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:
Jan. 24, 2006
Filed:
Aug. 07, 2002
Tadashi Shiraishi, Hyogo, JP;
Masatoshi Yoshida, Hyogo, JP;
Kazunori Kumada, Hyogo, JP;
Keita Nakagawa, Hyogo, JP;
Makoto Matsubayashi, Hyogo, JP;
Mitsuhiro Matsuda, Hyogo, JP;
Tadashi Shiraishi, Hyogo, JP;
Masatoshi Yoshida, Hyogo, JP;
Kazunori Kumada, Hyogo, JP;
Keita Nakagawa, Hyogo, JP;
Makoto Matsubayashi, Hyogo, JP;
Mitsuhiro Matsuda, Hyogo, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
The present invention is one for providing an apparatus and a method which make it possible to remove a foreign object or matter such as scale attached on an inner surface of a pipe easily for a short period of time by means of simple equipment and manner, and constituted as follows. Specifically, a holder () is attached onto an end of a pipe (P), an abrasion assisting member () fixed to a tip end of a support arm () is inserted into the pipe (P) by use of the holder () and stopped at an area (A) where oxide scale (S) is generated in a large amount. Then abrasive is sent with pressure into the pipe (P) by a blast device (), and thus a flow rate of the abrasive in the scale-abraded area (A) is increased to abrade and remove the oxide scale (S) securely. Moreover, if required, a spiral groove () is formed on an outer circumference of the abrasion assisting member () to increase centrifugal force of the abrasive.