US PATENT SUBCLASS 91 / 297
.~.~.~ With passage for pilot fluid in working member

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

218  DF  CYCLICALLY OPERABLE {34}
281  DF  .~ Working member controlled motive fluid for distributor motor {12}
290  DF  .~.~ Working member traverses pilot port in working chamber side wall {9}
297.~.~.~ With passage for pilot fluid in working member {1}
298  DF  .~.~.~.~> Working member passage supplies distributor motive fluid

DEFINITION

Classification: 91/297

(under subclass 290) Apparatus in which the output motor working member is provided with a passage to convey fluid to or from the distributor motor working chamber.

(1) Note. The passage in the working member is not necessarily entirely within the working member but may be formed by cooperation with the working chamber wall.

(2) Note. The passage in the working member need not necessarily communicate with the pilot port in the output motor working chamber side wall.