Fan one way air valve
US6554698B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2000 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Dec 5, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7885
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A valve for a vent. The valve includes an inner leaf having a closed state which covers the vent and blocks gas flow through the vent in a first direction, and an open state which opens the vent and allows gas flow through the vent in a second direction. The valve includes an outer leaf opposing the inner leaf. A method for controlling gas flow through a vent. The method includes the steps of moving an inner leaf and an outer leaf opposing the inner leaf on the vent from a closed state which covers the vent and blocks gas flow through the vent in a first direction to an open state which opens the vent and allows gas flow through the vent in a second direction with gas flow moving in the second direction through the vent. Then there is the step of stopping the gas flow in the second direction allowing the inner leaf and the outer leaf to each move to the closed state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.