Filter cartridge; components thereof; and methods

Patent metadata

Field	Value
Publication number	US-11623172-B2
Application number	US-202016918552-A
Country	US
Kind code	B2
Filing date	Jul 1, 2020
Priority date	Feb 27, 2009
Publication date	Apr 11, 2023
Grant date	Apr 11, 2023

Abstract

An air filter cartridge includes a coiled media pack with inlet flutes and outlet flutes. The coiled media pack has first and second rounded ends with at least a first straight side and a second side. The coiled media pack has: (i) a length extending along a straight line from a center of the first rounded end to a center of the second rounded end; (ii) a first width between the first straight side and second side; the first width being perpendicular to the length; and (iii) a second width thereacross; the second width being perpendicular to the length. The first width is narrower than the second width.

First claim

What is claimed is:

1. An air filter cartridge comprising:
(a) a coiled media pack having a first flow face and a second flow face which is opposite of the first flow face; the coiled media pack including:
(i) a set of inlet flutes open at the first flow face to passage of air to be filtered therein;
(ii) a set of outlet flutes open at the second flow face;
(iii) the coiled media pack being closed to flow of unfiltered air into the first flow face and then outwardly from the second flow face without filtering;

(b) the coiled media pack having first and second rounded ends with at least a first straight side and a second side in complete extension therebetween;
(i) the coiled media pack having a length extending along a straight line from a center of the first rounded end to a center of the second rounded end;
(i) the coiled media pack having a first width between the first straight side and second side; the first width being perpendicular to the length;
(ii) the coiled media pack having a second width thereacross; the second width being perpendicular to the length; and
(iii) wherein the first width is narrower than the second width.

2. An air filter cartridge according to claim 1 further comprising:
a non-circular core; the coiled media pack being wound around the non-circular core.

3. An air filter cartridge according to claim 2 wherein:
the non-circular core is generally sector-shaped.

4. An air filter cartridge according to claim 1 wherein:
the first flow face is planar.

5. An air filter cartridge according to claim 1 wherein:
the coiled media pack includes fluted sheet secured to a facing sheet.

6. An air filter cartridge according to claim 1 further comprising:
a wedge-shaped core; the coiled media pack being wound around the wedge-shaped core.

7. An air filter cartridge according to claim 1 wherein:
the first flow face and second flow face are planar.

8. An air filter cartridge according to claim 1 wherein:
the coiled media pack has a third width thereacross extending between two sides of one of the first rounded end or the second rounded end; the third width being perpendicular to the length; and

wherein the third width is narrower than the first width.

9. An air filter cartridge according to claim 1 wherein:
the second side is a straight side in complete extension between the first and second rounded ends.

Assignees

• Donaldson Co Inc

Inventors

• Raether Thomas D
• Zauner Brian
• Belcher Mark
• Safarian Gabriel

Classifications

• B01D46/02

  Particle separators, e.g. dust precipitators, having hollow filters made of flexible material · CPC title

• B01D46/71

  with pressurised gas, e.g. pulsed air · CPC title

• B01D46/525

  which comprises flutes · CPC title

• B01D46/58

  connected in parallel · CPC title

• B01D2275/206

  Special forms, e.g. adapted to a certain housing · CPC title