Motor-cycle frame

Details Motor-cycle frame Motor-cycle frame

1981-01-16

1983-04-05

Peters, Jr., Joseph F.

Motor vehicles

Special wheel base

Having only two wheels

280275, 280283, 280284, B62D 6102, B62K 2504

Patent

active

043788572

ABSTRACT:
The main frame member of a motor-cycle mounts a steering head supporting the front fork, and at its rear end also a rear fork. Both forks are provided with shock absorbers and especially with motor-cycles suited for moto-cross running the movements of the forks in action may be considerable. The combined center of gravity of motorcycle and rider will change due to road and driving conditions, which means that the load upon the shock absorbers will change continuously. Undue compression or expansion of the front fork shock absorbers will alter the inclination of the front fork in relation to the plane of the ground, which makes steering difficult. To counteract such alterations the steering head includes a hoirzontal pivot and lever means connected to the rear fork for adjusting the position of the vertical axis of the steering head by causing a rotation of the head about the horizontal pivot in response to the swinging of the rear fork.

REFERENCES:
patent: 2863672 (1958-12-01), Murata
patent: 3301575 (1967-01-01), Ryan et al.
patent: 3877539 (1975-04-01), Tilkens
patent: 4162797 (1979-07-01), McBride

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