Patent · US Active

Loudspeaker

US12250531B2 · kind B2 · utility

0Cited by

4References

17Claims

0Family size

Assignee

HARMAN BECKER AUTOMOTIVE SYSTEMS GMBH · DE

Inventors

Andreas Pfeffer · Wenzenbach, DE
Maximilian Josef KNEILLING · Rothenbrunn, DE

Key dates

Filing date	Sep 13, 2022
Grant date	Mar 11, 2025
Priority date	—
Expiry date	Mar 24, 2043

Classification

Technology area (CPC H)Electricity
CPC primaryH04R7/127
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A loudspeaker including a first diaphragm, a second diaphragm spaced from the first diaphragm, a first voice coil coupled to the first diaphragm, a second voice coil coupled to the second diaphragm, and a magnet assembly. The magnet assembly includes a magnet, a magnetic piece and a spacer of non-magnetic material connecting the magnet and the magnetic piece such that a gap is provided between the magnet and the magnetic piece. The first voice coil is arranged at a first end of the gap and the second voice coil is arranged at a second end of the gap opposite the first end of the gap.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.