Adjustable Base for Longboard Reverse Kingpin Trucks

Abstract

This invention discloses an adjustable base for skateboard trucks where a two-piece design consisting of a mounting bracket and a slider can be set to any angle within a specific range. The design uses pairs of concentric, mating arced features of different radii on the slider and mounting bracket to maintain constant ride height of the truck assembly when setup with a compatible hanger that has axles which are coincident with the center of the arced features. The design uses a flat on the bottom of the slider to achieve an overall low profile which is desirable to skaters.

1 . An adjustable base for skateboard trucks comprised of a mounting bracket that attaches directly to the deck and a slider that can be set at desired angles within the mounting bracket without affecting ride height or wheelbase of the skateboard. The slider is held in place within the bracket by means of one or more machine screws that pass through the bracket. Each machine screw may be pre-tensioned using a compatible nut. 
     
     
         2 . The adjustable base of  claim 1  where the slider and mounting bracket have two or more concentric pairs of mating arced features with different radii to provide the slider with radial support from the mounting bracket. The center of the circular arcs coincides with longitudinal axis of the axles of a compatible hanger so that the axle position does not change over the range of the adjustable base. 
     
     
         3 . The adjustable base of  claim 2  where a flat along the bottom of the slider is used to reduce the overall height of the assembly when setup in the mounting bracket.