Patent ID: 6663284
Filing Date: 2003-12-16
Classification: B65D,F16K

Abstract:
A pressure sensitive one-way valve to control the release of pressurized gas from a sealed container wherein the sealed container has at least one venting aperture therein, the valve comprising:(i) a first layer of flexibly resilient material having an upper surface and a lower surface, at least the periphery of said lower surface of said first layer adhered to the outer surface of the container with at least a portion of the interior of said lower surface of said first layer separable from the outer surface of the container, said separable portion of said lower surface of said first layer and the portion of the outer surface of the container adjacent thereto forming an expansion chamber therebetween, said expansion chamber in communication with said venting aperture through said container such that passage of gas through said venting aperture causes expansion of said expansion chamber, said expansion chamber having a gas release aperture extending therethrough permitting the release of gas from said expansion chamber; and, (ii) a second layer of flexibly resilient material at least partially covering said first layer with a portion of said second layer adhered to said first layer and a portion of said second layer separable from said first layer, said separable portion of said second layer and the portion of said first layer adjacent thereto forming a gas exiting passageway, said gas exiting passageway in communication with said gas release aperture extending through said expansion chamber, such that expansion of said expansion chamber exerts a lifting force upon said second layer causing said separable portion between said first and said second layers to diverge thereby opening said gas exiting passageway and permitting the flow of gas from the venting aperture in the container through said expansion chamber, through said gas release aperture extending through said expansion chamber, into said gas exiting passageway, and out of said valve into the environment.