Flow meter for a positive displacement pump

Details Flow meter for a positive displacement pump Flow meter for a positive displacement pump

1988-09-09

1990-03-06

Stout, Donald E.

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

417 40, 417 44, 137391, F04B 4900

Patent

active

049061658

ABSTRACT:
A flow meter for use with a fluid source includes a chamber of known volume, and level sensors for detecting fluid boundaries at either end of the known volume. A valve between the fluid source and chamber is opened at a defined time until fluid level within the chamber rises above the upper sensor, whereupon the valve is closed. As the fluid level falls past the upper sensor a second time level is measured, with both time intervals being terminated as the level falls to the lower level sensor. The average flow rate as the fluid falls between the two sensors is calculated by a computer, and the total volume is then calculated using the longer measured time interval. Flow rates over long time periods can be accurately measured.

REFERENCES:
patent: 2405479 (1946-08-01), Whitlock
patent: 2882724 (1959-04-01), Smith
patent: 3189036 (1965-06-01), Hebard
patent: 4186419 (1980-01-01), Sims

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