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:
Oct. 18, 2016
Filed:
May. 05, 2015
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Akiyoshi Yamamoto, Nisshin, JP;
Hideki Homma, Inuyama, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;
Abstract
A manufacturing method of a sub-muffler includes a rectangular tubular body shaping step, a preliminary shaping step, and a diameter reduction shaping step. In the rectangular tubular body shaping step, a plate material is bent and a rectangular tubular body having a rectangular shape in cross section is thereby formed. In the preliminary shaping step, ends of the rectangular tubular body are preliminarily formed and the end parts of the tubular body are thereby formed so that its cross-sectional shape becomes a circular shape. In the diameter reduction shaping step, the diameters of the ends of the rectangular tubular body are reduced.