Fuel cap with high sealing properties
US7484636B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2004 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | Jan 8, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S220/33
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A fuel cap comprising a closure unit adapted to be fitted into an opening of a filler neck having ridges formed on its inner side face intermittently in the circumferential direction, so that it may be secured to the filler neck by engaging with the ridges during a turning operation. The closure unit includes a closure body, a seal ring, a turning control sleeve, a sliding sleeve, a base and a coil spring. The amount of the spacing formed between the lower end of the sliding sleeve and the base is set smaller than an amount of the downward sliding of the sliding sleeve, which is caused when the engagement protrusions formed on the outer side face of the sliding sleeve slip into lower face of the ridges formed on the inner side face of the filler neck.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.