Raising and lowering mechanism for farm implement

Details Raising and lowering mechanism for farm implement Raising and lowering mechanism for farm implement

A - Human Necessities

01

B

56/45

A01B 63/22 (2006.01)

Patent

CA 1145955

RAISING AND LOWERING MECHANISM FOR FARM IMPLEMENT Abstract of the Disclosure A tractor-drawn farm implement is carried at its front end on a tractor drawbar and at its rear end by trailing wheel means, and linkage of the so-called four-bar type is operative to selec- tively raise and lower the implement. The body of the implement serves as one member of the linkage and front and rear lever arms are interconnected by a leveling rod so as to coordinate the front and rear arms as force is exerted against one arm by power- operated means on the implement. During one phase of vertical movement of the implement as it is raised or lowered, the leveling rod is stressed in compression. The invention provides yieldable means in conjunction with the rod capable of yielding as to prevent or at least minimize bending of the rod in the event of over-stressing.

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