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Truck door locking system

  • US 4,669,767 A
  • Filed: 03/13/1986
  • Issued: 06/02/1987
  • Est. Priority Date: 03/13/1986
  • Status: Expired due to Fees
First Claim
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1. In a truck door locking system for the securing of a truck trailer or truck box enclosure door in a closed position, the door located at the rear of the trailer in a closed position and communicating with the sides, top and bottom of the trailer and movable between an open and closed position, the improvement comprising:

  • an elongated hollow holding sleeve secured to the inside of the door and extending lengthwise across the width of the door;

    a locking plate and securing plate, the securing plate secured to one side of the trailer and the locking plate secured to the opposite side of the trailer, each plate including an aperture with said apertures being aligned with the sleeve with the aperture of the locking plate further communicating with the exterior of the trailer side through a cut out portion therein;

    a locking bar, the bar having a cross-sectional area throughout its length which is less than the cross-sectional area of the holding sleeve and the apertures of the locking and securing plates and a portion thereof generally being inserted through the aperture of the locking plate, hollow holding sleeve and the aperture of the securing plate thereby preventing movement of the hollow holding sleeve when the locking bar is extending therethrough;

    a locking means, said locking means attached to the locking plate for selectively securing the locking bar within the locking plate;

    brackets, the brackets partially conforming to the shape of the hollow holding sleeve and secured to the inside of the trailer door with the hollow holding sleeve passing between the brackets and door and held securely against the door;

    an alignment surface, the alignment surface circumferentially spaced about the aperture on the securing plate for permitting the locking bar to align with the aperture therein.

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