Steerable wheel assembly for unitized rakes

Details Steerable wheel assembly for unitized rakes Steerable wheel assembly for unitized rakes

A - Human Necessities

01

D

56/167

A01D 80/00 (2006.01) A01D 78/00 (2006.01) A01D 78/14 (2006.01)

Patent

CA 1289754

STEERABLE WHEEL ASSEMBLY FOR UNITIZED RAKES ABSTRACT OF THE DISCLOSURE A unitized raking implement having pivotably movable frame arms supported by ground engaging wheels is disclosed wherein a four-bar linkage is used to control the orientation of the wheels between an orientation parallel to the direction of travel of the implement and a non-parallel orientation. The rotation of the wheels into a non-parallel orientation permits the frame arms to be pivotally moved relative to the implement frame upon a corresponding movement of the raking implement. The control linkage includes a control link having a hydraulic cylinder operable to affect an extension of the length of the control link and, thereby, to affect a steering of the wheel between parallel and non-parallel orientations. The four-bar linkage permits the wheels to be returned into the parallel orientation whenever the hydraulic cylinder is fully retracted irrespective of the pivoted position of the respective frame arms.

545120

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