Fluid flow meter

Details Fluid flow meter Fluid flow meter

1981-09-04

1984-03-06

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Using differential pressure

G01F 122

Patent

active

044346700

ABSTRACT:
A fluid flow meter is provided for indicating the fluid flow rate in two or more predetermined flow ranges. The flow meter comprises a housing having an inlet open to a cylindrical inlet chamber and an outlet open to a cylindrical outlet chamber. At least two cross passages in the housing interconnect the inlet and outlet chambers at axially spaced positions. A piston is slidably mounted within the inlet chamber and sequentially opens the cross passages to the inlet chamber in dependence upon the fluid flow rate into the housing inlet. The position of the piston is visible exteriorly of the housing and its position within the inlet chamber provides a visual signal of the fluid flow rate through the flow meter. The piston can be spherical, cylindrical, etc. in shape.

REFERENCES:
patent: 522995 (1894-07-01), Maxim
patent: 1238498 (1917-08-01), Dawley
patent: 2003474 (1935-06-01), Schweitzer
patent: 3224270 (1965-12-01), Karol et al.
patent: 3693441 (1972-09-01), Obstfelder
patent: 3859854 (1975-01-01), Dye et al.

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