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:
Aug. 22, 1989
Filed:
Apr. 09, 1987
Katsumi Koshimura, Tokyo, JP;
Akio Koike, Tokorozawa, JP;
Kabushiki Kaisha Seidenko, Tokyo, JP;
Abstract
A flat speaker device having a flat speaker unit fitted into a through-hole for mounting a speaker of a wall surface board having its back secured to a wall surface leaving a specific spacing therebetween, the flat speaker unit comprising a total-drive type flat speaker comprising a plurality of magnets juxtaposed on a plane and a diaphragm formed from a plurality of projections for respectively covering the plurality of magnets, a speaker frame with a mounting flange mounted on the flat speaker so as to encircle the outer periphery of the flat speaker, rod-like screw members mounted so as to pass through the speaker frame from the front surface towards the back, and swining blades each disposed on the back of the speaker frame with one end threadedly engaged with a respective rod-like screw member and having a length such that when the blade is swung outwardly of a diagonal line of the speaker frame, the tip portion of the blade extends outwardly from the speaker frame.