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Tire pressure sensor

  • US 8,373,551 B2
  • Filed: 07/29/2009
  • Issued: 02/12/2013
  • Est. Priority Date: 07/29/2009
  • Status: Active Grant
First Claim
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1. A tire pressure sensor for a pneumatic tire, the tire pressure sensor comprising:

  • a housing;

    a pressure transducer within the housing;

    a transmitter within the housing electronically coupled to the pressure transducer;

    one or more batteries within the housing connected to deliver electrical power to the pressure transducer and to the transmitter;

    a pressurized compartment within the housing bounded at least partially by a flexible membrane, the membrane within the housing and having an outward surface spaced apart from the housing;

    wherein the pressure transducer is in fluid communication with air within the compartment; and

    at least one inlet port extending through the housing to allow pressurized air within the tire to contact the outward surface of the membrane;

    wherein the pressure transducer, the transmitter and the one or more batteries are encased within the housing so as to prevent contact with the pressurized air within the tire.

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