Positive displacement piston flow meter with internal valve

Details Positive displacement piston flow meter with internal valve Positive displacement piston flow meter with internal valve

1993-12-17

1995-04-25

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Mass flow by imparting angular or transverse momentum to the...

73248, G01F 300

Patent

active

054088860

ABSTRACT:
A piston flow meter for measuring gas flow through the flow meter comprising a hollow precision bore flowtube in a vertical orientation, with a movable piston containing a valve assembly for movement in concert with the piston between opposite ends of the flowtube. The valve assembly contains a latching mechanism, preferably a magnetic latch, to provide a positive seal across the piston. The magnetic latch is opened when the piston strikes a spring-loaded stop at the top end of the piston stroke, and is closed at the bottom end of the piston stroke.

REFERENCES:
patent: 1618206 (1927-02-01), Lamb
patent: 4152922 (1983-11-01), Francisco, Jr.
patent: 4372147 (1983-02-01), Waugh et al.
patent: 4481805 (1984-11-01), Dobesh
patent: 4549426 (1985-10-01), Erickson
patent: 4762004 (1988-08-01), Lalin et al.
patent: 4794785 (1989-01-01), Cohrs et al.
patent: 5052211 (1991-10-01), Cohrs et al.
patent: 5209114 (1993-05-01), Lalin
Webster's Third New World Dictionary, 1964; p. 893.

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