Pressure relief valve
A pressure relief valve that is mountable to protect packaging so as to vent pressurized gases contained within the packaging. The present invention also pertains to a pressure relief valve which includes at least one passageway defined by at least one inner rail and which is in communication with an aperture.
1. A pressure relief valve comprising: a self-supporting base mountable to a support surface and having a first layer defining an inner aperture; an inner rail member having a different configuration than said self-supporting base, wherein said inner rail member is positioned on the self-supporting base and connected by an adhesive layer to said self-supporting base: a flexible film connected with adhesive to the inner rail member, the flexible film being disposed on the periphery of the valve; said inner rail member defining a passageway between the flexible film and the base recessed from said inner aperture and in communication with said inner aperture; said flexible film moveable between an open and closed position; in said open position said flexible film is located above said aperture and extends outwardly beyond said base; and in said closed position, said film covers said aperture, the inner rail member has a sufficient thickness to permit said flexible film to move from said open position wherein said flexible film does not contact said self-supporting base and to said closed position wherein said flexible film does contact said self-supporting base.
2. The device of claim 1 wherein said flexible film is curved in shape when in said open position.
3. The device of claim 1 wherein said flexible film comprises an elastomeric material.
4. The device of claim 1 wherein said film balloons outwardly when in said open position.
5. The pressure relief valve of claim 1 , wherein said inner rail member comprises a pair of strips located along an outer edge of the base.
6. The pressure relief valve of claim 5 , wherein said inner rail member forms a rectangular passage that connects to the inner aperture.
7. The pressure relief valve of claim 1 , wherein the base comprises Polyethylene Terephthalate.
8. The pressure relief valve of claim 7 , wherein the inner rail member has a uniform thickness between 1–10 millimeters.