Check valve of fuel tank
US5887615A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Sep 22, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7902
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A check valve using a valve element (2) which is so constructed that the valve element comprises three members: a cover (4); an annular packing (5) and a pressing plate (6), the pressing plate (6) is provided with a snap fit claw (7), a flexible flange (12) pressed to the peripheral edge of a valve seat (11) when the valve element (2) is put in the valve closing state is formed on the outer periphery of the annular packing (5), a peripheral stepped part (13) to which the outer periphery of the pressing plate (6) is fitted is formed on the inner periphery thereof, the cover (4) is provided with a fitting hole (8) for the snap fit claw (7) and a peripheral wall (14) formed on the outer periphery thereof, to which the main body part of the annular packing (5) except the flange (12) is fitted, the annular packing (5) is fitted to the cover (4), the pressing plate (6) is fitted to the annular packing (5), and the snap fit claw (7) is fitted in the fitting hole (8), thereby clamping the annular packing (5) with the cover (4) and the pressing plate (6), in which while the convenience of assembling is kept, the sealing performance in the valve closing state is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.