Air flow generating device
US11466674B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2021 |
| Grant date | Oct 11, 2022 |
| Priority date | — |
| Expiry date | Apr 8, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K7/206
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air flow generating device includes an enclosing wall, a frame sheet, a cover film, and a vibrating part. The frame sheet is disposed inside an air flow passage formed by the enclosing wall and closely contacts the air flow passage by its periphery. The cover film includes a central connection portion fixed to a central portion of the frame sheet, and a plurality of movable cover portions connected to the central connection portion. The cover film is between the frame sheet and an outlet of the air flow passage. The movable cover portions selectively cover a plurality of through holes of the frame sheet. The vibrating part is fixed on the frame sheet. When the vibrating part vibrates, the central portion and the central connection portion move together with the vibrating part so that the movable cover portions seal the through holes or move relative to the through holes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.