Agricultural tractors and other vehicles

Motor vehicles – Special wheel base – Five or more wheels

Patent

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Details

180 2402, 180 2407, 180265, 280111, B62D 6110

Patent

active

043112030

ABSTRACT:
A tractor has three pairs of ground wheels: a front steerable pair, a rear steerable pair and a central pair. The central pair of wheels each are fitted to the frame through a hydraulic piston assembly that can be controlled to raise those wheels above the ground or to lower the wheels to engage the ground. The central wheels can be the same as the other wheels or traction caged wheels of hollow beams wherein a hub is connected to outer fellies with spokes. Supports interconnect the fellies at the inner or outer sides. All of the wheels can be driven independently by an engine and the central wheels are each detachable from a driven axle. The hub of the central wheels includes an outer cylindrical sleeve to which an end plate and the spokes are affixed. Each wheel is mounted on a hydraulic motor which is mounted on the tractor's frame, the forward and rear motors being turnable with the wheels mounted thereon. A hydraulic jack connected to the motors of the central wheels is adapted to raise and lower same. Hydraulically actuated three-point lift devices are provided on the tractor frame to extend forward between the front two wheels and rearwardly between the two rear wheels. Front and rear power take-off shafts are also provided. Power is provided by an engine located between the axes of rotation of the front and central wheels to a hydraulic pump and thence separately to each of the hydraulic motors and the hydraulic actuated mechanisms.

REFERENCES:
patent: 408283 (1889-08-01), Baker
patent: 2393324 (1946-01-01), Joy
patent: 2544521 (1951-03-01), Bergen
patent: 2902289 (1959-09-01), North
patent: 3099460 (1963-07-01), Sheehan
patent: 3270829 (1966-09-01), Steiger
patent: 3426720 (1969-02-01), Enos
patent: 3481421 (1969-12-01), Sullivan
patent: 3509721 (1970-05-01), Crawford
patent: 3522861 (1970-08-01), Middlesworth
patent: 3581682 (1971-06-01), Kontranowski
patent: 3717215 (1973-02-01), Nigg
patent: 3921742 (1975-11-01), May

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