US PATENT SUBCLASS 172 / 668
.~ For vertical adjustment with respect to wheeled frame


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

663  DF  WITH ACTUATOR {4}
668.~ For vertical adjustment with respect to wheeled frame


DEFINITION

Classification: 172/668

(under subclass 663) Apparatus comprising a wheel carrying frame, an implement connected thereto and an actuator for vertically positioning the implement or some part rigid therewith with respect to the wheeled frame.

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

452, for similar devices in which the actuator is also capable of lifting the implement entirely off the ground for transport on the wheeled frame.

675, for vertically adjustable tools mounted on a wheeled frame.

SEE OR SEARCH CLASS

171, Unearthing Plants or Buried Objects, 141, for an actuator for lifting or tilting an unearthing apparatus.