US 12,465,881 B2
Air filter systems, filter bag assemblies, filter bags and methods
Steven A. Johnson, Lugano (CH); Gabriel J. Safarian, Deephaven, MN (US); David V. Gutman, Brussels (BE); David L. Van Eylen, Herverlee (BE); Benny J.B. Mombaerts, Boortmeerbeek (BE); Eric W.E. Collin, Bilzen (BE); and Iman Vezvaei, Brussels (BE)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Filed by Donaldson Company, Inc., Bloomington, MN (US)
Filed on Dec. 18, 2023, as Appl. No. 18/543,736.
Application 18/543,736 is a division of application No. 17/017,927, filed on Sep. 11, 2020, granted, now 11,883,763.
Claims priority of provisional application 62/899,938, filed on Sep. 13, 2019.
Prior Publication US 2024/0115983 A1, Apr. 11, 2024
Int. Cl. B01D 46/02 (2006.01); B01D 46/00 (2022.01); B01D 46/04 (2006.01); B01D 46/24 (2006.01); B01D 46/71 (2022.01)
CPC B01D 46/04 (2013.01) [B01D 46/0005 (2013.01); B01D 46/02 (2013.01); B01D 46/2414 (2013.01); B01D 46/71 (2022.01)] 8 Claims
OG exemplary drawing
 
1. A method of sealing a filter bag over an aperture in a tubesheet of an air filter system, the method comprising:
positioning a filter bag assembly in a dirty air chamber of an air filter system with a flange assembly of the filter bag assembly located proximate the tubesheet, wherein the filter bag assembly includes a filter bag having a bag opening and a closed end spaced apart from the bag opening, and wherein the filter bag assembly is positioned such that the bag opening is located over the aperture in the tubesheet and the flange assembly covers the aperture; and
forcing the flange assembly against the tubesheet by applying a compression force on a cage attached to the flange assembly, wherein the cage is located in an interior volume of the filter bag and extends away from the flange assembly towards the closed end of the filter bag;
wherein air passing through the aperture in the tubesheet from the dirty air chamber must pass through the filter bag before reaching the aperture.