(under subclass 452) Apparatus in which the connection between the actuator and earth working element is such as to allow at least a certain amount of free vertical movement between the two in at least one direction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
117, for driven earth working elements which are free to move bodily at least a limited amount relative to a supporting frame on which they are mounted.
414, for apparatus including a vertically adjustable ground support for a tool frame including a flexible or lost motion connection between the ground support and the actuator.
449, for apparatus with a mast-type hitch in which the tool is movable relative to the mast while earth working.
