Two stage fuel tank vent valve
US6719000B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2002 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Feb 5, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/3099
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A two-stage vent valve 10 is incorporated into a vehicle fuel distribution system. The vent valve 10 is mounted to the top of a fuel tank of a motor vehicle in a vertically orientated position, so that a fluid inlet is in communication with the interior open air volume of the fuel tank, and an outlet is in communication with the exterior of the tank. The vent valve 10 utilizes a two-stage valve mechanism to allow vapor to escape from the fuel tank, while preventing the leakage of liquid fuel during such operating conditions where the vehicle has tilted due to a small downgrade, sloshing of fuel in a full or near-full tank, or the event of a roll-over.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.