US PATENT SUBCLASS 91 / 224
.~.~ Distributor establishes communication between opposite faces of piston

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

218  DF  CYCLICALLY OPERABLE {34}
222  DF  .~ Distributor in piston (422) {6}
224.~.~ Distributor establishes communication between opposite faces of piston

DEFINITION

Classification: 91/224

(under subclass 222) Apparatus in which the distributor controls a passage in the piston which is adapted to convey fluid through a working face of the piston to a face which is axially opposed.