(under subclass 439) Apparatus in which in addition to an actuator for swinging the struts which is adapted to lift the earth working device for transport there is an added means for holding an earth working element in different positions in a vertical sense with respect to the propelling means.
(1) Note. For the definition of "actuator" see the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
446, for tools associated with a mast-type hitch adjusted vertically as well as laterally.
474+, for tools which are liftable for transport on a wheeled frame which are rockable about an independently, vertically adjustable transverse axis.
485+, for apparatus comprising a power unit for lifting tools for transport on a wheeled frame and manual means for effecting a supplemental adjustment.
