Straight double-tube type coriolis flow meter
US6336369B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1999 |
| Grant date | Jan 8, 2002 |
| Priority date | — |
| Expiry date | Sep 22, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/849
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A double-tube type Coriolis flow meter is provided for measuring mass flow. The flow meter includes a straight flow tube (4) through which the fluid being measured flows, a hollow outer tube (5) secured at both ends thereof to act as a counterbalance, a drive unit (7), and a pair of sensors. The flow tube (4) is caused to vibrate by the drive unit (7) so that the mass flow of the fluid is measured by detecting a phase difference proportional to Coriolis force acting on the flow tube (4) by the sensors. Sheet members (coupling plates 6) secure the flow tube (4) to both ends of the outer tube (5) and integrally form the coupling plate (6) with tube-assembly supporting leaf springs (14) in the double-tube type Coriolis flow meter. By connecting the flow tube to the outer tube via the sheet members in this manner, stresses produced between the tubes are absorbed and a uniform temperature distribution is maintained in the outer tube and manufacturing costs are reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.