Air flow measuring device
US8844342B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2012 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Apr 10, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6842
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An air flow measuring device includes a housing, a sensor, and a throttle that is provided on an outer wall surface of the housing. The throttle merges together a bypass-passing flow and an outside-passing flow, and guides the merged flow toward the downstream side with the merged flow narrowed. The throttle includes two raised portions and a cover that bridges between the two raised portions and is opposed to the outer wall surface of the housing. The cover includes an inner surface exposed to the throttle, and an outer surface exposed to outside of the throttle. A peripheral border of the cover includes an upstream edge which defines the outer surface on the upstream side. At least a region of the outer surface including the upstream edge is swollen more outwardly in a shape of a projecting curved surface further on the downstream side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.