Vortex flow meter frequency adjustment
US4437349A · kind A · utility
14Cited by
8References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1982 |
| Grant date | Mar 20, 1984 |
| Priority date | — |
| Expiry date | Sep 16, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/3209
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An air flow meter (10) has an air flow channel (11) with a vortex generator or strut (13). The cross sectional area of the air flow adjacent the vortex generator is varied to change the flow velocity and hence to change the vortex frequency. The cross sectional area can be changed by rotating strut (13), moving a flexible plate (24) in a sidewall (22), or moving a vortex generator (33) to a region of different cross sectional area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.