US PATENT SUBCLASS 91 / 434
.~.~ With manual valve actuating means responsive to motive fluid pressure (e.g., "feel")

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

418  DF  WITH MOTIVE FLUID VALVE {32}
433  DF  .~ Both inlet and exhaust controlled by motive fluid pressure in supply line or chamber {1}
434.~.~ With manual valve actuating means responsive to motive fluid pressure (e.g., "feel")

DEFINITION

Classification: 91/434

(under subclass 433) Apparatus in which the valve means is provided with manual actuating means, the variations in pressure being applied to said manual actuating means to provide a reaction or "feel" to the operator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

370+, for expansible chamber motors having follower type valve means with motor chamber pressure reaction on the valve.