Patent ID: 9366175
Filing Date: 2016-06-14
CPC Classification: B23K,F01N,Y10T

Claim Text:
1. A muffler having a shell formed by making a fit between respective opening end portions of metallic finished articles each having a peripheral wall extending in a standing position from a peripheral edge of a substrate and welding the finished articles, wherein the shell is characterized in that a flared part is provided at the opening end portion of a first finished article, a flange is provided at a tip of a peripheral wall extending substantially vertically and belonging to the flared part, the flange being bent to project outwardly, a peripheral wall is provided at the opening end portion of a second finished article by cutting a portion including a tip formed by press molding, the peripheral wall at the opening end portion of the second finished article is press fitted inside the peripheral wall of the flared part of the first finished article to fit into the peripheral wall of the flared part so as to extend substantially along the peripheral wall of the flared part, and a part of the peripheral wall of the flared part of the first finished article and a part of the peripheral wall at the opening end portion of the second finished article that fit into each other are laser welded along their entire peripheries.