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. 03, 2009
Filed:
Jul. 28, 2005
Takashi Akaba, Kobe, JP;
Shuho Tsubota, Takasago, JP;
Kenji Nishikawa, Kobe, JP;
Noriaki Sugimoto, Kobe, JP;
Shoji Kushimoto, Kobe, JP;
Takashi Ishide, Takasago, JP;
Takahiro Ohta, Takasago, JP;
Takashi Akaba, Kobe, JP;
Shuho Tsubota, Takasago, JP;
Kenji Nishikawa, Kobe, JP;
Noriaki Sugimoto, Kobe, JP;
Shoji Kushimoto, Kobe, JP;
Takashi Ishide, Takasago, JP;
Takahiro Ohta, Takasago, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A residual stress improving apparatus for piping, which can heat an outer peripheral surface of piping to reduce (including eliminate) the residual stress of the piping is provided. The apparatus has a laser head portion, and circumferential direction moving mechanism composed of a ring rail and a rotational travel bogie. Further, the apparatus may adjust the reflection direction of laser light so that the laser light reflected by the outer peripheral surface of the piping does not return to the laser head, and adjust the delivery direction of the laser light so that the outer peripheral surface of the bending pipe portion located forwardly, in the pipe axis direction, of the laser head is irradiated with the laser light.