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Temperature adjusting low pressure sensor

  • US 5,604,338 A
  • Filed: 11/16/1995
  • Issued: 02/18/1997
  • Est. Priority Date: 11/16/1995
  • Status: Expired due to Fees
First Claim
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1. A temperature compensating low pressure sensing device for sensing a change in a mass of a fluid of a pressurized vessel due to a leak in the vessel, comprising:

  • a housing disposed within the pressurized vessel;

    a pressure diaphragm attached to said housing in communication with the fluid in the pressurized vessel;

    a retainer in contact with said pressure diaphragm and movably disposed within said housing;

    a temperature sensitive thermostat movably disposed within said housing, said thermostat moving in relation to a change in temperature of the fluid;

    contact means for providing contact between said diaphragm and said thermostat; and

    spring means disposed in said housing in communication with said retainer for counteracting the movement of said thermostat due to a change in temperature of the fluid, wherein when said diaphragm is acted upon by a shift in pressure due to a temperature change of the fluid, said spring means moves said pressure diaphragm at the same rate as said thermostat to maintain contact between said thermostat and said contact means.

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