US 11,731,072 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., Minneapolis, MN (US)
Appl. No. 16/962,097
Filed by Donaldson Company, Inc., Minneapolis, MN (US)
PCT Filed Jan. 16, 2019, PCT No. PCT/US2019/013826
§ 371(c)(1), (2) Date Jul. 14, 2020,
PCT Pub. No. WO2019/143704, PCT Pub. Date Jul. 25, 2019.
Claims priority of provisional application 62/617,957, filed on Jan. 16, 2018.
Prior Publication US 2020/0338488 A1, Oct. 29, 2020
Int. Cl. B01D 46/00 (2022.01); B01D 46/24 (2006.01); B01D 46/44 (2006.01); B01D 46/64 (2022.01); B01D 46/46 (2006.01); B01D 46/71 (2022.01); F02M 35/02 (2006.01); 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 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, wherein the outer tube comprises a pulse port extending between the interior and exterior surfaces into the outer tube passageway;
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 to an engine proximate the inner engine intake end; and
a pulse jet apparatus in fluid communication with the pulse port of the outer tube, wherein the pulse jet apparatus is configured to direct gas through the pulse port towards the first filter cartridge.