US PATENT SUBCLASS 91 / 304
.~.~ Pilot valve controlled distributor motor (461)

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

218  DF  CYCLICALLY OPERABLE {34}
281  DF  .~ Working member controlled motive fluid for distributor motor {12}
304.~.~ Pilot valve controlled distributor motor (461) {9}
305  DF  .~.~.~> Plural pilot valves {1}
307  DF  .~.~.~> Pilot valve relieves constantly supplied distributor motor fluid
308  DF  .~.~.~> Fluid-operated pilot valve
309  DF  .~.~.~> With distributor motor reversal by constantly applied fluid pressure
310  DF  .~.~.~> Pilot valve moves about an axis
311  DF  .~.~.~> Pilot valve moves laterally relative to working member reciprocatory path
312  DF  .~.~.~> Distributor motor working member is valve seat for pilot valve
313  DF  .~.~.~> Pilot valve actuator extends into working chamber
314  DF  .~.~.~> Working member reverses pilot through part movable relative to both

DEFINITION

Classification: 91/304

(under subclass 281) Apparatus in which a fluid passage is controlled by a relatively movable valve in response to movement of the output motor working member to a predetermined position to cyclically connect the distributor motor working chamber to exhaust or motive fluid supply.

SEE OR SEARCH THIS CLASS, SUBCLASS:

290+, for a cyclically operable motor in which the working member traverses a pilot port in the working chamber side wall to control motive fluid supply for a distributor motor, and particularly subclasses 291+ for a motor in which the pilot port controls a separate motor for an intermediate pilot valve and subclasses 293+ for a motor in which the passage from the port is controlled by a pilot valve.

461, for pilot valves for motors of the noncyclically operable type.