Motorcycle front fork assembly

Details Motorcycle front fork assembly Motorcycle front fork assembly

1978-05-30

1980-01-22

Silverstrim, John P.

Land vehicles

Wheeled

Occupant propelled type

B62K 2102

Patent

active

041846958

ABSTRACT:
Flutter and weave instability of a motorcycle front fork assembly is substantially reduced by achieving an overall lateral stiffness of the fork assembly mounts of at least 1000 lbs./in. This is done by providing an assembly including a pair of fork legs, each having a minimum flexural rigidity of 10.8.times.10.sup.6 lbs.-in.sup.2 ; a pair of rotational bearings attached to the base of each leg, each bearing carrying a suspension link having a minimum flexural rigidity of 3.8.times.10.sup.6 lbs.-in.sup.2 ; a wheel spindle having a minimum rigidity of 1.9.times.10.sup.6 lbs.-in.sup.2 ; and resilient suspension means. The fork legs are substantially parallel to each other and extend downwardly from a steering head. The rotational bearings have negligible radial clearance. The suspension links extend forwardly from the rotational bearings and are mounted to the associated leg of each. The wheel spindle is rigidly clamped and extends between the free ends of the suspension links. The resilient suspension means extend between each fork and its suspension link.

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