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:
Nov. 18, 2008
Filed:
Dec. 25, 2003
Masao Taira, Hiroshima, JP;
Michisada Kumasaki, Hiroshima, JP;
Masao Taira, Hiroshima, JP;
Michisada Kumasaki, Hiroshima, JP;
Hirotec Corporation, Hiroshima, JP;
Abstract
A flexible tubeof the present invention is disposed downstream of a exhaust path from an engine E, and formed of an outer bellowsas an outer tube and an inner bellowsas an inner tube; pleatsof the inner bellowsare smaller in depth and pitch than the pleatsof the outer bellowsand the buffering space S is provided with a gap t between the pleats bottoms of the outer bellowsand the pleats tops of the inner bellowsand further, a partitionthat splits the exhaust path is disposed in the inner bellowsFor this reason, sound insulation effect is improved, and the lowering of the temperature of the exhaust gas is suppressed, leading to quick temperature rise of the exhaust gas to be fed into the catalytic converter, thereby promoting the activation of the catalysts and improving the capability to purify exhaust gas, and the exhaust efficiency can be improved thereby increasing output performance of the engine.