Patent ID: 6254104
Filing Date: 2001-07-03
Classification: B65D,F16J,Y10S

Abstract:
In an aerosol valve having a hollow valve stem, a valve stem body, a valve housing surrounding the valve stem body, an intermediate portion between the valve stem and the valve stem body having at least one orifice communicating the interior of the hollow valve stem and the interior of the valve housing and a valve stem gasket having a central aperture encircling and sealing all orifices in the intermediate portion, the intermediate portion being capable of moving to expose at least one orifice in the intermediate portion from contact with the valve stem casket and thereby open the valve, the improvement comprising the valve stem gasket having plural zones of varying durometer, the zone nearest the central aperture and sealing against the orifice in the intermediate portion having a lower durometer relative to the durometer of the zone further radially outward from the aperture.