Land vehicles – Wheeled – Articulated vehicle
Patent
1984-04-30
1986-03-25
Pekar, John A.
Land vehicles
Wheeled
Articulated vehicle
70237, B60D 112, B60D 106
Patent
active
045778841
ABSTRACT:
A device for preventing unauthorized intentional uncoupling or accidental uncoupling of a trailer from a towing vehicle. The threaded shaft of the ball slides through an upper housing allowing the upper housing to contain the shoulder of the ball so that the ball and upper housing can be mounted to a tow bar by inserting the threaded shaft of the tow ball through the aperture in a tow bar and then screwing a flanged nut onto the threaded shaft. A lower housing is then placed around the flanged nut and bolted to the upper housing so that the tow bar and the flanged portion of the flanged nut are sandwiched between the upper and lower housings. There is a yoke which encircles the shank of the tow ball, the dimensions of which make it impossible for it to slide over the ball. There is a locking hat which is placed over the trailer tongue ball socket having legs extending vertically downward allowing it to be locked to the yoke. Once in locked position, the trailer hitch cannot be disengaged without first unlocking and removing the locking hat. The locking hat and yoke do not limit the inherent rotation of the socket about the ball.
REFERENCES:
patent: 3759548 (1973-09-01), Kothmann
patent: 3876242 (1975-04-01), Eaton
patent: 4032171 (1977-06-01), Allen
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