Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1982-11-29
1984-12-25
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Using differential pressure
G01F 122
Patent
active
044896140
ABSTRACT:
A flowmeter for measuring the flow rate of a liquid or gaseous media is disclosed. The flowmeter comprises a body portion including an inlet and an outlet. A fluid path extends between the inlet and the outlet. A core tube is disposed vertically within the body portion and a recessed groove is defined by the core tube. The groove extends longitudinally relative to the core tube and a first piston is movably disposed within the core tube and disposed adjacent the groove. A cross sectional area of the fluid path is defined by the groove and the first piston, the cross sectional area of the fluid path being variably dependent upon the longitudinal disposition of the first piston relative to the groove. A cover tube is disposed adjacent the body portion and in fluid communication with the fluid path. A second piston is disposed within the cover tube and is connected to the first piston by a connecting means enabling the first and second pistons to move in unison. A first and a second side of the second piston are immersed in a static fluid enabling controlled damping of the first piston and an indicator cooperating with the second piston indicates the position thereof relative to the cover tube. An embodiment is disclosed for measuring gaseous flow in which the indicator is operative within a range dependent upon the buoyancy of the connecting means immersed in the static fluid.
REFERENCES:
patent: 1238498 (1917-08-01), Dawley
patent: 2091792 (1937-08-01), Nieseman
patent: 2558356 (1951-06-01), Greene
patent: 3253459 (1966-05-01), Sorenson et al.
patent: 3408865 (1968-11-01), Chenault
deFasselle Craig R.
deFasselle Robert J.
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