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A spring assembly is carried by a mounting casting. The mounting casting includes a receptacle which is adapted to mount to a horizontal frame member by means of a vertical bolt which, when tightened, adjusts the elevation of the spring assembly by rotating the mounting casting about the frame membe

A spring assembly is carried by a mounting casting. The mounting casting includes a receptacle which is adapted to mount to a horizontal frame member by means of a vertical bolt which, when tightened, adjusts the elevation of the spring assembly by rotating the mounting casting about the frame member due to a shim effect achieved by the slight off-parallel alignment of the receptacle and the axes of the springs. This raises the spring assembly to take its weight off the draw bar and makes it easier to telescope the draw bar. A spring casting includes upper dogs for mounting an actuating lever which is rotatable between a latching and an unlatched position by vertical motion. A latch member on the draw bar is locked between the spring casting and the lever, but is released when the lever is lowered to permit the draw bar to be extended to the rear for alignment with a trailer hitch. Other improvements permit the use of coil springs without grinding the ends flat.

대표청구항 ▼

In a trailer hitch apparatus including a mounting frame adapted to mount the apparatus beneath a towing vehicle including horizontal frame means, and further including a draw bar, a movable member releasably securable to and receiving said draw bar for moving longitudinally of the axis of said draw

In a trailer hitch apparatus including a mounting frame adapted to mount the apparatus beneath a towing vehicle including horizontal frame means, and further including a draw bar, a movable member releasably securable to and receiving said draw bar for moving longitudinally of the axis of said draw bar when secured to said draw bar, and spring means carried with said member for urging said member to a rest position and for cushioning draw bar forces, the improvement comprising mounting means for mounting said spring means and said member carried therewith to said horizontal frame means including at least one horizontal element adapted to be assembled to said horizontal frame means; fastener means for securing said element to said frame means; said mounting means including receptacle means at least partially defined by said horizontal element and adapted to receive said horizontal frame means for mounting said spring means and said movable member to said horizontal frame means in such a manner that as said fastener means is tightened to secure said element to said horizontal frame means, said spring means and said movable member are raised relative to said draw bar.