US PATENT SUBCLASS 172 / 419-- .~.~.~ Screw jack type

US PATENT SUBCLASS 172 / 419
.~.~.~ Screw jack 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}
415	DF	.~ Translating motion {3}
418	DF	.~.~ With actuator {2}
419		.~.~.~ Screw jack type

DEFINITION

Classification: 172/419

(under subclass 418) Apparatus in which the actuator comprises a pair of relatively movable threaded members.

SEE OR SEARCH THIS CLASS, SUBCLASS:

427, for screw-jack type actuators for vertically adjustable ground supports.

504, for screw-type actuators for lifting tools for transport on a wheeled frame.

SEE OR SEARCH CLASS

280, Land Vehicles,

43.2, for vehicles having supporting wheels which are moved vertically relative to the vehicle frame by a screw-jack type actuating means.