Skateboard with longitudinally adjustable wheels

Claim 2

A skateboard with longitudinally adjustable wheels including, in combination: a. a footboard having elongated track means running along its underside; b. front and rear wheel trucks; c. front and rear guiding and locking means for said front and rear wheel trucks, respectively, for securing said front and rear wheel trucks to adjacent portions of said track means in selected longitudinal positions, each of said guiding and locking means including:

Claim 3

slide plate means on said associated truck means having a top surface engaging the under surface of the adjacent portion of said track means, said adjacent portion of said track means being in the form of a central channel having inwardly opposed flanges to define a T groove running longitudinally along the underside of said footboard, said slide plate means including longitudinally spaced openings; 2. slide bar means of rectangular cross section received in said channel defining the cross portion of said T groove and including longitudinally spaced threaded bores exposed between the opposing flanges defining the stem portion of said T groove; and, 3. threaded bolt means having heads of larger diameter than said openings and shank portions individually receivable through said longitudinally spaced openings in said slide plate means and in said stem portion of said T groove to be threaded in said longitudinally spaced threaded bores, whereby said trucks may be longitudinally positioned along said track means at a desired spacing from each other and the front and rear ends of said footboard, said slide bar means serving as guides for such longitudinal positioning, and whereby said trucks may be secured in their set positions by tightening of said threaded bolt means to draw said slide bar means against the underside of said inwardly opposed flanges and thereby sandwich and grip said flanges between said slide bar means and the top surfaces of said slide plate means.

Claim 4

slide plate means on said associated truck means having a top surface engaging the under surface of the adjacent portion of said track means, said adjacent portion of said track means being in the form of a central channel having inwardly opposed flanges to define a T groove running longitudinally along the underside of said footboard, said slide plate means including longitudinally spaced openings; 2. slide bar means of rectangular cross section received in said channel defining the cross portion of said T groove and including longitudinally spaced threaded bores exposed between the opposing flanges defining the stem portion of said T groove; and, 3. threaded bolt means having heads of larger diameter than said openings and shank portions individually receivable through said longitudinally spaced openings in said slide plate means and in said stem portion of said T groove to be threaded in said longitudinally spaced threaded bores, whereby said trucks may be longitudinally positioned along said track means at a desired spacing from each other and the front and rear ends of said footboard, said slide bar means serving as guides for such longitudinal positioning, and whereby said trucks may be secured in their set positions by tightening of said threaded bolt means to draw said slide bar means against the underside of said inwardly opposed flanges and thereby sandwich and grip said flanges between said slide bar means and the top surfaces of said slide plate means.

Claim 5

A skateboard with longitudinally adjustable wheels including, in combination: a. a foot board having on its under surface an elongated track in the form of a central channel having inwardly opposed flanges to define a T groove running longitudinally along the center line of said board; b. front and rear wheel trucks; c. front and rear slide plates having their bottom surfaces secured to said wheel trucks respectively and their top surfaces engaging the under surface of said track, each of said slide plates including longitudinally spaced openings; d. front and rear slide bars of rectangular cross section received in said channel defining the cross portion of said T groove and positioned adjacent to opposite end portions of said track respectively, each of said slide bars having a pair of longitudinally spaced threaded bores exposed between the opposing flanges defining the stem portion of said T groove; and e. threaded bolt means having heads of larger diameter than said openings and shank portions individually receivable through said longitudinally spaced openings in said slide plates and in said stem portion of said T groove to be threaded in said longitudinally spaced threaded bores, whereby said trucks may be longitudinally positioned along said track at a desired spacing from each other and the front and rear ends of said board, said slide bars serving as guides for such longitudinal positioning, and whereby said trucks may be secured in their set positions by tightening said threaded bolt means to draw said slide bars against the underside of said inwardly opposed flanges and thereby sandwich and grip said flanges between said slide bars and the top surfaces of said slide plates, the longitudinal length of said slide bars corresponding to the longitudinal length of said slide plates, respectively, so that a gripping force is applied along the entire length of said slide plates by the slide bars, said slide bars thereby serving the additional function of a securing means for said trucks.

Claim 6

A skateboard with longitudinally adjustable wheels including, in combination: a. a foot board having on its under surface an elongated track in the form of a central channel having inwardly opposed flanges to define a T groove running longitudinally along the center line of said board; b. front and rear wheel trucks; c. front and rear slide plates having their bottom surfaces secured to said wheel trucks respectively and their top surfaces engaging the under surface of said track, each of said slide plates including longitudinally spaced openings; d. front and rear slide bars of rectangular cross section received in said channel defining the cross portion of said T groove and positioned adjacent to opposite end portions of said track respectively, each of said slide bars having a pair of longitudinally spaced threaded bores exposed between the opposing flanges defining the stem portion of said T groove; and e. threaded bolt means having heads of larger diameter than said openings and shank portions individually receivable through said longitudinally spaced openings in said slide plates and in said stem portion of said T groove to be threaded in said longitudinally spaced threaded bores, whereby said trucks may be longitudinally positioned along said track at a desired spacing from each other and the front and rear ends of said board, said slide bars serving as guides for such longitudinal positioning, and whereby said trucks may be secured in their set positions by tightening said threaded bolt means to draw said slide bars against the underside of said inwardly opposed flanges and thereby sandwich and grip said flanges between said slide bars and the top surfaces of said slide plates, the longitudinal length of said slide bars corresponding to the longitudinal length of said slide plates, respectively, so that a gripping force is applied along the entire length of said slide plates by the slide bars, said slide bars thereby serving the additional function of a securing means for said trucks.

Claim 7

A skateboard according to claim 2, in which said T groove opens out the front and rear ends of said track so that each of said trucks and associated slide plate, bar and bolt means can be readily slid out of said T groove and completely separated from said foot board by loosening said bolt means.

Claim 8

A skateboard according to claim 2, in which said foot board is made of flexible plastic material, said track constituting an elongated flexible plastic strip within which said T groove is formed, said strip being secured to the underside of said foot board for flexing therewith, whereby the elevation of said foot board above the wheel trucks is increased over such elevation in the absence of said track and slide plates by an amount corresponding to the combined thickness of the track and slide plates, controlling of said combined thickness thereby enabling a desired elevation of said foot board to be realized.

Claim 9

A skateboard according to claim 2, in which the heads of said bolt means comprise wings to define wing bolts whereby tightening and loosening of said bolt means can be accomplished manually, the necessity of a special tool for making adjustments in the longitudinal positions of said wheel trucks thus being avoided.