Fifth wheel

Details Fifth wheel Fifth wheel

1983-05-27

1984-05-08

Peters, Jr., Joseph F.

Land vehicles

Wheeled

Articulated vehicle

280440, B62D 5312

Patent

active

044470703

ABSTRACT:
A fifth wheel provided on a tractor and adapted to be connected to a king pin fixed to a trailer. The fifth wheel comprises a base plate provided with a slot for receiving the king pin, a stationary lock fixed to the portion of the base plate near the terminal end of the slot and provided with a semi-circular recess, a movable lock pivotally supported by a vertical shaft and including a main body provided with a semi-circular recess and a hook adapted to contact the front end of the king pin when the latter moves into the slot, a spring adapted to hold the movable lock in the open position, a retainer piece movable along a guide on the base plate and adapted to hold the movable lock in the closed position, a bar connected to the retainer piece and provided with a spring for holding the retainer piece to hold the movable lock in the closed position, and projections on the bar for engaging with the base plate for holding the bar at the opened and closed positions.

REFERENCES:
patent: 3759546 (1973-09-01), Slaven
patent: 3888514 (1975-06-01), Klein
patent: 4394030 (1983-07-01), Inoue

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