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:
May. 11, 2004
Filed:
Jul. 18, 2001
Yuichi Heishi, Hamamatsu, JP;
Masahiro Suzuki, Mooka, JP;
Ikuo Tani, Zama, JP;
Youichi Watanabe, Yokohama, JP;
Shunzou Umegaki, Yokohama, JP;
Kiyotaka Akimoto, Tokyo, JP;
Keiji Yokose, Yokohama, JP;
Other;
Abstract
A maraging steel is subjected to the aging to have a hardness of more than 500 Hv. A nitrided case is formed to have a depth that is about 20% to 50% to a ½ thickness of the maraging steel plate. An endless ring for a metal belt is constructed by the above maraging steel. According to methods of manufacturing the maraging steel and the endless ring, the nitrided case having the depth that is 20% to 50% of a distance from a plate surface to a center can be formed by executing an aging to have the hardness of more than 500 Hv, then executing a nitriding in the nitrogen atmosphere to which organic chloride is added.