Deere & Company

James Allan Koch

Carl E Kittle

Benjamin Michael Witte

Richard Treichel

Robert L Rigdon, Sr

John J Freund

Lynn E Porter

Gary J Stratton

Michael D Wagner

A removable wheel tread adjusting device used for facilitating the axial displacement of a tractor wheel assembly is adaptable to the exterior surface of the wheel assembly and can be utilized for the same task on similar wheel assembly structures. Specifically, the removable adjusting device supports a gear which intermeshes with a rack extending lengthwise along the axle and is capable of receiving torque from a tool so as to effect the axial displacement of the wheel assembly relative to the axle.

Removable wheel tread adjusting device

The lower draft link of a tractor three-point hitch includes a sensor to sense draft loads imposed on the draft link by an earth-working implement. Variations in the draft load cause variations in the pressure of the fluid in the sensor from a preselected pressure. A pilot-operated, load control valve is connected to the sensor and is shiftable in response to pressure above and below the preselected pressure to actuate a control mechanism. The control mechanism actuates a direction control valve for directing fluid to and from a hydraulic lift cylinder for respectively raising and lowering the draft link to adjust the implement so as to maintain the preselected pressure and thus maintain the desired draft load.

Tractor with hydraulic draft control

Growing community of inventors

Hudson, IA, United States of America

James Allan Koch