Method for cryogenic treatment of Coriolis mass flow meter structures
US5073208A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1989 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Sep 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/844
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for increasing stability of a Coriolis mass flow meter by relieving residual and internal stress within the flow tube and related structures of the meter. The method including the steps of bending the flow tube in the desired form, fixing related flow tube structures onto the flow tube, clamping the flow tube so as to maintain the desired form during subsequent processes, annealing the flow tube, and cryogenically cooling the flow tube. An apparatus to be utilized along with the method of the present invention fixes the flow tube during the annealing and cryogenic cooling treatment processes to maintain the desired shape of the flow tube. The invention also contemplates the flow tube made in accordance with the method of the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.