US PATENT SUBCLASS 91 / 193
.~.~.~ Fluid operated valve controlled by relatively movable working member

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

170 R  DF  RELATIVELY MOVABLE WORKING MEMBERS WITH ONE HAVING MOTIVE FLUID CONTROLLED BY, MOVABLY INTERCONNECTED WITH OR MOVED BY ANOTHER {12}
189 R  DF  .~ Position of one working member controls motive fluid for another {3}
191  DF  .~.~ Each cyclically controls another (e.g., duplex) {4}
193.~.~.~ Fluid operated valve controlled by relatively movable working member

DEFINITION

Classification: 91/193

(under subclass 191) Apparatus having a valve controlling motive fluid flow to or from at least one of plural working members, fluid operated means to move the valve, and means to control the supply of fluid to said valve moving means in response to the position of another relatively movable working member.