(under subclass 734) Apparatus in which the earth working element is selectively adjustable so as to vary the vertical distance between the frame and the element.
(1) Note. For the meaning of "adjustable" see the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
452+, for actuating means for lifting a tool for transport on a wheel frame.
668, for tools vertically adjustable with respect to wheel frame by means of an actuator.
675, for tools vertically adjustable with respect to a wheel frame.
