US PATENT SUBCLASS 91 / 392
WORKING MEMBER POSITION RESPONSIVE MOTIVE FLUID CONTROL

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

392WORKING MEMBER POSITION RESPONSIVE MOTIVE FLUID CONTROL {9}
393  DF  .~> Position initiated timing or delay means
394  DF  .~> Working member carries part within working chamber which controls port in chamber end wall {2}
397  DF  .~> Alternate control of inlet and exhaust for same chamber at opposite ends of stroke
398  DF  .~> Simultaneous control of inlet and exhaust of same chamber
399  DF  .~> Bypassing between expanding chamber and closed or throttled contracting chamber (e.g., cushioning) (23)
400  DF  .~> Venting expanding chamber {2}
403  DF  .~> Position controls actuating fluid for valve
404  DF  .~> Exhaust control {2}
410  DF  .~> Working member controls relatively movable inlet valve

DEFINITION

Classification: 91/392

(under the class definition) Apparatus in which the flow of motive fluid to or from a working chamber or within a working chamber is modified so as to alter the motor operation in response to the working member of the motor attaining a given position in the working chamber.

(1) Note. Motors in which a control is effected by a motive fluid pressure change due merely to the working member reaching the end of the stroke or engaging a stop or the like are not considered to be position responsive under this definition.

(2) Note. This definition includes those motors in which the motive fluid is controlled in response to means which senses or measures the quantity or volume of fluid (as opposed to rate of flow or pressure) which flows to or from a chamber which expands or contracts proportionally to the motor movement. The chamber may be a working or nonworking chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

20+, for expansible chamber motors in which motive fluid is supplied to a single working chamber through different supply paths at different times, at least one of said supply paths being controlled in response to the position of the motor working member.

58+, for rotary expansible chamber motors in which the motive fluid is controlled in response to the position of the rotary working member of the motor.

168, for expansible chamber motors in which the motor has separately controlled working chambers, the extension of the unit equalling the sum of the individual chamber extensions and in which the position of one working member controls the motive fluid for another working member.

170+, and especially subclasses 189+ for expansible chamber motors having plural relatively movable working members in which the motive fluid for one working member is controlled in response to the position of another working member.

218+, for expansible chamber motors having a reciprocating cycle of operation and means operating in response to the position of the working member to control the motive fluid to cause the motor to operate continuously repeating the cycle.

357, for expansible chamber motors having selectively usable or positionable working member controlled vent in the working chamber wall.

358+, for expansible chamber motors having valve means which is operated by an input signal to cause operation of the motor and in which said valve means is further controlled in response to the working member of the motor attaining a given position.

419, for expansible chamber motors in which a motive fluid valve is controlled in response to the position or orientation of the entire motor.

425, for expansible chamber motors in which in response to position of the working member means are actuated to hold a valve in a given position.