US 11,943,905 B2
Systems and methods for electromagnetic shielding of rotating components
Jason A. Harrigan, Sultan, WA (US); and David Bennett Johnson, Kirkland, WA (US)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Jan. 14, 2022, as Appl. No. 17/576,366.
Prior Publication US 2023/0232601 A1, Jul. 20, 2023
Int. Cl. H02K 11/01 (2016.01); F04D 29/00 (2006.01); H02K 11/02 (2016.01); H05K 9/00 (2006.01); H05K 7/20 (2006.01)
CPC H05K 9/0018 (2013.01) [F04D 29/002 (2013.01); H02K 11/01 (2016.01); H02K 11/02 (2013.01); H05K 7/20154 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electromagnetic interference (EMI) attenuation device comprising:
a housing stator having an aperture therethrough, wherein at least a portion of the housing stator is electrically conductive;
a fan rotor adjacent to the aperture and having a rotational axis relative to the housing stator and a proximate surface proximate the housing stator, wherein the fan rotor is electrically conductive and the proximate surface is continuous around a rotational direction of the fan rotor and the fan rotor allows fluid flow through the fan rotor and aperture; and
an electrical bridge between the proximate surface of the fan rotor and a contact surface of the housing stator.