US PATENT SUBCLASS 91 / 482
.~ 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}
482.~ Means varies cyclic relation between reciprocating member and control valve therefor {1}
483  DF  .~.~> By adjustment of transmission or reaction element

DEFINITION

Classification: 91/482

(under subclass 472) Apparatus having valve means for controlling the admission or discharge of motive fluid to or from said plural working chambers, there being provided means for enabling the selective adjustment of the time of occurrence of admission or discharge of fluid to or from at least one of said plural working chambers relative to the reciprocating movement cycle of the relatively recipro- cating piston and cylinder forming said chamber.

(1) Note. The mere varying of the length of stroke or displacement of the device in the absence of a disclosure of valve timing control is excluded under this definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

6.5, for three or more radial or parallel cylinders having means for supplying motive fluid thereto vial diverse flow paths.

478, for means for adjusting the time of occurrence of admission and discharge of motive fluid in devices having a separate valve for each expansible chamber.