US PATENT SUBCLASS 172 / 260
.~ With actuator for moving earth working element vertically

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

256  DF  PROPULSION UNIT GUIDED BY WALKING ATTENDANT OR PART OF ARTICULATED VEHICLE {4}
260.~ With actuator for moving earth working element vertically

DEFINITION

Classification: 172/260

(under subclass 256) Apparatus having an actuator for causing an earth working element to move vertically with respect to its supporting frame.

(1) Note. For the meaning of "actuator" see the class definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

257, for apparatus in which there is an unstable propulsion unit vertically pivotally connected to another section with a riding attendant and there is also a means for causing an earth working element to move vertically.