One-way valve with flapper for vacuum bag
US8074685B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2009 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Mar 3, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7898
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A one-way valve allows air to be drawn from a collapsible, flexible, airtight bag using a vacuum source. When the vacuum source is removed, the one-way valve prevents air from re-entering the bag. The valve assembly comprises a valve base attached to a bag wall and having an opening, a cap base coupled to the valve base, a flapper held in place by the valve base and cap base, and a cap connected to the cap base by a living hinge. When the cap is snapped onto the cap base after bag evacuation, the cap maintains the flapper in a position so that the opening in the valve base stays closed, preventing the admission of ambient air into the evacuated bag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.