Wheel-bearing truck
View Patent ↗A wheel-bearing truck as might be used on a skateboard includes a base, a transverse hanger mounted pivotally at or near its center to the base and adapted to bear a road-engaging wheel at each opposed end. There is a pair of telescopic arms, one end of each being attached to the hanger flanking its center. A longitudinal spring fixed with respect to the base interacts with the other end of each telescopic arm.
1. A truck comprising:
a base comprising a hanger pivot pin, and a longitudinal v-shaped guide,
a transverse hanger mounted at its center to the hanger pivot pin and adapted to bear a road-engaging wheel at each opposed end thereof,
a pair of telescopic arms, each telescopic arm comprising a hanger end portion and a slider end portion that is capable of telescoping within the hanger end portion,
each slider end portion is connected to a slider by a ball joint,
each hanger end portion pivotally attaches to the hanger and flanks the hanger pivot pin,
the slider is fixed to a spring sleeve that houses a longitudinal spring and the slider is capable of sliding along the longitudinal v-shaped guide,
a preload bolt passes through the longitudinal spring with one end attached to the base and it other end attached to a preload nut, wherein rotation of the preload bolt will compress the longitudinal spring.
2. The truck of claim 1 wherein the spring is a compression coil spring.
3. The truck of claim 2 wherein the spring sleeve is screw-fixed to the slider and locating the preload nut with which the preload bolt engages.