US PATENT SUBCLASS 91 / 233
.~.~ Distribution by reciprocating working member moving about an axis

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

218  DF  CYCLICALLY OPERABLE {34}
232  DF  .~ Valveless distribution {2}
233.~.~ Distribution by reciprocating working member moving about an axis

DEFINITION

Classification: 91/233

(under subclass 232) Apparatus in which the motor is of the reciprocating type and means are provided to rotate or oscillate the working member about its own axis incident to reciprocation, the opening and closing of fluid flow paths being accomplished as a result of movement of the working member about its axis.