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Method, control system and equipment to prevent the theft of an articulated vehicle and/or a trailer to be connected with a drawing vehicle

  • US 4,838,570 A
  • Filed: 08/31/1987
  • Issued: 06/13/1989
  • Est. Priority Date: 11/12/1985
  • Status: Expired due to Fees
First Claim
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1. A method of preventing theft of a tractor trailer combination or trailer alone, comprising:

  • providing a programmable first control system means on a tractor vehicle having a predetermined reference code stored therein and adapted to compare a subsequent reference code entered by a user and for generating a signal in response thereto;

    providing a second control means on said trailer coupled to said first control system means for receiving the signal from the first control means and to generate a control signal in response thereto; and

    providing a locking means on said trailer coupled to said second control system means to receive the control signal therefrom and in response thereto, in a first unlocked position rendering the trailer in a towable condition, and in a second locked position rendering the trailer in an untowable condition.

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