US PATENT SUBCLASS 172 / 428
.~.~.~ Rack and pinion or ratchet type

Current as of: June, 1999
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172 /   HD   EARTH WORKING

395  DF  WITH GROUND SUPPORT VERTICALLY ADJUSTABLE RELATIVE TO FRAME {10}
423  DF  .~ With actuator {3}
425  DF  .~.~ Gearing {3}
428.~.~.~ Rack and pinion or ratchet type

DEFINITION

Classification: 172/428

(under subclass 425) Apparatus in which the gearing includes a rack member meshing with a gear or engageable by a ratchet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

420, for a rack and pinion or ratchet-type actuator for a ground support having a translating motion.

SEE OR SEARCH CLASS

280, Land Vehicles,

43.21, for vehicles having supporting wheels which are moved vertically relative to the vehicle frame by a rack and pinion or ratchet-actuating means.