Evacuable container having one-way valve with filter element
US6575191B2 · kind B2 · utility
40Cited by
40References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2002 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Apr 30, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8122
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A one-way valve allows air to be drawn from a collapsible, flexible, air-tight bag using a vacuum source. When the vacuum source is removed, the one-way valve prevents air from re-entering the bag. A filter is placed on the valve body to prevent small particles from the bag from clogging the valve or the vacuum source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.