US Patent 10081149 Stepped die
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Patent 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%.
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Patent Inventor Names
Masato Uozumi0
Shinichi Hirono0
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US Patent 10081149 Stepped die
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Is a
Patent jurisdiction
Patent number
10081149
Date of patent
September 25, 2018
Patent application number
15119888
Date Filed
October 17, 2014
Patent primary examiner
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