Land vehicles – Wheeled – Articulated vehicle
Patent
1990-09-07
1991-10-22
Marmor, Charles A.
Land vehicles
Wheeled
Articulated vehicle
280504, 280901, 403254, 403316, 403353, B60D 101
Patent
active
050589156
ABSTRACT:
A trailer hitch including a pin that extends axially from a pivotal mounting by a universal joint of a rocking or tilting platform of a trailer draw or towbar. The pin is preferably cylindrical and is grooved circumferentially for fitting into a wide head end of a keyhole or keyway slot formed in a mounting plate attached to a truck bed. The keyway forward circular end includes a flange therearound that fits into the cylindrical pin groove, prohibiting the pin from lifting from the keyway. To complete the locking of the pin to mounting plate, either the pin includes a plug for extending axially into a hole formed in the mounting plate in the center of the keyway forward end, or a brace plate is installed in a keyway large rearward end, resting against the pin prohibiting the pin for being slid therefrom. Which plug is extended or withdrawn by turning a locking or camming rod journaled across the pin, which locking or camming rod is spring biased to a plug extended attitude.
REFERENCES:
patent: 2759737 (1956-08-01), Manning
patent: 2925286 (1960-02-01), Hodges et al.
patent: 3220750 (1965-11-01), Mead
patent: 3730557 (1973-05-01), Cox
patent: 3843161 (1974-10-01), Hastings
patent: 3893713 (1975-07-01), Ivy
patent: 4183548 (1980-01-01), Schneckloth
patent: 4428596 (1984-01-01), Bell et al.
Bompey Mitchell
Marmor Charles A.
Russell M. Reid
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