Fifth wheel coupling

Details Fifth wheel coupling Fifth wheel coupling

1989-01-25

1990-03-13

Marmor, Charles A.

Land vehicles

Wheeled

Articulated vehicle

280433, 280434, 280436, B62D 5310, B62D 5312

Patent

active

049078151

ABSTRACT:
A fifth wheel coupling for connecting a semitrailer to a towing vehicle, which provides two swivel-articulated closing jaws with semicircular clearances for grasping a semitrailer king pin, and means for opening and closing the jaws which provide a hydraulic cylinder, a piston disposed therein with a rod having a central bore, a tappet disposed within the bore and protruding into the semicircular clearances, piston head and piston rod spaces, and a channel connecting the spaces which is closable by the tappet. Pressurization of the hydraulic cylinder opens the jaws, and contact of the semitrailer king pin against the tappet automatically closes the jaws.

REFERENCES:
patent: 3352571 (1967-11-01), Nelson
patent: 3539202 (1970-11-01), Nelson
patent: 4106793 (1978-08-01), Neff

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