US PATENT SUBCLASS 91 / 247
.~ Timing control by relative adjustment of plural movable fluid control elements

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

218  DF  CYCLICALLY OPERABLE {34}
247.~ Timing control by relative adjustment of plural movable fluid control elements {3}
248  DF  .~.~> Electrical adjustment
249  DF  .~.~> With relative adjustment of plural adjustable fluid control elements {1}
252  DF  .~.~> Cut off adjustable relative to admission {4}

DEFINITION

Classification: 91/247

(under subclass 218) Apparatus in which an expansible chamber is provided with a distributor having (1) a plurality of fluid control elements each of which move to cyclically control the flow of motive fluid and which, in addition to such control movement, are relatively adjustable so as to vary the time of occurrence of a fluid control event with respect to the movement cycle of the motor working member, and with respect to the occurrence of another fluid control event, or (2) a relatively fixed, but adjustable, fluid

control element which cooperates with a moving fluid control element to cyclically produce one or more but not all of the fluid control events, and is adjusted so as to vary the time of occurrence of a fluid control event produced by the cooperation of the relatively fixed and moving fluid control elements, with respect to the movement cycle of the motor working member and with respect to the occurrence of another fluid control event.

(1) Note. A fluid control event is the occurrence of starting or stopping the flow of motive fluid to or from a working chamber of the motor. Inlet of motive fluid is started by the occurrence of the "admission" event and is stopped by the occurrence of the "cut off" event. Exhaust of motive fluid is started by the occurrence of the "release" event and is stopped by the occurrence of the "compression" event.

SEE OR SEARCH THIS CLASS, SUBCLASS:

187, for expansible chamber motors having adjustable means to change the timing of control events for plural relatively movable working members.

246, for cyclically operable expansible chamber motors having means to adjust the distributor for varying the cyclic control of motive fluid, the operation of said means being correlated with movement of a throttle valve.