US PATENT SUBCLASS 91 / 523
.~.~ Simultaneously actuated separate valve means

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

508  DF  PLURAL RELATIVELY MOVABLE OR RIGIDLY INTERCONNECTED WORKING MEMBERS {11}
521  DF  .~ Separate valve means actuatable by a common nonmanual actuator or separately actuatable means with common manual actuator {3}
523.~.~ Simultaneously actuated separate valve means

DEFINITION

Classification: 91/523

Simultaneously actuated separate valve means:

(under subclass 521) Apparatus wherein the separate valve means may be activated simultaneously.

(1) Note. See subclass 536 for device having relatively movable working members controlled by a single valve means.