Gas tank cap with roll-over valving
US4000828A · kind A · utility
39Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1975 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Jun 2, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7777
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A cap for closing the filler neck of a vehicle fuel tank, the cap comprising a valve housing, a pressure-vacuum valve assembly disposed in the housing to vent the tank when the pressure in the filler neck drops below a predetermined subatmospheric level and when the pressure in the filler neck exceeds a first predetermined superatmospheric level, a roll-over valve for closing the pressure-vacuum valve assembly when the filler neck is tilted, and an excessive pressure valve for bypassing the pressure-vacuum valve when the pressure in the filler neck exceeds a second and greater predetermined superatmospheric level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.