Geometrical instruments – Straight-line light ray type – Structurally installed
Patent
1988-06-24
1989-08-15
Haroian, Harry N.
Geometrical instruments
Straight-line light ray type
Structurally installed
G01C 500
Patent
active
048562009
ABSTRACT:
A trailer hitch alignment device includes a pointer assembly for mounting to a rear portion of a vehicle and a target assembly for mounting to the tongue of a trailer in order to align a towing ball on the vehicle with the socket portion of a trailer hitch mounted to the tongue of the trailer. The pointer assembly, including an elongated pointer and mounting means for mounting the pointer to the rear portion of a vehicle, is configured to accommodate virtually all vehicles. The target assembly includes an arcuate surface formed such that all points on the surface, in a predetermined plane, are equidistant from a preestablished center point and further includes indicating means for indicating when the pointer is perpendicular to the adjacent portion of the arcuate surface. When this perpendicular relationship is indicated, the pointer will be traversing the center point, which is mounted directly above the socket assembly, and thus the ball and socket will be aligned.
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patent: 4621432 (1986-11-01), Law
patent: 4627634 (1986-12-01), Coleman
patent: 4666176 (1987-05-01), Sand
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