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. 26, 2001
Filed:
Mar. 15, 2000
Shigeharu Ukai, Higashi Ibaraki-gun, JP;
Shunji Mizuta, Higashi Ibaraki-gun, JP;
Tsunemitsu Yoshitake, Higashi Ibaraki-gun, JP;
Shigeki Hagi, Amagasaki, JP;
Noriaki Hirohata, Amagasaki, JP;
Katsuhiro Abe, Kobe, JP;
Takanari Okuda, Kobe, JP;
Japan Nuclear Cycle Development Institute, Ibaraki-ken, JP;
Abstract
A method of producing an iron-based dispersion-strengthened alloy tube (,-,) by utilizing a rolling machine having grooved rolls (,-,) and a mandrel (,)for forming the tube (,-,) from a raw rolling tube (,). In the method, a length of contact between a rolling surface (,-,) of a caliber formed by the grooved rolls and an outer circumference of the rolling tube is set to be 0.9 times or more of a circumferential length of the rolling tube over the entire area of the rolling region. It is preferred that the method be performed by a Pilger type rolling machine.