Hitch head having manual jaw unlock

Details Hitch head having manual jaw unlock Hitch head having manual jaw unlock

1979-02-26

1980-07-22

Zugel, Francis K.

Freight accommodation on freight carrier

Load bearer accommodation

Semitrailer accommodation

403316, B60P 700

Patent

active

042135907

ABSTRACT:
A hitch head or fifth wheel is provided including a pair of pivotable jaws which hold in place a kingpin of a highway trailer. A horizontally movable lock block, biased by a stiff spring to closed position, engages the jaws and holds them in closed position, maintaining the kingpin in place. The lock block is movable to an open position by a finger extending through an opening in the lock block. The finger is rigidly attached to a horizontally extending operating shaft which is rotatable by a handle to move the finger to an overcenter position holding the lock block in open position. The finger includes a transversely extending protrusion which is engaged by the jaws as the kingpin exits to pivot the finger from the overcenter position and allow the lock block to move to a position engaging the rear portion of the jaws, holding the jaws open until another kingpin enters the jaws and pivots the jaws to closed position.

REFERENCES:
patent: 2936983 (1960-05-01), Markestein et al.
patent: 3346223 (1967-10-01), Broling
patent: 3358954 (1967-12-01), Smith et al.
patent: 3632145 (1972-01-01), Davis

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