US PATENT SUBCLASS 91 / 192
.~.~.~ With three or more working members

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}
192.~.~.~ With three or more working members

DEFINITION

Classification: 91/192

(under subclass 191) Apparatus having at least three working members, at least two of which are controlled by valve means actuated by a different working member than the working member controlled thereby.