Mass flowmeter
US4031758A · kind A · utility
Inventor
Key dates
| Filing date | Dec 29, 1975 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Dec 29, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/785
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure-difference type mass flowmeter with constant volumetric recirculation effected by a pump, with an annular flow path having four junctions each having a spur path. One pair of the alternate spur paths serve as inlet and outlet of the fluid flow to be measured, while the other pair of the alternate spur paths are connected to the recirculation pump. Four sections of the annular flow path defined by the four junctions are each provided with static fluid pressure sensing point, and a transducer gives a readout of difference in average static pressures of one pair of the alternate sensing points and of the other pair of the alternate sensing points. This readout is linearly proportional to the fluid mass flow rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.