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Semi-tractor fifth wheel sensor and rail car stanchion sensor for a trailer

  • US 6,587,041 B1
  • Filed: 04/20/2000
  • Issued: 07/01/2003
  • Est. Priority Date: 04/20/2000
  • Status: Expired due to Fees
First Claim
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1. A system for sensing the physical presence of a semi-tractor as the mechanical connection between a trailer and a fifth wheel of the semi-tractor is made, or for sensing the physical presence of a rail car as the mechanical connection between the trailer and a stanchion plate of the rail car is made, said system comprising:

  • a trailer;

    connecting means provided on said trailer for connecting said trailer to a semi-tractor or to a rail car stanchion plate; and

    sensing means provided on said trailer for sensing the physical presence of a fifth wheel of a semi-tractor and a stanchion plate of a rail car, whichever is connected to said trailer.

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