Ball valve with flow-rate gauge incorporated directly in the...

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

Reexamination Certificate

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C073S861520

Reexamination Certificate

active

06923074

ABSTRACT:
A fluid-flow measuring ball valve includes a replaceable ball within a housing. The replaceable ball includes a flow restriction calibrated to the characteristics of the fluid. Pressure ports on either side of the ball provide for obtaining pressure readings which can be used to determine fluid flow.

REFERENCES:
patent: 3209779 (1965-10-01), McGowen, Jr.
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patent: 3826281 (1974-07-01), Clark
patent: 4402485 (1983-09-01), Fagerlund
patent: 4610273 (1986-09-01), Bey
patent: 5205533 (1993-04-01), Berchem
patent: 5209258 (1993-05-01), Sharp et al.
patent: 5533549 (1996-07-01), Sherman
patent: 5551467 (1996-09-01), Booth et al.
patent: 5593135 (1997-01-01), Lester et al.
patent: 5937890 (1999-08-01), Marandi
patent: 6161350 (2000-12-01), Espinosa
patent: 6491056 (2002-12-01), Gibb

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