Vortex flow meter

Details Vortex flow meter Vortex flow meter

2006-12-28

2008-08-12

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

C073S861180, C073S861210

Reexamination Certificate

active

07409872

ABSTRACT:
It is an object to provide a vortex flow meter with less measurement errors caused by a temperature change, a pressure change, and a mechanical vibration, and capable of performing a precise measurement regardless of conditions, in addition, to provide a vortex flow meter capable of sufficiently preventing corrosive chemicals that is a fluid to be measured from leaking from a measurement pipe line due to corrosion.A vortex generator that generates the Karman vortex and a measurement pipe line in which a holder body housing a detecting element that detects an alternating force of the Karman vortex is disposed are made of a material having a small coefficient of linear thermal expansion such as a quartz glass, and the vortex generator and the holder body are fixed to the measurement pipe line by welding in an integrating manner.

REFERENCES:
patent: 3645132 (1972-02-01), Rasmussen
patent: 4418568 (1983-12-01), Surman
patent: 4449401 (1984-05-01), Kaiser et al.
patent: 6276218 (2001-08-01), Waers
patent: 6412353 (2002-07-01), Kleven et al.
patent: 6615673 (2003-09-01), Cullie
patent: 1-107113 (1989-04-01), None
patent: 2000-321102 (2000-11-01), None

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