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:
Sep. 10, 2024
Filed:
Apr. 27, 2020
Foster Electric Company, Limited, Tokyo, JP;
Takayuki Tabata, Tokyo, JP;
FOSTER ELECTRIC COMPANY, LIMITED, Tokyo, JP;
Abstract
An on-vehicle woofer system includes: a speaker unit including a magnetic circuit and a diaphragm connected to the magnetic circuit, and capable of generating sound waves by electrically driving the magnetic circuit to vibrate the diaphragm; a Helmholtz resonator to which a first surface of the diaphragm is oriented, the Helmholtz resonator being connected to the speaker unit; a sealed container to which a second surface of the diaphragm that is a back surface of the first surface is oriented, the sealed container providing a sealed space connected to the speaker unit; and a tube penetrating the Helmholtz resonator, the speaker unit, and the sealed container.