US 11,812,249 B2
In line damper bellows dual opposing driver speaker
Mattias Jeffrey Scheek, Amsterdam (NL)
Assigned to Mayht Holding B.V., Nieuw-Vennep (NL)
Appl. No. 17/424,181
Filed by Mayht Holding B.V., Nieuw-Vennep (NL)
PCT Filed Mar. 8, 2019, PCT No. PCT/EP2019/055831
§ 371(c)(1), (2) Date Jul. 20, 2021,
PCT Pub. No. WO2020/160791, PCT Pub. Date Aug. 13, 2020.
Claims priority of application No. 19155987 (EP), filed on Feb. 7, 2019.
Prior Publication US 2022/0109936 A1, Apr. 7, 2022
Int. Cl. H04R 9/06 (2006.01); H04R 7/20 (2006.01); H04R 7/04 (2006.01); H04R 7/16 (2006.01); H04R 9/02 (2006.01)
CPC H04R 9/063 (2013.01) [H04R 7/20 (2013.01); H04R 7/04 (2013.01); H04R 7/16 (2013.01); H04R 9/025 (2013.01); H04R 2205/022 (2013.01); H04R 2209/027 (2013.01); H04R 2307/027 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A speaker device comprising two membranes facing each other, and two drive units, each arranged for driving one of the two membranes in opposite direction in operation,
the speaker device further comprising
a vented frame element and a closed frame element, which are positioned outward on either side of the two membranes, and
at least one bellows element connected on a first side to the membrane which is positioned closest to the closed frame element, and connected on a second side to the closed frame element.