The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2025
Filed:
Dec. 29, 2020
PS Audio Design Oy, Oulu, FI;
Petri Soronen, Oulu, FI;
Vesa Kajanus, Oulu, FI;
Petteri Luukkanen, Oulu, FI;
Mikko Mäkelä, Oulu, FI;
Eero Yli-Rantala, Oulu, FI;
PS Audio Design Oy, Oulu, FI;
Abstract
Acoustic transducer comprises an upper part () and a lower part (), with a first permanent magnet () in the upper part () and a second permanent magnet () in the lower part (). Similarly named magnetic poles of the first and second permanent magnets () face each other. An upper cover () in the upper part () and a lower cover () in the lower part () comprise magnetic material and define an enclosure around the magnets (). A coil () creates, under influence of an electric current, dynamic magnetic forces. A separating gap () between edges of said upper cover () and lower cover () is directed so that it allows a relative movement of the edges of said lower cover () and said upper cover () between different positions, said positions differing in the extent to which edges coincide.