Four-wheel drive tractor

Details Four-wheel drive tractor Four-wheel drive tractor

1990-09-12

1991-06-04

Hill, Mitchell J.

Motor vehicles

Having four wheels driven

With means for steering all driven wheels

180163, 180242, 180900, 280 91, 280 951, B62D 500, B62D 700

Patent

active

050206273

ABSTRACT:
A highly maneuverable four-wheel drive, four-wheel steer tractor is provided with hydraulic motors mounted at each wheel to drive the wheels. Each wheel and associated hydraulic motor is pivotable relative to the frame of the tractor. Steering is accomplished at all four wheels simultaneously by use of a hydraulic piston which rotates a longitudinal bar suspended under the frame. The elongated bar drives tie rods to the wheel and motor assemblies to cause steering deflection. The front wheels steer oppositely to the rear wheels to reduce the turning radius of the tractor.

REFERENCES:
patent: 2357742 (1944-09-01), Jeffrey
patent: 3236324 (1966-02-01), Levratto
patent: 3351147 (1967-11-01), Williamson
patent: 3596730 (1971-08-01), Cecce
patent: 3727938 (1973-04-01), Goodbary et al.
patent: 4446941 (1984-05-01), Laurich-Trost

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