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.:

US 7778436 B1

PDF
Full Text
Expired
Date of Patent:
Aug. 17, 2010

Filed:

Feb. 02, 2006
Applicants:

Seuk-hwan Chung, Yongin-si, KR;

Jun-kun Choi, Suwon-si, KR;

Sang-won Kim, Seoul, KR;

Seong-geun Kim, Suwon-si, KR;

Seok-jun Park, Suwon-si, KR;

Inventors:

Seuk-Hwan Chung, Yongin-si, KR;

Jun-Kun Choi, Suwon-si, KR;

Sang-Won Kim, Seoul, KR;

Seong-Geun Kim, Suwon-si, KR;

Seok-Jun Park, Suwon-si, KR;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 25/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A vibration-sound generating device and yoke thereof are described. The vibration-sound generating device comprises a diaphragm, a vibration part comprising a magnet and a yoke, which is positioned apart from the diaphragm by a desired distance, a suspension elastically supporting the vibration part, a supporting part supporting the diaphragm and the suspension, and a voice coil electromagnetically driving the diaphragm and the vibration part. The yoke of the invention has higher specific gravity and magnetic permeability than iron. So that it can improve performance of vibration and sound device.


Find Patent Forward Citations

Chung, Seuk-Hwan. (2010). Vibration-sound generating device and yoke thereof (U.S. Patent No. 7778436). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7778436

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