Hitch head having jaws and lock block with cooperating tapered s

Details Hitch head having jaws and lock block with cooperating tapered s Hitch head having jaws and lock block with cooperating tapered s

1980-06-12

1983-03-08

Brust, Joseph Paul

Land vehicles

Wheeled

Articulated vehicle

280435, 410 64, B62D 5308, B62D 5310, B62D 5312

Patent

active

043758940

ABSTRACT:
A hitch head or fifth wheel is provided including a pair of pivotable jaws which in closed position hold in place a kingpin of a highway trailer. A horizontally movable lock block engages the rear portion of the jaws and holds the jaws in closed position. The lock block is movable to a position out of engagement with the jaws to allow escape of the kingpin. The rear surfaces of the jaws and the side surface of the lock block are provided with cooperating tapers which reduce frictional drag when the lock block is moved to open position, and when it returns to locked position, compensate for manufacturing tolerances which tend to create misalignment between the lock block and the rear portion of the jaws, compensate for wear in the engaging surfaces of the jaws and lock block, and provide a tight fit without undue clearance when the lock block engages the jaws.

REFERENCES:
patent: 1479796 (1924-01-01), Endebrock
patent: 2676034 (1954-04-01), Tracey
patent: 3346223 (1967-10-01), Broling
patent: 3358954 (1967-12-01), Smith et al.
patent: 3632145 (1972-01-01), Davis et al.
patent: 3870342 (1975-03-01), Baxter et al.
patent: 4213590 (1980-07-01), Van Dyke
patent: 4221397 (1980-09-01), Holt
patent: 4333666 (1982-06-01), Hammonds

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