Restriction flowmeter

Details Restriction flowmeter Restriction flowmeter

2005-07-05

2005-07-05

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Volume or rate of flow

Using differential pressure

Reexamination Certificate

active

06912919

ABSTRACT:
A restriction flowmeter including a cylinder through whose interior a fluid to be measured flows and a pipe for forming a restriction structure penetrating the cylinder in a direction perpendicular to the central axis of the cylinder, the pipe having a diameter smaller than the inner diameter of the cylinder, characterized in that a first pressure measuring hole is formed on the most restricted cross section perpendicular to the flow direction and a second pressure measuring hole is formed on a wall of the cylinder located upstream which is away from the most restricted cross section by ½ or more of the inner diameter of the cylinder.

REFERENCES:
patent: 3802265 (1974-04-01), Wood
patent: 5365795 (1994-11-01), Brower, Jr.
patent: 5379650 (1995-01-01), Kofoed et al.
patent: 6164142 (2000-12-01), Dimeff
patent: 6312389 (2001-11-01), Kofoed et al.
patent: 32-6282 (1932-06-01), None
patent: 8-210887 (1996-08-01), None
patent: 10-253409 (1998-09-01), None

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