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:
Oct. 19, 1976
Filed:
May. 01, 1975
David William Stubben, Dubuque, IA (US);
Deere & Company, Moline, IL (US);
Abstract
A motor grader includes a blade support frame in the form of a drawbar located beneath and having its forward end universally pivotally connected to an arched beam forming a fore-and-aft extending main frame section of the grader. The drawbar is further connected to the arched beam through means of a suspension and control linkage including a pair of bell cranks pivotally connected at opposite sides of the beam for movement about respective fore-and-aft axes. A transverse bar extends beneath the beam and has opposite ends thereof respectively pivotally connected to respective first arms of the bell cranks. A pair of two-way hydraulic lift actuators respectively have first ends pivotally connected to respective second arms of the bell crank and respectively have second ends pivotally connected to opposite side of the drawbar. A side-shift actuator extends beneath the beams and has its opposite ends respectively pivotally connected to one side of the drawbar and the bell crank which is the most remote therefrom. A hydraulically operable locking pin is fixed to the beam adjacent the transverse bar and the latter is provided along its length with a plurality of holes for selective reception of the locking pin to fix the blade support frame in a desired position. For the same purpose, further holes are located in the bell cranks. Provision is made for pressure engagement and disengagement of the locking pin.