Trailer hitching aid

Details Trailer hitching aid Trailer hitching aid

1989-04-10

1991-01-29

Bertsch, Richard A.

Land vehicles

Wheeled

Articulated vehicle

340686, 340687, B60D 136

Patent

active

049881167

ABSTRACT:
A trailer hitch positioning aid having a magnetic switching unit mounted upon the hitch ball and a corresponding permanent magnetic field unit secured to the socket of the hitch. The magnetic switches are mounted about the ball in a triangular pattern, while the magnetic field is in a "U" shape, so that closing of one or more of the magnetic switches indicates relative position of the hitch ball and socket. No physical connection is necessary between the trailer and the towing vehicle.

REFERENCES:
patent: 2797406 (1957-06-01), Tanis et al.
patent: 3227888 (1966-01-01), Shepherd et al.
patent: 3295117 (1966-12-01), Ault et al.
patent: 3411076 (1968-11-01), Federici et al.
patent: 3479582 (1969-11-01), Meyer
patent: 3594740 (1967-08-01), Comeau
patent: 3852661 (1974-12-01), Szabo et al.
patent: 3924257 (1975-12-01), Roberts
patent: 4165501 (1979-08-01), Bongort et al.
patent: 4285138 (1981-08-01), Berry

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