Vented fuel tank cap
US5242072A · kind A · utility
12Cited by
6References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1993 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Jan 29, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0874
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A cap for a fill pipe of a fluid container, such as a gas tank, is provided. It has a vent hole which is normally held unsealed by the weight of a ball which impinges against and thereby tilts a spring loaded pin carrying an O-ring. When the cap tips away from the vertical by more than a pre-selected angle, the ball rolls away from the pin and the spring urges the pin to an orientation where the O-ring seals the hole. When the container is tipped beyond the pre-selected angle, should the internal tank pressure exceed a pre-determined level, the pressure overcomes the force of the spring allowing relief venting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.