Cap with valve
US4666056A · kind A · utility
24Cited by
5References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 25, 1986 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Apr 25, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K15/0406
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A cap with valve of the invention is provided with a negative pressure valve at a fluid entering flow path in a closure installed to an aperture of a container, so that fluid flows into the container from outside when pressure in the container is decreased, thereby decrease of the pressure in the container is prevented. A filter cloth is arranged to the fluid entering flow path at the front side of the negative pressure valve and swells to the fluid entering side so as to cover the flow path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.