A vacuum apparatus for easily forming a vacuum in any bottle, container or the like and for providing a stable sealing. A lower cylindrical member together with a disc member forms a space portion in which a vacuum or an atmospheric pressure is applied, and the lower portion of an upper cylindrical member...http://www.google.es/patents/US6375024?utm_source=gb-gplus-sharePatente US6375024 - Vacuum apparatus for forming a vacuum in a container
Vacuum apparatus for forming a vacuum in a container
