초록 ▼

An air filter element having end caps molded of foam material, and in which one of the foam end caps also employs the foam material as a radial seal gasket. Tubular inner and outer liners support a tubular filter element. The first ends are molded in a closed urethane end cap sealing one end of the

An air filter element having end caps molded of foam material, and in which one of the foam end caps also employs the foam material as a radial seal gasket. Tubular inner and outer liners support a tubular filter element. The first ends are molded in a closed urethane end cap sealing one end of the filter element. The other end is molded to provide an open end cap in the form of an annular ring which encases the filter element and the liners, and provides a radial seal gasket. A substantially rigid plastic ring has a base embedded in the open end cap annular ring, and an upstanding flange which carries the radial seal gasket. The ring closely fits within the inner liner, and the fit between the inner liner and ring provides a fluid restriction such that when the foamed urethane material forms on the annular flange, it carries up one side of the upstanding flange to form the ring, but is restrained from passing to the other side to leave an isolating gap between the other surface of the flange and the inner liner.

대표청구항 ▼

1. An air filter element comprising in combination:a tubular filter media having first and second ends; tubular inner and outer liners supporting the filter media and also having first and second ends; the filter element having a closed end cap formed of molded foam material encapsulating the first

1. An air filter element comprising in combination:a tubular filter media having first and second ends; tubular inner and outer liners supporting the filter media and also having first and second ends; the filter element having a closed end cap formed of molded foam material encapsulating the first ends of the liners and the filter media; an insert ring of substantially stiff plastic material and having: a cylindrical flange having an inner surface positioned to support a gasket; a sealing portion supporting the cylindrical flange and sized to snugly fit within the inner liner to form a fluid restriction; and a base portion supporting the sealing portion; the insert ring being fit within the second end of the inner liner with the sealing portion snugly engaging the inner liner; an open end cap formed of molded compressible foam material of sufficient resilience to serve as a gasket, the foam material encompassing the base portion of the insert ring, the second ends of the liners and filter media and the inner surface of the cylindrical flange, the shape and dimension of said foam material on the inner surface being configured to form a sealing gasket as part of the open end cap; and the fluid restriction restraining the foam material from filling the area between the cylindrical flange and the inner liner.