Vehicle tank vapor vent valve assembly
US4917157A · kind A · utility
31Cited by
18References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1989 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Feb 27, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86332
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A tank vapor vent valve assembly uses a spring loaded sealing flapper door located below a normally open float chamber. The flapper door spring is specifically designed to open when the tank pressure falls, allowing make up air to pull the flapper door down and draw in make up air through the canister inlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.