US PATENT SUBCLASS 91 / 480
.~.~ Mechanically actuated valves

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}
480.~.~ Mechanically actuated valves {1}
481  DF  .~.~.~> Radial cylinders

DEFINITION

Classification: 91/480

(under subclass 476) Apparatus in which the individual valve means comprises a valve movable with respect to both the cylinder and relatively reciprocating piston therein, said valve being cyclically shifted by mechanical means incident to the operation of the device.