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:
Apr. 21, 2020
Filed:
Jun. 08, 2018
Harman International Industries, Incorporated, Stamford, CT (US);
Toni Otto Lilienthal, Northridge, CA (US);
Alexander Voishvillo, Simi Valley, CA (US);
Harman International Industries, Incorpcrated, Stamford, CT (US);
Abstract
An electrodynamic transducer includes a rear frame defining an open frame interior and having an annular base. A central vent extends through the transducer along a central axis, where a first segment of the central vent extends upwardly from the base. A movable diaphragm is positioned within the open frame interior and operably connected to the rear frame. A magnet assembly is concentrically disposed with respect to a second segment of the central vent and coupled to a third segment of the central vent forward of the diaphragm, wherein a magnetic air gap is defined between the magnet assembly and the central vent. A voice coil is disposed within the magnetic air gap and operably connected to the diaphragm. The central vent allows bi-directional air flow in and out of the transducer. When the transducer is mounted in an enclosure, the central vent may function as a Helmholtz port.