The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 09, 1988
Filed:
Sep. 24, 1986
Emmett G Webster, New Holland, PA (US);
Edmund O Howell, New Holland, PA (US);
Robert A Wagstaff, Lancaster, PA (US);
New Holland Inc., New Holland, PA (US);
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.