Ventilation line opening/closing means of fuel tank
US5313978A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1993 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Aug 30, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86332
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An object of the invention is to improve a ventilation line opening/closing means of a fuel tank which interrupts a ventilation line from the fuel tank to a canister during fuel supply so as to restrict the fuel level when the tank is full, and which opens the ventilation line during traveling of a vehicle. This invention provides a ventilation line opening/closing means of a fuel tank, comprising a float valve provided in a ventilation line for introducing gas of the fuel tank into a canister so as to control ventilation, wherein a fuel receiving portion of return fuel including escape holes is integrally formed on a lower portion of a vent shut-off valve, so that the vent shut-off valve is opened by return fuel from the engine during operation of the engine, and that the vent shut-off valve is closed by the force of a spring during a stop of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.