Vehicle with adjustable steering axis angle control

Details Vehicle with adjustable steering axis angle control Vehicle with adjustable steering axis angle control

1980-01-15

1981-07-21

Mitchell, David M.

Land vehicles

Wheeled

Occupant propelled type

280266, 280281LP, 280282, 280 97, 280109, 280111, B62K 508, B62K 2100

Patent

active

042794293

ABSTRACT:
A vehicle powered to move about on a front drive wheel and rearward supports, preferably a pair of wheels. The rear wheels are mounted to the frame by a steering control mechanism that facilitates pivotal steering movement of the rear wheels about two axes - a steering axis and a steering control axis. The steering control axis is coaxial with the rear wheels and is perpendicular to the steering axis. The angle of the steering axis may be varied about the steering control axis. Steering is accomplished by the rider shifting his weight from one side of the vehicle to the other. He may shift the steering axis to a position substantially parallel with the ground surface so the frame may be tilted like a bicycle in wide, sweeping high speed curves. The rear wheels then track behind the front wheels as the frame tilts about the steering axis. If the rider shifts the steering axis to a position nearly perpendicular to the ground, he may negotiate short radius, low speed turns. In this situation, the rear wheels turn about the steering axis and the frame tilts only slightly in response to leaning by the rider. Shifting of the steering axis is accomplished by lifting or lowering handles affixed to the axle.

REFERENCES:
patent: 1548973 (1925-08-01), Beeler
patent: 2482472 (1949-09-01), Fried
patent: 3062559 (1962-11-01), Hewitt
patent: 3311388 (1967-03-01), Ryan et al.
patent: 3403927 (1968-10-01), Rettger, Jr.
patent: 3669468 (1972-06-01), Rich
patent: 3799565 (1974-03-01), Burtis et al.
patent: 3913929 (1975-10-01), Matsuara
patent: 4198072 (1980-04-01), Hopkins

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