US PATENT SUBCLASS 172 / 425
.~.~ Gearing

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.~.~ Gearing {3}
426  DF  .~.~.~> Worm gear
427  DF  .~.~.~> Screw jack type
428  DF  .~.~.~> Rack and pinion or ratchet type

DEFINITION

Classification: 172/425

(under subclass 423) Apparatus in which the actuator comprises gearing.

(1) Note. For the definition of gearing, see Class 74, Machine Element or Mechanism, subclass 640.