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:
Sep. 25, 2018
Filed:
Oct. 17, 2014
Applicant:
Sumitomo Electric Sintered Alloy, Ltd., Takahashi-shi, JP;
Inventors:
Masato Uozumi, Itami, JP;
Shinichi Hirono, Itami, JP;
Assignee:
Sumitomo Electric Sintered Alloy, Ltd., Takahashi-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 43/02 (2006.01); B22F 3/03 (2006.01); B30B 15/02 (2006.01); B22F 5/10 (2006.01); B22F 3/02 (2006.01); C22C 29/06 (2006.01); C22C 29/08 (2006.01); C22C 29/10 (2006.01);
U.S. Cl.
CPC ...
B30B 15/022 (2013.01); B22F 3/03 (2013.01); B22F 5/106 (2013.01); B30B 15/02 (2013.01); B30B 15/026 (2013.01); B22F 3/02 (2013.01); C22C 29/06 (2013.01); C22C 29/08 (2013.01); C22C 29/10 (2013.01);
Abstract
Provided is a stepped die which includes: an inner ring having a cylindrical shape, and an outer ring having a cylindrical shape which is fitted on an outer periphery of the inner ring by shrinkage fitting, in which a recessed portion for molding which has a stepped portion is formed on an inner side of the inner ring. A shrinkage fitting ratio of the outer ring to the inner ring is set to a value which falls within a range of from 0.12% to 0.25%.