US 11,680,731 B2
Sound reduction grille assembly
Patrick Bouche, Sherbrooke (CA); Raymond Panneton, Sherbrooke (CA); Brent Lillesand, Milwaukee, WI (US); Jean-Bernard Piaud, Drummondville (CA); and Rick Sinur, Hartford, WI (US)
Assigned to Broan-NuTone LLC, Hartford, WI (US)
Filed by Broan-NuTone LLC, Hartford, WI (US)
Filed on May 5, 2022, as Appl. No. 17/737,153.
Application 17/737,153 is a continuation of application No. 16/553,456, filed on Aug. 28, 2019, granted, now 11,353,239.
Prior Publication US 2022/0260278 A1, Aug. 18, 2022
Int. Cl. F24F 13/24 (2006.01); G10K 11/162 (2006.01)
CPC F24F 13/24 (2013.01) [G10K 11/162 (2013.01); F24F 2013/242 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A ventilation assembly comprising:
a main housing defining an inlet through which air can be received into the main housing and defining an outlet;
a blower in the main housing and operable to generate a flow of air; and
a grille configured to be located adjacent to the main housing inlet, the grille defining an outlet aperture and having a plurality of acoustic features arranged annularly about the outlet aperture to reduce sound generated by the blower,
wherein each of the acoustic features comprises at least an outer acoustic body and an inner acoustic body spaced apart from each other and aligned radially relative to the outlet aperture.