Granted Patent B2

US 12,233,366 · App. 17/360,859 · Granted Feb 25, 2025

Inventors: Mike J. Madsen (Chaska, MN); Brian D. Babcock (Columbus, TN)

Assignee: Donaldson Company, Inc.

B01D39/1607B01D39/16B01D39/1623B01D39/18F02M37/22B01D24/007B01D35/005B01D2239/0216B01D2239/1233

Abstract

Claims (28)

1. A filter for filtering liquid fuels, the filter comprising:

filter media configured and arranged for placement in a liquid fuel stream, the filter media comprising an upstream media layer and a downstream media layer, the upstream media layer comprising a mixture of:

a) media fiber; and

b) scaffold fiber having an average diameter greater than the media fiber;

wherein the upstream media layer has a mean flow pore size of less than 20 microns and is smaller than the mean flow pore size of the downstream media layer,

wherein the mode pore size of the upstream media layer is from 10 to 50 microns and is at least 40 percent greater than the mode pore size of the downstream media layer; and

wherein the media fiber and scaffold fiber both are melt-blown fibers; and

the downstream media layer comprising cellulose.

2. The filter for filtering liquid fuels of claim 1 , wherein the media fiber has an average diameter of less than 5 microns.

3. The filter for filtering liquid fuels of claim 1 , wherein the filter media has a Compressibility Solidity Factor of less than 600.

4. The filter for filtering liquid fuels of claim 1 , wherein the filter media has a solidity of less than 12 percent.

5. The filter for filtering liquid fuels of claim 1 , wherein the filter media has a compressibility of less than 40 percent at a pressure of 1.24 kg/cm 2 .

6. The filter for filtering liquid fuels of claim 1 , wherein the filter media has a max flow pore size at least 200 percent greater than the mean flow pore size.

7. The filter for filtering liquid fuels of claim 1 , wherein the filter media has a mode flow pore size of at least 20 microns.

8. A filter for filtering liquid fuels, the filter comprising:

filter media configured and arranged for placement in a liquid fuel stream, the filter media comprising an upstream media layer and a downstream media layer, the upstream media layer comprising a mixture of:

a) media fiber; and

b) scaffold fiber having an average diameter greater than the media fiber;

wherein the upstream media layer has a mean flow pore size of less than 20 microns and is smaller than the mean flow pore size of the downstream media layer,

wherein the mode pore size of the upstream media layer is from 10 to 50 microns and is at least 40 percent greater than the mode pore size of the downstream media layer;

wherein the media fiber and scaffold fiber both are melt-blown fibers;

wherein the media fiber has an average diameter of less than 5 microns; and

wherein the filter media has a Compressibility Solidity Factor of less than 60; and

the downstream media layer comprising cellulose.

9. The filter for filtering liquid fuels of claim 8 , wherein the filter media has a solidity of less than 12 percent.

10. The filter for filtering liquid fuels of claim 8 , wherein the filter media has a compressibility of less than 40 percent at a pressure of 1.24 kg/cm 2 .

11. The filter for filtering liquid fuels of claim 8 , wherein the filter media has a max flow pore size at least 200 percent greater than the mean flow pore size.

12. The filter for filtering liquid fuels of claim 8 , wherein the filter media has a mode flow pore size of at least 20 microns.

Assignments (1)

Continuity (3)

References Cited (235)