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Valve cap pressure indicator

  • US 4,763,517 A
  • Filed: 06/16/1987
  • Issued: 08/16/1988
  • Est. Priority Date: 06/16/1987
  • Status: Expired due to Fees
First Claim
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1. A valve stem-mounted system for measuring and displaying the pressure of air within a pneumatic tire comprising:

  • (a) a housing, a portion of which is threaded for mounting onto a tire valve stem;

    (b) a pressure transducer mounted within said housing;

    (c) a signal processing unit mounted within said housing, said processing unit being operationally connected to said transducer for converting signals received from said transducer;

    (d) display means mounted within said housing and electrically connected to said signal processing unit for displaying tire air pressure;

    (e) an electric battery power source mounted within said housing and connected through switch means to furnish power to operate said signal processing unit and said display means;

    (f) means for manually operating said switch to power said processing unit and said display means; and

    (g) means for bringing said pressure transducer into fluid communication with the interior of said tire;

    wherein said display means comprises a plurality of display chips.

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