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:
Jul. 07, 2009
Filed:
Jun. 28, 2007
Yasushi Ido, Aichi-ken, JP;
Masaru Hattori, Aichi-ken, JP;
Yasushi Ido, Aichi-ken, JP;
Masaru Hattori, Aichi-ken, JP;
Toyoda Gosei Co., Ltd., Aichi-pref., JP;
Abstract
In a muffler duct including a duct body and a resonance box, the inside of the duct body and the inside of the resonance box are made to communicate directly with each other not through a cylindrical member. In the partition wall of the resonance box, a gas vent opening portion, which is composed of a gas vent opening having a through hole shape and a gas-permeable member having a gas vent passage of a labyrinth shape for covering said gas vent opening, is formed at a position to confront a communication opening, through which the inside of the duct body and the inside of the resonance box communicate with each other.