Motor vehicles – Special wheel base – Five or more wheels
Patent
1982-01-11
1984-02-21
Pekar, John A.
Motor vehicles
Special wheel base
Five or more wheels
180 2401, 180 2402, 180 2407, 280111, 301 43, 301 52, 301114, B62D 6110
Patent
active
044324278
ABSTRACT:
A tractor has three pairs of ground wheels: front and rear steerable pairs which cooperate to steer the tractor, and a central pair. The central pair of wheels each are connected to the frame through a hydraulic cylinder and piston assembly which 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 and 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. 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 which energizes a hydraulic pump that in turn, separately powers each of the hydraulic motors and the other hydraulic actuated mechanisms.
REFERENCES:
patent: 1156471 (1915-10-01), Elliott
patent: 1608468 (1926-11-01), Schramm
patent: 3068049 (1962-12-01), Smith
patent: 3099460 (1963-07-01), Sheehan
patent: 3183991 (1965-05-01), Gamaunt
patent: 3717215 (1973-02-01), Nigg et al.
patent: 4354711 (1982-10-01), Main
Albright Penrose L.
Fugate D. Lynn
Pekar John A.
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