Flowmeter apparatus

Measuring and testing – Volume or rate of flow – Using differential pressure

Reexamination Certificate

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Reexamination Certificate

active

06874374

ABSTRACT:
A flowmeter is described which has a retrievable housing conduit which is locatable within a conduit or pipe and which seals against the pipe so that fluid only flows through the housing conduit, and a flow restriction is created within the housing conduit to create a Venturi when in use. At least two spaced pressure measuring stations are provided along the housing conduit, one of the stations located at an unrestricted flow location, the other at a restricted flow location, whereby pressures measured at these stations can be used to calculate fluid flow rates. Embodiments of the invention are described.

REFERENCES:
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patent: 454560 (1991-10-01), None
patent: 749004 (1996-12-01), None
patent: 2186981 (1987-08-01), None
patent: 2261519 (1993-05-01), None
patent: 9416295 (1994-07-01), None
patent: 9725594 (1997-07-01), None

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