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:
May. 04, 1982
Filed:
Jun. 30, 1980
Kunihiko Shimada, Tokorozawa, JP;
Yukio Tsuchiya, Tokorozawa, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A coaxial multi-way planar diaphragm loudspeaker system having inner and outer frames rigidly coupled to each other. An inner peripheral edge portion of a planar diaphragm for the bass-range and an outer peripheral edge portion of a planar diaphragm for the mid-range are commonly supported by a common edge supporting member which is rigidly coupled to the front surface of the inner frame. A single backchamber is provided for the mid-range and higher-range speaker units to separate them from the rear chamber of the bass-range loudspeaker unit. The backchamber has an inclined surface portion extending toward the the rear-side of the bass-range loudspeaker unit. The driver units for the treble-ranges are attached to the frame through a mounting bracket having an oblong screw hole so that they can first be assembled then accurately positioned.