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. 09, 2010
Filed:
Dec. 21, 2007
Atsushi Tomizawa, Minoo, JP;
Masayasu Kojima, Takarazuka, JP;
Atsushi Tomizawa, Minoo, JP;
Masayasu Kojima, Takarazuka, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Sumitomo Pipe and Tube Co., Ltd., Ibaraki, JP;
Mitsubishi Jidoshakogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
According to a bulging device and a bulging method using a profile element pipe, for example, even when a profile steel pipe having a cross sectional shape varying in the axial direction as in a tapered pipe is hydraulically bulged, a bulging in which an internal pressure loading and an axial pressing are combined with each other can be performed to provide a larger expansion ratio than a conventional case and a joining and socket connection thereof to the other part can also be easily performed.