Evacuable container having one-way valve with filter element
US6408872B1 · kind B1 · utility
53Cited by
39References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 1999 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | May 12, 2019 |
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.