Differential pressure flow sensor
US9157774B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 2012 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Dec 12, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/583
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A differential pressure flow sensor that includes a plurality of channels divided into multiple sets of channels having different characteristics. Primary channels establish fluid communication between an inlet and an outlet of the flow sensor. Secondary channels establish fluid communication between the inlet and a first pressure port, but not the outlet. Tertiary channels establish fluid communication between the outlet and a second pressure port, but not the inlet. Signals generated at the first and second pressure port are used to determine a rate of flow through of gas through the sensor. Due to the structural features of the device, the phase delay of individual oscillatory flow components compared to corresponding oscillatory pressure components remains substantially constant across a wide range of flow rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.