Vent valve and fuel pump module
US6311675A · kind A · utility
30Cited by
10References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2001 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Jan 5, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/3099
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A high flow rate, two stage fuel vapor vent valve assembly utilizing two float valves that provide a progressive closing of a vapor outlet to control the venting of fuel vapors from a fuel tank and the addition of liquid fuel to the tank. A first float closes a portion of the vapor outlet in response to liquid fuel at a first level relative to the valve. A second float closes the remainder of the vapor outlet in response to liquid fuel at a second level higher than the first level. One or more separate baffles are constructed and arranged to prevent the escape of liquid fuel through the vapor outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.