Precision Valve Corporation

Hans Hafner

Timothy O'Toole

An improved valve stem gasket comprising a flat-shaped gasket with a central aperture wherein the durometer of the gasket varies from a relatively low hardness value in the inner portion of the gasket extending radially outward from the central aperture to a relatively higher hardness value at the radially outer portion of the gasket whereat the gasket will be contacted by the upper wall portion of the valve housing. In a preferred form of the gasket, the variation in durometer value will be gradually varied from the inner portion of the gasket to the radially outer portion of the gasket.

Gasket for an aerosol valve stem

A multi-layer gasket for providing a seal between a mounting cup and a container comprising a middle layer of rigid plastic material and inner and outer layers of softer plastic material. The middle layer supports the inner and outer layers, which provide sealing surfaces with the mounting cup and the container bead. A gasketed mounting cup comprising a panel, a skirt integral with and depending from the periphery of the panel, wherein the skirt is outwardly flared to form an annular channel for receiving a container bead that defines the container opening and a multi-layer gasket positioned in the channel portion of the mounting cup, which gasket comprises a middle layer of rigid plastic material, an inner layer of soft plastic material adjacent the channel of the mounting cup and an outer layer of soft plastic material for engaging the container bead. The middle layer is preferably high density polyethylene or polypropylene and the inner and outer layers are preferably linear low density polyethylene. A layer of thermally activated adhesive can be placed adjacent the inner layer.

Growing community of inventors

Yonkers, NY, United States of America

Hans Hafner