Mass flow operating by the coriolis principle
US5020380A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 1990 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Jan 8, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/8495
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The mass flow meter operating by the Coriolis principle comprises a mechanical oscillating system having at least one measuring tube and an optical sensor means for sensing the mechanical oscillations of the oscillating system. The optical sensor means includes a light transmitter, a light receiver and an optical waveguide means having two quartz or sapphire rods which transmit the light of the light transmitter to the light receiver, the transmitted light flux being influenced by the oscillations of the mechanical oscillating system. To increase the mechanical strength and to protect the quartz or sapphire rods against temperature influences and against chemically aggressive media, the quartz or sapphire rods are embedded in ceramic material or glass which, preferably, is further surrounded by a metal cladding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.