The valve of the present invention is adapted for use with a pressurized aerosol dispensing container and comprises an axially movable, tubular valve body; a diaphragm integral with the valve body and urging it upwardly toward closure; and an annular elastomeric sealing gasket encompassing the valve body and overlying the diaphragm to provide an annular chamber therebetween when the valve is open. The valve body includes a cylindrical bore through it with a wall blocking the bore and separating the bore into an eduction passageway and a discharge passageway. The valve body also includes an inlet orifice in communication with the education passageway and an outlet orifice in communication with the discharge passageway. The chamber communicates the inlet orifice with the outlet orifice when the valve is open. The inlet and outlet orifices are vertically spaced from each other with the inlet orifice above the outlet orifice. The inner margin of the gasket normally sealingly occludes both of the orifices to close the valve. As the value moves toward closure, the vertical spacing between the inlet and outlet orifices provides occlusion of the inlet orifice before the outlet orifice.

2011-12-14

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