This is the residual class for apparatus for, and corresponding methods of operating on fluid, viscous, plastic, or fluent particulate material solely for causing portions of the material to move irregularly with respect to each other so as to intermix. The material may be in motion or at rest immediately before agitation.
Apparatus for agitating articles which are treated in the same manner as fluent particulate material will also be included in this class, unless classified elsewhere.
This class (366) includes apparatus for forming colloid systems (such as suspensions, emulsions) by agitation, not elsewhere provided for. See LINES WITH OTHER CLASSES AND WITHIN THIS CLASS, below, for related information.
This class (366) also includes stirrers, per se, which are disclosed for use as agitators. However, see Lines With Other Classes, below, for impellers.
{Note: Patents issued prior to 1945 have not in all instances been classified by their claimed disclosure so that placement of these older patents does not necessarily indicate lines of classification.}

LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
See appropriate composition classes for processes which form colloid systems (such as emulsifying or foaming), and see Class 516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, for processes of making, stabilizing, breaking, or inhibiting colloid systems when such is generically claimed (no claimed art use for the composition) or when there is no hierarchically superior provision in the USPC for the specifically claimed art to the composition of the colloid system.
See Class 241, Solid Material Comminution or Disintegration, for the generically claimed subject matter of comminuting solid material in a fluid to form or improve a non-colloid suspension. Processes of forming non-colloid suspensions or dispersions of solids in fluids, and in which the ingredients of the non-colloid suspensions or dispersion are not claimed with such particularity as to form a basis for classification in Class 252, the that are an integral part therein, or some other appropriate composition class, are classified in Class 241. In general, Class 241 provides for all apparatus for forming suspensions of solids in fluids by comminution, whether such suspensions are disclosed as colloid-sized or not.
See Class 138, Pipes and Tubular Conduits, subclasses 40+ for conduit provided with a flow restrictor disclosed for use in forming emulsions of a plurality of fluids. Where such apparatus has additional combined features, such as means to
feed material to the restrictor, etc., the patents have been placed in this Class 366.
See Class 127, Sugar, Starch, and Carbohydrates, subclass 14, for mixing devices for a sugar-bearing solution with other liquids or solids for promoting the separation of impurities from the solution.
See Class 366, Agitating, subclasses 69+ for apparatus which may be used for working liquid into a gel, subclasses 101+ for apparatus which includes agitation and injection of gas which may be a foam, subclasses 108+ for apparatus wherein the agitation is effected by vibratory device, subclass 176.1+ for apparatus for forming suspensions or emulsions wherein the feed means is in the form of a pump for forcing the material through a narrow restriction for the purpose of mixing the material, particularly for the purpose of emulsifying or homogenizing the material, subclasses 279+ for apparatus with rotatable stirrer which may be used for making lather or foam, cross-reference art collection 604 for mixing apparatus for making foam or lather, cross-reference art collection 605 for mixing apparatus for stirring of paint.
See Class 416, Fluid Reaction Surfaces (i.e., Impellers), appropriate subclasses for an impeller, per se, which may be useful as a stirrer but where the disclosed use is solely as an impeller, or alternatively as an impeller or stirrer.
Since agitation of material is incidental or ancillary to many apparatuses for treating material for various purposes, an agitator in combination with other means for treating material will be found in the class providing for the particular treatment. Similarly, an apparatus for treating or handling material which inherently or incidentally agitates the material will be included in the appropriate class providing for the treating or handling means. Cross references have been placed in this class (366) where the agitating mechanism claimed in combination with other treating means has been deemed to have general utility as an agitator.
Also see References To Other Classes, below, for additional lines between this class (366) and other classes and for references to the following:
Apparatus Including Agitating Incidental to or Combined with Other Primary Areas;
Agitating Apparatus Classified Elsewhere;
Feeding and Discharging Subcombinations;
Agitator Subcombinations Classified Elsewhere.

REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:
8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers, subclass 159 for manipulative processes of agitating textile material immersed in Liquid for purposes of mechanical or chemical treatment other than impregnating or coating (e.g., washing, bleaching, dyeing). (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
23, Chemistry: Physical Processes, 313 for a process of agglomerating particulate nonmetallic elements or inorganic compounds by agitation (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
34, Drying and Gas Vapor Contact With Solids, for a process or apparatus for drying material including an agitating step or means. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
53, Package Making, appropriate subclasses for packaging methods and apparatus including agitation of the material packaged, and see particularly subclass 525 for apparatus for agitating or jarring material in a filled container for compacting the material. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
53, Package Making, subclass 525 for apparatus for agitating or jarring material in a filled container for the purpose of compacting the material. (For Agitating Apparatus Classified Elsewhere)
62, Refrigeration, appropriate subclasses for processed and apparatus for removing heat from material which may include agitation of the material. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
65, Glass Manufacturing, 178 for glass working apparatus combined with means for agitating molten glass. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
68, Textiles: Fluid Treating Apparatus, appropriate subclasses, particularly 131 for apparatus for agitating textile material immersed in liquid for purposes of mechanical or chemical treatment other than impregnating or coating (e.g., washing machine). (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
74, Machine Element or Mechanism, appropriate subclasses for mechanisms which might be useful in transmitting motion to a stirrer or a movable mixing chamber.
99, Food and Beverages: Apparatus, appropriate subclasses for food treating apparatus of that class combined with agitating means; see particularly 452 for apparatus for treating dairy food, and subclasses 518+, 600+ and 623+ for grain hulling
agitating step. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
118, Coating Apparatus, 400 for coating apparatus involving agitation of the base and coating materials. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
126, Stoves and Furnaces, subclasses 155-157 for a grate having agitating means for clearance of ashes or subclass 387.1 for an open-top liquid heating vessel that may include a lid having an agitator or circulator using the heated liquid within the vessel.
134, Cleaning and Liquid Contact With Solids, appropriate subclasses for processes and apparatus for Cleaning or Liquid Contact With Solids including a carrier or holder for the solid, and also including agitation of the material to promote, facilitate, or perfect the cleaning or Liquid Contact. The agitation may be caused by movement of the carrier through the Liquid or by a separate agitator. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
137, Fluid Handling, appropriate subclasses for transfer process and apparatus for fluent material which includes agitation or mixing of the material and see particularly 3 for processes, and subclasses 87+, 599+ and 602+ for apparatus. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
138, Pipes and Tubular Conduits, 40 for a conduit with a flow restrictor or deflector disclosed for use in forming emulsions of a plurality of fluids. Where such a conduit has additional combined features, such as means to feed material to restrictor, etc., the patents have been placed in Class 366, subclasses 176.1 or 336+. (For Agitating Apparatus Classified Elsewhere)
165, Heat Exchange, subclass 109.1 for heat exchange apparatus including agitating means for a fluent heat exchange medium therein.(Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
166, Wells, subclass 177.7 for agitating means in combination with a well or disclosed solely for use in a well. (For Agitating Apparatus Classified Elsewhere)
172, Earth Working, appropriate subclasses for methods and apparatus for agitating earth in situ. (For Agitating Apparatus Classified Elsewhere)
193, Conveyors, Chutes, Skids, Guides, and Ways subclass 2 and 11 for a chute combined with means to agitate the material so as to aid its flow along the chute. (For Feeding And Discharging Subcombinations)
198, Conveyors: Power-Driven, 750 for an oscillating conveyor, and subclasses 752+ for a vibrating endless through conveyor, per se. (For Feeding And Discharging Subcombination)
201, Distillation: Processes, Thermolytic, subclass 33 for a distillation process including the step of agitating the charge in the carbonizing zone. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function
202, Distillation: Apparatus, subclass 175 and 265 for distillation apparatus combined with agitating means for the distalland. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
204, Chemistry: Electrical and Wave Energy, subclass 221, 222, 223, 261, and 273, for electrolytic cells including agitating means. (For Agitating Apparatus Classified Elsewhere)
209, Classifying, Separating, and Assorting Solids, appropriate subclasses for methods and apparatus directed to subject matter of that class, and see particularly 233 for the combination of a sifter with an agitator. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
210, Liquid Purification or Separation, appropriate subclasses for methods and apparatus for separating solids from Liquids, and see particularly 198.1 or a separator with means to add treating material which may include agitating means. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
219, Electric Heating, 296 for an electric heating apparatus for a Liquid with means to circulate the Liquid in a fixed path in relation to heat surface so as to transfer heat to the Liquid. Where electrical heating means is only broadly claimed, placement will be in Class 366; but where details of the heater or control means for the heater are claimed, placement will be in Class 219. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
222, Dispensing, both Classes 222 and 366 have the combination of a container and a device operable on the container contents to mix the same, and means to discharge the contents. Class 366 takes (1) agitators with means to feed material thereto; (2) containers having means to agitate, which means are inoperable to assist discharge (e.g., where the agitator is inoperative during discharge) and such means combined with additional dispensing means; and (3) any means particularly designed to agitate with only an incidental discharge assisting function (e.g., those device in which the agitator must operate prior to a dispensing operation, even though it operates during and assists the
discharge operation). Class 222 takes containers of any kind with (1) devices particularly designed to convey material therefrom or produce a force on the material therein, in a discharge direction with only incidental agitation effect; (2) agitators combined with other nongravity discharge assistance and operable together only during the discharging operation (the agitator-receptacle subcombination going to Class 366); and (3) mere solid material bridge breakers operable to promote gravity flow toward a claimed container outlet or discharge assisting means. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
239, Fluid Sprinkling, Spraying, and Diffusing, appropriate subclasses for processes an apparatus (1) for projection or spraying material which required mixing just prior to or at discharge (e.g., resin type cements), usually with a catalyst to cause solidification or setting up, or (2) comprising particular nozzle structure of type provided for in Class 239, combined with agitation or mixing of ingredients in the supply means, provided the ingredients are not of the mortar type provided for in Class 366, 1. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
241, Solid Material Comminution or Disintegration, appropriate subclasses for processes and apparatus (1) in which agitating steps or means are combined with comminuting steps or means, or (2) which, by disclosure, will function to comminute the material even if a mixing function is also disclosed. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
252, Composition, appropriate subclasses for processes of making compositions provided therein which may include agitation of the material, and see the notes to the main class definition of Class 252. See also Lines With Other Classes, above. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
261, Gas and Liquid Contact Apparatus, appropriate subclasses for a process or apparatus for mixing a liquid with a gas. (For Agitating Apparatus Classified Elsewhere)
248, Supports, 128 for supports for mere movable receptacles, and subclasses 146+ for supports for stationary receptacles.
416, Fluid Reaction Surfaces (i.e., Impellers), appropriate subclasses for an impeller, per se, which may be useful as a stirrer but where the disclosed use in solely as an impeller, or alternatively as an impeller or stirrer. (For Agitator Subcombinations Classified Elsewhere)
425, Plastic Article or Earthenware Shaping or Treating: Apparatus, subclass 222 for tumbling type agglomerating apparatus for particulate material. (Apparatus Including
Agitating Incidental To Or Combined With Other Primary Function)
427, Coating Processes, subclass 242 for processes of coating by rumbling or tumbling. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
432, Heating, the residual class for generating heat and applying it to materials, 121 for a heating chamber with more than nominally recited heat generating means and including means for guiding or moving material to be heated through or moving material to be heated through or along sections of the chamber, or for agitating such material within the chamber. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
435, Chemistry: Molecular Biology and Microbiology, appropriate subclasses for fermentation processes and apparatus; see particularly 290.3 for a composting apparatus including an agitation means; subclasses 291.5+ for a malting or mashing apparatus, including an agitation means; subclasses 295.1+ for a bioreactor including a draft tube as a means for agitation; subclass 296.1 for a bioreactor with a sparging means for agitation; subclasses 297.2+ for perfusion bioreactors; subclass 298.2 for a rotatably mounted bioreactor; and subclass 303.3 for an agitated incubator. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
451, Abrading, 32 and 326+ for a process or apparatus disclosed for use in tumbling a workpiece for the purpose of abrading or surface finishing the workpiece. The abrading or surface finishing may be solely by mutual attrition of the workpieces or by an abrasive medium. (Apparatus Including Agitating Incidental To Or Combined With Other Primary Function)
475, Planetary Gear Transmission Systems or Components, appropriate subclasses, for planetary gear transmissions which might be used to transmit motion to a stirrer or mixing chamber; and particularly subclass 11 for rotary planetary output.

GLOSSARY:
AGITATOR
A stirrer or a deflector.
DEFLECTOR
(1) An element or device secured within and in fixed relation to the mixing chamber, or (2) a stationary device in a movable mixing chamber for diverting or separating portions of material and then permitting them to recombine so as to commingle, thus causing or assisting in agitation of the
material.
MATERIAL
A mass of fluid, viscous, particulate, or plastic substance which is to be agitated.
MIXING CHAMBER
A space bounded on at least three sides by well structure within which agitation takes place. The chamber may be in the form of a trough, a conduit, or a container of any shape. A supply reservoir or a conveyor for feeding material to a mixing chamber and which includes means for agitating the material prior to its entry into the mixing chamber will not be considered a mixing chamber.
OSCILLATING
Rotating alternately in opposite directions about an axis.
RECIPROCATING RECTILINEARLY
Moving bodily back and forth in a straight line in the same path so that at any instant, all parts of the moving body move in the same direction at the same rate.
ROCKING
Moving back and forth as a result of a back and forth motion of a curved surface on a flat surface.
ROTATING
Turning in but one direction about an axis.
STIRRER
A device which is movable by an applied force and which in its movement causes agitation of material. The force may be applied manually, by movement of the material, by relative motion of the chamber, or by a power source, either directly or through a drive train.
STIRRERS, PLURAL
Two or more devices or elements which are movable bodily by an applied force and which move bodily relative to each other an in such movement cause agitation of material. Where a plurality of like or diverse stirrer elements are in fixed relation to each other and move together as a unit they will be considered a single stirrer even if the elements are adjustable relative to each other prior to agitation or are flexible so that portions thereof move relative to each other during agitation.

MORTAR MIXER TYPE:
This subclass is indented under the class definition. Apparatus and corresponding methods peculiarly adapted for mixing mortar, asphaltic and hydraulic cement, concretes, and the like.

SEE OR SEARCH CLASS:
23, Chemistry: Physical Processes, subclass 287 for lime hydrators.
172, Earth Working, subclass 371 for mortar mixing hoes.
404, Road Structure, Process, or Apparatus, appropriate subclasses for (1) highway, pathway, or walkway structure, per se, and (2) process and apparatus for making, installing, repairing, or maintaining such structure, where such structure, process or apparatus is not otherwise classifiable as either (a) specifically provided for in other loci, or (b) of such general utility as to be provided for on that basis (see section III and IV under Class 404 class definition for known collections of such nature and the particular lines of demarcation).

Methods:
This subclass is indented under subclass 1. Processes of mixing mortar, asphaltic or hydraulic cement, concrete, and the like.

SEE OR SEARCH CLASS:
106, Compositions: Coating or Plastic appropriate subclass, particularly 273 and 638+ for processes of making mortar, asphaltic or hydraulic cement, concrete, and like which are not distinct from the compositions thereof.

Gas incorporating; fluid mixing, delivering, or conveying:
This subclass is indented under subclass 2. Processes comprising a step or steps of (1) incorporating air or gas with the product, or (2) mixing, delivering, and/or conveying the product through the medium of a fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
10 for corresponding apparatus.

SEE OR SEARCH CLASS:
406, Conveyors: Fluid Current, 86 for moving material along a surface by means of or with the assistance of a fluid current issuing from the surface and incidentally agitating the material; and subclasses 136+ for agitation of material in a receptacle which feeds to a fluid current conveyor.

With heating or cooling:
This subclass is indented under subclass 3. Processes which include the steps of modifying the temperature of the material.
(1) Note. The temperature modification may occur before, during, or after agitation.

Gas incorporating at delivery:
This subclass is indented under subclass 3. Processes which include the steps of introducing a fluid with a material at the deliver.

Treatment or preparation of material:
This subclass is indented under subclass 2. Processes which include other steps for making a material ready for mixing, or modifying a material for the purpose of facilitating the mixing.

SEE OR SEARCH THIS CLASS, SUBCLASS:
3 for process combinations involving gas incorporating, fluid mixing, discharging, and/or conveying.

SEE OR SEARCH CLASS:
137, Fluid Handling, 3 for fluid handling processes, including mixing plural fluids.

By heating or cooling:
This subclass is indented under subclass 6. Processes wherein the treatment or preparation is the step of modifying the temperature of the material.

By ingredient proportioning:
This subclass is indented under subclass 6. Processes wherein the treatment or preparation is the step of controlling the relative quantities of different materials which are mixed.

SEE OR SEARCH THIS CLASS, SUBCLASS:
16 for corresponding apparatus.
160.1 for feed means of general utility for feeding material in an adjustable ratio to a mixing chamber.
162.1 for feed means of general utility for feeding material to a mixing chamber in a predetermined fixed ratio.

Gravity type:
This subclass is indented under subclass 1. Subject matter wherein the mixing is effected by the single passage of streams of materials through intersecting paths or over baffles or the like obstructions which may be either stationary or movable, at least one of said streams being gravity impelled.
(1) Note. The term "single passage" is construed to exclude mixers such as those having rotting or oscillating receptacles which effect mixing by lifting and dropping material over a baffle or baffles a plurality of times.

SEE OR SEARCH THIS CLASS, SUBCLASS:
336 for similar mixers of general application.

With gas incorporating; fluid mixing, delivering, or conveying:
This subclass is indented under subclass 1. Subject matter for (1) incorporating air or gas with a material, or (2) having means for mixing, delivering and/or conveying a material through the medium of a fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
3 for corresponding processes.
25 for apparatus for heating ingredients during mixing by direct application of heated cases thereto.

SEE OR SEARCH CLASS:
222, Dispensing, 3 for gas dispensing, 630+ for fluid flow discharge, and 195 for gas agitation.
406, Conveyors: Fluid Current, 86 for moving material along a surface by means of or with the assistance of a fluid current issuing from the surface and incidentally agitating the material; and subclasses 136+ for agitation of material in a receptacle which feeds to a fluid current conveyor.

Gas incorporating at delivery nozzle:
This subclass is indented under subclass 10. Subject matter wherein the medium of a fluid is introduced with the material at the delivery nozzle.

Into rotating mixing chamber:
This subclass is indented under subclass 10. Subject matter wherein the medium of a fluid is introduced into a mixing chamber which revolves about a fixed axis in one direction only.

With rotatable stirrer:
This subclass is indented under subclass 10. Subject matter wherein the medium of a fluid is introduced into a mixing chamber which has a stirrer which turns in but one direction about an axis.

Plural mixing chambers:
This subclass is indented under subclass 1. Subject matter wherein the mixing is effected two or more separate mixing chambers.
(1) Note. The mixing chambers may be arranged to have either consecutive or alternative flow therethrough of the material being mixed, and the chambers may be concentrically arrange.
(2) Note. Where agitation is provided for in a container or conveyor and which agitation is incidental to the dynamic charging of a mixing chamber from the container or conveyor. Classification is in subclasses 30+.
(3) Note. For purposes of the classification, a compartmented mixing chamber is considered to be a single mixing chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
13 for a compartmental type rotatable mortar mixing chamber.

Intercommunicating:
This subclass is indented under subclass 14. Subject matter wherein the plural mixing chambers are in communication with each other so that the material being mixed may flow from one chamber to another.

With ingredient proportioning:
This subclass is indented under subclass 1. Subject matter including means for controlling or regulating the ratio of the ingredients to be mixed.

SEE OR SEARCH THIS CLASS, SUBCLASS:
8 for corresponding process.
160.1 for mixing ratio control of general use.

SEE OR SEARCH CLASS:
137, Fluid Handling, 88 and 98+ for proportioning means, per se.
177, Weighing Scales, subclass 61 for a weigh chamber translatable among plural sources.
222, Dispensing, subclass 57 and 129+ for dispensing of plural sources.

By condition sensing means:
This subclass is indented under subclass 16. Subject matter wherein the amount of ingredients to be added to a batch of mixed ingredients in the mixing chamber is controlled or regulated by (1) means in said chamber to detect a condition of said batch (e.g., temperature, density, etc.) or (2) means external said chamber to detect a condition of the chamber, per se (e.g., change in the amount of energy required to rotate the chamber).

By weight:
This subclass is indented under subclass 16. Subject matter wherein the ratio of the ingredients to be mixed is controlled or regulated by respectively weighing a quantity of each of a said ingredients, prior to charging the mixing chamber with the same.

SEE OR SEARCH THIS CLASS, SUBCLASS:
141 for weighing material of general use.

By volume:
This subclass is indented under subclass 16. Subject matter wherein the ratio of the ingredients to be mixed is controlled or regulated by respectively measuring a quantity of each of said ingredients volume, prior to charging the mixing chamber with said ingredients.

SEE OR SEARCH THIS CLASS, SUBCLASS:
160.5 for feed means of general utility for proportioning materials fed to a mixing chamber in which the volume of
material is measured.

By screw conveyor charging means:
This subclass is indented under subclass 16. Subject matter wherein controlled or regulated by having a different rotational speed and/or convolution size for the screw conveyor means used to dynamically charge the mixing chamber with said ingredients.

By varying opening of charging means:
This subclass is indented under subclass 16. Subject matter wherein the ratio of ingredients to be mixed is controlled or regulated by respectively adjusting the gets or valve means at each other outlet opening of the charging means to vary the size of said opening and thereby control the amount of ingredients that egress the charging means and flow into the mixing chamber.

With heating or drying:
This subclass is indented under subclass 1. Subject matter including means to heat or dry a material before, during, and/or after the mixing operation.
(1) Note. The material may be subjected to agitation during the preheating operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
14 for plural mortar mixers.

SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, and see the note to the main class definition for the line.
404, Road Structure, Process, or Apparatus, 90, 92, 95, and 108+ for road making apparatus including heating means.

Heating mixing chamber and ingredient preheater:
This subclass is indented under subclass 22. Subject matter wherein the heating means heats the material prior to and during the mixing in a mixing chamber.

Heating mixing chamber:
This subclass is indented under subclass 22. Subject matter wherein the heating means heats a mixing chamber.

By hot gases to interior:
This subclass is indented under subclass 24. Subject matter wherein the heating means is a high temperature fluid introduced within the mixing chamber.

With elevating means:
This subclass is indented under subclass 1. Subject matter including means for bodily raising and lowering the mixing chamber as a unit to convey the chamber from a charging station to a delivery station.

SEE OR SEARCH THIS CLASS, SUBCLASS:
45 for mixer receptacles which merely tilt to dump.

SEE OR SEARCH CLASS:
212, Traversing Hoists, for elevating means of that class type.
254, Implements or Apparatus for Applying Pushing or Pulling Force, for elevating means of that class type.
414, Material of Article Handling, 592 for an elevator or hoist and loading or unloading means therefor, and see the search notes of that subclass for other subclasses of that class (414) which include means for raising or lowering a load.

With dynamic charging and dynamic delivery:
This subclass is indented under subclass 1. Subject matter including means for directly applying a force to a material in order to move the material toward or into the mixing chamber and forcible removing material therefrom.
(1) Note. For purposes of this classification the term "charging" has been limited to positively feeding aggregates or conducting liquid to the mixer receptacle.

SEE OR SEARCH THIS CLASS, SUBCLASS:
16 for proportioning and feeding of ingredients.

Interrelated:
This subclass is indented under subclass 27. Subject matter including means for mechanically or otherwise connecting the charging and delivery means to operate in a related manner.

SEE OR SEARCH THIS CLASS, SUBCLASS:
131 for interrelated feed and discharge of mixers having general use.

With automatic control means:
This subclass is indented under subclass 28. Subject matter including means (1) to directly control the operation of the charging and delivery means, or (2) to control the enabling or disabling of devices for manually controlling the charging and delivery means.

SEE OR SEARCH CLASS:
235, Registers, subclass 128 and 132 for rotation counters with alarm or predetermined stop mechanism.

With dynamic charging:
This subclass is indented under subclass 1. Subject matter including means for directly applying force to a material in order to move the material toward or into the mixing chamber,
and the corresponding methods.
(1) Note. This subclass does not include those methods and devices in which material is permitted to enter the mixing chamber solely under the influence of gravity.
(2) Note. The material to which the force is applied may be any one of the components of the mixture and may be liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
41 for a gravity type charge hopper or chute.
76.3 for a screw conveyor for feeding material into a rubber or heavy plastic working apparatus.

By vibration:
This subclass is indented under subclass 30. Subject matter wherein the force is applied to the material by vibrating element in the path conducting the material to the mixing chamber.
(1) Note. The vibrating element may be an element of the device conducting the material to the mixing chamber.
(2) Note. The vibratory motion may be induced by a single striking movement upon the vibrating element.

Of skip or hopper:
This subclass is indented under subclass 31. Subject matter wherein the vibration is applied to one or more walls of a skip or hopper supplying the material to the mixing chamber.

Plural charge means:
This subclass is indented under subclass 30. Subject matter having more than one charging means.
(1) Note. Included herein are mixing chambers having both dynamic and static (e.g., hopper) charger means.
(2) Note. If a single dynamic charge device applies force to a plurality of streams of material, classification will be in
subclass 30.

Including dynamic liquid charge:
This subclass is indented under subclass 33. Subject matter wherein at least one of the charge means applies force directly to a liquid to move the liquid into the mixing chamber.
(1) Note. The force applying means is generally of the pump type. Where the force applying means is of the gravitational type or is unspecified, classification will be in subclass 36 or 40, as appropriate.
(2) Note. Where such force applying means is the only charge means, classification is in subclass 30.

Including screw conveyor:
This subclass is indented under subclass 33. Subject matter wherein at least one of the charge means includes a screw conveyor.

SEE OR SEARCH THIS CLASS, SUBCLASS:
20 for ingredient proportioning by screw conveyor charging means.
38 for a single charge by a screw conveyor.

Skip and liquid:
This subclass is indented under subclass 33. Subject matter wherein the dynamic charge means is a skip or tilting bucket, and another charge means conducts liquid to the mixing chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
34 for a dynamic type liquid charge means.

SEE OR SEARCH CLASS:
414, Material or Article Handling, appropriate subclasses for skip handling structure, per se.

Plural dynamic:
This subclass is indented under subclass 33. Subject matter having more than one charge means and a force is applied directly to the material in each charge means.

By screw conveyor:
This subclass is indented under subclass 30. Subject matter wherein the force applying means is a screw conveyor.

SEE OR SEARCH THIS CLASS, SUBCLASS:
35 for a similar device with additional charge means.
76.3 for a screw conveyor for feeding material into a rubber or heavy plastic working apparatus.

Skip:
This subclass is indented under subclass 30. Subject matter wherein the dynamic charge means is a skip or tilting bucket.

SEE OR SEARCH THIS CLASS, SUBCLASS:
36 for a skip and liquid charging device.

SEE OR SEARCH CLASS:
414, Material or Article Handling, subclass 683 for a device for loading a concrete mixer which device includes means for swinging it in a vertical plane.

With liquid charge:
This subclass is indented under subclass 1. Subject matter including means for supplying liquid to the mixing chamber without the direct application of force to the liquid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
30 for dynamic charge liquid to the mixing chamber.
33 for charge of liquid additional to the dynamic charge of other material to the mixing chamber.

Movable charge hopper or chute:
Subject matter under 1 wherein material is supplied to a mixing chamber by a container or static conveyor, at least one portion of which is capable of relative motion with respect a mixing chamber.
(1) Note. Motion of the mixing chamber to effect mixing (e.g., rotation) is not considered relative motion as used herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:
30 for dynamic charge means.
33 for similar devices combined with dynamic charge means.

With dynamic delivery:
This subclass is indented under subclass 1. Subject matter including (1) means movable to remove mixed material from a mixing chamber, or (2) means to move a movably mounted mixing chamber to effect discharge thereof.

Including automatic control means:
This subclass is indented under subclass 42. Subject matter comprising automatic means (1) to directly control the discharging means, or (2) to control the enabling or disabling of devices for manually controlling the discharge means.

SEE OR SEARCH THIS CLASS, SUBCLASS:
29 for intercontrol of feed and discharge.

Rotatable mixing chamber reversible for delivery:
Subject matter under 42 wherein the mixing chamber effects agitation by rotation and has cooperating means therein to effect delivery when rotated in the direction opposite to that in which agitation is effected.

Mixing chamber tiltable for delivery:
This subclass is indented under subclass 42. Subject matter wherein the mixing chamber is movably mounted so that it may tilt and discharge its contents.

SEE OR SEARCH THIS CLASS, SUBCLASS:
26 for mixers which are bodily elevated from a loading to a discharging position.
53 for oscillating mixers which move to an extreme position to dump.
185 for tilting mixing chamber.

SEE OR SEARCH CLASS:
222, Dispensing, 160, especially subclass 166 for this type of discharge means in general.

With stirrer:
This subclass is indented under subclass 45. Subject matter wherein the mixing chamber has a stirrer therein.

Hand operated tilt:
This subclass is indented under subclass 45. Subject matter wherein the mixing chamber has means associated therewith enabling the operator to tilt the chamber by hand.
(1) Note. Included in this subclass are mixers that have a manual lever or a hand crank for tilting the mixer.

Wheelbarrow-type support:
This subclass is indented under subclass 47. Subject matter wherein the mixing chamber is supported on a frame comprising two elements which have a single ground contacting wheel there between forwardly of the chamber and which extend rearwardly of the chamber to terminate in handle portions.

Endless belt:
This subclass is indented under subclass 42. Subject matter wherein the means to remove the mixed material from the chamber is an endless conveyor.

Rotary screw:
This subclass is indented under subclass 42. Subject matter wherein the means to remove the mixed material from the chamber is a rotatable auger screw conveyor.

Pump:
This subclass is indented under subclass 42. Subject matter wherein the means to remove the mixed material from the chamber is a pump which directly forces or induces material from the mixing chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
50 wherein the pump is a rotary screw.

Scraper or deflector:
This subclass is indented under subclass 42. Subject matter wherein the means for removing material from the mixing chamber is a scraper or a deflector.
(1) Note. The scraper or deflector is so mounted as to
direct material through the discharge opening of the mixer.

Movable mixing chamber:
This subclass is indented under subclass 1. Subject matter wherein mixing is effected by movement of the mixing chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
26 for a mixing chamber moved bodily by elevating means which also moves the chamber to effect mixing.
219 for agitators of general application with a movable mixing chamber.

Rotatable:
This subclass is indented under subclass 53. Subject matter wherein the mixing chamber turns about an axis in one direction only.
(1) Note. Included herein are surface contacting rolling chambers as well as wheel supported chambers wherein rolling contact of the wheels causes rotation of the chamber.
(2) Note. The placement of a rotatable mixing chamber upon an independently movable platform-type support is not deemed to impart an additional motion to the chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
213 and 220+, for a rotatable mixing chamber.

With additional diverse motion:
This subclass is indented under subclass 54. Subject matter wherein the mixing chamber has a component of motion additional to its rotation.
(1) Note. Included herein are surface contacting rolling chambers as well as wheel supported chambers wherein rolling contact of the wheels causes rotation of the chamber.
(2) Note. The placement of a rotatable mixing chamber upon
an independently movable platform-type support is not deemed to impart an additional motion to the chamber.

With agitator:
This subclass is indented under subclass 54. Subject matter wherein the rotatable mixing chamber includes an agitator therein.

Rigid deflector fixed to chamber wall:
This subclass is indented under subclass 56. Subject matter wherein the agitator is a nonflexible device secured within the mixing chamber to divert a portion of the material to assist agitation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
44 for a similar device in which reversal of the direction of rotation causes the deflector to convey the material through a discharge means.
52 for a similar device in which the deflector conveys the material through a discharge means after agitation.

Compartmental-type chamber:
This subclass is indented under subclass 57. Subject matter wherein the deflector forms a partition dividing the mixing chamber into a plurality of sections.

SEE OR SEARCH THIS CLASS, SUBCLASS:
14 for plural distinct mortar mixing chambers.

Helical:
This subclass is indented under subclass 57. Subject matter wherein the deflector has a helical configuration.

With specified actuating or control means:
This subclass is indented under subclass 54. Subject matter including a particularly described means for effecting rotation of the mixing chamber.
(1) Note. Mere recitation of "drive means" of "actuating means" for the mixing chamber will not be considered specified actuating means.

Hydraulic drive or control:
This subclass is indented under subclass 60. Subject matter wherein the actuating or control means includes a device actuated or controlled by a liquid under pressure.

With specified support structure:
This subclass is indented under subclass 54. Subject matter including a particularly described element of structure for supporting the mixing chamber.
(1) Note. Mere recitation of "support", "support means frame", and the like will not be considered specified support structure.

Specified rotational mounting:
This subclass is indented under subclass 62. Subject matter wherein the support structure includes a particularly described element for permitting rotational movement of the chamber about an axis.

Movable stirrer:
This subclass is indented under subclass 1. Subject matter comprising a stirrer which has relative motion with respect to a mixing chamber.

Vertical mixing chamber:
This subclass is indented under subclass 64. Subject matter wherein the mixing chamber is used in an upright position during agitation.
(1) Note. The mixing chamber is a tank, cylinder, etc.

Plural stirrers:
This subclass is indented under subclass 64. Subject matter having more than one stirrer.

Including scraper, wiper, or brush:
This subclass is indented under subclass 64. Subject matter including an element having an edge, or a plurality of bristles movable in contact with or in close proximity to a wall of the chamber for removing material from the wall surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:
309 for rotatable stirrer including a scraper, wiper, or brush.

Movable chute:
This subclass is indented under subclass 1. Subject matter comprising a static conveyor and at least one portion of which is capable of relative motion with respect to a mixing chamber.

RUBBER OR HEAVY PLASTIC WORKING:
This subclass is indented under the class definition.
Apparatus and method including a mixing chamber and an agitator therein for use in kneading substantially self-sustaining, semisolid, or heavy plastic material such as clay, dough, gum, plastic, resin, or similar heavy plastic.
(1) Note. A patent for apparatus or method for mixing ingredients for making a plastic mass and kneading the mass will be placed in this or an indented subclass. However, an apparatus or method for mixing the ingredients without further kneading the mass will be placed in an appropriate subclass elsewhere in this class.
(2) Note. In regard to the line between Class 241 and Class 366, see search note to Class 366 under Class 241 definition, section 12.
(3) Note. Kneading is a process to work substantially self-sustaining, semisolid, or heavy plastic material into a uniform mixture by pressing, folding, and stretching.

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

Candy puller type:
This subclass is indented under subclass 69. Subject matter comprising spaced arms mounted for relative motion toward and away from each other whereby said material is kneaded by repeated stretching and recombining of stretched portions.

Roll couple and scraper:
This subclass is indented under subclass 69. Subject matter wherein the agitator comprises a pair of rollers for pressing the material therebetween and means for removing said material therefrom.

SEE OR SEARCH THIS CLASS, SUBCLASS:
309 for a rotatable stirrer including a scraper, wiper, or
brush.

SEE OR SEARCH CLASS:
492, Roll or Roller, for a roll, per se, not elsewhere provided for.

Roll couple and work handler:
This subclass is indented under subclass 69. Subject matter wherein the agitator comprises a press couple comprises rolls with means to adjust the space between each roll.

SEE OR SEARCH CLASS:
100, Presses, 155 for concurrent pressing and conveying apparatus including a roll.
492, Roll or Roller, for a roll, per se, not elsewhere provided for.

Roll couple having adjustment means:
This subclass is indented under subclass 69. Subject matter wherein the agitator comprising a press couple comprises rolls with means to adjust the space between each roll.

SEE OR SEARCH CLASS:
100, Processes, 155 for concurrent pressing and conveying apparatus including a roll, and subclasses 168+ for roll adjustment.
492, Roll or Roller, for a roll, per se, not elsewhere provided for.

Roll traveling within platen:
This subclass is indented under subclass 69. Subject matter wherein the agitator comprises a press couple including a roll coacting with the interior of said mixing chamber or receptacle type of platen.

SEE OR SEARCH THIS CLASS, SUBCLASS:
241 for a mixing means comprising a stirrer with a stationary mixing chamber.

SEE OR SEARCH CLASS:
100, Presses, subclass 156 for a concurrent pressing and conveying apparatus comprising external and internal rolls, and subclass 210 for a roll and platen-type press.

With specified vent means:
This subclass is indented under subclass 69. Subject matter including means in said mixing chamber or in a stirrer for releasing gas from said mixing chamber.

With specified feed means:
This subclass is indented under subclass 69. Subject matter including a particularly described means for conveying or admitting material into said mixing chamber.
(1) Note. Mere recitation of an opening, inlet port, or feed conduit for the material will not be considered specified feed means. However, any of the following claimed particulars will be considered specified means for this subclass: (a) Means applying positive or negative pressure on material to move it into the chamber (e.g., pump). (b) Conveyor means (e.g., belt, screw, chute). (c) Feed control means (e.g., valve, gate). (d) Structure determining the proportions of different material fed to the chamber. (e) A feed conduit extending into the mixing chamber or in tangential relation to the chamber. (f) A plurality of feeders (conduits, chutes, hoppers, etc.) in a particular relation to each other and/or to the mixing chamber. (g) A supply reservoir and means to feed material from the reservoir into the chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
150.1 for general purpose mixing apparatus having specified feed means.

SEE OR SEARCH CLASS:
222, Dispensing, appropriate subclasses, for material dispensing apparatus, per se. See References to Other Classes in the class definition of this class (366) for the line between Class 366 and Class 222.

Condition responsive:
This subclass is indented under subclass 76.1. Subject matter including a detector for sensing a variable condition of the apparatus or of the material and means for initiating or modifying the movement of material into the mixing chamber in response to a signal from the detector.

SEE OR SEARCH THIS CLASS, SUBCLASS:
151.1 for condition responsive means in general purpose mixing apparatus.

Screw feeder distinct from agitator:
This subclass is indented under subclass 76.1. Subject matter wherein the means for conveying or admitting material is a continuous helical blade which is rotated about its longitudinal axis and is clearly distinguishable in function and structure from the agitator in the mixing chamber

SEE OR SEARCH THIS CLASS, SUBCLASS:
35 38, and 50, for a mortar mixer having a screw conveyor for feeding material to or discharging material from a mixing chamber.
133 and 156.1+, for a mixing apparatus in which material is fed into a mixing chamber by a screw conveyor.

Plural screws:
This subclass is indented under subclass 76.3. Subject matter wherein the means for conveying comprises more than one rotary helical blade.
(1) Note. There may be a single feeder with plural screws or plural feeders each of which has a screw.

SEE OR SEARCH THIS CLASS, SUBCLASS:
156.2 for a similar feed means for materials other than rubber or heavy plastic in which material is fed into a mixing chamber by a plurality of screw conveyors.

Roller feeder:
This subclass is indented under subclass 76.1. Subject matter wherein the conveying or admitting means has an elongated member which is rotated to feed material to the mixing chamber.

Plural feed means:
This subclass is indented under subclass 76.1. Subject matter including a plurality of means for conveying or admitting material into the mixing chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
177.1 for mixing apparatus of general utility having plural feed means.

Piston feeder (e.g., ram):
This subclass is indented under subclass 76.1. Subject matter including a member movable along a straight path in the direction of feed of material to move the material into the mixing chamber.

Mixing rotor having recess for material:
This subclass is indented under subclass 76.7. Subject matter wherein the agitator comprises a rotor having a recess or pocket (e.g., a blind bore) for receiving the material.

Chute or hopper with gravity discharge:
This subclass is indented under subclass 76.1. Subject matter wherein material is supplied to the mixing chamber solely by gravity by way of a chute or hopper.
(1) Note. A hopper is a funnel shaped container, usually,
but not necessarily used for dispensing solids. A chute is an open-topped channel or conduit for guiding material.

SEE OR SEARCH THIS CLASS, SUBCLASS:
41 for a movable charge hopper or chute for a mortar mixer.
68 for a movable chute for a mortar mixer.
181.1 for a mixing apparatus of general utility having plural feeders including a chute or hopper with gravity discharge to a mixing chamber.
183.1 for mixing apparatus including a static conveyor with gravity discharge to a mixing chamber.

Having plural means to feed material to chute or hopper:
This subclass is indented under subclass 76.9. Subject matter including plural means to feed material to the hopper or chute.

SEE OR SEARCH THIS CLASS, SUBCLASS:
177.1 for a mixing apparatus including plural means for feeding material to a mixing chamber.

Having discharge valve:
This subclass is indented under subclass 76.9. Subject matter including a gate or closure for controlling release of material from the chute or hopper.

SEE OR SEARCH THIS CLASS, SUBCLASS:
181.3 for a hopper having a gate or valve in an outlet thereof.
182.3 for a container with a valved outlet.

Including specific structure for controlling flow through the feed means:
This subclass is indented under subclass 76.1. Subject matter including particularly described means to start, stop,
or regulate the flow of material in the feed means.
(1) Note. More than the mere recitation of a valve or pump is required for placement of a patent in this subclass. There must be a claim of valve details, a valve operator mechanism, pump feed rate adjustment means, or other feature directly related to adjustment or control of the material flow rate.

SEE OR SEARCH THIS CLASS, SUBCLASS:
160.1 through 160.5, for apparatus including mixing ratio control means.
165.4 for feed means including a flow regulator in a mixing apparatus in which material has rotary motion.
182.1 for feed means including details of means for controlling flow through the feed means.

With specified discharge means:
This subclass is indented under subclass 69. Subject matter including a particularly described means for conveying or releasing said material from said mixing chamber.
(1) Note. Mere recitation of an opening, outlet port, or discharge conduit for the material will not be considered specified discharge means. However, any of the following claimed particulars will be considered as specified means for this subclass: (a) Means applying pressure on the material to move it out of the chamber (e.g., pump). (b) Conveyor means (e.g., belt, chute, screw). (c) Discharge control means (e.g., valve gate).

SEE OR SEARCH THIS CLASS, SUBCLASS:
184 for discharge means of general application.

Rotating and reciprocating stirrer:
This subclass is indented under subclass 69. Subject matter including a stirrer which turns in but one direction about a fixed axis and moves back and forth in a straight line along said fixed axis simultaneously or alternately to produce mixing and kneading.

SEE OR SEARCH THIS CLASS, SUBCLASS:
241 for rotating and reciprocating stirrer within stationary
mixing chamber of general utility.

Stirrer is through-pass screw conveyor:
This subclass is indented under subclass 69. Subject matter wherein the mixing chamber is designed to receive material at one end of a path and to discharge it at the other end in a continuous flow, and said agitator comprises a stirrer having a helical ribbon or thread type conveyor rotatable so as to mix and knead the material concurrent with conveying it through said path.

SEE OR SEARCH THIS CLASS, SUBCLASS:
318 for screw-type stirrer within a stationary mixing chamber.

SEE OR SEARCH CLASS:
100, Presses, 144 for a concurrent pressing and conveying apparatus of general application. See the search notes in Class 100, subclass 144.
198, Conveyors: Power-Driven, 657 for a conveying element of the screw type.
415, Rotary, Kinetic Fluid Motors or Pumps, 72 for a pump including a rotary screw.

With deflector:
This subclass is indented under subclass 79. Subject matter including a device secured within and in fixed relation to said mixing chamber for assisting said conveyor in mixing and kneading.

SEE OR SEARCH THIS CLASS, SUBCLASS:
336 for stationary deflector in flow-through mixing chamber of general utility.

With additional stirrer element on screw conveyor:
This subclass is indented under subclass 79. Subject matter wherein said conveyor includes an additional element on the
ribbon or thread (e.g., pin, blade, rib) to assist mixing and kneading.

SEE OR SEARCH THIS CLASS, SUBCLASS:
319 for screw-type stirrer with additional agitator on screw within a mixing chamber of general utility.

Ring or disk:
This subclass is indented under subclass 81. Subject matter wherein the additional stirrer element comprises an annulus integral with or affixed to the shaft of said conveyor.
(1) Note. The ring or disk may be apertured, grooved, or may have other outer surface configuration.

Plural screw conveyors on separate shafts:
This subclass is indented under subclass 9. Subject matter comprising separate shafts for distinct helical ribbon or thread-type conveyors.

SEE OR SEARCH THIS CLASS, SUBCLASS:
292 for plural stirrers within a stationary mixing chamber of general utility.

In parallel intercommunicating mixing chambers:
This subclass is indented under subclass 83. Subject matter wherein said conveyors are located within a plurality of mixing chambers having main axes parallel to each other and each mixing chamber is in communication with each other so that material may flow from one mixing chamber to another.

SEE OR SEARCH THIS CLASS, SUBCLASS:
290 for stirrer in at least one of intercommunicating adjacent mixing chambers having general utility.
301 for kneaders in plural chambers.

Screw conveyors intermeshing:
This subclass is indented under subclass 84. Subject matter wherein one of said conveyors has a profile which contacts a mating surface of parallel screw conveyor along the length thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:
301 for parallel stirrers intermeshing with each other in a mixing chamber of general utility.

Intercommunication by conduit:
This subclass is indented under subclass 84. Subject matter wherein the communication between each mixing chamber is by means of an elongated, hollow tube.

And downstream breaker plate or screen:
This subclass is indented under subclass 79. Subject matter including foraminous means (e.g., grate, lattice, screen, etc.) located at the discharge end of said conveyor.

Including sections of different pitch:
This subclass is indented under subclass 79. Subject matter wherein the spacing of thread or helical ribbon on a portion of said conveyor differs from the spacing of said thread or said helical ribbon on another portion.

SEE OR SEARCH THIS CLASS, SUBCLASS:
321 screw-type stirrer with opposite pitch in a mixing chamber of general utility.
323 screw-type stirrer with varying pitch in a mixing chamber of general utility.

Varying diameter of shaft:
This subclass is indented under subclass 79. Subject matter wherein the diameter of a portion of the shaft of said conveyor differs from the diameter of the shaft on another portion.

SEE OR SEARCH THIS CLASS, SUBCLASS:
323 for screw-type stirrer with varying convolutions or shank or varying pitch in a mixing chamber of general utility.

Notched, apertured, or interrupted thread:
This subclass is indented under subclass 79. Subject matter wherein said thread or said helical ribbon has an opening therethrough or a discontinuous portion thereon.

SEE OR SEARCH THIS CLASS, SUBCLASS:
322 for discontinuous screw stirrers in a mixing chamber of general utility.
324 for screw-type stirrer with apertured or notched threads in a mixing chamber of general utility.

Plural mixing chambers:
This subclass is indented under subclass 69. Subject matter wherein said material is kneaded within a plurality of mixing chambers.
(1) Note. Mixing chambers which are in communication with each other so that material may flow from one chamber to another will be placed in this subclass. Moreover, the communication may be by means of a conduit, or through a conduit, or through or across a portion separating the chambers.

SEE OR SEARCH THIS CLASS, SUBCLASS:
290 for stirrer within at least one of intercommunicating adjacent mixing chambers of general utility.

With means to move mixing chamber:
This subclass is indented under subclass 69. Subject matter including a particularly described means for moving said mixing chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
130 for an operator supported mixing chamber of general utility.
197 for a mixing chamber of general utility removable from stirrer and support.
208 for agitation by movement of support for a mixing chamber of general utility.
219 for agitation by movement relative to a stationary support of a mixing chamber having general utility.

Rotating mixing chamber:
This subclass is indented under subclass 92. Subject matter wherein said mixing chamber turns in but one direction about its own axis.

With rotating stirrer:
This subclass is indented under subclass 93. Subject matter including a stirrer which turns in but one direction about a fixed axis within said rotating mixing chamber.

Single stirrer:
This subclass is indented under subclass 94. Subject matter wherein only one rotating stirrer is within said rotating mixing chamber.
(1) Note. Where a plurality of like or diverse stirrer elements are in fixed relation to each other and move together as a unit they will be considered as single stirrer even if the elements are adjustable relative to flexible so that portions thereof move relative to each other during agitation.

Stationary mixing chamber:
This subclass is indented under subclass 69. Subject matter wherein said mixing chamber is in a fixed position during kneading.

SEE OR SEARCH THIS CLASS, SUBCLASS:
241 for stirrer within stationary chamber for general application.

With rotating stirrer:
This subclass is indented under subclass 96. Subject matter comprising a stirrer which turns in but one direction about a fixed axis within said stationary mixing chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
279 for a rotatable stirrer in a fixed mixing chamber with general utility.

Single stirrer:
This subclass is indented under subclass 97. Subject matter wherein only one rotating stirrer is within said stationary mixing chamber.
(1) Note. Where a plurality of like or diverse stirrer elements are in fixed relation to each other and move together as a unit they will be considered a single stirrer even if the elements are adjustable relative to each other prior to agitation or are flexible so that portions thereof move relative to each other during agitation.

Horizontal:
This subclass is indented under subclass 98. Subject matter wherein the axis of said rotating single stirrer is horizontal.

Stirrer with specified drive means:
This subclass is indented under subclass 69. Subject matter wherein the mixing chamber includes a stirrer and a particularly described means for drive said stirrer to mix and knead.
(1) Note. Mere recitation of a motor would not be considered as specified drive means.

BY INJECTING GAS INTO MIXING CHAMBER:
This subclass is indented under the class definition. Apparatus and corresponding methods wherein the agitation is effected by the introduction of a gas under pressure into contact with the material in the mixing chamber.
(1) Note. The injection of gas into a liquid must be primarily for agitating the liquid. If the primary purpose is to mix the gas with the liquid, placement will be in Class 261, and see note to that class below.

SEE OR SEARCH THIS CLASS, SUBCLASS:
163.1 for a device wherein material, which may include air, is fed into the mixing chamber by suction.

SEE OR SEARCH CLASS:
222, Dispensing, subclass 195 for dispensing combined with gas agitation.
239, Fluid Sprinkling, Spraying, and Diffusing, subclass 143 for gas effected agitation of supply for a fluid sprinkling or spraying device, and subclasses 654+ for gas effected agitation of supply for nonfluid material sprinkling or spraying device.
261, Gas and Liquid Contact Apparatus, appropriate subclasses for apparatus for mixing a liquid with a gas.
406, Conveyors: Fluid Current, subclass 88, 90+, and 136+ for agitation of a solid material in a receptacle by injecting gas into the receptacle.
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, 10 for foam colloid systems or agents for such systems or making or stabilizing such systems or agents, when
generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.

With stirrer:
This subclass is indented under subclass 101. Subject matter which also includes a stirrer in the chamber.

Plural stirrers:
This subclass is indented under subclass 102. Subject matter wherein there is more than one stirrer.

Diverse:
This subclass is indented under subclass 103. Subject matter wherein one stirrer differs in structure from another stirrer.

Into rotating mixing chamber:
This subclass is indented under subclass 101. Subject matter wherein the chamber is rotatable and the gas is injected into the chamber while it is rotating.

SEE OR SEARCH THIS CLASS, SUBCLASS:
219 for a chamber which is rotatable and has additional motion.
220 for a rotatable mixing chamber.

Intermittent or pulsating feed:
This subclass is indented under subclass 101. Subject matte wherein the gas is introduced in recurrent interrupted
sequence or in recurrent variation in flow rate.

Plural gas feeders:
This subclass is indented under subclass 101. Subject matter wherein the gas is introduced into the chamber through more than one feeder.

BY VIBRATION:
This subclass is indented under the class definition. Apparatus and corresponding methods wherein the agitation of the material is effected by the action of a vibratory device producing rapid to and from movement of portions of the material, of the mixing chamber, of a portion of the chamber well or of a stirrer, or by rapid to and from movement of a stirrer energized by flow of the material there against.
(1) Note. A patent for vibratory device, per se, disclosed for use as a stirrer by insertion with a mass of of material will be place in subclasses 117+ below, and see the search notes thereto.

SEE OR SEARCH CLASS:
134, Cleaning and Liquid Contract With Solids, subclass 1 for a method of cleaning articles by vibration.
222, Dispensing, 196 for dispensing combined with agitation by vibration.
414, Material or Article Handling, subclass 683 for a device for loading a concrete mixer, which device includes means for swinging it in a vertical plane.
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, appropriate subclasses for subject matter relating to: colloid systems (such as sols*, emulsions, dispersions, foams, aerosols, smokes, gels, or pastes) or wetting agents (such as leveling, penetrating, or spreading); subcombination compositions of colloid systems containing at least an agent specialized and designed for or peculiar to use in making or stabilizing colloid systems; compositions and subcombination compositions specialized and designed for or peculiar to use in breaking (resolving) or inhibiting colloid systems; processes of making the compositions or systems of the class; processes of breaking (resolving) or inhibiting colloid systems; in each instance, when
generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.

Including endless conveyor:
This subclass is indented under subclass 108. Subject matter including an endless means (e.g., belt, chain, rotary turret) for moving the material, or a mixing chamber containing the material through a zone where the agitation takes place.

Of holder for mixing chamber:
This subclass is indented under subclass 108. Subject matter wherein the vibrator device is attached to a receptacle or clasp for the mixing chamber, and wherein the vibration of the mixing chamber results from the operation of the vibratory device.
(1) Note. For proper placement of a patent in this subclass, the mixing chamber does not have to be claimed.

SEE OR SEARCH THIS CLASS, SUBCLASS:
197 for a device wherein the mixing chamber is removable from a stirrer and its support.
208 for agitation by mechanical movement of a support for a removable mixing chamber.
219 for agitation of material by mechanical movement of a mixing chamber relative to a stationary support.

Of platform or mixing chamber supported by vibrator:
This subclass is indented under subclass 108. Subject matter wherein the vibratory device directly supports the mixing chamber or a platform for supporting the mixing chamber.
(1) Note. For proper placement of a patent in this subclass, the mixing chamber does not have be claimed.

SEE OR SEARCH THIS CLASS, SUBCLASS:
114 for a device wherein a platform for the mixing chamber
is attached to the vibratory device.
197 for a device wherein the mixing chamber is removable mixing chamber.
219 for agitation of material by mechanical movement of a mixing chamber relative to a stationary support.

Supported by vibrator solely:
This subclass is indented under subclass 111. Subject matter wherein the platform of the mixing chamber is supported solely by the vibratory device.

Vibrator mounted in aperture of mixing chamber bottom wall:
This subclass is indented under subclass 108. Subject matter wherein the vibratory device is secured in an opening in the bottom wall of the mixing chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
197 for a mixing chamber removable from the stirrer and its support.
208 for agitation by mechanical movement of a support for the mixing chamber.
219 for agitation of material by mechanical movement of a mixing chamber relative to a stationary support.

Vibrator attached to mixing chamber wall or platform:
This subclass is indented under subclass 108. Subject matter wherein the vibratory device is fastened to the mixing chamber wall or to platform adapted to support the mixing chamber.
(1) Note. For proper placement of a patent in this subclass, the mixing chamber does not have to be claimed.

SEE OR SEARCH THIS CLASS, SUBCLASS:
111 for a device wherein a platform for the mixing chamber is merely supported by the vibratory device.

By bonding:
This subclass is indented under subclass 114. Subject matter wherein the vibratory device is adhered or welded to the mixing chamber wall or to the platform.

With amplitude or frequency regulator:
This subclass is indented under subclass 108. Subject matter including means for regulating or controlling the amplitude or frequency of the vibration.
(1) Note. Mere recitation of a switch with no particularly described means for regulating the frequency or the amplitude of the vibration is not sufficient for placement of a patent in this subclass.

Of stirrer:
This subclass is indented under subclass 108. Subject matter wherein the agitation of the material is effected by a stirrer activated by a vibratory device, or wherein the stirrer is a vibratory device acting directly on the material.
(1) Note. A patent for a vibratory device, per se, disclosed for use as a stirrer by insertion within a mass of material will be placed in this or an appropriate indented subclass.

SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclasses 20-110 for a mechanical vibrator, per se.
173, Tool Driving or Impacting, appropriate subclass for the combination of a toll and a tool driving or impacting means which combination is not limited to a specific tool art, such as specific shape of the work contacting portion of the tool, related tools, or an opposed work support.
310, Electrical Generator or Motor Structure, 328 for piezoelectric vibrators.

In mixing chamber:
This subclass is indented under subclass 117. Subject matter wherein the stirrer is within a mixing chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:
243 for an oscillatable stirrer mounted in a removable closure of a stationary mixing chamber.
276 for an oscillatable stirrer within a stationary mixing chamber.

Actuated by flow of material:
This subclass is indented under subclass 118. Subject matter wherein the flow of the material thereagainst as it is fed into the mixing chamber.

Pencil type:
This subclass is indented under subclass 117. Subject matter wherein the stirrer comprises an elongated slender housing enclosing the vibratory device and which is intended for insertion manually into the material by the user.

With lubricating means:
This subclass is indented under subclass 120. Subject matter including means to lubricate the moving parts in the stirrer.

Specified end structure:
This subclass is indented under subclass 120. Subject matter including structure mounted at either end of the stirrer (e.g., nose cap, handle, etc.).

Actuated by rotary movement of unbalanced- weight shaft:
This subclass is indented under subclass 120. Subject matter wherein the vibration of the stirrer is caused by the unbalanced weight which is mounted eccentrically on a rotatable shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:
128 for a general type of vibrator actuated by rotary movement of unbalanced-weight shaft.

SEE OR SEARCH CLASS:
173, Tool Driving or Impacting, subclass 49 for a drive means for a tool as provided for in that class which includes a rotating eccentric mass.

Vibrator actuated by fluid under pressure:
This subclass is indented under subclass 108. Subject matter wherein the vibratory device causes vibration of the material or of a portion of the chamber wall, the vibration of the device being caused by the flow of fluid under pressure within the device.

Including shaft with radially movable element:
This subclass is indented under subclass 124. Subject matter wherein the vibratory device comprises a shaft, a cylindrical housing for the shaft, and a radially movable element (e.g., blade, vane, ball, pin) on said shaft, the fluid acting on the element or the housing to cause eccentric rotation of the shaft or orbital movement of the housing relative to the shaft and thus causing vibration of the housing.

Fluid acting on orbital rolling ball:
This subclass is indented under subclass 124. Subject matter wherein the vibratory device comprises a sphere guided for rolling movement along a generally circular or elliptical
path by pressure of the fluid thereagainst, the movement of the sphere causing the vibration of the device.

SEE OR SEARCH THIS CLASS, SUBCLASS:
125 for a device wherein a ball is movable radially with respect to a shaft within a cylindrical housing.

By electrostrictive or magnetostrictive transducer:
This subclass is indented under subclass 108. Subject matter wherein the vibration is caused by periodic deformation of a dielectric body as the result of an applied electric or magnetic field.

By rotary movement of unbalanced-weight shaft:
This subclass is indented under subclass 108. Subject matter wherein the vibration of the device is caused by movement of an unbalanced weight which is mounted eccentrically on a rotatable shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:
120 for a similar device of the pencil type.

OPERATOR SUPPORTED:
This subclass is indented under the class definition. Apparatus and corresponding methods comprising a stirrer and/or mixing chamber which is entirely sustained against the force of gravity by the user during agitation.

SEE OR SEARCH THIS CLASS, SUBCLASS:
117 for an operator supported vibratory stirrer.

Mixing chamber type:
This subclass is indented under subclass 129. Subject matter wherein a mixing chamber is so held by the user.
(1) Note. Included in this subclass are patents for receptacles with internal deflector structure wherein the agitation is effected by manual manipulation of the receptacle as a whole by the user.

SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for an apparatus including a holder for a chamber and means to cause vibration of the holder to effect agitation of material in the chamber.
209 for apparatus including means to secure a chamber to a movable support and means to move the support to effect agitation of material in the chamber.

SEE OR SEARCH CLASS:
206, Special Receptacle or Package, 219 for a package of two or more separated materials which are adapted to be commingled within the package by manipulation of the package or a part thereof.
220, Receptacles, appropriate subclasses for receptacle without deflectors and which are disclosed to be manipulated for agitation.

HAVING INTERRELATED FEED AND DISCHARGE MEANS:
This subclass is indented under the class definition. Apparatus and corresponding methods including external means to convey or admit material into the mixing chamber and means to convey or release the material therefrom and wherein said means: (a) are interconnected by a duct or conveyor exteriorly of the chamber for returning discharge material to the chamber; (b) have a common control system for regulating movement of material into and out of the chamber. (c) have a single mechanism for moving the material into and out of the chamber, or (d) are specifically related to each other by their relative size.
(1) Note. The feed and discharge may be through a common opening.

SEE OR SEARCH THIS CLASS, SUBCLASS:
76.3 for a screw conveyor for feeding material into a rubber or heavy plastic working apparatus.
139 for a device including means to produce a partial vacuum in the mixing chamber which means may also serve to move material into and/or out of the chamber.

Including means to monitor or control operation:
This subclass is indented under subclass 131. Subject matter including a common control system for regulating movement of material into and out of the chamber, and also including a detector for sensing a variable condition of the apparatus or of the material and initiating or modifying operation of a part of the apparatus in response to signal from the detector.

SEE OR SEARCH THIS CLASS, SUBCLASS:
151.1 for an apparatus wherein the feed means is responsive to a condition-sensor.

By single endless or screw conveyor:
This subclass is indented under subclass 131. Subject matter wherein a single endless or screw conveyor serves to either move material into and out of the chamber or to return discharged material to the mixing chamber.

Plural feed or discharge means:
This subclass is indented under subclass 131. Subject matter wherein