Steerable wheel assembly for unitized rakes

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

1986-09-24

1988-02-09

Hirsch, Paul J.

Harvesters

Horse rakes

Side delivery

56 155, A01D 8000, A01D 7814

Patent

active

047234016

ABSTRACT:
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.

REFERENCES:
patent: 3490555 (1970-01-01), Noack
patent: 3568423 (1971-03-01), Hale et al.
patent: 3893283 (1975-07-01), Dandl
patent: 4040490 (1977-08-01), Anderson
patent: 4166353 (1979-09-01), Garrison et al.
patent: 4343142 (1982-08-01), Allen
patent: 4367621 (1983-01-01), Swetnam et al.
patent: 4552375 (1985-11-01), Kinzenbaw
patent: 4555897 (1985-12-01), Degelman

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