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:
Jun. 10, 2003
Filed:
Dec. 22, 2000
Nobuyuki Yoshitoshi, Shizuoka-ken, JP;
Hiroto Yanagibayashi, Shizuoka-ken, JP;
Hirokazu Shirai, Shizuoka-ken, JP;
Akihiro Suzuki, Shizuoka-ken, JP;
Noriyuki Sato, Shizuoka-ken, JP;
Takeshi Sasagase, Shizuoka-ken, JP;
Fumio Hosoda, Shizuoka-ken, JP;
Kazuo Ishii, Tochigi-ken, JP;
Masayuki Uegane, Tochigi-ken, JP;
Takeshi Munemura, Tochigi-ken, JP;
Yoshihiko Eguchi, Tochigi-ken, JP;
Other;
Abstract
In manufacturing an exhaust pipe of two-passage construction, a metallic plate having a first end and a second end respectively elongated in a longitudinal direction of the exhaust pipe is prepared. The metallic plate is bent into a substantially S shape in cross section. It has a diametrically extending central partition plate and a substantially semicircular peripheral wall on each lateral side of said partition plate in such a manner that a groove of substantially V shape in cross section having a substantially closed end on a radially inner side and an open end on a radially outer side is formed at each diametrically outer portion of the partition plate. A target is provided so as to elongate along the groove in a manner to extend substantially radially outward from the closed end. A welding arc is generated between the target and a welding gun disposed on a side of the open end such that the substantially closed end and the target are welded together.