Tank vent control apparatus
US6003499A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1999 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Jan 7, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86332
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus is provided for controlling venting of vapor to and from a fuel tank. The apparatus includes a housing and first and second valves positioned in the housing. The first valve controls the primary flow of vapors from the fuel tank and includes an aperture permitting an auxiliary flow of vapor to and from the fuel tank. The second valve controls the auxiliary flow of vapor to the fuel tank and includes first and second apertures permitting vapor to flow to the fuel tank. The second valve moves between a first position permitting vapor to flow through the first aperture and a second position permitting vapor to flow through the first and second apertures at a greater flow rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.