US PATENT SUBCLASS 91 / 527
.~.~ Valve controlled by remote means (e.g., radio, electromagnetic, etc.)

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}
525  DF  .~ With means to control the working fluid to one working member for movement relative to another without controlling the working fluid to the other working member by said means {4}
527.~.~ Valve controlled by remote means (e.g., radio, electromagnetic, etc.)

DEFINITION

Classification: 91/527

Valve controlled by remote means (e.g., radio, electromagnetic, etc.):

(under subclass 525) Apparatus wherein the control means is controlled by a remotely controlled device.

(1) Note. "Remote control" as used in this subclass includes means in addition to a pilot valve such as a radio controlled means controlling the fluid for operating the fluid pressure operated valve.

(2) Note. Other remote control devices include electromagnetic means, light sensitive means, sound or temperature sensitive means dedicated pump-motor systems (pulsator), etc.