Measuring and testing – Volume or rate of flow – Mass flow by imparting angular or transverse momentum to the...
Patent
1987-07-27
1989-05-16
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Mass flow by imparting angular or transverse momentum to the...
G01F 184
Patent
active
048298328
ABSTRACT:
A flowmeter comprises a flow passage provided by a tubing including a first section extending from one anchored extremity; a second section extending from the other anchored extremity in a direction genrally opposite to the first section and a looped midsection connecting the two over-hanging extremities of the first and second sections; an electromagnetic drive vibrating the first and second sections of the tubing relative to one another; and two motion detectors respectively measuring the motions of the two over-hanging extremities of the first and second sections relative to the two anchored extremities of the tubing, respectively, wherein the mass flow rate through the tubing is determined from the difference between the two motions respectively measured by the two motion detectors. Another embodiment of the present invention includes a first tubing with one extremity connected to one port by a flexible coupling and the other extremity connected to the other port rigidly, and a second tubing with one extremity rigidly connected to one port and the other extemity connected to the other port by a flexible coupling; an electromagnetic drive vibrating the first and second tubings relative to one another; and two motion detectors respectively measuring the relative motions between the two tubings at the two extremities thereof. The mass flow rate through the two tubings are determined from the difference in the two motions respectively measured by the two motion detectors.
REFERENCES:
patent: 4622858 (1986-11-01), Mizerak
patent: 4660421 (1987-04-01), Dahlin et al.
patent: 4730501 (1988-03-01), Levien
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