US 12,239,934 B2
Pulse ring assembly for air cleaner systems and methods thereof
Thomas R. Olson, Prior Lake, MN (US); Fred H. Wahlquist, Bloomington, MN (US); David W. Mulder, Bloomington, MN (US); Robert R. Levac, Burnsville, MN (US); and Daniel E. Adamek, Bloomington, MN (US)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Filed by Donaldson Company, Inc., Bloomington, MN (US)
Filed on Aug. 7, 2023, as Appl. No. 18/231,012.
Application 18/231,012 is a continuation of application No. 16/962,097, granted, now 11,731,072, previously published as PCT/US2019/013826, filed on Jan. 16, 2019.
Claims priority of provisional application 62/617,957, filed on Jan. 16, 2018.
Prior Publication US 2023/0372859 A1, Nov. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 46/24 (2006.01); B01D 46/44 (2006.01); B01D 46/46 (2006.01); B01D 46/64 (2022.01); B01D 46/71 (2022.01); F02M 35/024 (2006.01); F02M 35/08 (2006.01); F02M 35/10 (2006.01)
CPC B01D 46/71 (2022.01) [B01D 46/2411 (2013.01); B01D 46/446 (2013.01); B01D 46/46 (2013.01); B01D 46/64 (2022.01); F02M 35/02416 (2013.01); F02M 35/086 (2013.01); F02M 35/10144 (2013.01); B01D 2279/60 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An air cleaner system comprising:
an outer tube extending between an outer filter outlet end and an outer engine intake end, wherein the outer engine intake end is operably connectable to an engine intake such that the outer tube and the engine intake are in fluid communication, wherein the outer tube comprises an interior surface and an exterior surface, wherein the interior surface of the outer tube defines an outer tube passageway through the outer tube between the outer filter outlet end and the outer engine intake end;
an inner tube extending along a longitudinal axis between an inner filter outlet end and an inner engine intake end, wherein the inner tube comprises an interior surface and an exterior surface, wherein the interior surface of the inner tube defines an inner tube passageway through the inner tube between the inner filter outlet end and the inner engine intake end, wherein the outer tube is configured to receive the inner filter outlet end within the outer tube passageway such that at least a portion of the interior surface of the outer tube faces at least a portion of the exterior surface of the inner tube proximate the inner filter outlet end, wherein filtered air is configured to flow from a first filter cartridge proximate the outer filter outlet end towards the engine intake proximate the inner engine intake end;
a housing extending around the exterior surface of the outer tube, wherein the outer tube and the inner tube each extend from the housing towards the engine intake, wherein the housing comprises a first filter cartridge in fluid communication with the inner tube passageway and a second filter cartridge surrounding the first filter cartridge, wherein the housing defines a pulse port positioned between the first and second filter cartridges outside of the outer tube passageway, and an inlet such that the first and second filter cartridges are positioned between the inlet and the inner tube passageway, wherein filtered air is configured to flow from the inlet towards the engine intake proximate the inner engine intake end; and
a pulse jet apparatus in fluid communication with the pulse port, wherein the pulse jet apparatus is configured to direct gas through the pulse port into a space between the first filter cartridge and the second filter cartridge.