Piezoelectric apparatus for measuring bodily fluid pressure within a conduit
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United States of America Patent
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-
Jul 15, 1986
Issued Date -
N/A
app pub date -
May 30, 1985
filing date -
Sep 28, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for measuring pressure within a conduit is disclosed preferably comprising a tube whose resonant frequency varies with the pressure of fluid within the tube; means for passing the fluid to be measured through the tube; two active piezoelectric films disposed in intimate contact with the tube on opposite sides thereof; first electronic means for energizing the first of the films to cause the tube to resonate at its natural frequency, and second electronic means connected to the other of the films to monitor the frequency of the tube.
First Claim
Family
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