Frank A Janezich

US Patent:

42433975, Jan 6, 1981

Filed:

Jun 27, 1979

Appl. No.:

6/052552

Inventors:

Joseph C. Tokar - Apple Valley MN
Frank A. Janezich - Richfield MN

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B01D 5000

US Classification:

55487

Abstract:

An improved filter element assembly for use in an air cleaner on an internal combustion engine comprises a perforated liner. A replaceable filter element comprising a pleated filter medium is releasably coupled to the liner. A safety sleeve assembly is interposed between the filter medium and the liner. An outer liner surrounds the filter medium and exerts a radially inward force thereon to bias the pleats into engagement with the liner. The filter element assembly can be reconditioned when the filter medium becomes used with a replacement kit which includes a new filter element, safety sleeve assembly, and outer liner. The used filter element assembly is disassembled and the worn components thereof replaced with the new components of the kit. The filter medium is expandable from a collapsed cylindrical form in which the filter element is shipped to an expanded conical form for use during filtering operations.

US Patent:

42115434, Jul 8, 1980

Filed:

Apr 24, 1978

Appl. No.:

5/898906

Inventors:

Joseph C. Tokar - Apple Valley MN
Frank A. Janezich - Richfield MN

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B01D 4602
B01D 4652

US Classification:

55485

Abstract:

An improved filter element assembly for use in an air cleaner on an internal combustion engine comprises a perforated liner. A replaceable filter element comprising a pleated filter medium is releasably coupled to the liner. A safety sleeve assembly is interposed between the filter medium and the liner. An outer liner surrounds the filter medium and exerts a radially inward force thereon to bias the pleats into engagement with the liner. The filter element assembly can be reconditioned when the filter medium becomes used with a replacement kit which includes a new filter element, safety sleeve assembly, and outer liner. The used filter element assembly is disassembled and the worn components thereof replaced with the new components of the kit. The filter medium is expandable from a collapsed cylindrical form in which the filter element is shipped to an expanded conical form for use during filtering operations.