US PATENT SUBCLASS 180 / 420
.~.~.~ Reciprocating power assist

Current as of: June, 1999
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180 /   HD   MOTOR VEHICLES

400  DF  STEERING GEAR {8}
417  DF  .~ With fluid power assist {16}
418  DF  .~.~ Between articulated wheeled vehicle sections {2}
420.~.~.~ Reciprocating power assist

DEFINITION

Classification: 180/420

Reciprocating power assist:

(under subclass 418) Subject matter wherein the means movable by the application of pressurized fluid comprises an expansible chamber motive means, the relatively movable parts thereof being movable in a straight line.