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Fluid flowmeter

  • US 4,550,615 A
  • Filed: 08/29/1983
  • Issued: 11/05/1985
  • Est. Priority Date: 09/06/1982
  • Status: Expired due to Fees
First Claim
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1. A fluid flowmeter comprising a body portion, a chamber within the body portion through which fluid is passed in use of the flowmeter, first and second fluid flow channels in the body portion, the first channel being connectable at one end to a supply of fluid and communicating at its other end with a nozzle which projects into the chamber, the second channel communicating at one end with the chamber and being connectable at its other end to a fluid delivery line, an acousto-electrical transducer located within the chamber and exposed directly to fluid flowing through the chamber and to acoustical energy which is emitted by the fluid, the nozzle being orientated toward the transducer whereby fluid passing into the chamber from the nozzle is caused to impinge on the transducer, the transducer being in the form of a microphone including a vibratable member which provides an electrical output signal when exposed to acoustical energy emitted by the fluid, the vibratable member or casing portion of the transducer being apertured to permit pressure equalisation at opposite faces of said vibratable member, and an indicator in circuit with the transducer for providing indication of the electrical output of the transducer.

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