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Warning and safety system indicating truck trailer tip-over condition

  • US 4,988,974 A
  • Filed: 07/17/1989
  • Issued: 01/29/1991
  • Est. Priority Date: 07/17/1989
  • Status: Expired due to Fees
First Claim
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1. In a tractor-trailed truck, including a trailer capable of being raised by a hydraulic cylinder mounted between the front end of said trailer and the fifth wheel of said trailer, means for detecting the side-to-side or tip rotation of the front end of said trailer about the connection between said hydraulic cylinder and said fifth wheel, said detecting means including tip angle measuring means mounted adjacent to said fifth wheel, and means connecting said tip angle measuring means with one of said front end of said trailer or said hydraulic cylinder adjacent said front end of said trailer, said connecting means moving though substantially the same angle as said front end of said trailer, when said front end of said trailer undergoes tip rotation, to thereby proportionally rotate said tip angle measuring means.

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