Gas flow metering
US4484479A · kind A · utility
Inventor
Key dates
| Filing date | Apr 5, 1978 |
| Grant date | Nov 27, 1984 |
| Priority date | — |
| Expiry date | Apr 5, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Gas flow metering using a capacitance measurement and comprising a taut elastomeric membrane, preferably tubular in form, which expands or contracts as a function of flow rate past it to an extent determined by Bernouilli's principle. The thus changing distance between this membrane and one or more external electrodes measured by capacitance change or other means is correlatable with the instantaneous flow rate and such measurement can be made essentially without regard to entrained solids or liquids in the gas flow, phase and temperature changes (moderate) within the gas flow or mixture or changing composition therein and with rapid response and low back pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.