclasses 373+ for a method of operating a valve, closure, or changeable restrictor in a well wherein some significant manipulative step regarding the well is recited.
210,	Liquid Purification or Separation, subclasses 606 , 631, 632, 639, 663+, 696+, 702+, and 749+ for a process comprising the step of adding a chemical to a liquid with treatment of the liquid.
222,	Dispensing, subclass 1 for processes of dispensing.
399,	Electrophotography, subclasses 237+ for liquid developer applied to a latent image within an electrophotographic device.
414,	Material or Article Handling, subclasses 800+ for a process of material or article handling.

544	WITH MEANS FOR SEPARATING SOLID MATERIAL FROM THE FLUID:

This subclass is indented under the class definition. Apparatus having means for separating one or more materials from a fluid mixture either by providing a physical barrier to the passage of particles over a given size or by providing a trap where heavier material may be deposited.

(1) Note. Means for separating solid material from fluid in pressure fluid valve actuating means or in servo-motor supply lines are excluded from this subclass. Patents which include such separating means in pressure fluid valve actuation or servo-motor operating systems are classified on the basis of those other features, for which classification has been provided, but cross referenced here when useful disclosures are present.

SEE OR SEARCH THIS CLASS, SUBCLASS:

140,	for siphons with strainers, filters, separators or sediment traps.
237+,	for distribution systems having positively acting cleaning means.
583+,	for distribution systems with cleanout openings.
599.14	through 599.15, for systems dividing into parallel flow lines then recombining having a bypass including a cleaning, treating, or heat transfer feature.

SEE OR SEARCH CLASS:

138,	Pipes and Tubular Conduits, appropriate subclasses for screens in pipes and conduits, especially subclass 41 for restrictors combined with screens.
210,	Liquid Purification or Separation, subclasses 418+ for means to filter a liquid combined with a flow controller for the material being treated and see the search notes thereunder.
222,	Dispensing, subclasses 189.06+ for dispensers combined with screens, strainers and foraminous guards.
399,	Electrophotography, subclasses 237+ for liquid developer applied to a latent image within an electrophotographic device.

545	. Plural separating elements:

This subclass is indented under subclass 544. Apparatus in which the separating means includes plural elements.

(1) Note. The separating means may be of similar or dissimilar types, and may be positioned in the same or in different flow passages.

546	. Sediment chamber:

This subclass is indented under subclass 544. Apparatus in which the separating means includes a chamber for trapping sediment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

237+,	for distribution systems embodying positively acting cleaning means.
583+,	for distribution systems in which there is an access opening for cleaning purposes.

SEE OR SEARCH CLASS:

210,	Liquid Purification or Separation, subclasses 294+ for fluid handling means combined with diverse means for liquid separation, especially subclasses 302 and 313; and subclasses 513+ for flow controller combined with a gravitational separator, especially subclasses 533+.

547	. Movable strainer:

This subclass is indented under subclass 544. Apparatus in which the separating means is a strainer which is movable with respect to the flow path without being removed from the apparatus.

(1) Note. This subclass includes strainers which may be moved from one position to another in the system, e.g., may be selectively positioned in one flow path or in another.

SEE OR SEARCH THIS CLASS, SUBCLASS:

861+,

for spouts, valves or deflectors at the junction of three flow paths, shiftable from one to another of two outlets.

549	. Hollow strainer, fluid inlet and outlet perpendicular to each other:

	This subclass is indented under subclass 544. Apparatus in which the separating means is a foraminated or porous body or hollow strainer arranged with the fluid inlet in an axial direction and the outlet in a generally radial direction or vice versa.

550	. Planar strainer normal to flow path:

	This subclass is indented under subclass 544. Apparatus in which the separating means is a strainer defining a substantially plane surface and disposed perpendicular to flow path.

551	WITH INDICATOR, REGISTER, RECORDER, ALARM OR INSPECTION MEANS:

This subclass is indented under the class definition. Apparatus comprising fluid handling means combined (1) with an indicator, register, recorder, or alarm responsive to a condition or position of a part of the apparatus or of the fluid in the apparatus or (2) with means which permits inspection of normally hidden parts of the apparatus or of the fluid inside the apparatus.

(1) Note. A movable element performing a blocking, disabling or actuating function is not considered to be an indicator unless it or a cooperating member has some indicia with position indicating significance.

SEE OR SEARCH THIS CLASS, SUBCLASS:

213+,	for liquid level responsive whistles in diverse fluid containing pressure systems.
227+,	for inflating stems and/or chucks with gauge or indicator.
524,	for direct responsive valves biased closed with bias adjustment indicator.
586,	for telltales which have no indicia associated therewith and which also serve as blocking means for access opening covers.

SEE OR SEARCH CLASS:

73,	Measuring and Testing, appropriate subclasses for pressure, level, temperature, etc., measuring and indicating means, per se.
116,	Signals and Indicators, appropriate subclasses for mechanical signals and indicators.
222,	Dispensing, subclasses 23+ for recorders, signals indicators, etc., in dispensers and subclasses 154+ for inspection devices in dispensers.
251,	Valves and Valve Actuation, subclass 297 for detents that inherently give an audible signal or click.
340,	Communications: Electrical, subclasses 870.01+ for quantitative electric telemetering systems of general application, and subclasses 603+ for nonquantitative electric alarms responsive to fluent material condition, such as level.

This subclass is indented under subclass 551. Apparatus comprising more than one indicator, register, recorder, alarm or inspection means or more than one of the beforementioned types of subcombinations.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 25+ for plural indicators, etc., in dispensers.

552.5

.. Unobvious - "combination lock" type:

This subclass is indented under subclass 552. Apparatus wherein the information conveyed by the indicators is in some code not obvious to an uninformed operator, whereby the operation is similar to that required by combination locks in that the indicators must be positioned in a predetermined relationship to allow flow through the system.

SEE OR SEARCH THIS CLASS, SUBCLASS:

383+,	for apparatus including a lock or seal.
613+,	for mere serial valves in a single flow path.

This subclass is indented under subclass 551. Apparatus calibrated in time.

SEE OR SEARCH CLASS:

368,	Horology: Time Measuring Systems or Devices, appropriate subclasses for time indicators, per se.

553	. Position or extent of motion indicator:

This subclass is indented under subclass 551. Apparatus comprising an indicator which gives information as to the position or range of motion of a movable or adjustable part of the apparatus, e.g., a valve or adjustable wall.

(1) Note. Usually the indicator is a scale and pointer but an edge or other distinct line on an element of the apparatus may serve as the pointer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

227+,	for gauge or indicator with means for inflating or deflating inflatable articles.
524,	for bias adjustment indicators for safety valves.

SEE OR SEARCH CLASS:

116,	Signals and Indicators, subclasses 200+ for scale and pointer subcombinations, especially subclass 277 for valve position indicators.
222,	Dispensing, subclasses 41+ for means for indicating position and/or extent of motion in dispensers.

554	.. Electrical:

This subclass is indented under subclass 553. Apparatus in which electrical signal system means are used to sense and/or indicate the position or extent of motion in valves.

SEE OR SEARCH THIS CLASS, SUBCLASS:

392,	for electrical characteristic sensing in level responsive or maintaining systems.

SEE OR SEARCH CLASS:

340,	Communications: Electrical, subclasses 870.01+ for quantitative electric telemetering systems of general application.

555	.. Selection from plural branches:

This subclass is indented under subclass 553. Apparatus in which the indicator shows the position or selection for use of one of a plurality of paths.

SEE OR SEARCH CLASS:

222,	Dispensing, subclass 42 for indicators showing selection from plural dispenser outlets.

556	.. Indicator element rigidly carried by the movable element whose position is indicated:

This subclass is indented under subclass 553. Apparatus in which an element of the indicator is an integral part of, or is rigidly carried by, the movable or adjustable part.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 47+ for similar indicators in dispensers.

556.3

... Movable indicator element is a pointer:

	This subclass is indented under subclass 556. Devices wherein the movable indicator element comprises a pointer.

556.6

.... Pointer integral with handle:

	This subclass is indented under subclass 556.3. Devices wherein the pointer is an integral part of the valve handle.

557	. Fluid pressure responsive indicator, recorder or alarm:

This subclass is indented under subclass 551. Apparatus provided with a visual indicator, audible alarm or recorder which is responsive to the pressure of the fluid in the flow path.

SEE OR SEARCH THIS CLASS, SUBCLASS:

213+,	for liquid level responsive whistles in diverse fluid containing pressure systems.
227+,	for pressure gauges or indicators combined with inflatable article (e.g., tire) filling chucks and/or stems.
524,	for means for indicating the bias adjustment of a safety valve.

SEE OR SEARCH CLASS:

73,	Measuring and Testing, subclasses 700+ for fluid pressure gauges, per se.
116,	Signals and Indicators, subclasses 264+ for fluid flow indicators.
222,	Dispensing, subclasses 23+ for dispensers having pressure responsive indicators, especially subclass 39 for audible signals.

558	. Liquid level responsive indicator, recorder or alarm:

This subclass is indented under subclass 551. Apparatus provided with a visual indicator, audible alarm or recorder which is responsive to the level of the liquid in some part of the apparatus.

(1) Note. An indicator comprises means which has at least an indicating and a nonindicating position, or a plurality of indicating positions, and does not require inspection of the material in the system to establish the distinction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

213+,	for whistles used as liquid level responsive indicators in systems involving gas pressure storage over or displacement of liquid.
559,	for sight glasses. See (1) Note.

SEE OR SEARCH CLASS:

73,	Measuring and Testing, subclasses 290+ for liquid level and depth gauges, particularly subclass 322.5 for floats, per se.
116,	Signals and Indicators, subclasses 227+ for liquid level indicators.
222,	Dispensing, subclass 51 for float level indicators for dispensers.

559	. Inspection means:

This subclass is indented under subclass 551. Apparatus which provides means which permit or facilitate observation or inspection of the fluid inside the apparatus or of normally invisible parts of the apparatus.

SEE OR SEARCH CLASS:

73,	Measuring and Testing, subclass 323 for sight glasses, per se.
222,	Dispensing, subclasses 154+ for dispenser combined inspection devices comprising gauge tubes, sight openings, transparent flow line sections or graduated transparent containers.

This subclass is indented under the class definition. Apparatus which comprises devices or parts in addition to or combined with distribution systems and (1) having functions other than material handling or (2) which serve to perfect the material handling apparatus for its intended purpose.

(1) Note. For a definition of a distribution system, see subclass 561.

(2) Note. Subcombinations otherwise classifiable in Class 251, Valves and Valve Actuation, have been included herein if combined with subject matter of the types defined in (1) and (2) of the subclass definition above.

(3) Note. This subclass includes for example, Fluid supply or valve actuation to or from diving bells, drinking troughs or cups not part of the flow system, carburetor mount protection, testing devices, anti-freeze liquid chambers and control means for devices or operations not a part of the material handling system.

SEE OR SEARCH CLASS:

222,	Dispensing, subclass 192 for dispensers with miscellaneous combined features and the preceding subclasses for particular combinations provided for therein.

This subclass is indented under the class definition. Systems comprising means for confining flowable material during its flow or making it available for flow and either causing or controlling its flow or potential flow, which means is (1) a combination of material containing or confining means, such as tanks or conduits, in flow relation with flow causing means, such as pumps, (2) combinations of two or more material confining devices in flow relation, including branched flow lines and hydrostatic devices, such as standpipes or vertically adjustable outlet and overflow conduits in open communication with the confined body of flowable material; and (3) combinations of material confining devices with flow controlling means when more of the material confining device is claimed than is necessary to mount the flow controlling means.

(1) Note. Flow controlling means comprise valves with or without actuating means, closures for flow passages, flow restrictors, baffles and guides.

(2) Note. Passages which divert material from the flow system for the purpose of actuating or controlling a pump or valve or similar part which is solely concerned with the mechanics of handling the main flow of the material are not considered flow confining means.

(3) Note. This subclass provides for flow dividers of the nonautomatic nonvalved, nonaccumulating type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

115.01+,	and 118.01+, for self controlled branching systems having plural outflows. See (3) Note.
262,	for flow dividing by passage through or overflow from plural compartments. See (3) Note.
597,	for systems having a multiple inlet with a multiple outlet.
599.01	through 601.21, for systems dividing into parallel flow lines then recombining.
631+,	for cyclically actuated valves. Lines With Other Classes and Within This Class, (2) Plural Valves, and Subclass References to the Current Class, for search notes on plural nonautomatic valves.
861	through 877, for systems having a flow control means for branched passages.

SEE OR SEARCH CLASS:

73,	Measuring and Testing, subclasses 863+ for a sampling system which obtains a predetermined portion of a mass of material to be tested.
222,	Dispensing, appropriate subclasses, for subject matter which comprises distribution systems as defined above, but which has in most instances particular application to the problems of vending or handling fluent solids.
251,	Valves and Valve Actuation, subclasses 12+ for valve actuators which divert and use a part of the material being handled in the system to actuate or retard valves controlling the fluid flow in such systems. See (2) Note, above.
399,	Electrophotography, subclasses 237+ for liquid developer applied to a latent image within an electrophotos:graphic device.

561A	. Non-valved flow dividers

	This subclass has no definition.

562	. Faucet connected, sink drained:

This subclass is indented under subclass 561. Systems including means whereby a tank may be filled from a faucet and drained into a sink or basin associated with the faucet.

(1) Note. The tank is usually a dish or clothes washer or some equivalent device which receives and discharges a quantity of water, which may be used either in the tank or during the process of discharge.

SEE OR SEARCH THIS CLASS, SUBCLASS:

357+,	for static structural installations of fluent material handling means in buildings.
374,	for fluent material handling means combined with house furnishings.
603,	for distribution systems comprising attachments of the mixing type for two conventional faucets.

563	. Closed circulating system:

This subclass is indented under subclass 561. Systems including a flow path in which at least a portion of the fluent material is continuously circulated in a closed circuit. Such system may comprise (1) one or more return by-passes in which a portion of the fluent material in a flow line is diverted from and returned to the flow line at a point upstream from the point of diversion, or (2) a system in which the main portion of a flow continuously returns to the starting point, and one or more branches are provided for tapping and removing from the circuit a portion of the fluent material or one or more branches are provided for admitting fluent material from an outside source into the circuit, or (3) all the material circulates in a confined path without addition or removal of material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

115.01+,	for by-passes controlled by condition change in the main line.
407,	for level responsive systems in which an auxiliary measuring chamber is connected at its top and bottom to the accumulation chamber the level in which is to be controlled or sensed.
599.01	through 601.21, for systems dividing into parallel flow lines then recombining.

SEE OR SEARCH CLASS:

222,	Dispensing, subclass 318 for dispenser systems involving return of material to the supply.

564	.. With thermal circulating means (thermo-siphons):

This subclass is indented under subclass 563. Systems comprising a circulating system in which the thermal characteristics of the system are such that temperature differences exist at spaced points in the device and cause flow of the fluent material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

334+,

especially subclasses 337 and 340 for similar structure in which heat exchange is the primary consideration, and see the definition of subclass 334 for collected search notes on fluent material handling systems involving heat or heating means.

564.5

. Main line as motive fluid for follower-type feeder:

This subclass is indented under subclass 561. System including an additive reservoir in a shunt on a main line, the reservoir including noncommunicating compartments defined by a blind follower actuated by main line pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

205.5,

for an intermediate fluid layer as a follower in a similar shunt feeder system.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 386+ for a dispenser having a discharge assistant comprising a container with a follower. See the notes thereunder.

565.01

. With pump:

This subclass is indented under subclass 561. Subject matter wherein the system includes a pump that supplies energy to a fluid by suction or pressure or both.

(1) Note. The combination of a pump and a tank generally will be classified in this class (137). However, a single nominally recited tank reservoir, chamber, pump, or other similar fluid holding means will be classified elsewhere. See SEARCH CLASS notes below.

Image 1 for class 137 subclass 565.01

Figure 1: A typical example of the subject matter. A- Automatic washing machine system; B - Pump; C - Drain pipe; D- Drain hose.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13,	for a process wherein the addition of material or energy effects the flowing fluid.
147+,	for a pump or liquid displacement device for starting a siphon-type fluid handling system.
206+,	for a gas and liquid containing system wherein the gas under pressure is employed to displace liquid.
282,	for a hydrant-type fluid handling system having a pump or an ejector.

SEE OR SEARCH CLASS:

222,	Dispensing, Class Definition, (9) Note for other pump-tank relationships; and subclasses 372+ for a material supply container and a discharge assistant with casing including a pump.
417,	Pumps, for a single nominally recited tank reservoir, chamber, pump, or other similar fluid holding means; see Class Definition, (3) Note; subclasses 46+ for a condition responsive pump drive motor by controlling drive motor motive fluid; and subclasses 279+ for condition responsive control of pumped fluid.
418,	Rotary Expansible Chamber Devices, appropriate subclasses for a rotary expansible chamber pump, per se.

565.11

.. Pumped fluid control:

This subclass is indented under subclass 565.01. Subject matter including regulating means for varying the flow of a gas or liquid.

(1) Note. Patents for pump motor control are classified elsewhere. See SEARCH CLASS notes below.

Image 1 for class 137 subclass 565.11

Figure 1: A typical example of the subject matter. A- Gas pump; B - Conduit; C - Barrier or restriction; D - Materiallyreduced opening; E - Branch pipe to burner.

SEE OR SEARCH THIS CLASS, SUBCLASS:

109+,

for a self-controlled branched flow system.

SEE OR SEARCH CLASS:

415,	Rotary Kinetic Fluid Motors or Pumps, subclasses 110+ for an internal fluid biased seal or packing.
417,	Pumps, for pump motor control; subclass 270 for condition responsive fluid control; and subclasses 279+ for condition responsive control of pumped fluid.

565.12

... Manual:

This subclass is indented under subclass 565.11. Subject matter including a nonautomatic valve mechanism for selectively regulating the fluid flow.

Image 1 for class 137 subclass 565.12

Figure 1: A typical example of the subject matter. A- Manual control; B - Connecting pipe; C - Hydraulic pump; D - Electricmotor; E - Reservoir or tank; F - Normally open switch; G - Actuatinglever.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 213+ for manually actuated mechanical movement actuator, subclasses 231+ for a lever-type mechanical movement actuator, and subclass 294 for a flexible actuator (e.g., Bowden cable or wire, chain).

565.13

... Fluid pressure responsive:

This subclass is indented under subclass 565.11. Subject matter wherein means sensing the change in fluid force controls the effectiveness of pumped fluid flow.

Image 1 for class 137 subclass 565.13

Figure 1: A typical example of the subject matter. A- Pump; B - Fluid pressure responsive valve; C - Pilot line; D -Fluid system.

SEE OR SEARCH THIS CLASS, SUBCLASS:

455+,

for a valve controlled in response to a change in the fluid condition occurring within the system or the line including the valve and list for a self-controlled branched flow system including a bypass relief controlled by a main line condition.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclass 28 for a fluid actuated pilot valve, subclasses 61+ for a flexible wall expansible chamber valve actuator, and subclasses 62+ for a piston-type expansible valve actuator.
417,	Pumps, subclass 295 for condition responsive pumped fluid control including inlet throttle or stop valve and subclasses 307+ for a pressure responsive relief or bypass valve.

565.14

.... And pilot valve:

This subclass is indented under subclass 565.13. Subject matter comprising an auxiliary controlling operation of a fluid pressure operator valve.

Image 1 for class 137 subclass 565.14

Figure 1: A typical example of the subject matter. A- Reservoir; B - Fluid; C - Main flowline; D - Pump; E - Discharge;F - Pilot valve; G - Control circuit.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 25+ for a pilot or servotype with an alternative pressure source or pilot valve, subclasses 28+ for a fluid actuated pilot valve, subclasses 30.01+ for an electrically actuated valve, and subclasses 118+ for a material guide or restrictor.
417,	Pumps, subclass 252 for a pressure responsive interstage discharge and subclass 428 for a bypass control.

565.15

.... Direct response valve:

This subclass is indented under subclass 565.13. Subject matter including (a) a valve head having a face and (b) a nonreturn element wherein the nonreturn element is responsive to pressure of a line fluid.

Image 1 for class 137 subclass 565.15

Figure 1: A typical example of the subject matter. A- Discharge; B - Tank or reservoir; C - Outlet hose assembly; D- Inlet; E - Inlet valve; F - Flexible hose; G - Check valve; P- Pump.

SEE OR SEARCH THIS CLASS, SUBCLASS:

511+,

for a direct response check valve.

SEE OR SEARCH CLASS:

210,	Liquid Purification or Separation, subclass 136 for a fluid pressure or material level responsive flow control system including a check valve.

565.16

... Electric:

This subclass is indented under subclass 565.11. Subject matter wherein the regulating means is an electrically operated valve.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 59+ for automatic control wherein the cutoff is operated by rate of flow responsive mechanism.
251,	Valves and Valve Actuation, subclasses 129.01+ for an electrically actuated control valve.

565.17

.. Combined with fluid receiver:

This subclass is indented under subclass 565.01. Subject matter wherein the system includes a receptacle or container for accepting gas or liquid.

Image 1 for class 137 subclass 565.17

Figure 1: A typical example of the subject matter. A- Reservoir; B - Sump; C, D - Pumps; M - Motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

577+,

for a system with a tank or reservoir with a movable or adjustable outlet or overflow pipe; subclasses 590+ for a system with a tank or reservoir having internally extending flow guide, pipe or conduit; and subclasses 896+ for a multiple inlet, single outlet system including means to promote mixing or combining of plural fluids.

SEE OR SEARCH CLASS:

222,	Dispensing, subclass 318 for a discharge assistant such as an impeller or a pump with a bypass or supply to a container and subclasses 333+ for a fluid motor operated discharge assistant.
261,	Gas and Liquid Contact Apparatus, subclass 70 for a float controlled, valved fluid distribution system; and subclasses 72.1+ for a fluid distribution system including a liquid supply tank.

565.34

... Reserve or surge receiver:

This subclass is indented under subclass 565.17. Subject matter including a pump and (a) a reservoir or a holding tank under atmospheric pressure usually at an elevation above the pump, and in open or check controlled communication with the pump outlet line to receive surplus fluid for storage or to absorb sudden rise of pressure, or (b) a parallel supply from a different line or from a container supplied from a source other than the pump.

SEE OR SEARCH CLASS:

138,	Pipes and Tubular Conduits, subclasses 26+ for a pressure compensator for a pipe or conduit.
222,	Dispensing, subclasses 129+ for a dispenser having plural sources or supply containers.
417,	Pumps, subclasses 540+ for an expansible chamber-type pump having a pulsation dampening fluid receiving space.

565.18

... Compressed air supply unit:

This subclass is indented under subclass 565.17. Subject matter comprising means for supplying fluid at a pressure higher than the atmospheric pressure.

Image 1 for class 137 subclass 565.18

Figure 1: A typical example of the subject matter. A- Compressor unit; B - Storage reservoir; C - Unloader governor;D - Pipe supplies fluid under pressure from compressor to reservoir;E - Valve body; F - Operating handle (valve).

SEE OR SEARCH THIS CLASS, SUBCLASS:

571+,	for a system wherein plural tanks or compartments are connected for a serial flow.
899.4,	for a wheeled fluid compressor and fluid storage tank.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 3+ for gas or vapor dispensing and subclasses 401+ for a container-mounted fluid pressure generating pump or pulsator.
417,	Pumps, subclasses 44.2+ for pressure responsive motor controls responsive to pumped fluid pressure.

565.19

... Hydraulic power unit:

This subclass is indented under subclass 565.17. Subject matter comprising a fluid reservoir, a pump for withdrawing fluid from the reservoir, or further including one or more selector valves together with a fluid motor to supply high pressure fluid to another device.

Image 1 for class 137 subclass 565.19

Figure 1: A typical example of the subject matter. A- Well casing; B - Impulse actuated pump; C - Hydraulic cylinder;D - Accumulator (load compensating reservoir); E - Housing; F -Liquid storage tank; G - One-way valve.

SEE OR SEARCH CLASS:

60,	Power Plants, subclasses 413+ for controlling the structure storing the work driving energy such as an accumulator.
91,	Motors: Expansible Chamber Type, subclasses 418+ for a hydraulic motor with a motive fluid valve.
222,	Dispensing, subclasses 383.1+ for a container mounted pump or pulsator.
417,	Pumps, subclass 287 for controlling the pumped fluid of the plural diverse capacity pump units and subclasses 440+ for an expansible chamber-type pump including a bypass valve for control of pumped fluid.

565.37

... Fluid sump:

This subclass is indented under subclass 565.17. Subject matter including pit, depression, or reservoir serving as (a) a drain or (b) a receptacle for liquid to be stored for a later use.

Image 1 for class 137 subclass 565.37

Figure 1: A typical example of the subject matter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

563,	for a closed circulating system having a similar pump.

SEE OR SEARCH CLASS:

60,	Power Plants, subclasses 477+ for a pressure fluid source as a motor including a ram driven by fluid which is pumped from the reservoir and having means for pressurizing, vacuumizing, or venting the reservoir.
222,	Dispensing, subclasses 383.1+ for a discharge assistant such as a supply container and a pump including container mounted pump or pulsator.

565.22

.. And jet-aspiration type pump:

This subclass is indented under subclass 565.01. Subject matter including a pump wherein a motive fluid and a driven fluid are brought into intimate contact in an enclosed flow path, the motive fluid having a higher velocity than the driven fluid and imparting energy to the driven fluid by the action of entrainment contact.

Image 1 for class 137 subclass 565.22

Figure 1: A typical example of the subject matter. A- Pump; B - Tank or reservoir; C - Jet-aspiration pump; D - Diffuser;E - Vent; F - Drain valve.

SEE OR SEARCH CLASS:

261,	Gas and Liquid Contact Apparatus, subclasses 76+ for an injector-type gas and liquid contact apparatus where there is a mutual exchange of properties between the fluids.
417,	Pumps, subclasses 65+ wherein one fluid is pumped by contact or entrainment with the other, subclasses 76+ for a jet pump having a motive fluid generating pump, subclasses 87+ for diverse pumps including a jet pump, and subclasses 151+ for a jet pump.

565.23

.. Vacuum pump:

This subclass is indented under subclass 565.01. Subject matter wherein the device or machine creates a system pressure lower than the ambient pressure.

Image 1 for class 137 subclass 565.23

Figure 1: A typical example of the subject matter. A- Vacuum chamber; B - Movable member in chamber; C - Casing withsealing liquid; E - Preliminary pump; F - Final pump.

SEE OR SEARCH CLASS:

417,	Pumps, subclasses 148+ for a vacuum generator.

565.24

.. Resiliently mounted pump:

This subclass is indented under subclass 565.01. Subject matter wherein the device or machine is supported on a vibration dampening element.

Image 1 for class 137 subclass 565.24

A - Tank; B - Motor; C - Pump; D - Outlet manifold; E - Resilientwasher; F - Tank pipe; G - Moulded resilient rings; H - Rubber plugs.

SEE OR SEARCH CLASS:

417,	Pumps, subclass 363 for a resiliently mounted pump or motor.

565.25

.. Hand pump:

This subclass is indented under subclass 565.01. Subject matter wherein the device or machine for supplying energy is operated manually.

Image 1 for class 137 subclass 565.25

Figure 1: A typical example of the subject matter. A- Pump chamber; B - Plunger; C - Handle.

SEE OR SEARCH CLASS:

417,	Pumps, subclass 374 for a manual actuation of pump with an additional motor drive and subclass 425 for a separate manual and motor driven pumping member.

565.26

.. Multiple inlet with multiple outlet:

This subclass is indented under subclass 565.01. Subject matter including a fluent material branched flow line having two or more admission passages and two or more exhaust passages, wherein the admission passages and the exhaust passages are joined by one or more fluent material flow lines.

Image 1 for class 137 subclass 565.26

Figure 1: A typical example of the subject matter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

597,	for a fluid handling system with multiple inlets, multiple outlets; and subclasses 861+ for a system with individual flow control means for branched passages.

SEE OR SEARCH CLASS:

210,	Liquid Purification or Separation, subclasses 340+ for plural distinct separators having parallel filters with a flow controller.

565.27

.. Downstream cyclic distributor:

This subclass is indented under subclass 565.01. Subject matter including a distributing device receiving the discharge of the pump for sequentially establishing the communication with the pump fluid and operating to divide the fluid discharged by the pump into at least two separate flow paths leading to points of fluid utilization.

Image 1 for class 137 subclass 565.27

Figure 1: A typical example of the subject matter. A- Supply tank; B - Feed pump; C - Fuel injection pump; D - Pumpcasing; E, F - Plungers; G - Cyclic cam; H - Pump drive shaft; J - Relief valve.

SEE OR SEARCH CLASS:

123,	Internal-Combustion Engines, subclasses 448+ for a fuel injection system with a fuel pump flow regulation including a sequential distributor.

565.28

... Distributor part unitary with movable pump part:

	This subclass is indented under subclass 565.27. Subject matter wherein an element of the distributing device is integral with a member of the device or machine which is in motion.

565.29

.. Plural:

This subclass is indented under subclass 565.01. Subject matter having at least two or more pumps.

Image 1 for class 137 subclass 565.29

Figure 1: A typical example of the subject matter. A₁- Pumpone; A₂- Pump two.

SEE OR SEARCH CLASS:

222,	Dispensing, subclass 255 for dispensers having plural discharge assistants all of which are pumps.
417,	Pumps, subclasses 2+ for plural motor driven pumps having control of a pump drive motor in response to a condition of the pump or pump fluid.

565.3

... Serial:

This subclass is indented under subclass 565.29. Subject matter wherein two or more pumps are arranged in regular succession for fluid communication with each other.

Image 1 for class 137 subclass 565.3

Figure 1: A typical example of the subject matter. A- First housing; B - Second housing; C - First pump; D - Secondpump; E - Booster pump; F - Spray gun.

SEE OR SEARCH THIS CLASS, SUBCLASS:

571+,

for plural tanks or compartments which are connected for serial flow.

SEE OR SEARCH CLASS:

417,

Pumps, subclasses 201+ for a rotary nonexpansible pump in series with another diverse pump, subclasses 205+ for diverse pumps in series, subclasses 244+ for pumps with successive stages, subclasses 515+ for plural pumping chambers with mechanically actuated distributor, and subclasses 521+ for plural pumping chambers.

565.31

.... With single motive input:

This subclass is indented under subclass 565.3. Subject matter wherein two or more pumps are driven by one prime mover.

Image 1 for class 137 subclass 565.31

Figure 1: A typical example of the subject matter. A- Motor; B - Drive shaft; C, D, E, F, G - Series of pumps; H, J,K, L, M - Vessels in series.

SEE OR SEARCH CLASS:

417,	Pumps, subclass 350 for pumping members oppositely disposed from a single motor.

565.32

..... One pump driven by motive fluid from the other:

This subclass is indented under subclass 565.31. Subject matter wherein one pump additionally supplies gas or liquid as a power source for a motor to drive another device.

Image 1 for class 137 subclass 565.32

Figure 1: A typical example of the subject matter. A- Reservoir; B - Pressure pump; C - Supply motor pump; D - Supplyinlet; E - Pressure outlet; F - Intake of pressure pump; G - Outletof pressure pump; H - Fluid pressure user; J - Pressure inlet ofsupply motor pump.

SEE OR SEARCH CLASS:

417,	Pumps, subclass 382 for plural pumping members with one additionally supplying motive fluid for the second.

565.33

... Parallel:

This subclass is indented under subclass 565.29. Subject matter wherein the pumps discharge separate fluid flows to parts of the system other than one another.

Image 1 for class 137 subclass 565.33

Figure 1: A typical example of the subject matter. A- Beginning of pipeline; B, C - Inlet piece; D - Central supplypipe for oil; E - Oil pump; F - Annular water supply channel; G- Water pump.

(1) Note. This subclass takes plural parallel pump systems regardless of whether the pump outputs are supplied to separate devices or are combined.

SEE OR SEARCH THIS CLASS, SUBCLASS:

255+,

for plural tanks or compartments with parallel flow.

SEE OR SEARCH CLASS:

415,	Rotary Kinetic Fluid Motors or Pumps, subclass 155 for plural, independently adjustable vane or working fluid control means; and subclasses 198.1+ for plural rigidly related blade sets.

565.35

.. With pump bypass:

This subclass is indented under subclass 565.01. Subject matter having means whereby fluid in the system may either pass through the pump or be caused to flow around the pump.

Image 1 for class 137 subclass 565.35

Figure 1: A typical example of the subject matter. A- Inlet conduit; B - Discharge conduit; C - Bypass connecting inletconduit to outlet conduit; P - Motor driven pump; T - Timer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

115.01+,	for a self-controlled branched flow system including bypass or relief controlled by a main line condition.
563+,	for a closed circulating system including one or more return bypasses wherein a portion of the fluent material in a flow line is diverted from and returned to the flow line at a point upstream from the point of diversion and subclass 599.1 for a flow passage with a bypass connection.
599+,	for bypasses in distributing systems, and see the search notes to subclass 599.

SEE OR SEARCH CLASS:

222,	Dispensing, subclass 318 for a discharge assistant with a bypass or return to the supply.
417,	Pumps, subclasses 283 and 284 for a condition responsive pumped fluid control with a bypass or relief valve and subclass 440 for an expansible chamber-type pump having a separate noncyclic bypass valve.

565.36

.. Drain valve actuator mounted on pump:

This subclass is indented under subclass 565.01. Subject matter having a pump associated with fluid delivery tubing, usually vertically positioned in a well, the tubing being provided with a drain valve which has an actuator mounted on or supported by the pump housing, the pump mounting, or a part thereof.

Image 1 for class 137 subclass 565.36

Figure 1: A typical example of the subject matter. Note:Drain valve for pump: Valve is attached to pump tube. The operatingrod for valve extends through platform, and handle on the rod engagesthe housing on the platform.

SEE OR SEARCH THIS CLASS, SUBCLASS:

206+,

for a gas pressure storage for displacement of liquid and subclass 593 for a head-establishing standpipe or expansion chamber (e.g., surge tanks).

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 145+ for an apparatus including a pipe having a valve mounted on the side thereof, including a structure disclosed for use as a well tube drain, and wherein an actuator for the valve is mounted on the tube.
417,	Pumps, subclass 434 for a pump provided with a separate port on a noncyclic valve for draining the pump portion.

571	. Plural tanks or compartments connected for serial flow:

This subclass is indented under subclass 561. Systems in which two or more tanks or compartments are connected in such manner that all tanks except the last in the flow sequence deliver fluid only to one other tank and to no other type of receiver.

(1) Note. The containers other than the last in the series may have plural outlets but all the outflow of one must be to one other container, and all may have additional inflow from sources other than a tank.

SEE OR SEARCH THIS CLASS, SUBCLASS:

130+,	for siphons with discharge controlling receivers.
255+,	for plural tanks of which two or more have outflows to receivers other than to successive tanks, and see subclasses 263 and 265 for plural tanks connected for series-parallel flow.
406+,	for communicating measuring vessels for sensing weight of accumulated fluid.
428,	for float valves in separate communicating float chambers.
453+,	for series flow by barometric feed between a supply tank and a receiver.

SEE OR SEARCH CLASS:

222,

Dispensing, subclass 133 for dispensers having a separate inflow line connected to a tank and measuring trap system, and subclasses 424.5+ for dispensers having plural series connected compartments where the second one is a trap, i.e., a measuring or separating means receiving or segregating material from the first.

572	.. Separable with valved-connecting passage:

This subclass is indented under subclass 571. Systems in which the plural tanks are so constructed that they may be separated from one another and in which the passage by which the tanks are connected contains a valve or closure.

(1) Note. The separation is not in the normal use of the apparatus, but is usually for cleaning or replacement of parts of a system without loss of the main body of fluid, as in a transformer radiator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

320+,	for devices for tapping a pipe, keg or apertured tank under pressure, wherein the pipe, etc., has a valved outlet, the valve being actuated by the tapping device.
454,	for series tanks of the barometric type with a shut-off between the supply tank and receiver.
614,	for a flow device having serial valves and/or closures and a disconnectable coupling.

SEE OR SEARCH CLASS:

141,	Fluent Material Handling, With Receiver or Receiver Coacting Means, subclasses 22+ and 110+ for receivers removably associated with a filling supply for discharge.

573	.. Fluid progresses by zigzag flow:

This subclass is indented under subclass 571. Systems in which fluid passes through the tanks or compartments in a zigzag path.

SEE OR SEARCH THIS CLASS, SUBCLASS:

334+,

for heating exchange systems having convoluted flow paths.

SEE OR SEARCH CLASS:

193,	Conveyors, Chutes, Skids, Guides, and Ways, subclasses 27+ for zigzag conveyor chutes.
251,	Valves and Valve Actuation, subclass 127 for flow paths with valves and zigzag type flow restrictors.

574	.. Plural compartments formed by baffles:

This subclass is indented under subclass 571. Systems comprising a container having plural compartments formed by plates or walls in the flow path but only partially closing it.

SEE OR SEARCH THIS CLASS, SUBCLASS:

262,	for plural flow dividing compartments formed by weirs, baffles, etc.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclass 127 for baffles in a valve inlet or outlet for restricting flow through the valve.

575	.. Plural top-to-bottom connected tanks:

	This subclass is indented under subclass 571. Systems in which a flow passage leads from the top of one tank to the bottom of the next tank in the series.

576	.. With communicating opening in common walls of tanks or compartments:

This subclass is indented under subclass 571. Systems in which the tanks or compartments are connected by an opening in a wall common thereto.

SEE OR SEARCH THIS CLASS, SUBCLASS:

406+,	for systems controlled by the weight of accumulated fluid which is sensed in a communicating chamber.
428,	for liquid level responsive or maintaining systems having a control float in a separate communicating float chamber.

577	. Tank with movable or adjustable outlet or overflow pipe:

This subclass is indented under subclass 561. Systems comprising a tank having a discharge passage which may be moved or adjusted with respect to the tank to (1) remove material from a particular part of the tank, or (2) determine the level of material retained in the tank and/or the amount withdrawn from the tank.

SEE OR SEARCH THIS CLASS, SUBCLASS:

101.29,	for a swinging outlet pipe controller in a self proportioning system.
152,	for means for mounting siphons.
395+,	for apparatus for controlling outflow from a tank which is liquid level responsive or liquid level maintaining.
438,	for float arm operated valves associated with a movable nozzle or inlet terminal.
590+,	for tanks with internally extending flow guides or pipes which are not movable.
615+,	for articulated or swinging spouts or discharge outlets for distributing systems where the flow conduit is not mounted on a tank.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 434+ for adjustable overflow and/or outlet pipes for varying trap chamber volume in dispensers.

577.5

.. Horizontally traversing outlet:

This subclass is indented under subclass 577. Systems including a conduit placed or adapted to be placed within a receptacle, e.g., tank, reservoir or swimming pool, and means arranged to traverse the inlet end of the conduit in a generally horizontal direction, usually to remove sediment from the receptacle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

565+,	for similar systems including pumps.
590.5,	for nondraining overflow type liquid removers which have inlet conduits extending to the bottom of the receptacle.
899+,	for vehicle mounted fluid handling means.

SEE OR SEARCH CLASS:

15,	Brushing, Scrubbing, and General Cleaning, subclass 1.7 for submerged devices having cleaning means for that class, and subclass 246.5 for tanks with attached cleaners for that class.
210,	Liquid Purification or Separation, subclasses 523+ for gravitational separators and mechanical liquid removers.
294,	Handling: Hand and Hoist-Line Implements, subclasses 68.22+ for hoisting buckets or bailers.

578	.. Float-supported outlet:

This subclass is indented under subclass 577. Systems in which the intake end of the movable outlet is supported by a float.

SEE OR SEARCH THIS CLASS, SUBCLASS:

152,	for siphons in which the intake end is supported by a float in the supply tank.
386+,	especially subclasses 409+ for float controlled valves in liquid level responsive or maintaining systems.

579	.. Swinging outlet pipe or spout:

This subclass is indented under subclass 577. Systems in which the movable outlet comprises a pipe or spout which is mounted to swing with respect to the tank to control the level within the tank.

(1) Note. The outlet pipe may be external or internal with respect to the tank, but control of fluid flow depends on movement of the pipe rather than on valves.

SEE OR SEARCH THIS CLASS, SUBCLASS:

615+,

for articulated or swinging flow conduits, and see the search notes to subclasses 615 and 616.

580	. With running joint between movable parts of system:

This subclass is indented under subclass 561. Systems comprising a relatively movable fluid supply and fluid receiver normally joined by rotating or longitudinally sliding or telescoping elements forming a shifting flow passage at right angles to the direction of movement of the elements to allow fluid flow between the supply and receiver during relative movement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

257+,	for the combination of a relatively rotatable tank group and filling head in which the tank group and filling head are connected by a running joint.
277+,	for hydrants of the water crane type having a rotatable riser which is also vertically movable the connection between the riser and its supply frequently including a running joint.
355.16+,	for running joints between parts of the system, usually between the inlet and discharge portions of a hose wound on a reel and permitting fluid flow during relative movement.
581,	for distribution systems comprising a movable tank, and see the search notes thereto.

SEE OR SEARCH CLASS:

239,	Fluid Sprinkling, Spraying, and Diffusing, subclasses 195+ for sprinkler devices having a hose holder or reel and a running joint between parts of the system to permit fluid flow during relative movement.

581	. Movable tank:

This subclass is indented under subclass 561. Systems, including a tank mounted for movement with respect to supporting means, the supporting means not being positively recited in the claims, but movement of the tank being inherent in the operation of the device or required in causing or controlling flow of material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

38+,	for systems with flow control by inertia or change of position of the system.
170,	for feed traps movable into discharge relationship with a pressurized receiver.
257,	for rotatable tank groups for sequential filling and discharge.
313,	for leakage or drip collectors comprising a relatively movable receptacle and drain pipe or outlet.
376,	for tanks with supports.
408,	for gravitating tanks in liquid level responsive systems, and see the search notes thereto.
899+,	for systems with vehicular supports, and see the search notes to subclasses 351 and 899.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 160+ for dispensers having a movably mounted supply container, and subclasses 608+ for ambulant dispensing systems.

582	. With antisplash means not in flow passage:

This subclass is indented under subclass 561. Systems having means for preventing splashing of a liquid stream located in the path of flow of the liquid but not located in the conduit which carries the liquid, i.e., usually mounted in the tank receiving the liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

592,	for tanks having internally extending inlet pipes, and see the search notes thereto.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 118+ for valves combined with a material guide or restrictor in the flow passage which may reduce turbulence of the liquid, and see the search notes to subclass 118.

583	. System with plural openings, one a gas vent or access opening:

This subclass is indented under subclass 561. Systems having two or more openings at least one of which functions to vent gases to or from the system or serves as an opening permitting access thereto of persons or of tools other than those contributing to the intended fluid handling operation of the system.

(1) Note. An opening through which a valve actuator extends is not considered an opening in the system.

SEE OR SEARCH THIS CLASS, SUBCLASS:

43,	for vent opening or closing on tipping container.
136+,	143 and 144, for vents and air release means for siphons.
154+,	especially subclasses 173+, 179+ and 197+, for gas release from diverse fluid containing pressure systems, and 213+ for liquid level responsive gas vents or whistles in systems having gas pressure stored or maintained over liquid.
216+,	for back flow prevention by provision of air vents in liquid flow lines.
223+,	for means to relieve excess pressure in tires, especially in connection with inflation means.
237+,	for devices having openings for the introduction of cleaning fluids or claimed cleaning tools.
283+,	for hydrants having removable valves and valve seats.
326,	for containers in which a valve in the bottom can be removed through an opening in the top of the container.
327+,	for devices having disassembly tool engaging features.
364+,	for valve and meter wells.
597,	for apparatus having a plurality of inlets with a plurality of outlets.
602+,	for apparatus including tanks having a plurality of inlets and a single outlet.
613+,	for tanks having an inlet and an outlet.

SEE OR SEARCH CLASS:

4,	Baths, Closets, Sinks, and Spittoons, subclasses 209+ , especially subclasses 211, 218 and 219+ for ventilation means for house plumbing or sewers.
222,	Dispensing, subclass 442 for dispenser supply container and measuring trap combinations having a vent passage for the trap; subclasses 478+ for dispensers having plural fluid flow openings, including vents.

584	.. Access and outlet:

This subclass is indented under subclass 583. Systems in which one of the openings is an access opening and another is an outlet for fluid contents of the system.

(1) Note. The access opening admits tools other than those contributing to the intended operation of the device, as for cleaning or removal of parts, or allows workmen to reach into or enter the container.

(2) Note. Openings to admit an actuator or drain an actuator housing are not considered openings in the system nor access openings for this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

237+,	for devices having openings for the introduction of cleaning fluids or claimed cleaning tools.
283+,	for hydrants having removable valves and valve seats.
326,	for containers having means by which a valve in the bottom can be removed through an opening in the top of the container or by which such removal is facilitated.
327+,	for devices having disassembly tool engaging features.
342,	for systems providing support for a workman.
364+,	for valve and meter wells.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 291+ for detachable valve actuators, and see the search notes thereto and (2) Note, above.

585	... Tank access opening and bottom outlet:

This subclass is indented under subclass 584. Systems in which the access opening is formed in a tank, such as a tank car, usually comprising a manhole, and in which the outlet is at the bottom of the tank.

(1) Note. The patents herein are directed for the most part to structures comprising a tank car having a valved outlet in the bottom therein and a dome having a manhole at the top of the tank which allows manual access to the valve actuator and/or removal of valve parts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

283+,	for hydrants having the valve and valve seat removable through the casing.
326,	for containers having means by which a valve at the bottom of a tank can be removed through an opening in the top or by which such removal is facilitated. See (1) Note.

SEE OR SEARCH CLASS:

222,	Dispensing, subclass 510 for tanks having an outlet element in the bottom and a controller therefor extending through the tank and operated from the top.
251,	Valves and Valve Actuation, subclasses 144+ for tanks having the valve actuator passing through the tank, but not emerging through an inlet or manhole.

586	.... Access opening interlock or telltale on outlet valve actuator:

This subclass is indented under subclass 585. Systems in which the actuator for the valved outlet performs an additional function in the system by interengaging with or extending into the access opening in one position of the valve thereby preventing the application of a closure to the access opening while the bottom valve is open and/or indicating the open condition of the valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

553+,

for indicators for fluid delivery systems comprising means having indicia or attention attracting means other than the mere position of the part for indicating the position or extent of motion of valves or other system parts.

SEE OR SEARCH CLASS:

222,	Dispensing, subclass 483 for plural interlocked controllers and/or closures for plural openings in a dispensing system.

587	.. Tank with gas vent and inlet or outlet:

This subclass is indented under subclass 583. Systems in which one of the openings is a gas vent for a tank and another is a liquid inlet and/or outlet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

136+,	143 and 144, for vents and air release means for siphons.
154+,	for gas release from diverse fluid containing pressure systems, especially subclasses 197+ for discriminating outlets for gas in diverse fluid containing pressure systems.
213+,	for gas vents in systems utilizing a gas pressure over a liquid in which the vent opens or closes in response to liquid level, the gas escape frequently producing a signal whistle.
215+,	for air vents in liquid lines comprising vacuum breakers for back flow prevention.
469+,	and 511+, for safety valves, and see the search notes thereto.

SEE OR SEARCH CLASS:

220,	Receptacles, subclass 366.1 for vents in metallic and other receptacles, subclass 86.1+ for filling attachments for receptacles.
222,	Dispensing, subclass 39 for audible signals in dispensers, subclasses 478+ for gas vents combined with other openings in dispensing systems, especially subclass 479 for vent pipes substantially coterminous with an outlet pipe, as in barometric devices, and subclass 481.5 for dispensing systems having movable, flexible or remotely connected vent pipes.

588	... Vent and inlet or outlet in unitary mounting:

This subclass is indented under subclass 587. Systems in which the vent and the liquid passage are formed in a common mounting adapted to be attached to or removed from the supply container as a unit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

212,	for unitary mountings for gas and liquid fluid flow passages where the liquid passage is an outlet and the vent is an inlet for gas under pressure.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 400.7+ for unitary mountings applied to dispensers, the vent being a gas inlet for a displacing fluid, and subclasses 478+, especially subclass 479 for vents combined with dispensed material inlets or outlets.

589	.. With vented outlet:

This subclass is indented under subclass 583. Systems having a valved discharge conduit and means connecting such conduit with the atmosphere downstream of the valve, whereby the conduit may be drained of liquid after the valve has been closed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

215+,	for air vents in liquid lines comprising siphon breakers for back flow prevention.
312+,	for apparatus for collecting leakage or drip.
596+,	for apparatus comprising stop and waste valves, and see the search notes thereto.

590	. Tank with internally extending flow guide, pipe or conduit:

This subclass is indented under subclass 561. Systems comprising a tank having a material guide or flow pipe extending into the interior of the tank.

(1) Note. Valved flow conduits which extend into the tank only far enough to provide for lateral flow passages and/or receive fastening or mounting means are not included in this group of subclasses, but are classified on the basis of the valve and/or actuator in succeeding subclasses.

(2) Note. Interiorly extending flow pipes and conduits are included when in addition to the fact of interior extension some result or function of the extension is expressed or is inherent, as (1) to prevent or minimize freezing, (2) for the purpose of decanting the liquid contained in the tank, (3) for deriving a representative sample of the fluid in the tank, (4) to admit fluid below the liquid level, (5) to provide an outlet for pump or fluid displacement discharge, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

434+,

especially subclasses 437, 438, 440, and 442+ for float arm operated inlet valves at the inlet end of an internally extending inlet pipe.

SEE OR SEARCH CLASS:

210,	Liquid Purification or Separation, subclasses 308+ for filters with upwardly extending internal flow guides.
222,	Dispensing, subclasses 382 and 464.1+ for dispensers having an internally extending outlet pipe, and subclasses 547 and 564 for dispensers having a flow guide or restrictor within the supply container.
251,	Valves and Valve Actuation, subclasses 118+ for valves with material guides in the flow line, subclass 144 for a tank comprising a single flow path device provided with a single valve, and subclass 339 for valved devices wherein the valve actuator extends through a fluid inlet or outlet.

590.5

.. Nondraining overflow type:

This subclass is indented under subclass 590. Systems in which the material flow or guide means has laterally spaced inlet and outlet portions with (1) the end of the outlet portion positioned above the end of the inlet portion, (2) means, such as a vent, positioned relative to the end of the outlet portion so as to cut-off flow at an upper level.

(1) Note. These devices are intended to withdraw sediment and liquid from the bottom of the tank but to stop discharge when the liquid level drops to the outlet of the external portion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

123+,	for siphons.
577.5,	for pipes having positioning means for a traversing inlet.

SEE OR SEARCH CLASS:

15,	Brushing, Scrubbing, and General Cleaning, subclass 1.7 for submerged cleaners there provided for, and subclass 246.5 for tanks and attached cleaners there provided for.
210,	Liquid Purification or Separation, subclasses 523+ for gravitational separators and mechanical constituents movers, and subclasses 532.1+ for gravitational separators having heavier constituent traps.

591	.. Inverted "U" passage:

This subclass is indented under subclass 590. Systems in which the internally extending pipe comprises a conduit of inverted U-shape.

(1) Note. In order that the conduit be considered U-shaped, the shorter leg must be of substantial length.

SEE OR SEARCH THIS CLASS, SUBCLASS:

123+,	for siphon type fluid handling devices.
216+,	for antisiphon devices wherein an inverted U-shaped pipe is provided with a vent at the highest point to prevent back flow, the normal use of the device not being as a siphon.
440,	for float arm operated valve associated with a U-shaped inlet, usually mounted in a tank.

592	.. Inlet internally extending:

This subclass is indented under subclass 590. Systems in which the internally extending pipe is a fluid inlet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

434+,

for float arm operated valves mounted on flush tank inlets, especially subclasses 437, 438, 440, and 442+.

SEE OR SEARCH CLASS:

220,	Receptacles, subclasses 86.1+ for inlet attachments for receptacles.

593	. Head-establishing standpipe or expansion chamber (e.g., surge tanks):

This subclass is indented under subclass 561. Systems comprising an expansion chamber or a vertically extending pipe or tank adapted to be placed in open communication with a source of liquid and functioning as a storage or pressure-maintaining reservoir or to increase the head against which liquid from the source must exert pressure.

(1) Note. This subclass includes patents for extensions attached to the vertical outlets of irrigation pipelines whereby a greater head of water to be discharged may be maintained without overflow, and risers to be attached to basement drains whereby the overflow level of water backing into the drain may be raised.

SEE OR SEARCH THIS CLASS, SUBCLASS:

207,	for apparatus for suppressing surges in a liquid in which gas is trapped in a dome over the liquid.
272+,	for valved vertically extending delivery risers of the hydrant type.
568,	for distribution systems comprising pumps combined with means for reducing surge or pulsations in the liquid being pumped.
777+,	for expansible chamber devices, per se.

SEE OR SEARCH CLASS:

138,	Pipes and Tubular Conduits, subclasses 26+ for conduits combined with pressure compensators.
417,	Pumps, subclasses 540+ , for an expansible chamber type pump having fluid pulsation dampening means associated therewith.

624.11

. Programmer or timer:

This subclass is indented under subclass 561. Subject matter in which an actuating means provides (1) a continuously repetitive operation of one or more valves, (2) a single cycle of operation terminating in a position to restart an additional cycle, which cycle is more complex than a mere opening and closing of a single valve, or (3) a valve operation brought about at a particular time of day, or after a particular time delay period, following initiation of a nonfluid timer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

169,	for cyclic gas pressure control of liquid feed traps to boilers.
387,	for washing machine cycle control by level responsive means.

SEE OR SEARCH CLASS:

62,	Refrigeration, subclass 231 for time or program actuation of a refrigeration device.
110,	Furnaces, subclass 55 for timer control of a furnace door.
119,	Animal Husbandry, subclasses 51.11+ for a timer controlled feeding device.
126,	Stoves and Furnaces, subclass 285.5 for a timer controlled damper.
210,	Liquid Purification or Separation, subclasses 138+ for timer controlled liquid treatment and subclasses 141+ for programmer controlled liquid treatment.
222,	Dispensing, subclasses 14+ for a dispenser having a cut-off operated by a selectively preset volume or rate of flow responsive mechanism, and subclasses 638+ for a timer controlled dispenser. Class 222 takes those patents which significantly claim a supply container.
239,	Fluid Sprinkling, Spraying, and Diffusing, subclass 66 for serially operated means distributing fluid to a diffuser, and subclasses 67+ for selectively preset means serving to cut off flow to a diffuser.
251,	Valves and Valve Actuation, subclasses 48+ for a fluid dashpot, controlled valve or fluid controlled valve timer.
431,	Combustion, subclasses 18+ for a burner assembly having a timer, programmer, or condition responsive control.

624.12

.. With independent valve controller:

This subclass is indented under subclass 624.11. Subject matter with means utilized for valve control independent of the programmer or timer.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclass 289 for a valve actuatable from any of a plurality of positions.

624.13

.. Repeating cycle:

	This subclass is indented under subclass 624.11. Subject matter in which the actuating means is capable of causing a cycle of operation of one or more valves to be repeated.

624.14

... Self-cycling:

This subclass is indented under subclass 624.13. Subject matter powered by the fluid controlled by the valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

132+,	for a periodically operated siphon.
386+,	for a liquid level responsive or maintaining system where the control is related to an accumulated quantity of the main flow.
396+,	for a tank which empties itself as often as filled to a given level.

SEE OR SEARCH CLASS:

73,	Measuring and Testing, subclasses 232+ for a material operated expansible chamber self cycling valve in a meter.

624.15

... Variable:

	This subclass is indented under subclass 624.13. Subject matter in which means is provided for changing the cycle of operation.

624.16

.... Attachable and removable element:

	This subclass is indented under subclass 624.15. Subject matter in which the change is brought about by either attaching or removing an element of the device.

624.17

.... Adjustable cam:

	This subclass is indented under subclass 624.15. Subject matter in which the change is brought about by shifting the position of a cam element with respect to another portion of the device.

624.18

.. Plural, sequential, valve actuations:

	This subclass is indented under subclass 624.11. Subject matter in which the actuating means causes sequential operations of a single valve or an operation of each of a plurality of valves in sequence.

624.19

... Plural trips or trip actuations:

This subclass is indented under subclass 624.18. Subject matter in which the valve or valves, are each biased toward one position and are latched against the bias, and a trip or trips, are controlled for releasing the latch.

(1) Note. Where a single trip is involved, the trip must be operated a plurality of times.

624.2

... Variable cycle:

	This subclass is indented under subclass 624.18. Subject matter in which the sequential operations complete a single cycle of operation (e.g., open and close a valve) and means is provided for changing the cycle.

624.21

.. Clock alarm mechanism controlled:

	This subclass is indented under subclass 624.11. Subject matter in which the actuating means includes the alarm mechanism of an alarm clock.

624.22

.. Biased latch, cam operated:

This subclass is indented under subclass 624.11. Subject matter including means biasing the valve in one direction, biased means latching the valve against its bias, and a cam for moving the latching means against its bias to free the valve for movement under its bias.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 66+ for a biased valve latched against the bias and having means to trip the latch so as to release the valve.

624.27

. Line condition change responsive release of valve:

	This subclass is indented under subclass 561. Device wherein an impediment means is provided to maintain a valve in one position of adjustment, and wherein a means responsive to a change in the fluid condition is effective, upon such change, to remove or disable the impediment means or to override its holding action to permit movement of the valve from the one position.

625	. Multi-way valve unit:

This subclass is indented under subclass 561. Subject matter in which a single valve controlling communication with three or more flow lines, has its actuator or actuator so arranged or related as to determine or aid in the determination of the relative order, duration or magnitude of flow through each of the several flow lines.

(1) Note. See the class definition, Lines With Other Classes and Within this Class, (2) Plural Valves, and Subclass References to the Current Class, for collected search notes on plural actuators for valves and actuators for plural valves.

SEE OR SEARCH THIS CLASS, SUBCLASS:

15.21,	for a process of assembling, disassembling, or repairing a multi way valve or valve member.
506,	for plural condition responsive valves, at least one of which has a separate reactor surface.
512+,	for plural condition responsive valves of the direct acting type.
561+,	for distribution systems involving plural valves, with or without their actuators, in combination with flow containing means more extensive than that required to mount the valves.

625.11

.. Sequential distributor or collector type:

	This subclass is indented under subclass 625. Devices in which a valve unit has a number of outlet ports and a lesser number of inlet ports, usually one, or a number of inlet ports and a lesser number of outlet ports, some of the ports being opened or closed as others close or open.

625.12

.. Sequentially progressive opening or closing of plural ports:

	This subclass is indented under subclass 625. Devices in which a plurality of ports are sequentially progressively opened or closed by a valve unit.

625.13

... With subsequent closing of first port:

	This subclass is indented under subclass 625.12. Devices in which the first opened port is subsequently closed by continued movement of the valve unit.

625.14

.... Flow combining with flow dividing:

	This subclass is indented under subclass 625.13. Devices comprising two or more inlets or admissions passages and two or more outlets or discharge passages wherein there is flow combining followed by flow dividing.

625.15

.... Rotary:

	This subclass is indented under subclass 625.13. Devices which comprise valve units which only rotate.

625.16

..... Plug:

	This subclass is indented under subclass 625.15. Devices comprising rotary plugs.

625.17

.. Selective reciprocation or rotation:

	This subclass is indented under subclass 625. Devices in which control of flow passages may be obtained by reciprocation or rotation of the valve.

625.18

.. Plural noncommunicating flow paths:

	This subclass is indented under subclass 625. Devices having a plurality of distinct conduits or passages, flow through which is so controlled by a single valve unit that flow lines never unite.

625.19

... Rotary plug:

This subclass is indented under subclass 625.18. Devices wherein the valve unit is of the rotary type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

587+,

for tank systems where one passage is a vent.

625.2

.. Supply and exhaust:

This subclass is indented under subclass 625. Devices comprising a flow line controlled by a valve unit which has a passage connectible between atmosphere and the downstream portion of the line, whereby that portion may be completely drained or fluid therein may escape to waste.

SEE OR SEARCH THIS CLASS, SUBCLASS:

307+,	for similar structure in hydrant valves.
589,	and 596+, for systems which are vented or drained.

625.6

... Pilot-actuated:

This subclass is indented under subclass 625.2. Device in which the valve unit is actuated by a fluid pressure motive means controlled by an auxiliary or pilot valve.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 25+ for pilot valve controlled fluid actuated valves.

625.61

.... Variable orifice-type modulator:

This subclass is indented under subclass 625.6. Device wherein the valve actuating mechanism is connected to a fluid pressure line and responsive to pressure differentials therein to move the valve, and wherein the pilot includes a constantly discharging opening connected to the line, and a modulating restrictor adjacent the opening and movable to and from the opening to vary the rate of flow and modify the pressure to thereby actuate the valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

83,	for a jet control modulator, per se.

625.62

..... Opposed orifices; interposed modulator:

	This subclass is indented under subclass 625.61. Device having two lines, each having an opening discharging toward the other, and wherein the restrictor is located between the orifices and movable to lower the pressure in one line and increase the pressure in the other.

625.63

.... Common to plural valve motor chambers:

	This subclass is indented under subclass 625.6. Device in which a single pilot valve controls a plurality of valve actuating motor chambers.

625.64

.... Electric:

	This subclass is indented under subclass 625.6. Device in which the pilot valve is operated by electric motive means.

625.65

... Motor-operated:

	This subclass is indented under subclass 625.2. Device in which the valve unit is operated by a power driven actuating mechanism.

625.66

.... Fluid motor:

	This subclass is indented under subclass 625.65. Device in which the motor is actuated by a fluid.

625.21

... Rotary valve:

	This subclass is indented under subclass 625.2. Devices in which the valve unit rotates.

625.22

.... Plug type:

	This subclass is indented under subclass 625.21. Devices in which the valve unit is a rotary plug.

625.23

..... For plural lines:

	This subclass is indented under subclass 625.22. Subject matter wherein a plurality of lines downstream of the valve will be drained.

625.24

..... Axial and radial flow:

This subclass is indented under subclass 625.22. Subject matter having radially and longitudinally extending passages in the plug.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclass 310 for plugs with axial and radial flow in a single flow line.

625.25

... Reciprocating valve:

	This subclass is indented under subclass 625.2. Devices wherein the valve unit reciprocates rectilinearly.

625.26

.... Combined disk or plug and gate or piston:

	This subclass is indented under subclass 625.25. Devices wherein the valve unit comprises a disk or plug for controlling one port and a gate or piston for controlling another port.

625.27

.... Plural disk or plug:

	This subclass is indented under subclass 625.25. Devices wherein the valve unit comprises a plurality of disk or plug faces, each controlling a different port.

625.67

.... Piston valve:

	This subclass is indented under subclass 625.25. Device wherein the valve unit is a reciprocating piston.

625.68

..... With internal flow passage:

	This subclass is indented under subclass 625.67. Device wherein the piston has a flow passage within it for the line fluid.

625.69

..... With annular passage (e.g., spool):

	This subclass is indented under subclass 625.67. Device wherein an annular exterior flow passage for the line fluid is provided between adjacent seat engaging heads.

625.28

.. Dividing into parallel flow paths with recombining:

This subclass is indented under subclass 625. Devices comprising a single inlet or admission passage and a single outlet or exhaust passage, the passages being joined by a plurality of flow lines or passages controlled by a valve unit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

309,	for regenerative furnace reversing valves which similarly control flow.
599.08,	for systems where flow is divided into parallel flow lines then recombined having a multi way serial valve at dividing or recombining of the flow lines.

625.29

... Valve with bypass connections:

	This subclass is indented under subclass 625.28. Devices in which the valve has connections in addition to those for the inlet and outlet to provide for dividing and recombining, e.g., a main passage with a connection for diverting flow to a device other than a valve and a connection for returning the flow to the main passage.

625.3

... With metering feature:

This subclass is indented under subclass 625.28. Devices having means to vary the flow through the parallel paths.

SEE OR SEARCH THIS CLASS, SUBCLASS:

599.04,	for system shaving flow inlets that divide into parallel flow lines then recombining having a digital flow controller.
599.05	through 599.07, for systems where flow is divided into parallel flow lines then recombining having a digital flow controller.

625.31

... Rotary:

	This subclass is indented under subclass 625.28. Devices in which the valve unit rotates.

625.32

.... Plug:

	This subclass is indented under subclass 625.31. Devices in which the valve unit is a rotary plug.

625.33

... Reciprocating:

	This subclass is indented under subclass 625.28. Devices wherein the valve has a linear motion to and from flow obstructing position.

625.34

.... Spool:

This subclass is indented under subclass 625.33. Devices having a spool type valve (i.e., two port controllers immovably mounted on a single valve stem, said controllers coacting with co-axial seats).

SEE OR SEARCH THIS CLASS, SUBCLASS:

628+,

especially subclasses 630.19+ for spool type valves having heads with relative movement with respect to each other.

625.35

..... With internal passage:

	This subclass is indented under subclass 625.34. Devices wherein one flow path is through the longitudinal axis of the spool, e.g., a hollow spool with flow therethrough.

625.36

..... Unequal heads:

	This subclass is indented under subclass 625.34. Devices having port controllers of unequal size generally to partially balance the valve.

625.37

.... Piston:

This subclass is indented under subclass 625.33. Subject matter wherein the valve is of the piston type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

538,	for line condition change responsive piston valves.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclass 190 for piston valves with means to increase the head and seat contact pressure to reduce wear upon operation.

625.38

..... With internal flow passage:

This subclass is indented under subclass 625.37. Subject matter wherein the piston provides an internal flow passage for the line fluid.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclass 325 for other piston valves providing an internal flow passage.

625.39

...... Sequential opening or closing of serial ports in single flow line:

This subclass is indented under subclass 625.38. Subject matter including sequential opening or closing of serial ports in a single flow line.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclass 210 for sequential opening or closing of serial ports without dividing and recombining the flow.

625.4

.. Multiple inlet with single outlet:

	This subclass is indented under subclass 625. Devices wherein a branched flow line has two or more controlled inlets connected to a single outlet.

625.41

... Rotary valve:

	This subclass is indented under subclass 625.4. Devices comprising a rotary valve.

625.42

.. Selective opening of plural ports:

	This subclass is indented under subclass 625. Devices in which one direction or kind of movement of the valve unit from an intermediate closed position will open one or a reduced number of a plurality of ports, and another direction or kind of movement of the valve unit will open another, the remaining, or all the ports.

625.43

.. Four port reversing valves:

This subclass is indented under subclass 625. Devices comprising four way valves having an inlet port, an outlet port and two intermediate ports, the valve being selectively movable into two positions, in one position the inlet port being connected to the first intermediate port and the second intermediate port being connected to the outlet port, and in the other position the inlet being connected to the second intermediate port and the first intermediate port being connected to the outlet port.

SEE OR SEARCH THIS CLASS, SUBCLASS:

309+,	for reversing valves, regenerative furnace type.
625.29,	for this structure when used in dividing and recombining structures.

625.44

.. Pivoted valve unit:

	This subclass is indented under subclass 625. Devices in which the valve disk or plug unit swings around the means by which it is mounted with respect to the valve seats or casing and thereby controls two or more branched flow passages.

625.45

... Gate:

	This subclass is indented under subclass 625.44. Devices in which the valve moves transversely of the controlled flow passages.

625.46

.. Rotary valve unit:

	This subclass is indented under subclass 625. Devices comprising a valve head which rotates about its axis and has a flow passage within it, and wherein two or more branched flow passages are controlled.

625.47

... Plug:

	This subclass is indented under subclass 625.46. Devices comprising a plug type body in which the flow passage has an inlet or outlet transverse to the axis of rotation and which forms a seat contacting portion.

625.48

.. Reciprocating valve unit:

	This subclass is indented under subclass 625. Devices in which the valve unit moves rectilinearly to and from seats of controlled passages and thereby controls two or more branched flow passages.

625.49

... Combined disk or plug and gate or piston:

This subclass is indented under subclass 625.48. Devices wherein the valve unit comprises a disk or plug for closing one port and a gate or piston for closing another.

SEE OR SEARCH THIS CLASS, SUBCLASS:

625.17,

for similar structure wherein the operation is by selective reciprocation or rotation.

625.5

... Plural disk or plug:

	This subclass is indented under subclass 625.48. Devices comprising oppositely facing seating surfaces for co-axially aligned seats.

626	. Plural petcocks:

This subclass is indented under subclass 561. Subject matter in which two or more valves of the type normally actuated by turning a relatively small thumb piece have means interrelating the motions of these thumb pieces.

(1) Note. The pet cocks may be arranged at different levels on a fluid receptacle to serve as a test for maximum and minimum fluid levels in the receptacle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

595,	for distribution systems having a common valve operator for valves in noncommunicating flow paths.
861+,	for distribution systems having a single inlet and plural outlets in which at least one flow control means is provided and at least two passages are controlled.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 485+ for dispensers having plural discharge outlets with interconnected or integral flow controllers.

627	. Sequential distributor or collector type:

This subclass is indented under subclass 561. Subject matter in which the plural valves are of the distributor type, i.e., comprise a number of valve-controlled outlets and a lesser number of inlets, usually one, or a number of valve-controlled inlets and lesser number of outlets, some of the valves of the larger number opening or closing as others close or open.

SEE OR SEARCH THIS CLASS, SUBCLASS:

255+,	for plural tanks with parallel flow, especially subclass 256 for sequentially filled and emptied tanks.
262,	for plural tanks comprising flow dividing compartments.
263,	and 266, for manifold type flow.
602+,	for distribution systems having plural inlets and a single outlet.
861+,	for distribution systems having a single inlet and plural outlets, in which at least one flow control means is provided and two or more passages are controlled.

SEE OR SEARCH CLASS:

123,	Internal-Combustion Engines, subclasses 449 and 450 for rotary distributing valves for fuel to internal-combustion engines.
239,	Fluid Sprinkling, Spraying, and Diffusing, subclass 66 for sprinkling and spraying devices having serial discharge.

627.5

. Sequentially closing and opening alternately seating flow controllers:

This subclass is indented under subclass 561. Devices wherein an actuator moves one valve from an open to a closed position after which the same actuator moves another valve from a closed to an open position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

627,	for sequential alternately seating valves of the mixing or distributing type.

628	. Sequentially progressive opening or closing of plural valves:

This subclass is indented under subclass 561. Subject matter in which two or more valves are so arranged or actuated that one valve starts to open or close prior to another concurrently opening or closing valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

184,	for successively opened fluid responsive valves for venting liquid in a diverse fluid containing pressure system.
625.12,	for mixing valves in which sequential flow is produced by a valve unit.

SEE OR SEARCH CLASS:

222,	Dispensing, subclass 486 for plural outlet valves in a dispenser having actuating means for variable operation of the valves.
251,	Valves and Valve Actuation, subclasses 77+ for lost motion arrangements between a single valve and its actuator.

629	.. Pressure equalizing or auxiliary shunt flow:

This subclass is indented under subclass 628. Subject matter in which the valves are located in flow passages which are connected in parallel.

(1) Note. The effect of the prior opening of one valve may be to admit fluid pressure to the down stream side of the other valve to more nearly balance the pressure acting on the same and thus reduce the effort required to open the same.

SEE OR SEARCH THIS CLASS, SUBCLASS:

513.3,	for direct response valves having a permanently open bleed port.
599.01	through 601.21, for systems dividing into parallel flow lines then recombining.

630	... One valve seats against other valve (e.g., concentric valves):

This subclass is indented under subclass 629. Subject matter in which one valve is arranged to control a passage through the other valve element.

(1) Note. The valves are frequently arranged so that they are concentric and the smaller valve, which is the first to open, seats against the larger valve.

(2) Note. Frequently, the initially opened supplemental valve is mounted on and seats against the main valve and is termed a "pilot" valve although no servo-motor action is present because the supplemental valve merely tends to partly equalize the pressures on opposite sides of the main valve so that the main valve may be opened more easily against line pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

630.21,

and 637.5, for other concentric valves.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 38+ for fluid actuated or retarded valves in which a pilot valve is seated on the motor or valve element.

630.11

.... Locomotive throttle:

	This subclass is indented under subclass 630. Systems which are disclosed, or structurally limited, for use in steam locomotives to control the feeding of steam to the motor means.

630.12

.... Gate:

	This subclass is indented under subclass 630. Systems in which at least one of the valves has a reciprocatory, rectilinear motion substantially normal to the fluid path.

630.13

.... With balancing chamber:

This subclass is indented under subclass 630. Systems in which a pilot valve controls line pressure in a separate chamber which balances, or tends to balance the pressure differential across the second opened valve.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 38+ for pilot valve controlled choked pressure type servo-motor valve actuators in which the pilot valve is seated in the motor or main valve element.

630.14

.... First valve moves second valve:

	This subclass is indented under subclass 630. Systems in which a structure rigidly connected to a first opened valve head engages structure rigidly connected to a second valve head so that continued motion of the first valve operator subsequently causes the second valve head to be positively opened.

630.15

.... Actuator moves both valves:

	This subclass is indented under subclass 630. Systems in which a continuous motion of the actuator causes the actuator to engage and open one valve and then to engage and open a second valve.

630.16

.. With subsequent closing of first opened port:

	This subclass is indented under subclass 628. Systems in which, after the sequentially actuated valves are opened, the first opened valve is closed.

630.17

... Simultaneously moved port controllers:

	This subclass is indented under subclass 630.16. Systems in which the valves are so related to each other that motion of one is necessarily accompanied by motion of the other, or others.

630.18

.. Screw-actuated differential valves:

This subclass is indented under subclass 628. Systems in which (1) at least one of the valves is screw actuated and the remaining valve or valves are biased so that as the screw is actuated one of the valves is moved to or from its seated position and further actuation of the screw in the same direction then moves the remaining valve or valves, against the bias, to or from the seated position, or (2) both valves are screw actuated by a common operator and a lost motion connection is provided between the two movable valve elements or between one of the valve elements and its screw actuator.

630.19

.. Lost motion:

This subclass is indented under subclass 628. Systems in which there is provided a lost motion connection between the actuating means and one or more of the valves so that a continuous motion of the actuating means causes first one and then other valves to sequentially open or close.

SEE OR SEARCH THIS CLASS, SUBCLASS:

630.16,

for sequentially progressive opening of plural valves with subsequent closing of the first opened passage in which there is lost motion between the actuator and the valves.

630.2

... Cam determines sequence:

This subclass is indented under subclass 630.19. Systems in which cam means, usually between the actuator and the valves, compels the sequential actuation of the valves.

SEE OR SEARCH THIS CLASS, SUBCLASS:

630.16+,

for cam actuated sequentially operated valves in which the first opened port is subsequently closed after another port has been opened.

630.21

... Rotary concentric valves:

	This subclass is indented under subclass 630.19. Systems in which the valves rotate about a common axis, one valve having relative motion with respect to and within the other, and having a lost motion connection between one of the valves and the actuator, or the other valve.

630.22

... First valve actuates second valve:

	This subclass is indented under subclass 630.19. Systems in which a subsequently operated valve is actuated by being contacted by the first or prior actuated valve, but not by the prior valve"s actuator.

635	. With preselecting means for plural valve actuator:

This subclass is indented under subclass 561. Subject matter in which a preliminary adjustment of the actuator mechanisms, not a part or its actuating motion, determines the number or sequence of valves to be actuated.

(1) Note. See the class definition, section 5 for search notes on manual valve actuating, selecting and adjusting mechanism.

636	. With selective motion for plural valve actuator:

	This subclass is indented under subclass 561. Subject matter in which one direction or kind of movement given a single actuator will operate one or a reduced number of a plurality of valves in either an opening or closing direction and another direction or kind of movement given the actuator will operate another, the remaining or all the valves in either an opening or closing direction.

636.1

.. Oppositely movable cam surfaces:

This subclass is indented under subclass 636. Devices which select by means of oppositely movable or usable cam or eccentric surfaces.

SEE OR SEARCH THIS CLASS, SUBCLASS:

599.06

through 599.07, for systems where flow is divided into parallel flow lines then recombined having a digital flow controller for separately actuated valves and their flow lines.

636.2

.. Rotation about either of two pivotal axes:

	This subclass is indented under subclass 636. Devices in which the movements are rotation of the actuator arm about either of two pivots or pivotal axes.

636.3

.. Rotation of actuator arm about its pivot and its axis:

	This subclass is indented under subclass 636. Devices in which one movement is rotation of the actuator arm about its pivot and another is rotation about its axis.

636.4

.. Reciprocation along and rotation about same axis:

	This subclass is indented under subclass 636. Devices in which the movements are reciprocation of the actuator along, and rotation of it, about its axis.

637	. Valves with separate, correlated, actuators:

	This subclass is indented under subclass 561. Subject matter in which a plurality of valves or valve groups each are provided with individual, but particularly related actuator mechanisms.

637.05

.. Correlated across separable flow path joint:

This subclass is indented under subclass 637. Subject matter wherein the valves, or valve groups, are located at opposite sides of a separable joint in the flow path, and the particular relationship between the actuators includes a feature of separability of the joint.

SEE OR SEARCH THIS CLASS, SUBCLASS:

614.02+,

for similar structure wherein the parts which cause the valves to operate are so intimately related to the separable joint structure that the joining and disconnecting action both cause simultaneous actuation of the valve.

637.1

.. Interlocked:

This subclass is indented under subclass 637. Devices having plural actuators with interlocking means therebetween, whereby the actuation of one valve is prerequisite to the actuation of another or additional valves, or whereby the opening of one valve precludes the opening of another until such time as the first opened valve has been closed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

383+,

for valves in combination with a lock or seal.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 89+ for valves with means for blocking or disabling the actuator.

637.2

.. Coaxial stems:

	This subclass is indented under subclass 637. Subject matter in which at least two independently actuable valves are provided with stem type actuators, each of which move about or along a common axis.

637.3

... Rotary:

	This subclass is indented under subclass 637.2. Subject matter in which at least one of the coaxial stem valves pivots about a fixed axis to open or close a fluid path or paths (e.g., plug valves, butterfly valves, etc.).

637.4

.... And reciprocating:

	This subclass is indented under subclass 637.3. Subject matter in which the other coaxial stem valve has a rectilinear motion with respect to its seat or port.

637.5

.... Concentric, central valve removable:

This subclass is indented under subclass 637.3. Subject matter in which a rotary plug valve is within an outer concentric, separately actuated, rotary plug valve and so constructed that the central valve may be removed for repair or other purposes without disturbing the outer valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

614.16+,

for a single flow path having plural serial valves in which one valve head provides a seat for another valve head.

594	. Plural noncommunicating flow paths:

This subclass is indented under subclass 561. Systems involving two or more fluent material flow lines which do not unite within the scope of the combination of elements claimed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

87.01+,	for systems involving plural noncommunicating flow paths with automatic control of one flow path in accordance with a condition in the other flow path.
127,	for plural siphons discharging in parallel from plural tanks.
255+,	for plural tanks with parallel outflows.
625.18+,	for valve units having noncommunicating flow paths.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 129+ for dispensers having plural sources.
239,	Fluid Sprinkling, Spraying, and Diffusing, subclasses 418+ for fluid distributors having separately supplied plural flow paths, the fluids combining downstream of the outlet, and subclass 549 for a distributor having plural outlet, each supplied by a separate fluid, the distributor being of general utility even though disclosed as a burner.

595	.. With common valve operator:

This subclass is indented under subclass 594. Systems having at least one valve in each of two or more noncommunicating flow lines, the valves in the noncommunicating flow lines being connected to a single operating means so as to be operated thereby.

SEE OR SEARCH THIS CLASS, SUBCLASS:

601.01	through 601.12, for systems dividing into parallel flow lines then recombining including valves having a common operator therefor.
607,	for systems having a multiple inlet having a flow control valve in each inlet having a common valve operator.
627,	for systems having a sequential distributor or collector type.
627.5,	for systems having a sequentially closing and opening alternately seating flow controllers.
628	through 630.22, for systems having a sequentially progressive opening or closing of plural valves.
862	through 871, for systems having flow control means for branched passages including a common valve operator.

596	. Supply and exhaust:

This subclass is indented under subclass 561. Device comprising a valve controlled flow line and valve controlled exhaust passage connected to the line downstream of the flow control valve, whereby the supply through the flow line may be cut off and the downstream portion of the line may be drained through the exhaust passage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

61,	for low temperature responsive supply and exhaust.
62,	for low temperature responsive drains.
74,	for drain outlets with heat fusible closures.
102+,	for supply and exhaust type self-correlating systems, especially subclass 107 for waste valves responsive to flow stoppage.
143,	for vent type siphon breakers.
216+,	for air vents in liquid flow line for back flow prevention.
226,	for coaxial inflation and relief valves for pressure controlled tire inflation.
281,	and 302+, for supply and exhaust valves associated with hydrants.
312+,	for apparatus for collecting leakage or drip.
570,	and 733+, especially subclasses 735+ and 738+ for drain valves mounted on well pipes and similar valve mountings.
589,	for outlet lines extending downwardly from a valve and vented for draining.
599.01	through 601.21, for systems dividing into parallel flow lines then recombining.
625.2+,	for valve units of the supply and exhaust stop and vent or drain types.
627.5,	for supply and exhaust valves having an intermediate position in which both valves are closed.
631+,	for valves with cyclic action or actuators, and see the search notes to subclass 631.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 424.5+ for measuring traps of the stationary type which are filled and drained through multiple or multiway valves.
251,	Valves and Valve Actuation, appropriate subclasses, especially subclasses, 23, 89, 94, 110 for valves of the stop and waste, stop and vent, or drain types.

596.12

.. With bypass:

This subclass is indented under subclass 596. Device including an additional valve to connect the upstream side of the main valve directly to exhaust so that the fluid does not pass through a downstream port of the main valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

599.01

through 601.21, for systems dividing into parallel flow lines then recombining.

596.13

... Controlled by supply or exhaust valve:

	This subclass is indented under subclass 596.12. Device wherein the supply and exhaust valve controls the fluid flow to or through the by-pass valve.

596.14

.. Pilot-actuated:

This subclass is indented under subclass 596. Device in which the valves are actuated by fluid pressure motive means controlled by an auxiliary or pilot valve.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 25+ for pilot valve controlled fluid actuated valves.

596.15

... Common to plural valve motor chambers:

	This subclass is indented under subclass 596.14. Device in which a single pilot valve controls a plurality of valve actuating motor chambers.

596.16

... Electric:

	This subclass is indented under subclass 596.14. Device in which the pilot valve is operated by electric motive means.

596.17

.. Motor:

	This subclass is indented under subclass 596. Device in which a valve is operated by a power driven actuating means.

596.18

... Fluid motor:

	This subclass is indented under subclass 596.17. Device in which the motor is actuated by a fluid.

596.1

.. Biased exhaust valve:

	This subclass is indented under subclass 596. Devices in which the exhaust valve is biased toward one of its positions.

596.2

... Biased closed:

	This subclass is indented under subclass 596.1. Devices in which the exhaust valve is biased to closed position.

597	. Multiple inlet with multiple outlet:

This subclass is indented under subclass 561. Systems comprising a fluent material branched flow line having two or more inlets or admission passages and two or more outlets or exhaust passages, such admission passages and exhaust passages being joined by one or more fluent material flow lines, i.e., flow combining followed by flow dividing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

563+,	for closed circulating systems which may be comprised of plural inlets, outlets and connecting flow lines.
599.03	through 599.04, for systems having inlets where one or more flow lines divide into parallel flow lines then recombine.
625+,	for valve units having similar passages.

598	. Hydraulic brake line (e.g., hill holders):

This subclass is indented under subclass 561. Systems comprising a liquid flow passage between the master cylinder and the brake or slave cylinder, including means in the line to control the flow of fluid between said cylinders.

(1) Note. This is essentially a residual subclass for systems not provided for in Class 303, Fluid-Pressure and Analogous Brake Systems, and Class 60, Power Plants, subclasses 54.5+, and consists principally of flow control means, generally termed "hill holders", which trap a column of liquid in the brake line to maintain the brake cylinder in its expanded position with the brakes engaged, together with means to permit an increase in the volume of the trapped liquid to intensify the braking effort.

SEE OR SEARCH CLASS:

303,	Fluid-Pressure and Analogous Brake Systems, appropriate subclasses for braking systems of the fluid pressure type. See (1) Note.

599.01

. Dividing into parallel flow paths with recombining:

This subclass is indented under subclass 561. Subject matter comprising a fluent material branched flow line having a single inlet or admission passage and a single outlet or exhaust passage, wherein the admission and the exhaust passages are being joined by two or more flow lines or valved controlled flow passages.

(1) Note. All the parallel flow passages may not be open simultaneously. One may even be broken or severed for a repair purpose.

(2) Note. Bypasses established for power or control purposes in the system are not considered to form a parallel flow line within the flow system.

Image 1 for class 137 subclass 599.01

Figure 1: A typical example of the subject matter. A -Feed pipe with free end "B"; C - Discharge pipe with free end "D";E - Joint for connecting pipe "A" and "C"; F - Connecting flange(feed pipe); G - Connecting flange (discharge pipe); H - Branchpipes (feed); J - Branch pipes (discharge).

SEE OR SEARCH THIS CLASS, SUBCLASS:

89,	for mixture condition maintenance or sensing, self-correlating, or correlating system where flow is divided and recombined.
110,	for a self proportioning or correlating system for a self-controlled branched flow system dividing and recombining.
115.01	through 115.28, for a self-correlating or correlating system having a bypass controlled by a main line condition.
170.5,	for a diverse fluid containing pressure systems having a foam control in gas liquid having a conditioning trap or chamber for recarbonization.
170.6,	for a diverse fluid containing pressure systems having a foam control in gas liquid having a conditioning trap or chamber including a bypass.
171	through 204, for a diverse fluid containing pressure systems having fluid separating traps or vents.
247.29,	for a liquid seal in liquid flow line where flow liquid forms a seal in divided and recombined passages.
462,	for a line condition change responsive valve having a safety cutoff reset by a pressure equalizing valve or bypass.
563	through 564.5, for systems having a closed circulating system.
569,	for systems having a pump and a bypass for it.
596.12	through 596.13, for systems involving a pump bypass controlled by supply and exhaust valves.
625.28	through 625.39, for systems dividing into parallel flow lines then recombining having a multi way valve unit.
629	through 630.15, for systems having sequentially opening or closing of plural valves for pressure equalizing or auxiliary shunt flow.
801,	for nozzles, spouts and terminal deflectors the mounting of which may involve a spider or bar in the flow line.

SEE OR SEARCH CLASS:

138,	Pipes and Tubular Products, subclasses 40 through 46for a flow line restrictor that may involve dividing the line longitudinally.
166,	Wells, subclass 148 for a well conduit with a controllable passage between central chamber and space below a packer having an upwardly biased check valve and means for opening or bypassing it.
222,	Dispensing, subclass 318 for a discharge assistant having a bypass or return to supply or subclass 443 for a discharge assistant having a trap chamber cut off and a bypass or free flow adjustment.
251,	Valves and Valve Actuation, subclasses 12 through 63.6for a valve actuated or retarded by fluid, especially subclass 51 for a retarder or timer controlled by a line pressure connected dashpot or choke chamber having a choke bypass or relief means, or subclass 55 for a retarder or timer controlled dashpot or choke chamber having a choke bypass or relief means.

599.02

.. With fluid coupling (e.g., railway car hose coupling, truck-trailer oil system coupling, etc.)

This subclass is indented under subclass 599.01. Subject matter comprising a self-sealing device or a separable flow joint wherein steam or air intervenes between moving members to transmit pressure and torque or a joint for a conduit adapted to carry steam or air under pressure such that the escape of steam or air from the conduit is prevented when the joint is made or broken.

(1) Note. It is a device to couple or uncouple section of the conduit without loss of the fluid.

(2) Note. Included in this subclass are patents wherein steam or air is used between cars of a train comprising a receiving portion and an inserting portion, wherein the inserting portion operates the means for opening or closing a valve of cooperating coupling as the inserting portion is received by the receiving portion of the cooperating coupling.

Image 1 for class 137 subclass 599.02

Figure 1: A typical example of the subject matter. A -Pair of complimentary members; B - Coupler heads; C - Fasteningbolts; D - Stems; E - Steam pipes or hose connections; F - Passagewith branches "G" and "H"; G, H - Branches; J - Head seats snuglyin socket "L"; K - Expansion springs; L - Socket; M - Valve; N -Valve seat.

SEE OR SEARCH THIS CLASS, SUBCLASS:

614	through 614.06, for couplings having a valve in each of separable flow sections.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 149 through 149.7for a valve operated by joining flow path sections or subclass 149.8 for a valve operated by the motion of a flow path.
285,	Pipe Joints or Coupling, subclasses 65 through 79for a coupling having identical halves (e.g., railway car hose coupling, etc.) or subclass 99 for a coupling with a fluid pressure seal having a coacting opposing duplicate.

599.03

.. System having plural inlets:

This subclass is indented under subclass 599.01. Subject matter comprising a system having two or more entrance flow lines wherein at least one entrance flow passage is divided and recombined.

Image 1 for class 137 subclass 599.03

Figure 1: A typical example of the subject matter. A - Showervalve system; B - Selector valve; C, D - Inlets; E - Outlet; F,G - Flow control valves; H - Flow inlet; J - Bypass inlet; K - Valvedisc element; L - Valve body; M, N - Pair of opposite ports; P,Q - Pair of opposite ports; R - Valve operating handle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

597,	for systems having a multiple inlet with a multiple outlet.
602,	for systems having a multiple inlet with a single outlet.

SEE OR SEARCH CLASS:

366,	Agitating, subclasses 177.1 through 181.8for plural related feeders having separate outlets to a mixing chamber.
454,	Ventilation, subclasses 261 through 269for a ventilation system having an inlet airway including a structure for mixing plural air streams together.

599.04

... Having digital flow controller:

This subclass is indented under subclass 599.03. Subject matter wherein at least one of the parallel flow paths provide a specific flow rate controlled by a valve which is completely open or closed (the valve itself provides no adjustable metering). (1) Note. This subclass includes a flow controller that can be manually set to a numerical value. (2) Note. The flow rate determining means can be a serial restrictor or restricting means in the valve itself.

Image 1 for class 137 subclass 599.04

Figure 1: A typical example of the subject matter. A, B- Two sources of binary gas mixtures; C, D - Pressure reducing valves;E - Stabilizing unit; F - Unit for setting proportion between gasmixture from unit "E"; G - Main mixer; H - Controller; J, K - Orificeplates; L - Additional mixer; M - Controller to effect stabilizationof gas pressure upstream of final control element; N - Distributor;P, Q - Two sets of capillary tubes "R"; R - Capillary tubes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

556	through 556.6, for a position or extent of a motion indicator element rigidly carried by the movable element whose position is indicated.
625.3,	for systems having a multi way valve unit where flow is divided into parallel flow lines then recombined including a metering feature.
886,	for systems having flow control means for branched passages including a threaded actuator.

SEE OR SEARCH CLASS:

91,	Motors, Expansible Chamber Type, subclass 31 wherein the fluid is supplied through diverse paths to a single expansible chamber and wherein one path includes restriction.
128,	Surgery, subclass 205.24 for a respiratory means or method having a mixing treating agent with a respiratory gas having a valve or valve control structure.
166,	Wells, subclass 91.1 for an above-ground apparatus with flow restrictors (e.g., chokes, beans, etc.).
251,	Valves and Valve Actuation, subclass 117 for a valve with restrictor in parallel to a main valve or subclass 118 for a material guide or restrictor.

599.05

.. Having digital flow controller:

This subclass is indented under subclass 599.01. Subject matter wherein at least one of the parallel flow paths provide a specific flow rate controlled by a valve which is completely open or closed (the valve itself provides no adjustable metering).

(1) Note. The flow rate determining means can be a serial restrictor or restricting means in the valve itself.

(2) Note. This includes a flow controller that can be manually set to a numerical value.

SEE OR SEARCH CLASS:

91,	Motors, Expansible Chamber Type, subclass 31 wherein the fluid is supplied through diverse paths to a single expansible chamber and wherein one path includes restriction.
128,	Surgery, subclass 205.24 for a respiratory means or method having a mixing treating agent with a respiratory gas having a valve or valve control structure.
166,	Wells, subclass 91.1 for an above ground apparatus with flow restrictors (e.g., chokes, beans, etc.).
251,	Valves and Valve Actuation, subclass 117 for a valve with restrictor in parallel to main valve or subclass 118 for a material guide or restrictor.

599.06

... Having plural branches under common control for separate valve actuators:

This subclass is indented under subclass 599.05. Subject matter comprising two or more unique flow restriction passageways, a valve associated with each passageway, and a single control for selectively opening any one of the valves and maintaining each additional valve closed.

(1) Note. The single control can be a single actuator physically connected to separate valves or a central control means connected to physically independent valve actuators.

Image 1 for class 137 subclass 599.06

Figure 1: A typical example of the subject matter. A -Main header; B - Supply pipe; C - Filter; D - First riser; E - Pipecoupling; F - Meter or indicator; G - Pipe coupling; H - Discharge pipe;J - Second riser. Note: Main header "A" is connected to risers"D" and "J" by various orifices and shutoff valves.

SEE OR SEARCH THIS CLASS, SUBCLASS:

636.1,

for systems having selective motion for plural valve actuator having oppositely movable cam surfaces.

SEE OR SEARCH CLASS:

138,	Pipes and Tubular Conduits, subclass 46 for a flow regulator or baffle having variable restriction.
251,	Valves and Valve Actuation, subclasses 121 through 122for an adjustable material guide or restrictor.
604,	Surgery, subclass 246 means for controlling or metering a predetermined dose or amount of treating material introduced or removed through a conduit, holder, or implantable reservoir inserted in a body from a body orifice, or inserted or removed subcutaneously, other than by diffusing through skin, for therapeutic purposes (e.g., medicating, irrigating, aspirating, etc.).

599.07

.... Electromagnetic or electric control (e.g., digital control, bistable electro control, etc.):

This subclass is indented under subclass 599.06. Subject matter wherein at least one valve is operated by electricity.

(1) Note. The electric signals can be direct to solenoid actuators or indirect, such as through solenoid pilot valves.

Image 1 for class 137 subclass 599.07

Figure 1: A typical example of the subject matter. Valvehousing formed of recessed parts "B" and "C"; B, C -Recessed partssealed by bolts "M"; D - Electromagnets composed of "E", "F", and"G"; E - Coil body; F - Armatures; G - Coil windings; H - Flow channels;J - Sub-chambers; K - Inlet; L - Outlet; M - Sealing bolts; N -Planner plates for passages "P"; P - Passages; Q - Tubular stems;R - Spaced recessed circular plates.

SEE OR SEARCH THIS CLASS, SUBCLASS:

601.14,	for systems dividing into parallel flow lines then recombining having an electrical valve actuator.
883,	for systems having a single inlet and flow control means for branched passages having multiple distinctly valved outlets.
884,	for systems having a flow control means for branched passages in a sectional block structure.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 30.01 through 30.05for a fluid actuated or retarded valve controlled by an electrically actuated pilot valve, subclass 65 for a permanent or constantly energized magnet actuator, subclass 129.05 for an electrically actuated valve having means to produce digital pulses, or subclasses 129.15-129.22 for an electrically actuated valve including a solenoid.
335,	Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, subclass 234 for a magneto mechanical motive device (e.g., electromagnet having an armature, etc.) having a permanent magnet, a polarized electromagnet, and a reversible magnetic flux-type movement (e.g., bistable type, etc.).

599.08

.. With multi way valve having serial valve in at least one branch:

This subclass is indented under subclass 599.01. Subject matter comprising a single flow regulating or controlling element at a point where plural lines divide or recombine and further includes additional flow regulating or controlling elements in at least one of the parallel flow paths.

Image 1 for class 137 subclass 599.08

Figure 1: A typical example of the subject matter. A - Spoolelement; B, C - Lands slidably mounted in "D" of housing "E"; F- Inlet passage with branches "T" and "S"; G - Outlet passage; H,J - Parallet main orifices; K - Variable secondary orifice in serieswith "L"; L - Passage; M - Serial valve with lands "N" and "P";N, P - Lands; Q, R - Valve bores; S - Branch leading to valve bore"D".

SEE OR SEARCH THIS CLASS, SUBCLASS:

613	through 614.21, for system shaving a flow path having serial valves or closures.
625.12	through 625.16, for a multi way valve with sequentially progressive opening or closing of plural lines.
625.28	through 625.39, for systems dividing into parallel flow lines then recombining having a multi way valve unit.

SEE OR SEARCH CLASS:

91,	Motors, Expansible Chamber Type, subclasses 32 through 33for fluid supplied through diverse paths to a single expansible chamber where activation of one path disables a second path.

599.09

.. Fluid pressure regulator in at least one branch:

This subclass is indented under subclass 599.01. Subject matter wherein at least one flow passageway includes a biased open valve that is responsive to its outlet pressure in a manner that tends to maintain a constant outlet pressure.

Image 1 for class 137 subclass 599.09

Figure 1: A typical example of the subject matter. A - Valvecasing; B - Inlet; C - Outlet; D - Passage (communicates with "B"and "C"; E - Valve body; F -Pressure governor valve; G - Controlrod; H - Valve seat; J - Piston; K - Chamber for sliding "J"; L- Spring (acts on valve body "E" through piston "J" and rod "G";N - Pressure governing screw; P - Flow control valve; Q - Valvebody; R - Valve seat; S - Pressure source; T - Direction switchvalve; V - Check valve; W - Throttle valve with pressure compensator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

315.04	through 315.05, for a fluid handling system with repair, tapping, assembly, or disassembly means for a pressure regulator, pressure-regulating valve, or reducing valve.
488	through 492.5, for a line condition change responsive fluid pressure type pilot or servo controlled valves.
505	through 505.47, for a line condition change responsive valve having a separate connected fluid reactor surface with an opening bias (e.g., pressure regulator, etc.).
510,	for a line condition change responsive valves with separate connected fluid reactor surface valve seating in direction of flow having a flexible diaphragm or bellows reactor.

SEE OR SEARCH CLASS:

165,	Heat Exchange, subclass 285 for a flow of one heat exchange material controlled by the pressure of another, subclass 286 for flow of one heat exchange material controlled by its own pressure, subclass 299 for flow of one heat exchange material controlled by temperature of another, or subclass 300 for flow of one heat exchange material controlled by its own temperature.
237,	Heating Systems, subclass 65 for a water heating system having a pressure regulator.

599.11

.. Flow passage with bypass connection:

This subclass is indented under subclass 599.01. Subject matter comprising a pipe or conduit, in addition to those for inlet and outlet, for diverting the flow to a device other than a valve and a connection for returning the flow to the main pipe or conduit.

Image 1 for class 137 subclass 599.11

Figure 1: A typical example of the subject matter. A - Supportbase; B - Chamber; C - Nipple carries valve housing "D"; D - Housingfor valve mechanism; E - Hollow stem connected to chamber "F"; F- Cleaning agent chamber (other device) with pervious receptacle "T";G - Fluid inlet; H - Nozzle with discharge orifice "J"; J - Dischargeorifice; K - Mixing chamber; L - Ball check valve; M - Containeroutlet; N - Valve controlled conduit; P - Dispensing nozzle; Q -Flexible hose; R - Nozzle "P" perforations; S - Manually operatedrestrictor; T - Pervious receptacle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

565.01	through 565.36, for a fluid system having a pump.
625.28	through 625.39, for systems having multi way valve unit having divided parallel flow paths with recombining.

SEE OR SEARCH CLASS:

73,	Measuring and Testing, subclass 204.21 for a thermal type volume or rate of flow measuring with fluid flow deflector or restrictor (e.g., baffle, constriction, etc.).
138,	Pipes and Tubular Conduits, subclasses 40 through 46for flow regulators or baffles with restrictors.
165,	Heat Exchange, subclass 103 for an adjuster for a branched flow for heat or exchange material having a bypass of heating or cooling means.
210,	Liquid Purification or Separation, subclass 434 for divided filtered and unfiltered liquid passages including recombining.

599.12

... Including mixing feature:

This subclass is indented under subclass 599.11. Subject matter wherein at least one branch includes a device or arrangement for adding another fluid to the branch fluid.

Image 1 for class 137 subclass 599.12

Figure 1: A typical example of the subject matter. The fluidflows from right to left through main conduit "A" and out of a nozzle"B". A by-pass conduit "D" is connected to inlet "C" and the mainconduit "A". A chemical mixture "E" is disposed in the by-pass conduit"D". A conduit "F" is connected between mixing solution tank "G"and the mixture "E". "H" (a power mixture) together with the controlvalve "J" further regulates amount of liquid by-passed.

599.13

... Including flowmeter:

This subclass is indented under subclass 599.11. Subject matter wherein at least one branch includes an instrument for measuring the rate of fluid passing through the branch.

Image 1 for class 137 subclass 599.13

Figure 1: A typical example of the subject matter. A - Manifold;B - Inlet; C - Outlet; D - Gas meter; E - Junction stop cocks; F- Stop cock (by-pass); G - To gas service pipe; H - Gas by-passjunction. Note: The gas by-pass junction "H" fitted with a stopcock "F" interconnects with manifold "A" and this, together withthe junction stop cocks "E", enables the meter to be by-passed.

599.14

... Including cleaning, treating, or heat transfer feature:

This subclass is indented under subclass 599.11. Subject matter comprising a porous article or mass that serves as a medium for separating from a fluid passed through it, matter held in suspension, dissolved impurities or coloring matter, or means for subjecting the fluid to an agent or process, or means for moving energy in transit due to a temperature difference between the source and the sink.

Image 1 for class 137 subclass 599.14

Figure 1: A typical example of the subject matter. CLEANINGDEVICE. A - Strainer body portion; B - Fluid inlet; C - Connectionflanges; D - Strainer cartridges; E - Passageway connects "F" withinlet "B"; F - Upper chamber; G - Plug valve (controls fluid to strainer);H - Plug valve lateral passageway; J - Upper support yoke; K - Lowersupport yoke.

Image 2 for class 137 subclass 599.14

Figure 2: A typical example of the subject matter. HEAT TRANSFERDEVICE. A - Main conduit; B - Radiator (heat transfer device); C- Inlet for radiator; D - Outlet for radiator; E - Control valve;F - Electromagnetic control device; G - Thermostat.

SEE OR SEARCH THIS CLASS, SUBCLASS:

334	through 341, for systems with heating or cooling of the system.
544	through 550, for systems with means for separating solid material from the fluid.

SEE OR SEARCH CLASS:

210,	Liquid Purification or Separation, subclasses 323.1 through 347for a filter or subclass 424 for a multi way valve flow that selectively directs flow relative to the filter for the material being treated.
237,	Heating Systems, subclass 12.3 for a vehicle heat and power plant.

599.15

.... Water treatment feature:

This subclass is indented under subclass 599.14. Subject matter comprising means for subjecting water supplied for commercial and domestic use to the action of an agent or process to make it safely potable.

Image 1 for class 137 subclass 599.15

Figure 1: A typical example of the subject matter. A - Waterunder pressure; B - Treatment device inlet tubing; C - Inlet totreatment device; D - Treatment device (holds chemical); E - Flowrate valve; F - Inlet shutoff valve; G - Treatment device outlettubing; H - Outlet from treatment device; J - Outlet shutoff valve.

SEE OR SEARCH CLASS:

122,	Liquid Heaters and Vaporizers, subclasses 379 through 405for cleaning.
210,	Liquid Purification and Separation, subclasses 198.1 through 221.2with means to add treating material, or subclass 444 for a system with a filter within a flow line and the filter being suspended from a head of a casing.
422,	Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, subclass 256 for a physical type apparatus for liquid-liquid contact means for separating or dissolving a material constituent.

599.16

.. Second valve assembly carried by first valve head:

This subclass is indented under subclass 599.01. Subject matter wherein a valve head carries the head and seat of another valve.

Image 1 for class 137 subclass 599.16

Figure 1: A typical example of the subject matter. A - Fluidinlet; B - Fluid outlet; C - Movable accumulator rod; D - Yieldablefoot engages lever "E"; E - Lever; F - Valve lever pivot; G - Accumulatorcontrol valve; H - Control valve pivot; J, K - Control valve ports;L - Control valve hollow interior; M - Self contained check valve(built within valve "G"); N - Spring seated upon plug "Q"; P - Seriesof ports in check valve; Q - Plug; R - Packing gland.

SEE OR SEARCH THIS CLASS, SUBCLASS:

493.1	through 493.6, for a line condition change responsive bi-directional flow valves where one head and seat carried by head of another.
512.2,	for plural direct response valves (i.e., check valves) where one valve carries the head and seat for the second valve.

599.17

... With rotary plug having variable restrictor:

This subclass is indented under subclass 599.16. Subject matter wherein the first valve head revolves about its own axis and includes means to adjust parallel flow path.

Image 1 for class 137 subclass 599.17

Figure 1: A typical example of the subject matter. A - Firstvalve body; B - Tapered valve chamber; C - Tapered plug valve element;D - Hollow valved stem; E - Valve cap; F - Coiled spring acts uponthe valve member to keep it seated; G, H - Threaded valve body extensionwith inlet passage; J, K - Thread valved body extension with outletpassage; L, M, N, - Second orifice valve assembly; P - Axial passagein plug element to provide flow to "K"; Q - Axial passage in registrywith "H"; R, S - Variable restrictor.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclass 117 for a restrictor in parallel to a main valve or subclasses 118-127 for a material guide or restrictor.

599.18

... Carried valve is direct response valve (e.g., check valve, etc.):

This subclass is indented under subclass 599.16. Subject matter wherein the other flow regulating means comprises a device which automatically limits the flow to a single direction and is sensitive to the pressure of the fluid.

(1) Note. Since the check valve has no other actuator, its movement from a normal, neutral, or biased position is caused solely by a change in the fluid flow or pressure in the line, and the valve returns to its original position when the original condition is restored.

Image 1 for class 137 subclass 599.18

Figure 1: A typical example of the subject matter. A -Valve body; B - Valve sleeve; C - Lock nut; D - Passageway; E -Annular valve seat; F - Check valve element held against by "G";H - Boss; J - Spring retainer; K - Valve port (upstream side); L- Valve ports (downstream side); M - Annular passageway cocentricwith "D"; N, P - Shoulders serve as cooperating valve elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

511	through 543.23, for a direct response valve (i.e., check valve type).

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 402.1 through 402.25for a fluid pressure type discharge assistant wherein the valve is actuated by a nozzle or through an outlet of the valve.
417,	Pumps, subclass 296 for a condition responsive pumped fluid control where the bypass or relief valve part is carried by or carries a distributor part.

600	.. With foam controlling means (e.g., beer, soda faucets):

This subclass is indented under subclass 599.01. Subject matter having a dividing and obstructing member in the flow path to cause and/or control foaming of the fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

896+,

for foam controlling devices having plural inlet passages.

SEE OR SEARCH CLASS:

138,	Pipes and Tubular Conduits, subclasses 40+ for flow restrictors in pipes.
239,	Fluid Sprinkling, Spraying, and Diffusing, subclasses 463+ and 552 for sprayer devices having an obstructing element inserted in the fluid line for the purpose of inducing or minimizing rotation of the fluid.
251,	Valves and Valve Actuation, subclasses 118+ for valved flow passages having a restrictor in the flow passage.

601.01

.. With common operator:

This subclass is indented under subclass 599.01. Subject matter having at least one valve in each parallel flow path and wherein both valves are controlled by a single operating means.

(1) Note. The common operator can be a single actuator physically connected to separate valves or central control means connected to physically independent valve actuators.

Image 1 for class 137 subclass 601.01

Figure 1: A typical example of the subject matter. A -Housing; B - Yoke; C - Input chamber connected to "H" by passages"M", "Q", and "S"; D - Filter; E - Cylinder bore for piston "F"; F- Piston; G - Groove for "O"-ring "J"; H - Expansible chamber; J- Resilient "O"-ring for sealing chamber "C"; K - Piston rod; L- Spring disposed around "F"; M - First passage; N - Valve; P -Valve actuator; Q - Second passage; R - Spring controlled valve;S - Third passage; T, V - Valves with actuators "X" and "Y"; W - HandWheel; X, Y - Valve actuators; Z - Wall for locating "X" and "Y";AA - Common valve operator. Note (1): Valve "V" is behind valve "T".Note (2): Common valve operator "AA" selectively operates actuators"X" and "Y".

SEE OR SEARCH THIS CLASS, SUBCLASS:

599.06	through 599.07, for systems having separately actuated valves operated in common by a digital flow controller and their flow lines.
595,	for systems having plurally noncommunicating flow paths having a common valve operator.
607,	for systems having a multiple inlet having a flow control valve in each inlet having a common valve operator.
614.11	through 614.15, for systems having a flow path having serial valves or closures and a common actuator.
627,	for systems having a sequential distributor or collector type.
627.5,	for systems having a sequentially closing and opening alternately seating flow controllers.
628	through 630.22, for systems having a sequentially progressive opening or closing of plural valves.
636,	for systems having a selective motion for a plural valve actuator.
862	through 871, for systems having flow control means for branched passages including a common valve operator.

SEE OR SEARCH CLASS:

236,	Automatic Temperature and Humidity Regulation, subclass 80 for a fluid-operated motor controlled by a relay including a shunt for plural pilots having a single actuator.
431,	Combustion, subclass 90 for a timer, programmer, retarder, or condition responsive control by condition of burner feed or feed means where a sensor of one feed controls another feed.

601.02

... Balanced valve:

This subclass is indented under subclass 601.01. Subject matter wherein the flow regulating means in each branch is so related to the fluid controlled that the pressure bias imparted by the line pressure is in equilibrium with respect to opposing surfaces of the regulating means.

Image 1 for class 137 subclass 601.02

Figure 1: A typical example of the subject matter. In operation,fluid is permitted to pass through the valve by operating lever"H" to rock the shaft "D", thereby lifting each valve n n" simultaneouslyfrom its seat allowing the fluid to flow through passages o o";since the fluid pressure acts on one valve to force it against itsseat and to the other valve to force it from its seat, valves arebalanced between opposing pressures.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 281 through 283for a balanced valve.

601.03

... Single resilient member actuates or forms plural passages:

This subclass is indented under subclass 601.01. Subject matter wherein a device consisting of an element capable of returning freely to a previous position, shape, or condition operates valves in response to the control pressure in parallel flow paths or the element is a valve means for parallel flow paths.

Image 1 for class 137 subclass 601.03

Figure 1: A typical example of the subject matter. IN GENERAL.A - First conduit; B - Second conduit; C - Third conduit; D - Clampingmechanism; E - Interior passage whose wall defines a plurality ofserrations.

Image 2 for class 137 subclass 601.03

Figures 2, 3, and 4: Typical examples of the subject matter.F - "V"-shaped grooves; G - Projections; H - Flat surfaces (wallof "E" (see Figure 1) defines serrations consisting of "V"-shapedgrooves ("F") having projections ("G") and inner flat surfaces ("H"));J - Clamp body; K - Bottom wall; L - Shaft; M - Cam; N - Passages;P - Passages (Passages "N" and "P" formed due to clamping actionuntil the fluid is completely stopped); Q - Passages formed dueto clamping action for flow of fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

512.15,

for plural direct response valves provided by an integral resilient member characterized by dividing and recombining in a single flow path.

SEE OR SEARCH CLASS:

91,	Motors, Expansible Chambers Type, subclasses 514 through 516wherein the pressure responsive valve divides motive fluid between motors.
251,	Valves and Valve Actuation, subclasses 4 through 10for tube compressors.

601.04

... Valves deform to close passage:

This subclass is indented under subclass 601.01. Subject matter wherein the flow regulating means with the help of the increased external pressure alters the shape of the collapsible and expansible flow paths or conduits by varying degrees to complete closure.

Image 1 for class 137 subclass 601.04

Figure 1: A typical example of the subject matter. A - Valvehousing (exterior); B, C - Pair of flanged ends; D - Fluid lineinlet end; E, F - Fluid line flanged ends; G - Plurality of fluidtight tubes; H - tube sheets; J - Space for control fluid; K - Controlfluid inlet; L - Valve with a pump; M - Control fluid line; N- Tubewall (uniform); P - Elastomer.

Image 2 for class 137 subclass 601.04

Figures 2, 3a, 3b, and 3c: Typical examples of the subjectmatter. G - Plurality of fluid type tubes; N - Tube wall (uniform);P - Elastomer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

489	through 489.5, for a line condition responsive pilot or servo controlled valve choked or throttled fluid pressure type.

SEE OR SEARCH CLASS:

160,	Flexible or Portable Closure, Partition, or Panel, subclasses 220 through 221for movable plural strips, slats, or panels interconnected for plural relative motions.
251,	Valves and Valve Actuation, subclass 5 for fluid pressure actuated tube compressor or subclass 212 for relatively movable valve elements forming single port closure (e.g., an iris diaphragm, etc.).
454,	Ventilation, subclasses 333 through 336for an inlet airway having an adjustable valve or damper or subclasses 358-364 for an outlet airway having a readily movable air regulating louver, damper, or cover.

601.05

... Rotary valve:

This subclass is indented under subclass 601.01. Subject matter wherein at least one flow regulating means includes the head which turns or revolves about its axis to open and close the regulating means. (1) Note. Valves having rotary actuator motion to reciprocate a valve or compound rotary and reciprocal motions (helical or screw thread) are found in other appropriate subclasses under 601.01.

Image 1 for class 137 subclass 601.05

Figure 1: A typical example of the subject matter. A - Measuringvessel; B, C - Opposite glass walls; D - Vertical partition formingchambers "E" and "F"; G - Cock; H - Tapping-cock; M - Handle whichoperates both "G" and "H". Note: Handle "M" is fixed to the key"I" and passes through slot "K" in the key "L".

SEE OR SEARCH THIS CLASS, SUBCLASS:

625.31,	for systems characterized by dividing into parallel flow paths with recombining having a rotary multi way valve.
865,	for flow control means for branched passages with a gear operated common valve operator that may be rotary.

601.06

.... Including rigid plate with flexible or resilient seal:

This subclass is indented under subclass 601.05. Subject matter wherein the valve head is made of a substantially flat plate and having an element which is intended to stop leakage between the plate and an adjacent plate or the housing of the valve and wherein the element comprises material that deflects under pressure or under force exerted during the operation of the valve, but returns to its original state when the pressure or force is removed.

Image 1 for class 137 subclass 601.06

Figure 1: A typical example of the subject matter. A - Damperblades; B - Linkage mechanism to operate "A"; C - Seals.

601.07

.... Axes of rotation of valves intersect at point:

This subclass is indented under subclass 601.05. Subject matter wherein a straight line about which each flow regulating means of a plurality of flow means is conceived to revolve, cut into one another to share a narrow, localized spot.

Image 1 for class 137 subclass 601.07

Figure 1: A typical example of the subject matter. A - Valvehousing; B - Mounting holes; C - Outer peripheral surface; D - Innerperipheral surface; E, F, G, H - Rotatable shims, each occupiesa space between corresponding vanes J, K, L, and M; J, K, L, M- Connected vanes; N, P - Vane tips rotate within hub "Q"; Q - Hub;R - Bracket carrying actuator "S"; S - Actuator; T - Plunger; V,W - Orifices for fluid inputs to control "T"; X - Shaft controlledor turned by "T"; Y - Crank. In operation, servo controller suppliesfluid to the orifices "V" and "W" so that piston within the actuator"S" is moved back and forth, controlling plunger "T" to obtain desired valveopening.

SEE OR SEARCH CLASS:

60,	Power Plants, subclasses 226.1 through 226.3for interrelated reaction motors where air and diverse fluid discharge from separate discharge outlets (e.g., fan jet, etc.).
415,	Rotary Kinetic Fluid Motors or Pumps, subclasses 77 through 79for an axial flow runner with blades extending radially inward and outward from a common annulus or subclasses 159-166 for a selectively adjustable vane or working fluid control means upstream of runner having plural and arcuately or circularly arranged around a runner axis.
431,	Combustion, subclasses 182 through 184for a plural fuel disperser means extending to a common wall opening of a furnace and a duct with air whirling means surrounds disperser.
454,	Ventilation, subclass 308 for an inlet airway including a specific air distributor (e.g., register, etc.) having vanes or elongated output slots extending radially.

601.08

.... Axes of rotation parallel:

This subclass is indented under subclass 601.05. Subject matter wherein a line about which each flow regulating means of a plurality of flow means is conceived to revolve, extends in the same direction, and is equidistant everywhere.

Image 1 for class 137 subclass 601.08

Figure 1: A typical example of the subject matter. A - Airflow regulating assembly for a burner; B - Front main plate; C -Circular center plate; D - Circular rear plate; E - Spacer rodsjoining all plates; F - Control rods; G - Secondary air vanes; H- Observation tubes; J - Tube cover; K - Flow control mechanismconsisting of operating ring "L", central rollers "M", actuatingarm "N", link "P", rack segment "Q", pinion gear "R", and crank handle"S".

SEE OR SEARCH CLASS:

165,	Heat Exchange, subclass 101 for an adjuster for heat or exchange material branched flow that controls flow through parallel heating or cooling means.
239,	Fluid Sprinkling, Spraying, and Diffusing, subclass 590.5 for a rigid fluid confining distributor having interior filter or guide and plural parallel fluid directing means.

601.09

..... Adjacent plate valves always parallel:

This subclass is indented under subclass 601.08. Subject matter wherein the flow regulating means comprising a substantially flat sheet of uniform thickness and the one immediately preceding or following are equidistant from each other.

Image 1 for class 137 subclass 601.09

Figure 1: A typical example of the subject matter. A, B- Lower and upper frame members; C - Lateral members; D - Damperblades; E - Blade shafts; F - Support member to actuate blades;G, H, J, K, L - Bell crank levers, operating links, and tie linkmechanism form a parallelogram; M - Air cylinder; N - Couplingrod connected to bell crank levers.

SEE OR SEARCH CLASS:

49,	Movable or Removable Closures, subclasses 73.1 through 123for closures interconnected for concurrent movement.
454,	Ventilation, subclasses 319 through 320for an inlet airway having a louvered air distributor including moveable plural vanes pivoting about individual axes or subclasses 335-336 for an adjustable valve (e.g., damper, etc.) having plural blades pivoting along parallel axes.

601.11

..... Adjacent plate valves counter rotate:

This subclass is indented under subclass 601.08. Subject matter wherein the flow regulating means comprising a substantially flat sheet of uniform thickness and one immediately preceding or following revolve in opposite direction to each other or move toward and away from each other.

Image 1 for class 137 subclass 601.11

Figure 1: A typical example of the subject matter. A - Damperassembly; B- Socket swivel unit; C, D - Flanges; E - Cross bar;F - Shank; G - Actuating rod element; H - Damper frame; J, K, L- Damper blades; M - Bearing pins; P, Q, R - Lateral channels; S- Bearing strap; T - Connecting rod; V - Trunion support; W - Rotatabletrunion; X - Blade actuating means.

SEE OR SEARCH CLASS:

49,	Movable or Removable Closures, subclasses 116 through 123for closures interconnected for concurrent movement having opposed similar movement.
138,	Pipes and Tubular Conduits, subclass 46 for flow regulators or baffles having a variable restriction.
454,	Ventilation, subclass 336 having an inlet airway with adjustable blades pivoting along parallel axes where adjacent blades pivot in opposing directions.

601.12

... Mechanical movement between actuator and non-rotary valve:

This subclass is indented under subclass 601.01. Subject matter wherein the significance is attributed to moving parts of the mechanism that transmit definite motion to the non-revolving component of the flow regulating means or to the regulating means itself, such that the motion provided at the input (actuator) end of the mechanism is different in direction or distance traveled that the motion at the output (valve) end of the mechanism.

Image 1 for class 137 subclass 601.12

Figure 1: A typical example of the subject matter. A - Controllercasing; B - Steam inlet chamber; C - Steam pipe; D - Exhaust chamber;E - Steam outlet; G - Non-rotary poppet valve; H - Lifting stem;J - Valve spring; K - Washer; L - Non-rotary poppet valve; M - Valve stem;N - Valve spring; P - Washer; Q - Cam shaft; R, S - Spindles affordbearing for valve levers; T - Valve lever; V - Lever support cam;W - Valve lever; X - Rotary cam.

SEE OR SEARCH THIS CLASS, SUBCLASS:

315.35	through 315.4, for a particular mechanical actuator of a valve with repair, tapping, assembly, or disassembly means.
434	through 451, for a float arm operated valve.
628	through 630.22, for systems having sequentially progressive opening or closing of plural valves.

SEE OR SEARCH CLASS:

123,	Internal-Combustion Engines, subclasses 90.1 through 90.67for various poppet valve operating mechanisms.
236,	Automatic Temperature and Humidity Regulation, subclass 1 for miscellaneous multistage multiple valve staging valve controls that may include mechanical actuating means or for miscellaneous multistage single valve staging valve controls that may include mechanical actuating means.
251,	Valves and Valve Actuation, subclasses 213 through 280for a mechanical movement actuator.

601.13

.. Fluid actuated or retarded:

This subclass is indented under subclass 599.01. Subject matter wherein the significance is attributed to a valve device in which the opening or closing movement of the valve is produced or modified by the relative force of gas, liquid, or a mixture of a solid and liquid in a flowable form acting against a portion of the valve actuating means.

Image 1 for class 137 subclass 601.13

Figure 1: A typical example of the subject matter. A - Supplyhopper; B - Resistant coating; C, D - Flanges; E - Valve body; F- Air-vacuum line; G - Compression fitting; H - "T" fitting; J -Tube; K - Tube plug; L - Perforations; M - Close fitting rubbertube; N - Flexible coupling; P - Flange; R - Pressure vessel; S- Opening in vessel; T - Three-way valve; V - Line through which vacuumis pulled; W - Air supply line. In operation, air pressure is suppliedthrough "F", "H", "J", and "L", causing the rubber tube "M" to expandinto the position shown by dotted lines, thus closing the openingin "E" and cutting off flow through "A". When "T" is opened, vacuumis pulled through "V", quickly collapsing the tube "M" against "J".

SEE OR SEARCH THIS CLASS, SUBCLASS:

15.19,

for a process of assembling, disassembling, or repairing a fluid actuated or retarded valve.

SEE OR SEARCH CLASS:

91,	Motors: Expansible Chamber Type, subclasses 418 through 470for a motive fluid valve.
222,	Dispensing, subclasses 481 through 489for plural openings or discharge guides having flow controllers or closures.
251,	Valves and Valve Actuation, subclasses 12 through 63.6for a fluid actuated or retarded valve actuating means or subclass 175 for means to increase head and seat contact by fluid pressure.
267,	Spring Devices, subclasses 64.16 through 64.21for a vehicle spring having a compressible fluid with a retarder leveling device.

601.14

.. Electrical actuator:

This subclass is indented under subclass 599.01. Subject matter wherein the position of the valve is moved by a mechanism powered by electricity, such as a solenoid, motor, or piezoelectric actuator.

Image 1 for class 137 subclass 601.14

Figure 1: A typical example of the subject matter. A - Fueltank; B - Inlet; C - "T" coupling; D - Tank drain; F - Valve stem;G - Outlet; H - Valve seat; J - Ball check valve; K - Electromagneticcoil; L, N - Conductors; M - Switch; P - Power source.

SEE OR SEARCH THIS CLASS, SUBCLASS:

66,	for a thermoelectric combustion failure responsive fuel safety cut off for burners.
599.07,	for systems having separately actuated valves operated in common by an electrically actuated digital flow controller and their flow lines.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 30.01 through 30.05for a fluid actuated or retarded valve controlled by an electrically actuated pilot valve or subclasses 129.15-129.22 for an electrically actuated valve including a solenoid.

601.15

.. Mechanical movement between actuator and valve:

This subclass is indented under subclass 599.01. Subject matter wherein the significance is attributed to moving parts of the mechanism that transmit definite motion to the component of the flow regulating means or to the flow regulating means itself, such that the motion provided at the input (actuator) end of the mechanism is different in direction or distance traveled than the motion at the output (valve) end of the mechanism.

Image 1 for class 137 subclass 601.15

Figure 1: A typical example of the subject matter. RESERVEVALVE FOR FUEL TANK: A - Cylindrical casting; B - Screw threadsmatches internal threads of "C"; C - Supply tank; D - Central passage;E - Port; F - Tapered valve to close port "E"; G - Leaf spring;H - Leaf spring free end engaged to screw threaded rod "J"; J -Screw threaded rod; K - Packing gland; L - Packing screw; M - Packingmaterial; N - Internal screw head of lower flow passage. In operation,port "E" is opened by mechanical actuator (screw threaded rod "J"),thereby allowing the fuel to feed from tank "C" through port "E" toinlet passage "D".

SEE OR SEARCH THIS CLASS, SUBCLASS:

315.35

through 315.4, for a particular mechanical actuator of a valve with repair, tapping, assembly, or disassembly means.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 213 through 280for a mechanical movement actuator.

601.16

.. Rotary valve:

This subclass is indented under subclass 599.01. Subject matter wherein at least one flow path has flow regulating means which turns on or revolves about its axis that passes through the regulating means itself.

Image 1 for class 137 subclass 601.16

Figure 1: A typical example of the subject matter. A - Rotarycontrol valve assembly; B - First body member; C - Second body members;D - Axially movable valve; E - Inlet passage; F - Outlet passage;G - Rotary flow-through valve; H - Cross slot in valve "G" to alignwith "F"; J, K - Rotary valve seal rings; L - Set screw (loosenedwhen valve "G" is rotatably adjusted). In operation, valve "G" isrotatable whereby the position of cross slot "H" relative to "F"is selectively adjusted between valve-closed position and valve-openposition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

887,	for systems having a flow control means for branched passages containing a rotary valve.
901,	for biased rotary ball valves with operators.
905,	for rotary valves for multiple gas burners.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 304 through 317.01for a rotary valve.

601.17

... Butterfly valve:

This subclass is indented under subclass 601.16. Rotary valve wherein the movable flow control member has a disk or semicircular clappers shape that rotate centrally and perpendicularly to open or close the flow passage to regulate the flow of fluid.

Image 1 for class 137 subclass 601.17

Figure 1: A typical example of the subject matter. A - Butterflyvalve; B - Valve housing; C - Flow passage; D - Valve disc; E -Disc support shaft; F - Resilient seal; G - Flange (to secure pipesections); H - Distribution ring; J - Jet orifices; K - Upstreamradial port; L - Downstream radial port; M - Fluid conduit; N -Valve to control fluid movement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

15.25,	for a process of assembling, disassembling, or repairing a butterfly valve.
315.22	through 315.24, for a butterfly valve with repair, assembly, or tapping means.

SEE OR SEARCH CLASS:

49,	Movable or Removable Closures, subclasses 74.1 through 92.1for a louver-type closure (e.g., slats, panels, etc.).
123,	Internal-Combustion Engines, subclass 337 for a specific throttle valve structure.
220,	Receptacles, subclasses 810 through 849for a closure mounted for swinging (e.g., hinged, etc.).
251,	Valves and Valve Actuation, subclasses 305 through 308for a butterfly valve.
454,	Ventilation, subclasses 333 through 336for an adjustable damper type valve.

601.18

.. Having guide or restrictor:

This subclass is indented under subclass 599.01. Subject matter wherein at least one flow path has means to change flow direction or impede it without having the intention of blocking it completely during normal use.

Image 1 for class 137 subclass 601.18

Figure 1: A typical example of the subject matter. A - Controlvalve; C - Inlet (discharge from boiler); D - Steam trap; E, F -Branch pipes; G, H - Contracted or constricted passages. Note: Toinsure the perfect operation of the steam trap, the passages "G"and "H" in the branch pipes "E" and "F" are contracted or constrictedto such an extent in their diameter as to prevent the escape ofsteam with the water.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclass 117 for a restrictor in parallel to a main valve or subclasses 118-127 for a material guide or restrictor.

601.19

... Manually variable:

This subclass is indented under subclass 601.18. Subject matter wherein the guide or restrictor can be adjusted by a human being.

Image 1 for class 137 subclass 601.19

Figure 1: A typical example of the subject matter. A - Couplingdevice; B - Inlet; C - Outlet; D - Body of the device; E - Annularclosing head; F - Removable adapter plate; G - Tubular insert; H- Dovel pins; J, K, L, M - Manually adjustable restrictor assembly;N - Restrictor valve; P - Inlet chamber; Q - Outlet chamber. Inoperation, fluid flowing into the device "A" by way of the inletpipe "B" is trapped in the chamber "P" and its passage into theoutlet chamber "Q" is regulated by the restrictor "N".

SEE OR SEARCH CLASS:

251,	Valves and valve actuation, subclasses 121 through 122for a movable or resilient adjustable guide or restrictor.

601.2

.. Having direct response valve (e.g., check valve, etc.):

This subclass is indented under subclass 599.01. Subject matter wherein at least one flow path has a flow regulating means comprising a device which automatically limits the fluid flow to a single direction and is sensitive to the pressure of the fluid.

Image 1 for class 137 subclass 601.2

Figure 1: A typical example of the subject matter. A - Directresponse valve; B - Valve housing; C - Orifice member; D - Flatupstream face of "C"; E - Orifice regulating spring; F - Apex coil;G - Base coil; H - Inlet port; J - Outlet port; K - Plurality ofequally spaced orifices. In operation, to maintain uniform flowthrough valve "A", orifices "K" are closed and opened with increases anddecreases in the pressure differential between "H" and "J". Thiscontrol is provided by closure of "F" against upstream face "D"of the plate "C" with changes in the pressure differential.

SEE OR SEARCH THIS CLASS, SUBCLASS:

526,	for a line condition direct response vacuum relief type valve (i.e., check valve).

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 336 through 338for a biased valve.

601.21

... With reverse flow direction:

This subclass is indented under subclass 601.2. Subject matter wherein the direct response valve is provided with means causing the stream of fluid to turn completely in opposite path.

(1) Note. The term "reversible" refers, in this case, to a valve whose function of permitting the fluid to pass through it at a governed velocity in but one direction can be reversed in either direction at the will of the operator, without dismemberment of the valve.

Image 1 for class 137 subclass 601.21

Figure 1: A typical example of the subject matter. A -Valve body; B - Body cover; C, C" - opposed valve seats;D, D" -Oscillating cross shafts; E, E" - Valves;G, G" - Levers; H - Adjusting rod flexibly joined to G,G"; I, I" - Adjustable collars; J, J" -Setcollars connecting G, G"; K - Spring connecting set collars;L - Bypass controlled by valve "M"; M - Auxiliary valve.

SEE OR SEARCH CLASS:

137,	Fluid Handling, subclasses 15.08 through 15.17for a process of securing, replacing, or servicing a pipe, joint, valve, or tank, or subclasses 315.01-329.4 for a fluid handling system with repair, tapping, assembly, or disassembly means.

602	. Multiple inlet with single outlet:

This subclass is indented under subclass 561. Systems including a fluent material branched flow line having two or more inlets or admission passages connected to a single outlet or exhaust passage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

88+,	and 111+, for systems which include a self proportioning or correlating feature and have plural inlets and a single outlet.
155,	for gas lift devices for liquid columns which include a gas injecting means.
247.27,	for liquid seal devices with plural inlets.
263,	and 266+, for plural tanks having a common outflow path.
564.5,	for a follower type feeder responsive to main line flow.
597,	for multiple inlet systems with multiple outlets.
625.4+,	for valve units performing this function.

SEE OR SEARCH CLASS:

48,	Gas: Heating and Illuminating, subclasses 180+ for a device mixing gases, the mixed product being a heating or illuminating gas.
222,	Dispensing, subclasses 145.1+ for dispensers comprising plural sources having a common discharge.
239,	Fluid Sprinkling, Spraying, and Diffusing, appropriate subclasses under 303, 310, 340, 398, and 486 for spray devices having plural fluid inlets, where the mixing is effected prior to discharge through a single outlet nozzle passage.
261,	Gas and Liquid Contact Apparatus, appropriate subclass for apparatus specially adapted to produce an intimate contact between gases and liquids to exchange properties or mutually modify conditions.
431,	Combustion, subclasses 159+ for a furnace comprising a combustion chamber element with structure feeding fuel and air to form a shaped, distributed or directed flame within the chamber, and subclass 354 for a fuel and air mixer with an immediately associate unshaped flame holding fuel discharge structure.

603	.. Faucet attachment:

This subclass is indented under subclass 602. Systems comprising means at each inlet for attachment to a faucet, whereby the efflux from the respective faucets, usually hot and cold water, may be mixed prior to discharge from the single outlet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

337,	for hot and cold water systems having a connection from the hot to the cold channel, usually for antifreeze purposes.
342,	for mixing valves with soap dish, etc., supports.
562,	for systems comprising a receiving means, usually a dish washer or clothes washer, to be filled from a sink faucet arrangement and emptied into the sink.
599.03	through 599.04, for systems having inlets where one or more flow lines divide into parallel flow lines then recombine.

888	.. Combining by aspiration:

This subclass is indented under subclass 602. System in which a fluid flowing from a first inlet flow line causes or facilitates the flow of a fluid from a second inlet flow line so that the fluids are combined prior to leaving the single outlet or exhaust passage, the fluid flowing from the first inlet flow line serves as the motivating or aspirating fluid while the fluid in the second inlet flow line serves as the aspirated fluid; whereby, the motivating or aspirating fluid imparts energy to the aspirated fluid by the action of entrainment.

(1) Note. In regard to the classification of an aspirator between Class 417, Pumps, and this class (137), subclasses 888+, and aspirator in which the disclosed function is to mix or combine together two or more fluids is classified in Class 137, whereas an aspirator in which the sole disclosed function is to pump one fluid by means of entrainment with another is classified in Class 417. In the case of dual disclosed functions, if an aspirator has a disclosed function of pumping one fluid by entraining it with another and a disclosed function of mixing or combining together two or more fluids to produce a mixture, the classification is in Class 137.

SEE OR SEARCH THIS CLASS, SUBCLASS:

101.11,	205.5, and 564.5, for mixing or combining of fluids in which one fluid is added to another by means of differential pressure existing along a main line which has a shunt line leading to a reservoir containing a fluid to be added to the main line downstream of the shunt line; many of these devices may include an aspirating effect.
268,	for devices including a holder for solid, flaky, or pulverized material to be dissolved or entrained.
896+,	for mixing or combining of plural fluids by means other than aspiration.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 129+ for dispensers comprising plural sources which may also have a common discharge, and particularly indented subclasses 145.1+ for dispensers comprising plural sources having a common discharge.
239,	Fluid Sprinkling, Spraying, and Diffusing, subclasses 310+ , 335+, 337+, and 398+ for spraying devices having additional means to promote mixing of a plurality of different streams.
261,	Gas and Liquid Contact Apparatus, appropriate subclasses for apparatus for mixing a liquid with a gas.
366,	Agitating, appropriate subclasses for devices adapted to promote mixing of plural fluent materials by means other than aspiration.
417,	Pumps, appropriate subclasses for aspirators having a sole disclosed function of pumping of one fluid by entrainment with another, and see Note (1) above.

889	... Combining of three or more diverse fluids:

This subclass is indented under subclass 888. System wherein the branched flow line has three or more inlets or admission passages connected to the single outlet or exhaust passage; and wherein the system includes three or more fluids, each fluid having a characteristic which is diverse from or different from the characteristic of at least two other of the fluids such as different composition, different phase (i.e., gas and liquid), different temperature, or different viscosity.

(1) Note. All of the three or more diverse fluids do not necessarily need to be flowing simultaneously; the system may include means to selectively control one or more of the flow paths.

890	... Plural motivating fluid jets:

This subclass is indented under subclass 888. System in which the fluid flowing from the motivating fluid inlet line is divided into a plurality of streams prior to combining with the aspirated fluid; or in which the motivating fluid acts to entrain the aspirated fluid and then, the motivating fluid again, or the combined motivating and aspirated fluid stream acts to further entrain additional fluid to be aspirated at a point downstream of the first entrainment.

891	... Flow control by varying position of a fluid inlet relative to entrainment chamber:

	This subclass is indented under subclass 888. System wherein at least one of the inlets or admission passages is movable relative to the portion of the system in which the fluids are entrained and combined so that, by altering the position of the movable inlet relative to the entraining portion of the system, the flow of one or more of the incoming fluids may be controlled.

892	... With selectively operated flow control means in inlet:

This subclass is indented under subclass 888. System including means located in an inlet flow line or in an admission passage to selectively control the flow of fluid flowing from the inlet flow line into the portion of the system in which the fluids are entrained and combined.

(1) Note. The means for selectively controlling flow in an inlet flow line or admission passage may comprise control means for venting the inlet flow line or admission passage, as, for example, for allowing a portion of the motivating fluid located upstream of the admission passage to escape from the motivating fluid inlet line or for allowing air to be admitted into the aspirated fluid inlet line.

893	.... Flow control means is located in aspirated fluid inlet:

	This subclass is indented under subclass 892. System wherein the means to selectively control the flow of fluid is located in the aspirated fluid inlet flow line or in the aspirated fluid admission passage so as to control the flow of aspirated fluid from the aspirated fluid admission passage into the entraining and combining portion of the system.

894	..... Single actuator operates flow control means located in both motivating fluid and aspirated fluid inlets:

This subclass is indented under subclass 893. System wherein additional means to selectively control the flow of fluid is located in the motivating fluid inlet flow line or admission passage so as to control the flow of motivating fluid from the motivating fluid admission passage into the entraining and combining portion of the system; and wherein a single, selectively controlled actuator is operatively connected to both the flow control means located in the aspirated fluid inlet flow line or passage and to the flow control means located in the motivating fluid inlet flow line or passage, so that whenever the actuator is selectively operated, the flow control means located in both the aspirated and motivating fluid inlet flow lines or admission passages are operated to alter the flows of the respective fluids into the entraining and combining portion of the system.

895	... With condition responsive valve:

	This subclass is indented under subclass 888. System including a movable valve connected to a flow line, which valve is operated to move in response to a change in the condition of the fluid located within the system.

896	.. With means to promote mixing or combining of plural fluids:

This subclass is indented under subclass 602. System including means to promote admixing or combining together of the fluids leaving the admission passages prior to discharge from the single outlet so as to provide a single, combined, or uniformly mixed output stream.

(1) Note. Mere plural inlets to a combining chamber is insufficient for causing classification in this subclass. The means to promote combining of plural fluids must include structure for bringing the fluids into contact in a particular manner such as baffles or other means to cause turbulence, flow-shaping or fluid-guiding means to cause the fluids to be combined in a particular manner, etc.

(2) Note. In regard to the classification of a system having two or more inlets connected to a single outlet, which system including means to promote "mixing" of two or more fluids, classification in Class 366, Agitating, is proper if the plural fluids to be mixed are liquids and the means to promote mixing of the liquids is something other than an aspirator. A mixing system is properly classified in this class (137), either (a) in subclasses 888+ if the fluids (including liquids) are mixed by aspiration, or (b) in these subclasses 896+ if the fluids to be mixed are other than two or more liquids. A system including means to promote "combining" of two or more fluids, as opposed to means to promote "mixing" of two or more fluids, is classifiable in this class (137), subclasses 888+ or 896+ even if the fluids are liquids since Class 366 requires a means to promote "mixing" of the fluids.

SEE OR SEARCH THIS CLASS, SUBCLASS:

603,	for faucet attachments wherein water from hot and cold water faucets is mixed or combined to provide a single output stream of intermediate temperature.
605+,	for mixing faucets for hot and cold water which do not claim additional means to promote mixing.
888+,	for mixing or combining of plural fluids by aspiration means wherein a fluid is mixed or combined with another by the action of entrainment, and see the search notes under subclass 888.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 129+ for dispensers comprising plural sources which may also have a common discharge, and particularly indented subclasses 145.1+ for dispensers comprising plural sources having a common discharge.
239,	Fluid Sprinkling, Spraying, and Diffusing, subclasses 310+ , 335+, 337+, and 398+ for spraying devices having additional means to promote mixing of a plurality of different streams.
261,	Gas and Liquid Contact Apparatus, appropriate subclasses for apparatus for mixing a liquid with a gas.
366,	Agitating, appropriate subclasses for devices adapted to promote mixing of plural fluent materials by means other than aspiration, and see note (2) above.

897	... With selectively operated flow control means:

	This subclass is indented under subclass 896. System including means located in a flow line, admission passage, or the outlet passage to selectively control the flow of the fluid in one or more of the flow lines.

898	.... Single actuator operates plural flow control means:

This subclass is indented under subclass 897. System wherein there are a plurality of means to selectively control the flow of fluid within the system, which means to control the flow of fluid is located in any combination of two or more locations including the flow lines, admission passages, or the outlet passage; and wherein a single, selectively controlled actuator is operatively connected to the plural flow control means, so that whenever the actuator is selectively operated, the plural flow control means are operated to alter the flows of the fluids within the system.

605	.. With flow control:

This subclass is indented under subclass 602. Systems having means to stop or to regulate the flow of fluent material in one or more branches.

SEE OR SEARCH THIS CLASS, SUBCLASS:

631+,

for valves of the cyclical type and see the search notes to subclass 631.

606	... Valve in each inlet:

This subclass is indented under subclass 605. Systems in which the flow control means comprises one or more valves in each inlet branch.

(1) Note. Mixing faucets for hot and cold water, which do not claim additional means to promote mixing, are classified herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

603,	for valve devices of the plural inflow-single outflow type attachable to conventional hot and cold water faucets, i.e., mixing attachments for faucets.
888+,	for valve devices comprising means for promoting mixing of the plural inflows. See (1) Note.
896+,	for valve devices comprising means for promoting mixing of the plural inflows.

607	.... With common valve operator:

This subclass is indented under subclass 606. Systems in which at least one valve in each inlet branch is connected to a single operating means so as to be operated thereby.

SEE OR SEARCH THIS CLASS, SUBCLASS:

631+,	for cyclical valves and actuators, and see the search notes thereto.
862+,	for distribution systems plural branches and plural valves having a single actuator, and see the search notes thereto.

861	. With flow control means for branched passages:

This subclass is indented under subclass 561. System wherein an array of branched fluent material flow passages is provided with means to stop or regulate the flow in more than one branch, which means may comprise (1) multiple valves, (2) a deflector or valve located at a junction and operable to open one passage and close or restrict the flow from the other, or (3) a single valve controlling one outlet flow path, the hydrostatic characteristics of the system being such that the entire flow passes through the valved line when it is fully open.

(1) Note. See the class definition, Lines With Other Classes (2) Plural Valves, and Subclass References to the Current Class 4 for search notes of plural valves and their actuators.

SEE OR SEARCH THIS CLASS, SUBCLASS:

255+,	for plural tanks or compartments having parallel outflows.
280,	and 299, for hydrants having plural risers and/or outlets.
594+,	for distribution systems comprising two or more noncommunicating flow paths.
602+,	for distribution systems having plural inflows and a single outflow.
625+,	for valves and valve actuation involving multiway valve units in which there is a pattern or special flow relation, and see the search notes thereto.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 482+ for dispensers having plural openings or discharge guides with discharge control means for plural outlets.

862	.. With common valve operator:

This subclass is indented under subclass 861. Systems wherein a plurality of branches in the branched array are each provided with a separate flow control means and means to coordinate the actuation of the separate flow control means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

595,	for systems having plurally noncommunicating flow paths with a common valve operator.
601.01	through 601.12, for systems dividing into parallel flow lines then recombining including valves having a common operator therefor.
607,	for systems having a multiple inlet having a flow control valve in each inlet having a common valve operator.
631+,	for valves of the cyclical type, and see the search notes thereto.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 485+ for interconnected or integral flow controllers for plural dispenser outlets, and subclasses 488+ for controllers for a single passage into which plural passages merge.

863	... For valve having a flexible diaphragm valving member:

	This subclass is indented under subclass 862. Systems in which at least one flow control means comprises a pliant member which flexes relative to a rigid surface to control flow therebetween.

864	... For valve having a ball head:

	This subclass is indented under subclass 862. Systems comprising at least one flow control means which employs a substantially spherical member to regulate flow.

865	... With gearing:

	This subclass is indented under subclass 862. Systems wherein the means to coordinate the actuation of the flow control means includes relatively movable toothed members which transmit motion to the flow control means by meshing of the teeth during travel of the members.

866	... Threaded actuator:

This subclass is indented under subclass 862. Systems wherein the means to coordinate the actuation of the flow control means includes a member having a helical rib, which member reciprocates as a result of rotary motion applied thereto.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 248+ for gear-actuated valves, per se.

867	... Pivoted or rotary motion converted to reciprocating valve head motion:

	This subclass is indented under subclass 862. System comprising a flow control means in which swinging or turning motion of a member is mechanically converted to rectilinear movement of a flow control member.

868	.... Spring biased:

	This subclass is indented under subclass 867. System wherein a resilient mass is provided to urge either the flow control means or coordinating means to a desired position.

869	... Having fluid actuator:

	This subclass is indented under subclass 862. System wherein the coordinating means includes a hydraulic or pneumatic motor.

870	... With electrical actuation:

This subclass is indented under subclass 862. System wherein the coordinating means includes means utilizing electrical energy to effect actuation of a flow control means.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 129+ for electrically actuated valves, per se.

871	... Spring biased:

	This subclass is indented under subclass 862. System wherein a resilient mass is provided to urge either the flow control means or coordinating means to a desired position.

872	.. With valve or movable deflector at junction:

This subclass is indented under subclass 861. System wherein a fluent material flow regulating means or fluent material diverting means is provided at the junction of the inlet branch with two or more outlet branches, the fluent material flow regulating means or movable diverting means being selectively operable to direct the effluent from the inlet branch into an desired outlet branch or branches.

(1) Note. The deflector, when discharging directly to the ambient space or atmosphere, is also considered an outlet passage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

119.01+,

for downspouts having automatic means to shift the flow between branches, especially subclass 120 for valves or deflectors at the junction of a rain downspout in which the valve or deflector is shifted in response to the collection of a predetermined quantity of rainfall in an auxiliary timing tank.

SEE OR SEARCH CLASS:

193,	Conveyors, Chutes, Skids, Guides, and Ways, subclasses 13 , 14, 23, 28, 29, and 31 for switches and multiple point discharge for chutes.
406,	Conveyors: Fluid Current, subclasses 117+ for a conveyor having plural intakes; subclasses 155+ for a conveyor having plural outlets; and subclasses 181+ for a flow diverter, divider, or combiner, per se.

873	... Movable deflector spout in lateral port:

This subclass is indented under subclass 872. System in which an opening in the side wall of the fluent material flow line provides a branched discharge line, there being provided a pipe which may be moved into position in the flow line to deflect the fluent material through the opening in the side wall, the pipe being effective to guide or to conduct the diverted fluent material to a point beyond the opening.

874	... Valve or deflector is tubular passageway:

	This subclass is indented under subclass 872. System in which the fluent material flow control means or diverting means comprises, at least in part, a movable tubular switching passageway.

875	... Pivoted valve or deflector:

	This subclass is indented under subclass 872. System in which fluent material flow control or diverting means swings about an axis other than its axis of symmetry.

876	... Rotary valve or deflector:

	This subclass is indented under subclass 872. System in which at least one fluent material flow control or diverting means only rotates about its axis of symmetry.

877	.. Biased valve:

	This subclass is indented under subclass 861. System in which at least one of the flow passages is provided with a fluent material flow control means which is urged by a spring, gravity, or fluid pressure means either toward or away from its seat.

878	... Spring bias:

	This subclass is indented under subclass 877. System wherein a resilient mass is provided to urge the flow control means to a desired position.

879	.... For valve having a ball head:

	This subclass is indented under subclass 878. System wherein fluent material flow control means employs a substantially spherical member to regulate flow.

880	.... With threaded actuator:

	This subclass is indented under subclass 878. System wherein the means to actuate the fluent material flow control means has a helical rib by which the actuating means reciprocates as a result of rotary motion applied thereto.

881	.... Spring coaxial with valve:

	This subclass is indented under subclass 878. System wherein the axis along which the resilient mass is compressed is coincident with the axis along which the fluent material flow control means moves.

882	..... Biased open:

	This subclass is indented under subclass 881. System wherein the resilient means is provided to urge the flow control means to an open position.

883	.. Single inlet with multiple distinctly valved outlets:

This subclass is indented under subclass 861. System having two or more outlets or exhaust passageways connected to a single inlet or admission passage, there being a separate, distinct, and independently operable material flow regulating means in each outlet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

602+,

for system with plural inflow and a single outflow.

884	.. Sectional block structure:

This subclass is indented under subclass 861. System wherein the flow passages are formed in modular pieces facilitating assembly or disassembly of the array.

SEE OR SEARCH THIS CLASS, SUBCLASS:

269+,

for valves convertible by reassembling or by adding or omitting a part.

885	.. With fluid actuator:

This subclass is indented under subclass 861. System in which a fluent material flow regulating means is actuated, at least in part, by a fluid pressure motive means.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 12+ for fluid-actuated valves, per se.

886	.. With threaded actuator:

This subclass is indented under subclass 861. System comprising a fluent material flow regulating means having an operator with a helical rib, which operator reciprocates as a result of rotary motion applied thereto.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 213+ for valves with threaded actuators, per se.

887	.. Containing rotary valve:

This subclass is indented under subclass 861. System in which a fluent material flow control means rotates about its axis of symmetry.

SEE OR SEARCH THIS CLASS, SUBCLASS:

601.16

through 601.17, for systems dividing into parallel flow lines then recombining having a rotary valve.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclasses 304+ for rotary valves, per se.

613	. Flow path with serial valves and/or closures:

This subclass is indented under subclass 561. Systems comprising a single flow path for a fluent material having two or more spaced valves, flow controllers or closures therein through which the fluent material passes serially.

(1) Note. A tank with claimed inlet and outlet, each with valve or closure, is here.

(2) Note. See the class definition, Lines With Other Classes and Within this Class, (2) Plural Valves, and Subclass References to the Current Class, for search notes on plural valves and their actuators.

SEE OR SEARCH THIS CLASS, SUBCLASS:

232,	for tire stems with inflation check valve and cap.
247.17,	for plural serial valves combined with liquid seal apparatus.
269,	for serially arranged valves, flow controllers, or closures, wherein one of these is a removable closure which is entirely separated from the remaining structure in order that a flow section may be attached in place thereof.
285,	299 and 300, for hydrants including a main valve and a serially arranged supplemental valve.
391,	for liquid level control of both inflow and outflow of a tank.
583+,	for systems with plural openings, one of which is an access opening or a gas vent.
596+,	for drain and stop and waste valves, and see the search notes thereto.
599.06	through 599.07, for systems where flow is divided into parallel flow lines then recombined having a digital flow controller for separately actuated valves and their flow lines.
599.08,	for systems where flow is divided into parallel flow lines then recombined having a multi way serial valve at dividing or recombining of the flow lines.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 445+ and 450+ for measuring traps with valved inlets and outlets and subclasses 478+ for dispensing containers with plural openings.
251,	Valves and Valve Actuation, subclass 118 for a valve in series with a restrictor.

614	.. Separable flow path section, valve or closure in each:

This subclass is indented under subclass 613. Systems in which the flow path includes joined, disconnectible, sections; one of the valves, flow controllers or closures being retained with each section.

SEE OR SEARCH THIS CLASS, SUBCLASS:

572,	for series connected tanks with valved separable connections, and see the search notes thereto.
637.05,	for serial valves with actuators correlated across a separable joint in the flow path.

614.01

... Common joint and valve seat faces, or sections joined by closing members:

	This subclass is indented under subclass 614. Systems in which (1) the faces which seat the valves, flow controllers, or closures, when the sections are disjoined, abut each other when the sections are joined, (2) the valves, flow controllers, or closures, have integral with them that structure which joins the flow path sections.

614.02

... Each valve and/or closure operated by coupling motion:

This subclass is indented under subclass 614. Systems in which actuation of each of the valves, flow controllers, or closures is simultaneous with the joining or disconnecting of the flow path sections.

SEE OR SEARCH THIS CLASS, SUBCLASS:

223+,

for systems including coupling operated serial valves in which one of the valves is an inflation stem for a pneumatic tire or other inflatable article.

SEE OR SEARCH CLASS:

141,	Fluent Material Handling, With Receiver or Receiver Coacting Means, subclasses 348+ for supply means carried receiver flow control opening means wherein receiver actuated supply discharge means may also be included.
244,	Aeronautics and Astronautics, subclass 135 for arrangements for storing and feeding fuel on aircraft, or for supplying fuel to or removing fuel from aircraft.

614.03

.... Linear motion of flow path sections operates both:

	This subclass is indented under subclass 614.02. Systems in which the joining or disconnecting includes a linear component of motion of the flow path sections with respect to each other, which linear component results in the operation of both valves, flow controllers or closures.

614.04

..... Valves actuate each other:

	This subclass is indented under subclass 614.03. Systems in which the force which moves the valves, flow controllers, or closures is transmitted from one to the other and vice versa.

614.05

... Valve- or closure-operated by coupling motion:

This subclass is indented under subclass 614. Systems in which actuation of one of the valves, flow controllers or closures is simultaneous with the joining or disconnecting of the flow path sections.

SEE OR SEARCH CLASS:

251,

Valves and Valve Actuation, subclass 89.5 for a valve related to separable flow path sections wherein blocking of the valve actuator is related to the joint between the sections, and subclass 149.9 for a valve related to separable flow path sections wherein blocking of the coupling operation is related to the valve or its actuator.

614.06

... Coupling interlocked with valve, or closure or actuator:

This subclass is indented under subclass 614. Systems in which the act of joining the flow path sections and the act of operating one of the valves, flow controllers, or closures must be performed in a predetermined sequence.

SEE OR SEARCH CLASS:

141,	Fluent Material Handling, With Receiver or Receiver Coacting Means, subclasses 335 , 336, 348+, and 351+ for a valved joint between a portable supply and a receiver, the valve being operated by the act of connecting or disconnecting them.
251,	Valves and Valve Actuation, subclasses 89.5 and 149+ for a valve operated by coupling motion of flow path sections, subclass 89.5 also including features of the coupling which may block or disable the valve actuator.

614.11

.. Common actuator:

	This subclass is indented under subclass 613. Systems in which the several valves are operated by a single actuator.

614.12

... Delivery cock with terminal valve:

	This subclass is indented under subclass 614.11. Systems comprising a faucet-type cock having a closure which coacts with either the inlet or outlet end of the cock and is connected with the main cock valve for simultaneous actuation therewith.

614.13

... Alternately seating:

This subclass is indented under subclass 614.11. Systems wherein as one valve is moved toward its closed position, another valve is simultaneously moved toward its open position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

329.1,

and 329.2+, for valves having a supplementary valve which is normally held open but closes upon disassembly of the main valve to prevent loss of fluid during repair of the main valve.

614.14

.... Biased valve:

	This subclass is indented under subclass 614.13. Systems in which at least one valve is biased by spring means, gravity or fluid pressure.

614.15

... Opposed screw:

	This subclass is indented under subclass 614.11. Systems in which the valve heads are simultaneously moved toward or away from oppositely directed seats by a common actuator through a right and left hand screw relationship.

614.16

.. One valve head provides seat for other head:

This subclass is indented under subclass 613. Systems in which the movable element of one valve forms the seat for the movable element of another valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

637.5,

for concentric rotary plug type valves having co-axial stems, the inner valve being removable without disturbing the outer valve.

614.17

... Also carries head of other valve:

	This subclass is indented under subclass 614.16. Systems in which a valve comprising a head and seat is carried by and movable with the head of another valve.

614.18

.. One valve head carries other valve head:

	This subclass is indented under subclass 613. Systems in which the head portion of one valve is carried by and movable with the head of another valve.

614.19

.. Biased valve with external operator:

	This subclass is indented under subclass 613. Systems in which at least one of the valves is biased by spring means, gravity or fluid pressure and which is also provided with an operator therefor which is manually actuatable from outside the system.

614.2

.. Direct response normally closed valve limits direction of flow:

	This subclass is indented under subclass 613. Systems in which at least one of the valves is of the check valve type, thereby preventing flow in one direction.

614.21

.. Coaxial oppositely directed seats:

	This subclass is indented under subclass 613. Systems in which two valve seats are provided in coaxial relationship, each seat having a separately actuatable head associated therewith.

615	. Articulated or swinging flow conduit:

This subclass is indented under subclass 561. Systems comprising a spout, nozzle or similar fluid flow conduit having two or more sections joined for relative angular movement in one or more planes whereby the device may be swung or otherwise caused to assume various delivery or nonuse positions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

274,	for water cranes having a valve operated by the spout.
276,	for water cranes having a spout articulated to a rotating riser.
279,	for water cranes having a spout articulated to nonrotating risers.
438,	for movable inlet terminals in float arm operated valve control of liquid level.
577+,	for tanks combined with a movable outlet pipe or spout when level or quantity discharged is regulated thereby, especially subclass 579 for swinging spouts or pipes, and see the search notes to subclass 577.
801+,	for fixed or flexible nozzles or spouts.

SEE OR SEARCH CLASS:

193,	Conveyors, Chutes, Skids, Guides, and Ways, appropriate subclasses, especially subclasses 16 , 17+, 22, and 23 for swinging conveyor chutes.
222,	Dispensing, subclasses 526+ for dispensers having movable material discharge guides, especially subclasses 533+ for swingable discharge guides.
406,	Conveyors: Fluid Current, subclasses 113+ and 114+ for a fluid current conveyor having a movable inlet or movable outlet, respectively.

616	.. Actuates valve:

This subclass is indented under subclass 615. Systems in which relative movement of the sections of the flow conduit actuates a valve which controls flow through the conduit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

274,	for water cranes having a valve operated by the spout.
286+,	for hydrants having a valve actuated by movement of the riser.

SEE OR SEARCH CLASS:

15,	Brushing, Scrubbing, and General Cleaning, subclass 318 for air blast cleaners in which the air supply control is interlocked with nozzle motion means.
222,	Dispensing, subclasses 519+ , 522+ and 526+, especially subclasses 528, 529, 531+, 536, and 537 for dispensers having movable material discharge guides associated with closures.
251,	Valves and Valve Actuation, subclass 149 for single flow path devices having a single valve contained in a pipe coupling or union in which the valve is operated by motion of the coupling or conduit, and subclasses 341+ and 349+ for valves having a casing, inlet or outlet which is also an actuator for the valve.

616.3

... Plural motions of valve:

This subclass is indented under subclass 616. Devices wherein the movement of the flow conduit produces plural motions of the valve or valve components.

SEE OR SEARCH THIS CLASS, SUBCLASS:

315.36,

for a particular mechanical actuator providing plural motions of a valve flow control member with repair, tapping, assembly, or disassembly means.

616.5

... Reciprocating valve:

	This subclass is indented under subclass 616. Devices wherein the movement of the flow conduit produces reciprocating motion of the valve or valve components.

616.7

... Rotary valve:

	This subclass is indented under subclass 616. Devices wherein the movement of the flow conduit produces rotary motion of the valve or valve components.

This subclass is indented under the class definition. Subject matter wherein the device includes an element designed to rupture or break where a force of a magnitude greater than a predetermined value is applied thereto.

SEE OR SEARCH THIS CLASS, SUBCLASS:

68.11+,

for devices in which some operation to control the system is caused by failure of the frangible part.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 541.1+ for dispensers with frangible outlet elements.

798	WITH COUPLING:

This subclass is indented under the class definition. Subject matter wherein the device includes a connecting means to join two or more flow lines in fluid conducting relation.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclass 148 for couplings combined with valves and see the search notes to subclass 148.
285,	Pipe Joints or Couplings, for pipe couplings, per se.

This subclass is indented under subclass 798. Subject matter wherein the coupling is capable of flexing, bending or bowing.

(1) Note. This subclass includes articulated and swivelly mounted couplings.

SEE OR SEARCH THIS CLASS, SUBCLASS:

615+,

for articulated or swiveled conduits in distribution systems, and see the search notes to subclass 615.

SEE OR SEARCH CLASS:

251,	Valves and Valve Actuation, subclass 150 for valve devices associated with a flexible or expansible coupling.

800	WITH CLOSURE:

This subclass is indented under the class definition. Subject matter wherein the device is provided with removable cap or similar closing means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

232+,	for tire valve stems with cap.
296,	and 371, for covers for hydrants and valve and meter wells.
377+,	for guards and shields associated with distribution systems, especially subclass 382 for valve guards which prevent access to the valve but do not cut off fluid flow.
583+,	for closures for access openings for distribution systems.
613+,	for single flow path devices with serial valves and/or closures.

SEE OR SEARCH CLASS:

138,	Pipes and Tubular Conduits, subclasses 89+ for closures and plugs for pipes.
220,	Receptacles, subclasses 200+ for receptacle closures and see the notes collected in the definition of subclass 200 for a complete search on closures.
222,	Dispensing, subclasses 544+ , especially subclasses 546, 551, 552, and 554 for flow controllers or closures for dispenser openings.

801	FAUCETS AND SPOUTS:

This subclass is indented under the class definition. Subject matter wherein the device is provided with a fluid inlet or outlet in the form of a nozzle or spout which discharges the effluent in a desired direction or with a desired pattern or admits and directs it into a receiver of which it forms a part.

SEE OR SEARCH THIS CLASS, SUBCLASS:

615+,	for articulated or swiveled nozzles or spouts, and see the search notes thereto for movable devices of this type.
800,	for nozzles or spouts provided with a removable closure member.
861+,	for deflector type spouts forming a branch outlet.

SEE OR SEARCH CLASS:

222,	Dispensing, subclasses 519+ , 522+, 526+, and 565+ for dispensing nozzles and spouts, and see section 19, of the class definition of Class 222 and search notes therein.
239,	Fluid Sprinkling, Spraying, and Diffusing, appropriate subclasses for specific nozzle structures for sprinkling or spraying fluids.
251,	Valves and Valve Actuation, subclasses 153+ for valves combined with inlet or outlet structure comprising a single flow path, especially 155 for valves associated with nozzles or spouts, subclass 340 for a valve actuator surrounding a nozzle, and subclass 349 for inlet or outlet element which serves as a valve actuator.