Fifth wheel plate assembly

Details Fifth wheel plate assembly Fifth wheel plate assembly

1975-02-12

1976-06-22

Wood, Jr., M. H.

Land vehicles

Wheeled

Articulated vehicle

B62D 5310

Patent

active

039647668

ABSTRACT:
A fifth wheel plate assembly for a trailer hitch for securing trailers to railway flat cars includes a top plate having an opening in which a movable clamp or lock jaw is supported for grasping and locking the kingpin of a trailer to the fifth wheel. The lock jaw is provided with slidable extensions which are engaged by a lock screw mounted below the fifth wheel plate and which moves the lock jaw between open and closed positions. When in a closed position a slidable bolt assembly is movable transversely of the extensions into keeper openings within the extensions for maintaining the locking jaw in its closed position. The locking bolt is slidable in a tube provided with a diagonal recess which accommodates the stem of a manually operated handle for sliding the locking bolt. A flag or indicator is pivotally mounted underneath the top plate on an axis parallel to the axis of the locking bolt. The indicator includes an arm at one end and a flag at the other end. When the bolt is in a locked position relative to the keepers on the extension the flag is visible having pivoted by gravity to a lowered position and when the bolt is in an unlocked position the flag is out of sight shielded to the view of the operator.

REFERENCES:
patent: 2861818 (1958-11-01), Kayler et al.
patent: 3751079 (1973-08-01), Marulic et al.

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