US 12,146,507 B2
Air warmer
Benjamin James Peterson, Apple Valley, MN (US); Ahmed Reda, Brooklyn Center, MN (US); Jonathan Harold Sanborn, St Louis Park, MN (US); and Michael A. Treppa, Blaine, MN (US)
Assigned to ICU Medical, Inc., San Clemente, CA (US)
Filed by Smiths Medical ASD, Inc., Plymouth, MN (US)
Filed on Apr. 19, 2017, as Appl. No. 15/491,004.
Claims priority of provisional application 62/325,502, filed on Apr. 21, 2016.
Prior Publication US 2017/0306984 A1, Oct. 26, 2017
Int. Cl. F04D 29/66 (2006.01); A61F 7/00 (2006.01); F04D 25/08 (2006.01); F01N 1/04 (2006.01); F01N 1/24 (2006.01); F02M 35/12 (2006.01)
CPC F04D 29/664 (2013.01) [A61F 7/0085 (2013.01); A61F 7/0097 (2013.01); F04D 25/08 (2013.01); F04D 25/084 (2013.01); F04D 29/665 (2013.01); A61F 2007/006 (2013.01); A61F 2007/0091 (2013.01); A61F 2007/0093 (2013.01); A61F 2007/0095 (2013.01); A61F 2007/0096 (2013.01); F01N 1/04 (2013.01); F01N 1/24 (2013.01); F02M 35/1233 (2013.01); F02M 35/1272 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An air blower comprising:
a plenum wherein an impeller is movably positioned, the plenum having an inlet and an outlet;
a motor working cooperatively with the impeller for rotating the impeller;
an inlet noise reduction structure positioned relative to the plenum including a housing having one wide section having a first diameter and one narrow section having a second diameter that is smaller than the first diameter, the wide section and the narrow section forming a common coaxial bore that effects an inlet through passage longitudinally along the inlet noise reduction structure, the one wide section positioned adjacent to the plenum so that an outlet of the inlet through passage is in fluid communication with the inlet of the plenum to establish a fluid communication path between the inlet through passage and the plenum, a noise absorbent material fitted to at least one of the wide and narrow sections to surround a corresponding portion of the inlet through passage;
wherein when the motor is activated, the impeller is rotated to draw air into the plenum from the inlet through passage and to output a stream of air flow through the outlet of the plenum;
wherein a portion of noise resulting from the movement of air in the plenum is reduced by the inlet noise reduction structure;
wherein the wide section is defined by a wide outer circumferential wall having a diameter and the narrow section is defined by a narrow outer circumferential wall that has another diameter smaller than the diameter of the wide outer circumferential wall, a circumferential flange formed where the wide section meets the narrow section, the air blower further comprising:
an air filter removably attached to the circumferential flange, the filter including a circumferential air passable barrier defining a cavity encircling the narrow section;
wherein air is drawn into the cavity when the air blower is in operation.