Check valve with reduced opening speed
US9347573B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2014 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Sep 12, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/785
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A check valve for a housing with adjacent first and second apertures separated by a septum comprises a hinge pin, a first flapper, and a second flapper. The hinge pin is located downstream of the septum. The first flapper is anchored via the hinge pin, and is rotatable about the hinge pin to block the first aperture when in a closed position. The second flapper is anchored via the hinge pin, and comprises a primary flapper section and a counterbalance section. The primary flapper section is rotatable about the hinge pin to block the second aperture when in a closed position. The counterbalance section extends upstream from and substantially parallel to the primary flapper section, towards the first aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.