Fluid filtration apparatuses, systems, and methods

Patent metadata

Field	Value
Publication number	US-12409397-B2
Application number	US-201816637344-A
Country	US
Kind code	B2
Filing date	Aug 9, 2018
Priority date	Aug 10, 2017
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A filter including a first flow face extending along a lateral direction and a transverse direction of the filter, wherein the first flow face includes at least one contaminant retention layer first edge and at least one flow defining layer first edge, a second flow face spaced in an axial direction from the first flow face, wherein the second flow face extends along the length and the width of the filter and includes at least one contaminant retention layer second edge and at least one flow defining layer second edge, at least one contaminant retention layer extending from the contaminant layer first edge to the contaminant layer second edge, and at least one flow defining layer adjacent to at least one of the contaminant retention layers, the at least one flow defining layer extending from the flow defining layer first edge to the flow defining layer second edge, wherein at least one of the flow defining layers defines at least one fluid flow path in the axial direction as fluid moves from the first flow face toward the second flow face.

First claim

What is claimed is:

1. A filter comprising:
a first flow face extending along a length and a width of the filter, wherein the first flow face comprises at least one contaminant retention layer first edge and at least one flow defining layer first edge;
a second flow face spaced in an axial direction from the first flow face, wherein the second flow face extends along the length and the width of the filter and comprises at least one contaminant retention layer second edge and at least one flow defining layer second edge;
at least one contaminant retention layer extending from the contaminant retention layer first edge to the contaminant retention layer second edge;
at least one flow defining layer adjacent to at least one of the contaminant retention layers, the at least one flow defining layer extending from the flow defining layer first edge to the flow defining layer second edge;
a depth extending from the first flow face to the second flow face;
first and second sides spaced from each other across the width of the filter and extending along the length and the depth of the filter;
first and second ends spaced from each other across the length of the filter and extending along the width and the depth of the filter;
wherein the at least one contaminant retention layer and the at least one flow defining layer are planar, non-fluted members arranged as a stack of layers, with planar surfaces of adjacent contaminant retention layers and flow defining layers in contact with each other;
wherein the stack of layers is compressed within a housing; and
wherein the filter is sealed along the first and second ends so that fluid may only flow axially through the filter in a single fluid flow path direction that extends axially from the first flow face to the second flow face.

2. The filter of claim 1 , wherein the at least one contaminant retention layer comprises multiple contaminant retention layers.

3. The filter of claim 1 , wherein the at least one flow defining layer comprises multiple flow defining layers.

4. The filter of claim 1 , further comprising an alternating pattern of contaminant retention layers and flow defining layers across the width of the filter.

5. The filter of claim 1 , wherein at least one of the flow defining layers comprises a first surface, an opposite second surface, and a plurality of apertures extending from the first surface to the second surface.

6. The filter of claim 1 , wherein at least one of the flow defining layers is at least partially compressed into a thickness of one of the contaminant retention layers.

7. The filter of claim 1 , wherein the at least one contaminant retention layer comprises filtration media that extends from the first flow face to the second flow face.

8. The filter of claim 1 , wherein the first flow face comprises an inlet for material flow and the second flow face comprises an outlet for material flow.

9. The filter of claim 1 , wherein the at least one flow defining layer comprises fibers having a first mean fiber diameter and the at least one contaminant retention layer comprises fibers having a second mean fiber diameter that is different from the first mean fiber diameter.

10. The filter of claim 1 , wherein the at least one flow defining layer comprises pores having a first mean flow pore size and the at least one contaminant retention layer comprises pores having a second mean flow pore size that is different from the first mean flow pore size.

11. The filter of claim 1 , wherein the first flow face is generally parallel to the second flow face.

12. The filter of claim 1 , in combination with the housing, the housing at least partially surrounding the at least one contaminant retention layer and the at least one flow defining layer.

13. The filter of claim 1 , wherein the depth in the axial direction of at least one of the flow defining layers is different from the depth of at least one of the contaminant retention layers.

14. The filter of claim 1 , wherein the axial fluid flow direction from the first flow face toward the second flow face comprises a material flow from the first flow face to the second flow face, wherein the material flow comprises one of a fluid flow and an air flow.

15. The filter of claim 1 , wherein the filter comprises a plurality of flow defining layers and contaminant retention layers arranged in a stack, and wherein the stack comprises a total of between 40 and 100 flow defining layers and contaminant retention layers per inch.

16. The filter of claim 1 , wherein a plurality of contaminant retention layers and a plurality of flow defining layers are arranged in a cube configuration.

17. The filter of claim 1 , further comprising:
a first filtration zone comprising a first portion of the at least one contamination retention layer and a first portion of the at least one flow defining layer, wherein the first filtration zone comprises a first permeability; and
a second filtration zone adjacent to the first filtration zone, the second filtration zone comprising a second portion of the at least one contamination retention layer and a second portion of the at least one flow defining layer, wherein the second filtration zone comprises a second permeability that is different from the first permeability of the first zone;
wherein at least one of the flow defining layers defines at least one fluid flow path in the axial direction as fluid moves through the first filtration zone and the second filtration zone.

18. A filter comprising:
a top flow face extending along a length and a width of the filter, wherein the top flow face comprises at least one contaminant retention layer top edge and at least one flow defining layer top edge;
a bottom flow face spaced in an axial direction from the top flow face, wherein the bottom flow face extends along the length and the width of the filter and comprises a at least one contaminant retention layer bottom edge and at least one flow defining layer bottom edge;
at least one contaminant retention layer extending from the top flow face to the bottom flow face;
at least one flow defining layer adjacent to at least one of the contaminant retention layers, the at least one flow defining layer extending from the top flow face to the bottom flow face;
wherein the at least one contaminant retention layer and the at least one flow defining layer are planar, non-fluted members arranged as a stack of layers, with planar surfaces of adjacent contaminant retention layers and flow defining layers in contact with each other;
wherein the stack of layers is compressed within a housing; and
wherein the at least one flow defining layer causes a material flow in the axial direction as fluid moves from the top flow face toward the bottom flow face.

19. A method of filtering fluid, comprising the steps of:
positioning a filter in a fluid flow path, the filter comprising:
a first flow face extending along a length and a width of the filter, wherein the first flow face comprises at least one contaminant retention layer first edge and at least one flow defining layer first edge;
a second flow face spaced in an axial direction from the first flow face, wherein the second flow face extends along the length and the width of the filter and comprises at least one contaminant retention layer second edge and at least one flow defining layer second edge;
at least one contaminant retention layer extending from the contaminant retention layer first edge to the contaminant retention layer second edge;
at least one flow defining layer adja

Assignees

• Donaldson Co Inc

Inventors

• Goertz Matthew P
• Dallas Andrew J
• Jones Derek O
• Elsayed Yehya

Classifications

• B01D2239/1216

  Pore size · CPC title

• B01D2239/065

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

• B01D39/1607

  the material being fibrous (B01D39/18 takes precedence) · CPC title

• B01D29/46

  of flat, stacked bodies · CPC title

• B01D2275/10

  Multiple layers · CPC title