US Patent Issued to PURIFI on Sept. 23 for "Loudspeaker motor with inner permanent magnet" (Danish, Belgian Inventors)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,425,774, issued on Sept. 23, was assigned to PURIFI APS (Hojbjerg, Denmark).

"Loudspeaker motor with inner permanent magnet" was invented by Lars Risbo (Hvalso, Denmark), Carsten Tinggaard (Viby, Denmark), Morten Halvorsen (Rodovre, Denmark) and Bruno Putzeys (Achel, Belgium).

According to the abstract* released by the U.S. Patent & Trademark Office: "A motor for an electrodynamic loudspeaker and an electrodynamic loudspeaker including the motor. The motor includes a magnetic circuit assembly arranged about a motor axis. The motor includes: a magnetically permeable top plate, a magnetically permeable bottom plate, a magnetically permeable member disposed between, and magnetically co...