US 12,470,856 B2
Ultrasonic particle reduction system for an acoustic micro-valve
Scott C. Grinker, Belmont, CA (US); Gokhan Hatipoglu, Santa Clara, CA (US); and Peter C. Hrudey, San Jose, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jan. 23, 2024, as Appl. No. 18/420,523.
Claims priority of provisional application 63/486,603, filed on Feb. 23, 2023.
Prior Publication US 2024/0292139 A1, Aug. 29, 2024
Int. Cl. H04R 1/28 (2006.01); B08B 7/02 (2006.01); B81B 7/00 (2006.01); H04R 1/02 (2006.01)
CPC H04R 1/028 (2013.01) [B81B 7/0041 (2013.01); B81B 2201/032 (2013.01); H04R 2499/11 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A portable electronic device comprising:
an enclosure having an enclosure wall that forms an interior chamber containing a transducer and a valve operable to open or close a vent to the interior chamber; and
a particle removal mechanism coupled to the valve that is operable to drive particles away from the valve upon application of a current.