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US 8,806,734 B2Granted
Flowmeter and method
AssigneeCameron International Corporation
InventorsEmanuel Gottlieb, Donald R. Augenstein
Life of this patent
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Abstract
A method of producing an ultrasonic flow meter having the steps of fabricating a tube made of a sound absorbing material. There is the step of machining in the tube a channel having a constant inner diameter through which fluid flows. There is a step of attaching the cylinder to the ultrasonic flow meter.
Claims1
A method of producing an ultrasonic flowmeter comprising the steps of:
- fabricating a tube made of a sound absorbing material made of a polymer filled with attenuative particles, the polymer is either an epoxy, nylon, PTFE or PEEK, the particles are either metal, metal oxide, glass microspheres or rubber having a mesh size less or equal to the acoustic wavelength, the tube has a length L and a diameter opening D such that under volume flow conditions where Q>0.2 liters/hour, the tube dimensions L/D^2 are greater than 1385/meters when C>1400 m/s, where C is a speed of sound in the fluid;
- machining in the tube a channel having a constant inner diameter through which fluid flows;
- and
- attaching the tube to the ultrasonic flowmeter so that essentially all non-fluid paths of sound produced by transducers of the flowmeter are absorbed by the tube.
1 more element
Dependencies are inferred from the claim text.