Fuel filler cap with overpressure relief
US4892216A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1989 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Jan 13, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S220/33
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An improved fuel filler cap for fuel tanks of motor vehicles is disclosed. A cap body member is attached by an actuator rod to an anchor disc, which mates with a tank adapter. When an actuator handle is rotated from a free to a locked position, the anchor disc is engaged with the adapter and drawn towards the underside of the cap, thus insuring a good seal between the cap and the adapter. A first spring disposed between the actuator rod and anchor disc limits the pressure in the tank, such that if an overpressure occurs, the cap is permitted to lift entirely off the adapter, quickly relieving the overpressure. A second spring is preferably provided to positively urge the anchor disc away from the cap upon release of the handle, providing superior operating feel and over-center 10 locking of the handle. The outer surface of the cap is configured so that impacts are absorbed by the adapter, preventing leakage of the cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.