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Method and apparatus for monitoring tire pressure

  • US 4,186,377 A
  • Filed: 12/08/1977
  • Issued: 01/29/1980
  • Est. Priority Date: 03/11/1976
  • Status: Expired due to Term
First Claim
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1. A system for monitoring the pressure of a pneumatic tire and determining the rate of loss of such pressure in the event of a leak, comprising(a) signal generating means operatively associated with said tire and adapted to produce a signal at each of at least two different, time-spaced low pressure levels,(b) transducer means spaced from said tire and adapted to detect said signals and generate electrical signals therefrom,(c) electrical processing means connected to said transducer means and adapted to measure the time lapse between signals and calculate therefrom the time remaining for said pressure to reach a critical level, and,(d) display means connected to said processing means and adapted to display said remaining time in visual form.

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