US PATENT SUBCLASS 91 / 231
.~.~ One working member supply is distributor controlled

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

218  DF  CYCLICALLY OPERABLE {34}
230  DF  .~ Codirectional separately supplied working members {1}
231.~.~ One working member supply is distributor controlled

DEFINITION

Classification: 91/231

(under subclass 230) Apparatus in which one of the plural working members acting in the same direction is controlled by a distributor.