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Pressure measurement and calibration apparatus using gravity-induced diaphragm deflection

  • US 5,515,711 A
  • Filed: 06/26/1995
  • Issued: 05/14/1996
  • Est. Priority Date: 06/26/1995
  • Status: Expired due to Term
First Claim
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1. Pressure measurement and calibration apparatus, comprising:

  • a pressure sensing assembly, said assembly including a deflectable diaphragm and means for detecting deflection of said diaphragm and for generating an output signal representative of said deflection;

    means for controllably rotating said diaphragm about an axis normal to the direction of local gravitational acceleration on said diaphragm, whereby said diaphragm is capable of deflection in response to local gravitational acceleration on said diaphragm, said deflection of said diaphragm being variable as a function of the angle between said diaphragm and said direction of local gravitational force; and

    means for controllably conducting a flow of a fluid against said diaphragm to substantially eliminate said deflection.

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