Gas cap with clamp-in roll-over valve
US3985260A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1975 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Sep 26, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0874
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pressure-vacuum valved cap for a vehicle fuel tank having an upwardly extending filler neck formed with a peripherally extending, upwardly facing sealing lip or sealing surface concentric with the longitudinal axis of the neck, the cap comprising a cover, a valve body providing a centrally disposed passageway extending axially therethrough concentric with and in communication with the filler neck, the valve body being connected to the cover to extend downwardly into the filler neck, a seal provided between the valve body and the lip of the filler neck, and a pressure-vacuum valve assembly disposed in the passageway to normalize the pressure in the fuel tank. The improvement comprises a rubber-like insert having a concentric opening extending axially therethrough, an upper portion and a lower portion. The insert is held against the valve body so that the insert upper portion engages and seals against the valve body about the vent opening which is in communication with the passageway. The insert lower portion provides a concentric, axially downwardly facing valve seat, and the cap includes a ball held for movement into closing engagement with the valve seat to close the passageway …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.