Pall Corporation

John E Ryan, Jr

John D Miller

Mark F Hurwitz

Thomas J Fendya

Clayton L Reed

Bruce R Germain

Edward M Musto

Horst Randhahn

Hartmut Vogelmann

A dynamic filter system comprises a dynamic filter assembly including one or more filter elements and one or more members disposed within a housing. The filter elements and the members are interleaved and arranged to rotate with respect to one another.

Dynamic filter system

The filter arrangement includes first end cap, second end cap, a cylindrical filter pack that has first and second ends and axially extending pleats disposed between the first and second ends, and a cylindrical non-perforated housing body that is disposed between the first and second end caps and about the cylindrical filter pack.

Filter arrangement including a non-perforated housing and an axially

The filter assembly includes a filter element having an end surface and an end cap connected to the end surface by spin welding. The end cap has an outer diameter that need be no larger than the outer diameter of the end surface of the filter element. Prior to spin welding, the end cap may have a surface with a sacrificial ridge extending from the surface. The end cap is spin welded to the end surface of the filter element by rotating the filter element and the end cap with respect to one another while contacting the sacrificial ridge with the end surface of the filter element, melting the sacrificial ridge by the contact with the filter element to form a molten plastic, and joining the surface of the end cap to the end surface of the filter element with the molten plastic. Also disclosed is a method of spin welding a filter pack to an end cap without a sacrificial ridge.

Filter assembly with a spin welded end cap

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Cortland, NY, United States of America

John E Ryan, Jr