A valve assembly mounted in a resealable/reclosable storage bag. The valve assembly includes a base and a valve element. The valve element includes a stem with a convex cap attached at one end and a valve gate attached at the opposite end. The stem extends into a hole in the base. The resilient quality...http://www.google.ca/patents/US6581641?utm_source=gb-gplus-sharePatent US6581641 - One-way valve for use with vacuum pump
