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. 15, 2002
Filed:
Mar. 23, 1999
Hiroshi Shohara, Toyohashi, JP;
Mitsunori Adachi, Toyohashi, JP;
Haruo Suzuki, Aichi-Pref., JP;
Yasuji Kasuya, Okazaki, JP;
Tetuo Ohno, Oobu, JP;
Yasuo Tabuchi, Toyoake, JP;
Masahiro Kinoshita, Kariya, JP;
Shigeo Murata, Kobe, JP;
Other;
Abstract
The manufacturing cost of a multi-stage pulley is reduced without coaxially arranging a plurality of groove forming sections. While a portion between groove sections is being pushed by a pushing roller , the groove sections are successively formed. While a portion of workpiece W pushed by a groove forming roller to form one groove section and a portion of workpiece W pushed by a groove forming roller to form the other groove section are being shifted from each other in the circumferential direction, one groove section ( ) and the other groove section ( ) are simultaneously formed. Due to the foregoing, when the groove sections are formed, it is possible to prevent the deformation of the groove section and the groove section which is adjacent to it. Accordingly, it is possible to enhance the yield of the multi-stage pulley without coaxially arranging a plurality of groove forming sections. Therefore, the cost of manufacturing the multi-stage pulley can be reduced.