Check valves for fuel cartridges
US8196894B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2008 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Jan 12, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7882
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In accordance with different embodiments of the present invention, duckbill check valve 10, having an orifice 11, and conical check valve 12, having an orifice 13, are responsive to the differential pressure of fluid F as it flows between inlet 14 and outlet 16. In an innovative aspect of the invention, orifice 11 and orifice 13 each have a variable effective diameter. In one embodiment, the duckbill check valve 10 and conical check valve 12 have a conical end that is aligned with the direction of fluid flow. In another embodiment, the duckbill check valve 10 can have a conical end that faces the direction of fluid flow. A pin may traverse orifice 11 or 13.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.