ULTRASONIC FLOWMETER AND FLUID CONTROLLER HAVING THE SAME
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United States of America Patent
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Issued Date -
Apr 24, 2014
app pub date -
Oct 23, 2013
filing date -
Oct 24, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An ultrasonic flowmeter includes a measurement pipe through which a fluid flows, and two ultrasonic transceivers mounted on two transmitting bodies, respectively. The transmitting bodies are provided on outer side portions of the measurement pipe so as to be spaced from each other in an axis direction, and the measurement pipe and the two transmitting bodies are formed integrally with each other. The measurement pipe has a length, an inner diameter uniform in a length direction, and an arithmetic mean roughness Ra of an inner peripheral surface. The inner diameter is equal to or less than 5 mm, and the length of the measurement pipe is equal to or more than 30 mm. The arithmetic mean roughness Ra satisfies a relation of 0 μm
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