US 12,134,060 B2
Filter systems with dirty air chamber spacer elements and methods of using the same
Thomas D. Raether, St. Louis Park, MN (US)
Assigned to Donaldson Company, Inc., Minneapolis, MN (US)
Filed by Donaldson Company, Inc., Minneapolis, MN (US)
Filed on Jul. 31, 2023, as Appl. No. 18/228,318.
Application 18/228,318 is a continuation of application No. 17/412,685, filed on Aug. 26, 2021, granted, now 11,745,133.
Application 17/412,685 is a continuation of application No. 16/722,259, filed on Dec. 20, 2019, granted, now 11,123,671, issued on Sep. 21, 2021.
Application 16/722,259 is a continuation of application No. 15/724,441, filed on Oct. 4, 2017, granted, now 10,556,198, issued on Feb. 11, 2020.
Application 15/724,441 is a continuation of application No. 14/753,592, filed on Jun. 29, 2015, granted, now 9,795,908, issued on Oct. 24, 2017.
Application 14/753,592 is a continuation of application No. 13/896,564, filed on May 17, 2013, granted, now 9,067,164, issued on Jun. 30, 2015.
Claims priority of provisional application 61/790,184, filed on Mar. 15, 2013.
Claims priority of provisional application 61/648,494, filed on May 17, 2012.
Prior Publication US 2023/0372857 A1, Nov. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 46/58 (2022.01); B01D 46/00 (2022.01); B01D 46/24 (2006.01); B01D 46/42 (2006.01); B01D 46/60 (2022.01); B01D 46/71 (2022.01)
CPC B01D 46/58 (2022.01) [B01D 46/0005 (2013.01); B01D 46/0043 (2013.01); B01D 46/2411 (2013.01); B01D 46/4281 (2013.01); B01D 46/60 (2022.01); B01D 46/71 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A filter system comprising:
a housing comprising a tubesheet separating the housing into a dirty air chamber, a clean air chamber, an end wall panel located across the dirty air chamber from the tubesheet, and a hopper located below the dirty air chamber;
a plurality of spacer elements attached to the tubesheet, wherein each spacer element of the plurality of spacer elements comprises a clean air inlet and a clean air outlet, and wherein the clean air outlet of each spacer element of the plurality of spacer elements is attached to the tubesheet;
a plurality of apertures in the tubesheet, wherein the clean air outlet of each spacer element of the plurality of spacer elements is positioned over an aperture of the plurality of apertures in the tubesheet such that air passing from the dirty air chamber into the clean air chamber through each spacer element of the plurality of spacer elements passes through the aperture;
a plurality of filter elements, wherein each filter element of the plurality of filter elements is attached to the clean air inlet of one spacer element of the plurality of spacer elements, wherein each spacer element of the plurality of spacer elements and the filter element attached to each spacer element are positioned above the hopper; and
a dirty air inlet configured to deliver a dirty air stream into the dirty air chamber along a dirty air flow axis, wherein at least a portion of particulate matter entering the dirty air chamber through the dirty air inlet falls into the hopper under the force of gravity;
wherein the dirty air flow axis does not extend through any filter elements of the plurality of filter elements;
and wherein the dirty air flow axis extends through or passes at least one spacer element of the plurality of spacer elements at a location between the clean air inlet and the clean air outlet of the at least one spacer element.