US PATENT SUBCLASS 91 / 226
.~.~ Communication into piston through peripheral port

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}
226.~.~ Communication into piston through peripheral port {1}
227  DF  .~.~.~> Port controlled by piston position

DEFINITION

Classification: 91/226

(under subclass 222) Apparatus in which the inlet or exhaust of motive fluid is through a port in the side wall of the working chamber which communicates with the distributor controlled passage which opens through the side of the piston.