Patent ID: 7425015
Filing Date: 2008-09-16
Classification: B60D

Abstract:
1. A height adjustment apparatus for use with a trailer, said apparatus compromising: (a) an outer tube having an outer tube top end and an opposing outer tube bottom end, and an outer tube inside surface and an opposing outer tube outside surface, the outer tube further comprising: (b) the outer tube operatively associated with, and overlying an inner tube, said inner tube having an inner tube top end and an opposing inner tube bottom end, and an inner tube inside surface and an opposing inner tube outside surface, said outer tube overlapping the inner tube directionally from the inner tube top end, and the inner tube further comprising: (c) an acme screw assembly, comprising said elongated acme screw suspensionally located and freely rotatable within the inner tube and cooperatively engaged to the inner tube within the internally threaded acme nut, and having an acme screw top surface and an opposing acme screw bottom surface, an unthreaded first rod surface contiguous to the acme screw top surface and an unthreaded second rod surface radially larger than said first rod surface and radially smaller than a threaded screw surface to said elongated acme screw, and an acme screw threaded top surface, said second rod surface being located contiguous to and between said first rod surface and the acme screw threaded top surface, the acme screw assembly further comprising: (d) the crank assembly causing said elongated acme screw to thread vertically through the internally threaded acme nut and the acme screw assembly to concurrently move vertically when the drive gear to the crank assembly is activated by cranking the crank assembly; (e) the top plate upper surface engaging the top plate ring inner surface rendering the acme screw assembly load-bearing to move the outer tube vertically, when the acme screw assembly is activated by cranking the crank assembly; (f) the height adjustment mechanism being linearly and integrally assembled, the outer tube telescopically and slidably encasing the inner tube, such that the outer tube can be vertically adjusted with respect to the inner tube when the crank assembly is operated; (g) a mounting means for securely installing the height adjustment mechanism to a towing vehicle, said mounting means located at the inner tube bottom end of the height adjustment mechanism; (h) the trailer having a trailer hitch including a hitching end integrally secured to the outer tube outside surface and a trailer end; (i) the trailer integrally attached to the trailer hitch at the trailer end; (j) the trailer concurrently adjusting vertically when the crank assembly to the height adjustment mechanism is operated; and (k) whereby the height adjustment apparatus adjusts the height of the trailer.