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:
Oct. 19, 2004
Filed:
Oct. 30, 2002
Kazuo Seiki, Aichi-ken, JP;
Koji Maeda, Aichi-ken, JP;
Kabushiki Kaisha Yoyota Jidoshokki, Aichi-ken, JP;
Abstract
A traveler is formed by a base material consisting of hard steel wire, a nitrogen compound layer, and a sulfide layer such that the nitrogen layer is on the base material side. The nitrogen compound layer and the sulfide layer are formed by executing sulphonitriding treatment on the hard steel wire bent into a traveler shape. The borders between the base material, the nitrogen compound layer, and the sulfide layer are diffused. The spinning machine traveler is used without a running-in operation even when spinning operation is performed at an ultra high spindle rotational speed in excess of 25,000 rpm at the initial use of the traveler, and the service life is also elongated.