(under subclass 35) Apparatus in which the driven earth working element is so mounted on a supporting frame that during normal operation said earth working element can (1) move freely relative to said frame, or (2) can move against the action of a biasing member which generally urges said earth working element into a predetermined position.
(1) Note. This definition includes lateral as well as vertical movement, and the tool need not be capable of universal movement but such tool may move in a guide way or the like even though the amplitude of the movement may be limited by stop means.
(2) Note. The movement of the tool relative to the frame as contemplated by this definition is a shifting or movement of the tool from one position to another in the frame, which movement is above and beyond the motion of the tool as it is driven through its path or orbit. Such shifting or movement may be either a translation of the tool as a unit or simply a pivotal movement of the tool about a fixed axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
77, for a driven implement having a ground support and being jointedly connected to a vehicle there being additionally provided a resilient means for normally biasing the implement in a vertical plane.
96, for teeth or like earth working parts or portions which are yieldably mounted on a power driven carrier for motion with respect thereto.
98+, for earth working elements which are provided with a means whereby an attendant can selectively vary the lateral position of said elements during normal operation. 497+, for an actuator adapted to lift a nondriven tool for transport on a wheeled vehicle, there being provided a resilient means for biasing the tool to a predetermined position but permitting the same to yield on overload or the like.
501+, for an actuator adapted to lift a nondriven tool for transport on a wheeled frame, there being provided a lost motion connection between the actuator and tool whereby during earth working said tool is free to move relative to said actuator or frame.
