US 9,810,126 B2
Flow device for exhaust treatment system
Jérôme Lebas, Précorbin (FR); Stanislas Le Tallec, Saint Jean des Baisants (FR); Antoine Provost, Agneaux (FR); Stéphane Le Merdy, Saint Martin des Besaces (FR); Phebe Helena Preethi, Bloomington, MN (US); and Paul Anthony Way, Edina, MN (US)
Assigned to DONALDSON COMPANY, INC., Minneapolis, MN (US)
Filed by Donaldson Company, Inc., Minneapolis, MN (US)
Filed on Sep. 24, 2013, as Appl. No. 14/35,234.
Application 14/035,234 is a continuation of application No. 12/846,252, filed on Jul. 29, 2010, granted, now 8,539,761.
Claims priority of provisional application 61/294,391, filed on Jan. 12, 2010.
Prior Publication US 2014/0116037 A1, May 1, 2014
This patent is subject to a terminal disclaimer.
Int. Cl. F01N 1/00 (2006.01); F01N 3/28 (2006.01); B01F 3/04 (2006.01); B01F 5/04 (2006.01); B01F 5/06 (2006.01); F01N 3/20 (2006.01)
CPC F01N 3/2892 (2013.01) [B01F 3/04049 (2013.01); B01F 5/0451 (2013.01); B01F 5/0682 (2013.01); B01F 5/0688 (2013.01); F01N 3/2066 (2013.01); F01N 2240/20 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An exhaust conduit adapted to cause exhaust gases to swirl about a longitudinal axis of the exhaust conduit when the exhaust gases flow through the exhaust conduit, the exhaust conduit comprising:
a wall having a first side and an oppositely disposed second side, the wall defining a central flow passage extending through the wall, wherein the central flow passage is centered about the longitudinal axis of the exhaust conduit; and
a plurality of flow deflecting passages extending through the wall, the plurality of flow deflecting passages being positioned around the central flow passage, the plurality of flow deflecting passages including a first set disposed at a first radial distance from the longitudinal axis and a second set disposed at a second radial distance from the longitudinal axis, and wherein the second radial distance is less than the first radial distance, the flow deflecting passages each including:
a hole in the wall, the hole defining a perimeter;
a first flow deflecting member extending from the first side of the wall, the first flow deflecting member joined to the wall at a first portion of the perimeter; and
a second flow deflecting member extending from the second side of the wall, the second flow deflecting member joined to the wall at a second portion of the perimeter.