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Truck-trailer antitheft locking system

  • US 4,614,357 A
  • Filed: 07/02/1984
  • Issued: 09/30/1986
  • Est. Priority Date: 07/02/1984
  • Status: Expired due to Fees
First Claim
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1. An antitheft locking system for a semi-trailer comprising:

  • a plunger for positioning with respect to the hitch pin on a semi-trailer, said plunger being movable from a retracted position to an extended position so that in the extended position it inhibits access to the hitch pin on the semi-trailer and in its retracted position, permits access to the hitch pin; and

    means for controllably extending said plunger.

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