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Pressure transducer apparatus

  • US 5,485,345 A
  • Filed: 11/14/1994
  • Issued: 01/16/1996
  • Est. Priority Date: 11/14/1994
  • Status: Expired due to Fees
First Claim
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1. A differential pressure transducer having a top surface and a bottom surface, a first recess formed adjacent to the top surface and a second recess formed adjacent to the bottom surface, the recesses each having a bottom wall, first and second diaphragm portions closing the respective first and second recesses, a passage extending between the first and second recesses, a motion transfer pin having opposite ends, one end integrally attached to a central part of the first diaphragm portion and the other end integrally attached to a central part of the second diaphragm portion, first and second capacitor plates disposed in at least one recess on a respective diaphragm portion and bottom wall spaced from one another to form a selected gap therebetween, means to electrically energize the capacitor plates and means to compensate for error due to common mode pressure subjected to the first and second diaphragm portions.

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