US PATENT SUBCLASS 91 / 476
.~ Separate motive fluid control for each working chamber

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.~ Separate motive fluid control for each working chamber {4}
477  DF  .~.~> Each piston acts as valve for different working chamber
478  DF  .~.~> Means varies cyclic relation between reciprocating member and control valve therefor
479  DF  .~.~> Control by moving cylinder or liner
480  DF  .~.~> Mechanically actuated valves {1}

DEFINITION

Classification: 91/476

(under subclass 472) Apparatus in which there is provided individual valve means for each for said working chambers to cyclically control the flow of motive fluid to or from the chamber, each of said valve means being movable relative to another and each controlling the motive fluid for a single chamber without effecting motive fluid control for any other chamber.

(1) Note. The valve means may comprise a separate valve movable with respect to both the piston and cylinder (i.e., distributor) or may comprise, for example, a part in the cylinder wall controlled by the piston (e.g., "valveless" or "semi-valveless").