(under subclass 439) Apparatus in which (1) an earth working element is free to move laterally to the line of draft relative to the propelling means while performing its earth working function or (2) there are means in addition to merely the struts and their connections with the mast and propelling
means for preventing or inhibiting free movement of the earth working element laterally of the line of draft relative to the propelling means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
449, for tools freely movable relative to the mast of a mast-type hitch while earth working.
457, for tools liftable on a wheeled frame by means other than a mast-type hitch and means to restrain sway when raised.
501+, for tools liftable on a wheeled frame by an actuator and with a lost motion connection between the actuator and the tool.
SEE OR SEARCH CLASS 280, Land Vehicles,
497, for a trailer having an articulated connection to a draft element having vertically spaced connections to a tractor.
