Measuring and testing – Volume or rate of flow – System
Patent
1992-10-26
1993-11-02
Hepperle, Stephen M.
Measuring and testing
Volume or rate of flow
System
1374542, 137503, 1375991, G01F 700, G05D 701
Patent
active
052575373
ABSTRACT:
A self-actuating throttle valve for use with fluid measurement apparatus such as a water meter. The valve includes a cylindrical body disposed within the outlet of the fluid measuring apparatus, fluid bypass openings formed in the body to enable fluid to flow through the body, and a piston disposed within the body. The piston is biased by a spring in a first position whereby the fluid may flow around the piston and body and through the bypass openings when the rate of fluid flow is below a predetermined amount. When the rate of fluid flow is above a predetermined amount, pressure from the fluid causes the piston to move to a second position whereby the piston covers the bypass openings by a predetermined amount to substantially reduce fluid flow. The throttle valve prevents damage to the fluid measurement apparatus when high fluid flow rates are encountered. The valve has particular application in the area of fire service water metering devices which include both a high flow rate measurement device (e.g. a turbine flow meter) and a low flow rate fluid metering device (e.g. a positive displacement water meter) having their inlets and outlets connected in parallel where the low flow rate metering device might be damaged if subject to too high a fluid flow rate.
REFERENCES:
patent: 13498 (1855-08-01), Russell
patent: 922578 (1909-05-01), Gries
patent: 3088481 (1963-05-01), Brueckner et al.
patent: 3850195 (1974-11-01), Olsson
patent: 4429571 (1984-02-01), Kullmann et al.
Gaudier Dale V.
Hepperle Stephen M.
Schlumberger Industries Inc.
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