Filter element configurations

Patent metadata

Field	Value
Publication number	US-12558639-B2
Application number	US-201916970109-A
Country	US
Kind code	B2
Filing date	Feb 14, 2019
Priority date	Feb 15, 2018
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

The current technology relates to various filter elements configurations where a substrate layer defines a surface having a treatment. The treatment increases a roll off angle of the surface for a 50 water droplet when the surface is immersed in toluene. The filter element can have a housing and the substrate disposed in the housing. In some embodiments the substrate layer defines a plurality of pleats extending between pleat folds that form flow faces of the media. In some embodiments the substrate is incorporated into single facer media of a filter element. In some embodiments the substrate layer is incorporated in a filter element having a flow-by configuration. In some embodiments the substrate layer is incorporated in a filter element having a cross-flow configuration. Some embodiments relate to a vent. Some embodiments relate to a barrier assembly and/or a fuel filter element. Various other filter elements are described.

First claim

What is claimed is:

1 . A filter element comprising:
a substrate layer defining a first surface having a roll off angle in a range of 50 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the first surface is immersed in toluene, wherein the substrate layer comprises cellulose, glass, or a combination thereof, wherein the substrate layer defines a plurality of pleats extending between a first set of pleat folds and a second set of pleat folds, wherein the first set of pleat folds defines a first face and the second set of pleat folds defines a second face.

2 . The filter element of claim 1 , wherein the first face is opposite the second face relative to the filter element.

3 . The filter element of claim 1 , wherein a distance between each adjacent pleat fold in the first set of pleat folds is greater than a distance between each adjacent pleat fold in the second set of pleat folds.

4 . The filter element of claim 1 , further comprising pleat spacers disposed between each pleat fold in the first set of pleat folds.

5 . The filter element of claim 1 , wherein the first face defines a curved plane.

6 . The filter element of claim 1 , wherein the substrate layer defines a plurality of flutes extending between the first set of pleat folds and the second set of pleat folds.

7 . The filter element of claim 6 , wherein a portion of the plurality of flutes are tapered.

8 . The filter element of claim 1 , wherein the substrate layer defines a second surface opposite the first surface, wherein the second surface has a roll off angle in a range of 50 degrees to 90 degrees and a contact angle in a range of 90 degrees to 180 degrees for a 50 μL water droplet when the second surface is immersed in toluene.

9 . The filter element of claim 1 , wherein the first face defines an outer cylindrical surface and the second face defines an inner cylindrical surface.

10 . The filter element of claim 1 , wherein the roll off angle of the first surface is in a range of 60 degrees to 90 degrees, in a range of 70 degrees to 90 degrees, or in a range of 80 degrees to 90 degrees.

11 . The filter element of claim 1 , wherein the first surface comprises a UV-treated surface.

12 . The filter element of claim 1 , wherein the first surface comprises a UV-oxygen-treated surface.

13 . The filter element of claim 1 , wherein the substrate layer comprises at least one of an aromatic component and an unsaturated component.

14 . The filter element of claim 1 , wherein the substrate layer comprises a UV-reactive resin.

15 . The filter element of claim 1 , wherein the first surface comprises a hydrophilic group-containing polymer.

16 . The filter element of claim 15 , wherein the hydrophilic group-containing polymer comprises a hydrophilic pendant group.

17 . The filter element of claim 15 , wherein the hydrophilic group-containing polymer does not comprise a fluoropolymer.

18 . The filter element of claim 15 , wherein the hydrophilic group-containing polymer comprises a hydrophilic polymer.

19 . The filter element of claim 1 , wherein the substrate layer does not comprise polyethylene terephthalate.

Assignees

• Donaldson Co Inc

Inventors

• Rahmathullah Aflal
• Dallas Andrew J
• Tucker Brian R
• Adamek Daniel E
• Way Paul A
• Betcher Scott A
• Kapoor Vijay K
• Marcks Colter A
• Rossiter William S
• Winters Timothy O
• Jodi Wijadi
• Moravec Davis B
• Sontag Stephen K
• Hauser Bradly G
• Goertz Matthew P
• Jones Derek O
• Elsayed Yehya A
• Rajgarhia Stuti S
• Christ Charles S
• Block Joseph M

Classifications

• B01D2265/04

  Permanent measures for connecting different parts of the filter, e.g. welding, glueing or moulding · CPC title

• B01D2239/1216

  Pore size · CPC title

• B01D2239/1208

  Porosity · CPC title

• B01D2239/0695

  Wound layers · CPC title

• B01D2239/065

  More than one layer present in the filtering material · CPC title