US PATENT SUBCLASS 172 / 504
.~ Screw actuator

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

452  DF  WITH ACTUATOR ADAPTED TO LIFT TOOL FOR TRANSPORT ON WHEELED FRAME OR BROADLY CLAIMED IMPLEMENT {37}
504.~ Screw actuator

DEFINITION

Classification: 172/504

(under subclass 452) Apparatus in which the actuator includes a pair of relatively movable threaded members.

SEE OR SEARCH THIS CLASS, SUBCLASS:

419, for ground supports which are moved with a vertical translating motion relative to a frame by a screw-jack type actuator.

427, for ground supports which are moved vertically relative to a frame by a screw-jack type actuator.