Low leakage butterfly damper
US6557826B2 · kind B2 · utility
14Cited by
11References
2Claims
0Family size
Inventors
Key dates
| Filing date | Sep 17, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Sep 17, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87531
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved butterfly damper for air delivery systems, having multiple rotatable blades, and a centrally located blade rotating, or actuation means. Each blade comprises an offset, or displaced portion to allow concealment of the actuation mechanism upon closure. This offset portion allows the blades, upon closure, to meet and form a seal around the least complex portion of the actuation mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.