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Air conditioner refrigerant check gauge insert convertible to a tire check gauge

  • US 4,693,112 A
  • Filed: 06/12/1986
  • Issued: 09/15/1987
  • Est. Priority Date: 06/03/1985
  • Status: Expired due to Fees
First Claim
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1. A refrigerant system pressure check gauge comprising:

  • a refrigerant system gas pressure check gauge with a valve head having a valve head opening that fits on and over a refrigeration system valve;

    a valve pin within said valve head opening positioned to engage and depress a valve stem pin of said refrigeration system valve to open the valve;

    a resiliently compressible washer, mounted in said valve head opening, and having a center opening sufficiently larger than said valve pin as to not close on said valve pin in order that gas under pressure may pass on through into the valve head;

    said resiliently compressible washer being so positioned and of such thickness as to be engaged and resiliently compressed by the outher end of said refrigeration system valve as a valve stem pin is being depressed by said valve pin to open said refrigeration system valve; and

    with said valve pin positioned to engage the said valve stem pin of the refrigeration system valve fitting so that as the pressure gauge is pushed toward the refrigerant valve sitting received in said gauge valve head opening the refrigeration system valve is opened and refrigeration material gases pass from the refrigeration system through internal opening passage means through the pressure gauge to provide a refrigerant gas charge pressure reading for the refrigerant system;

    wherein a tire valve stem insert guide is provided that is a snug fit in said valve head opening for converting said pressure check gauge from a refrigerant system pressure check gauge to a tire pressure check gauge; and

    a cylindrically walled insert guide opening through said insert guide with said guide opening sized and centered to be a guide for tire valve stem threaded end insertion to aligned contact of the tire valve stem pin with said valve pin;

    said resiliently compressible washer is so positioned and of such thickness as to be engaged and resiliently compressed by the outer end of said tire valve stem as the valve stem pin is being depressed by said valve pin to open said tire air valve;

    said valve pin is positioned to engage said tire valve stem pin of a tire valve so that as the gas pressure gauge is pushed toward the tire valve stem received in said insert guide opening in the insert held in said gauge valve head opening the tire valve is opened for passage of air under tire pressure to and through internal passage means in the pressure gauge to provide an air pressure reading for tire air pressure;

    said valve stem insert guide is formed with an enlarged outer head with a shoulder that contacts the end of a gauge valve head opening projection having a circumferential periphery; and

    with said shoulder extending radially outward beyond the circumferential periphery of said gauge valve head opening projection that facilitates manual removal of said insert guide for conversion of the gauge back to the air conditioner refrigerant pressure check state.

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