Liquid flowmeter

Details Liquid flowmeter Liquid flowmeter

1981-07-22

1983-09-20

Birmiel, Howard A.

Measuring and testing

Volume or rate of flow

Using turbine

7386179, 7386189, G01F 112

Patent

active

044048610

ABSTRACT:
A flowmeter having a flow passageway with co-axial inlet and outlet openings at its opposite ends and a vaned flow measuring rotor between the openings. The rotor is mounted in low friction bearings and yet the meter is operable within the normal accuracy specification for a conventional high-friction meter as a result of the presence of a constriction in the passageway upstream of the rotor. The passageway and constriction are of circular cross section and the constriction has a main portion which opens directly at the downstream end near the rotor, and a tapering upstream portion connecting with the passageway. The constriction affects flow at the rotor at turbulent but not at laminar velocities.

REFERENCES:
patent: 2709366 (1955-05-01), Potter
patent: 3201083 (1965-08-01), Schaus
patent: 3248945 (1966-05-01), Karlby
patent: 3972233 (1976-08-01), Pelt

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