Cap with valve for positive pressure
US4795053A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1988 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Apr 27, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S220/33
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A cap with valve for positive pressure comprises a cap body installed to an aperture of a container such as a fuel tank or a radiator of an automobile, a partition wall formed within the cap body and extending from an inner circumferential surface in radial direction and having a first fluid flowing hole, and a valve for positive pressure disposed at upper side of the partition wall. A support plate is disposed at lower side of the partition wall within the cap body and provided with a second fluid flowing hole, and an auxiliary valve chamber is formed between the partition wall and the support plate. Within the auxiliary valve chamber, a stopper valve having specific gravity larger than that of liquid within the container and a float having specific gravity of the combined body with the stopper valve smaller than that of the liquid within the container are arranged at lower side of the first fluid flowing hole and movable up and down. When the container is reversed in upper and lower positions, the stopper valve is moved by own weight towards the partition wall thereby the first fluid flowing hole is closed. Also when the liquid level within the container rises, both the stopper v…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.