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. 28, 2003
Filed:
Mar. 08, 2002
Shinji Yasuhara, Yamatokoriyama, JP;
Yoshihiro Ono, Kashiwara, JP;
Yasuhiko Hasuda, Kashiwara, JP;
Daiji Hiraoka, Nara, JP;
Yasuharu Misada, Kashiwara, JP;
Koyo Seiko Co., Ltd., Osaka, JP;
Abstract
In a method of fabricating a variator disc, an outer periphery ( ) of the input disc (D ), with a spline hole ( ) thereof meshed with an input shaft ( ), is finished using the input shaft ( ) as a working reference. Subsequently, a race ( ) is finished with high precisions using the outer periphery ( ) as a working reference. There is an alternative method wherein a spline hole ( ) with a machining allowance is precisely formed by means of a broach (X) prior to the heat treatment of a blank (B); after hardening the blank (B) by the heat treatment, tooth flanks ( ) of the spline hole ( ) are precisely finished by means of a finishing broach (Y); and then, a race ( ) of an input disc (D ) is precisely finished using the tooth flanks ( ) as a working reference.