Scott E Spafford

US Patent:

51731860, Dec 22, 1992

Filed:

Mar 28, 1991

Appl. No.:

7/676828

Inventors:

Scott E. Spafford - Algonquin IL
Robert M. Holden - Addison IL

Assignee:

Allied Filter Engineering, Inc. - Bensenville IL

International Classification:

B01D 2708

US Classification:

210455

Abstract:

A coreless filter cartridge, and apparatus for adapting a filter housing to support such coreless filter cartridges. A coreless filter cartridge has an elongate array of filtering material which defines an interior cavity. The array is surrounded by a sheath of perforated paper. The ends of the array and sheath are embedded into polyurethane end-caps. The filter housing is adapted to accept coreless filter cartridges by adding a rigid, perforated standpipe that uses a bushing to fit over a housing fluid egress spud. The coreless filter cartridge is placed over the standpipe and secured in place by a retaining spider or by the housing cover, which exerts bias via a compression spring and compression cup. Gaskets on each end-cap prevent fluid by-pass and a stand-off cup is located near the base of the standpipe to provide a surface against which the end-cap gasket can seat.