System and method for monitoring a pneumatic tire

  • US 5,731,516 A
  • Filed: 05/02/1996
  • Issued: 03/24/1998
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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1. Apparatus for monitoring inflation pressure of a pneumatic tire mounted on a conductive wheel, the apparatus comprising:

  • a cylindraceous housing having a passage to allow air ingress and egress to and from the pneumatic tire, the housing including an elongate portion adapted for extension through an aperture of the wheel, the housing also including a conductive portion, the elongate portion being sized to allow the conductive portion of the housing to contact the conductive wheel to allow transmission of the signal using the conductive wheel;

    a pressure transducer disposed within the housing in fluid communication with the pneumatic tire for providing a signal indicative of the inflation pressure;

    an electronic circuit for monitoring the signal and conditioning the signal for transmission to a remote receiver; and

    a needle and spring disposed within one end of the elongate portion to selectively control inflation or deflation of the pneumatic tire.

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