US PATENT SUBCLASS 91 / 478
.~.~ Means varies cyclic relation between reciprocating member and control valve therefor

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

472  DF  THREE OR MORE CYLINDERS ARRANGED IN PARALLEL RADIAL OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS {10}
476  DF  .~ Separate motive fluid control for each working chamber {4}
478.~.~ Means varies cyclic relation between reciprocating member and control valve therefor

DEFINITION

Classification: 91/478

(under subclass 476) Apparatus in which there is provided means for enabling the selective adjustment of the time of occurrence of admission or discharge of motive fluid to or from at least one of said plural working chambers relative to the reciprocatory movement cycle of the relatively reciprocating piston and cylinder forming said chamber.