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:
Feb. 15, 2011
Filed:
Dec. 28, 2006
Hiroki Naganawa, Nishio, JP;
Shun Kurata, Kariya, JP;
Fumiaki Nakamura, Kariya, JP;
Kinji Ochiai, Kasugai, JP;
Hiroki Ohara, Takahama, JP;
Hiroki Oguchi, Kariya, JP;
Hiroki Naganawa, Nishio, JP;
Shun Kurata, Kariya, JP;
Fumiaki Nakamura, Kariya, JP;
Kinji Ochiai, Kasugai, JP;
Hiroki Ohara, Takahama, JP;
Hiroki Oguchi, Kariya, JP;
Denso Corporation, Kariya, JP;
DENSO Airs Corporation, Anjo, JP;
Abstract
A method of manufacturing a double pipe includes a step of inserting a straight inner pipe into a straight outer pipe such that the inner pipe and the outer pipe are positioned at a predetermined relative position, a step of fixing a first end portion of the outer pipe to the inner pipe so as to form a first fixing portion, a step of bending the outer pipe and the inner pipe at the same time at a predetermined portion so as to form at least one bending portion after the fixing step of the first end portion, and a step of fixing a second end portion of the outer pipe to the inner pipe so as to form a second end portion after the bending.