US PATENT SUBCLASS 91 / 479
.~.~ Control by moving cylinder or liner

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}
479.~.~ Control by moving cylinder or liner

DEFINITION

Classification: 91/479

(under subclass 476) Apparatus in which, incident to the operation of the device, the cylinders also have absolute individual movement (e.g., rocking), the individual movement of the cylinders controlling porting to control the flow of motive fluid to or from the working chambers.

(1) Note. Under this definition the term cylinder includes merely a liner which has individual motion to control the motive fluid without movement of the cylinder head.