Trailer hitch assembly

Details Trailer hitch assembly Trailer hitch assembly

2006-01-31

2006-01-31

Winner, Tony (Department: 3611)

Land vehicles

Wheeled

Articulated vehicle

C280S460100

Reexamination Certificate

active

06991246

ABSTRACT:
A trailer hitch assembly is used with a trailer having a plurality of wheels each rotatable about a horizontal axis and a vertical axis. The hitch assembly includes coupling elements on the trailer for fixedly engaging the trailer to a towing vehicle in a horizontal plane parallel to the ground surface during a rearward motion of the vehicle and the trailer and for pivotably linking the trailer to the vehicle in the horizontal plane during a forward motion of the vehicle and the trailer. A locking mechanism automatically preventing rotation of the wheels about the respective second axes during the forward motion of the trailer and the vehicle and for enabling rotation of the wheels about the respective second axes during the rearward motion of the trailer and the vehicle.

REFERENCES:
patent: 3033593 (1962-05-01), Zaha
patent: 3379452 (1968-04-01), Torrisi
patent: 3815939 (1974-06-01), Pettay
patent: 4076264 (1978-02-01), Chatterley
patent: 4305602 (1981-12-01), Ungvari et al.
patent: 4426097 (1984-01-01), Livingston
patent: 4452465 (1984-06-01), Bourke
patent: 4509769 (1985-04-01), Weber
patent: 4512593 (1985-04-01), Ehrhardt
patent: 4664403 (1987-05-01), Livingston
patent: 6357778 (2002-03-01), Ross
patent: 6626449 (2003-09-01), Hazen

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