One-way valve with flapper for vacuum bag

Details One-way valve with flapper for vacuum bag One-way valve with flapper for vacuum bag

2009-04-03

2011-12-13

Rivell, John (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C206S524800, C383S103000, C141S065000, C251S082000

Reexamination Certificate

active

08074685

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.

REFERENCES:
patent: 4776501 (1988-10-01), Ostrowsky
patent: 5332095 (1994-07-01), Wu
patent: 5954196 (1999-09-01), Lin
patent: 2004/0232368 (2004-11-01), Motonaka et al.
patent: 2005/0211319 (2005-09-01), Kobetsky
patent: 2007/0068841 (2007-03-01), Tanaka
patent: 2007/0095403 (2007-05-01), Su
patent: 2007/0241023 (2007-10-01), Ootsubo et al.
patent: 2009/0050512 (2009-02-01), Pham
patent: WO 2007/037081 (2007-05-01), None

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