Air admittance valve
US7395835B1 · kind B1 · utility
8Cited by
95References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 16, 2005 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Jan 14, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8122
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In some embodiments, an air admittance valve includes a base, a screen plate and a diaphragm engageable with the screen plate. The diaphragm may include a first center disk having a stem and a membrane coupled to the first center disk. The membrane may have a continuous material sized to extend beyond a perimeter of the first center disk, be formed of a material more pliable than the first center disk and be adapted to be coupled to the first center disk through the center disk stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.