US PATENT SUBCLASS 91 / 170 R
RELATIVELY MOVABLE WORKING MEMBERS WITH ONE HAVING MOTIVE FLUID CONTROLLED BY, MOVABLY INTERCONNECTED WITH OR MOVED BY ANOTHER

Current as of: June, 1999
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91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

170 RRELATIVELY MOVABLE WORKING MEMBERS WITH ONE HAVING MOTIVE FLUID CONTROLLED BY, MOVABLY INTERCONNECTED WITH OR MOVED BY ANOTHER {12}
171  DF  .~> Synchronizing in response to sensed difference in positions
172  DF  .~> One working member oppositely biased by another
173  DF  .~> One working member forms movable chamber for another
174  DF  .~> With connection to relatively movable output member disposed between spaced unitary end faces
176  DF  .~> Moving cylinders
177  DF  .~> Oscillating working members
178  DF  .~> Single valve unit controlling plural working chambers {2}
181  DF  .~> Interconnected working members in communicating chamber portions
182  DF  .~> Means connecting working members actuates common part controlling motive fluid for the members
183  DF  .~> With means interconnecting working members to cause relative motion {5}
189 R  DF  .~> Position of one working member controls motive fluid for another {3}
170 MP  DF  .~> Mine props

Unofficial Alpha Subclasses: R MP

DEFINITION

Classification: 91/170

(under the class definition) Apparatus having plural working members which are capable of relative movement and in which there is either (1) control of motive fluid for one working member in response to the position of another; (2) an interconnection between the members to cause relative motion or (3) an interconnection between said members (such as a "lost motion" or separable abutment connection) which causes one member to move the other member under some disclosed operating condition but which permits relative motion of the members.

(1) Note. See the class definition for the definition of the term working member. A plurality of working member faces are not considered to be relatively movable merely because each is made up of constituent areas which are relatively movable. For example, a pair of diaphragms fixed to a single rigid output rod are not considered to have relative movement when flexed, but a pair of diaphragms connected to separate shafts which have relative movement when the diaphragms are flexed are considered to be relatively movable.

(2) Note. The working members must produce power for external use. A piston or the like which operates only a valve of the motor or a motor latch, etc. is not considered to be a working member under this definition. See, for example, subclasses 304+. However, one working member may transmit its power output through another.

(3) Note. The control of working fluid for one working member by another may be such that: (a) one member controls another only; (b) each of several members controls another or (c) the connected output of all of the working members actuates means to control some or all of them.

(4) Note. Included under this definition are patents claiming a first working chamber having a working member which extends into a second working chamber to engage or abut a second working member therein to move the latter. However, if the first working member is disclosed as merely displacing fluid in the second chamber and thus moves the second working member without engaging it, the patent has been construed as a pulsator and classified in an appropriate subclass of Class 60.

(5) Note. For classification as an original under this definition a patent must claim either features (1), (2), or (3) of the definition. (6) Note. Means to actuate a valve may be part of the motive fluid control in part 1 of this definition but a means to merely prevent or permit actuation of the valve by some other agency has not been considered motive fluid control.

SEE OR SEARCH THIS CLASS, SUBCLASS:

411+, for more residual relations between plural working members including (1) those continuously connected to move as a unit (2) those which have unrelated or independent outputs and wherein one is not controlled in response to position of another (3) those in which one member is controlled in response to some condition or criteria of the other than its position and (4) control of supply of working fluid to plural working chambers regardless of the relation between their outputs and including plural working members which are relatively moved by transmissions which are disclosed but not claimed.

472+, for motors having three or more cylinders arranged in parallel, radial, or conical relationship with a rotary transmission axis.

SEE OR SEARCH CLASS

60, Power Plants,

426, for a system of plural motors combined with a pressure fluid source in which the speed of, pressure in or position of one output motor or motor section controls another.

92, Expansible Chamber Devices,

61+, for expansible chamber devices having relatively movable working members.

185, Motors: Spring, Weight, or Animal Powered,

2+, for combined motors of that class.

416, Fluid Reaction Surfaces (i.e., Impellers), 120+, for plural impellers reacting with an undirected or unconfined medium fluid flow.