Vibratory transducer for coriolis mass flowmeter or a...

Details Vibratory transducer for coriolis mass flowmeter or a... Vibratory transducer for coriolis mass flowmeter or a...

2007-05-08

2007-05-08

Patel, Harshad (Department: 2855)

Measuring and testing

Volume or rate of flow

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

Reexamination Certificate

active

11415176

ABSTRACT:
A transducer has at least one at least temporarily vibrating flow tube of predeterminable lumen for conducting a fluid. The flow tube communicates with a connected pipe via an inlet tube section (103), ending in an inlet end, and an outlet tube section, ending in an outlet end, and in operation performs flexural vibrations about an axis of vibration joining the inlet and outlet ends. The flow tube has at least one arcuate tube section of predeterminable three-dimensional shape which adjoins a straight tube segment on the inlet side and a straight tube segment on the outlet side. At least one stiffening element is fixed directly on or in close proximity to the arcuate tube segment to stabilize the three-dimensional shape. By means of the at least one stiffening element, the cross sensitivity of the transducer is greatly reduced, so that cross talks from pressure to mass flow signals are minimized and the accuracy of the transducer is improved.

REFERENCES:
patent: 4711132 (1987-12-01), Dahlin
patent: 4831885 (1989-05-01), Dahlin
patent: 5370002 (1994-12-01), Normen
patent: 5540106 (1996-07-01), Lew
patent: 5576500 (1996-11-01), Cage
patent: 5616868 (1997-04-01), Hagenmeyer
patent: 5731527 (1998-03-01), Van Cleve
patent: 6711958 (2004-03-01), Bitto
patent: 6920798 (2005-07-01), Wenger et al.
patent: 7062977 (2006-06-01), Wenger et al.
patent: WO 92/19940 (1992-11-01), None

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