Shock dampening hitch ball assembly

Details Shock dampening hitch ball assembly Shock dampening hitch ball assembly

2011-07-12

2011-07-12

Dickson, Paul N (Department: 3611)

Land vehicles

Wheeled

Articulated vehicle

C280S507000, C280S506000, C280S504000, C280S477000, C280S484000, C280S416100, C280S415100

Reexamination Certificate

active

07976054

ABSTRACT:
A hitch ball assembly attenuates the lateral forces experienced by a trailer while being towed by a tractor. A ball assembly has a flange with a neck extending upwardly therefrom and a hitch ball seated atop the neck. A wedge, having a pair of linear points, extends downwardly from the flange as does a threaded shank that passes through the wedge, the points being located on either side of the shank. The ball assembly is attached to a draw bar attached mount arm such that the shank passes through a bore in the mount arm with the points of the wedge seated within slots on an upper surface of the mount arm. A resilient bushing is received on the shank and abuts a lower surface of the mount arm, while a plate abuts the bushing, each held thereat by a locking nut threadably attached to an end of the shank.

REFERENCES:
patent: 2501721 (1950-03-01), Hagenah
patent: 2516555 (1950-07-01), Dear
patent: 3307857 (1967-03-01), Robertson
patent: 4978133 (1990-12-01), Thorne et al.
patent: 5085452 (1992-02-01), Janeiro
patent: 5265899 (1993-11-01), Harrison
patent: 5378008 (1995-01-01), McCrossen
patent: 5823560 (1998-10-01), Van Vleet
patent: 6581953 (2003-06-01), Jerry
patent: 6908098 (2005-06-01), Milazzo
patent: 6956468 (2005-10-01), Lee et al.

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