Deere & Company

David William Stubben

Dennis A Brimeyer

Martin Lavern Ruhter

Alfred Sigmund Smemo

Glenn Owen Scheer

William Daniel Robinson

Allan F Loney

Judson Paul Clark

Gladys L Evans

William Michael Walter

Judson P Clark

Alfred Signmund Smemo

A dual path hydrostatic drive system having an electronic auxiliary drive auxiliary drive controller controlling the hydraulic output of left and right variable displacement pumps in response to the speed of the main drive wheels and a speed ratio signal from a speed ratio input control. In addition, the auxiliary drive auxiliary drive controller controls the outputs of the pumps within three basic boundary conditions; a hydraulic pressure boundary condition, a motor speed boundary condition and a power boundary condition. A clutch mode activation switch has two positions for signaling the auxiliary drive auxiliary drive controller to operate in a first mode in which the auxiliary drive system is shut down upon activation of the main clutch or a second mode where the auxiliary drive controller attempts to mirror the operation of the main drive wheels.

Hydrostatic auxiliary drive system

A mounting frame for a moldboard of a motor grader is provided with first and second retainers having V-shaped notches that cooperate with V-shaped engagement portion located on the mounting rails of the moldboard. Each of the V-shaped notches are provided with first and second wear strips defining the wings of the V-shaped notch. The wear strips have a sliding surface in sliding contact with the mounting rails and a contact surface which contacts the adjoining wear strip in the V-shaped notch. Locating protuberances are located at each end of the wear strips and cooperate with retainer clips to hold the wear strips in proper position. The ends of the wear strips are also provided with abutment surfaces which contact the base of the retainer clips.

Mounting assembly for a grader moldboard

A main frame construction for a motor grader wherein the main frame comprises a rear unit, a center unit, and a front unit. Both rear and center units are box-like structures in cross sections with constant transverse dimensions, with constant metal specification, with continuous welds at all four corners running longitudinally of each unit, with but one weld junction at a location spaced rearwardly of the knee area supporting a saddle structure for the blade, and without the provision of extra structural members and arrangements at the knee area. Minimum section changes within the box structures of the rear and center units, the elimination of weld starts and stops provides a strong smooth section of main frame alleviating locally high stresses at the knee area for mounting the saddle. The very simplicity of the rear and center unit box-structure as described and depicted is the heart of the improved main frame. Further, the provision of weld spaced at each corner of the box frames, with a pair of weld spaces on each side thereof enables continuous and simultaneous welding of each pair of side weld spaces by a one pass process.

Motor grader main frame

A saddle construction for use in a motor grader having a fore-and-aft extending main frame comprising an upper portion having a generally longitudinal extending section forming a forward facing and a rear facing. The facings have a generally vertical orientation. The main frame has first and second pins slidably mounted transversely in the main frame in longitudinal spaced apart relationship. The forward facing of the saddle upper portion straddles the main frame and is fixably mounted to opposite ends of the first pin. In like manner, the rear facing straddles the main frame and is fixably mounted to opposite ends of the second pin. The saddle further includes a lower portion straddling the main frame and fixably mounted the rear facing. The main frame has a plurality of recesses formed in respective side walls of the main frame in longitudinal spaced apart relationship for seatably receiving inwardly directed landings formed on the facings.

Motor grader with saddle mounted to transverse pin on main frame

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.

Growing community of inventors

Dubuque, IA, United States of America

David William Stubben