US Patent 7634857 Steel plate sprocket and method of producing same
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Patent Inventor Names
Katsuhiro Yamamoto0
Takashi Ueki0
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Patent abstract
A sprocket is formed by fine-blanking a steel plate using a die having a cutting edge shaped to produce rounded edges on the back sides of the sprocket tooth heads, and protrusions on the front sides. Thereafter the edges of the front sides of the sprocket tooth heads are formed in a press so that the protrusions are removed, and the edges of the front sides of the sprocket tooth heads have a rounded cross-sectional shape substantially the same as that of the edges of the front sides.
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US Patent 07634857 Steel plate sprocket and method of producing same US Patent 7634857 Steel plate sprocket and method of producing same
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Patent Number
076348570
Patent Number
76348570
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Official Website
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Patent Jurisdiction
Patent Number
076348570
Date of Patent
December 22, 2009
0Patent Application Number
116537560
Date Filed
January 16, 2007
0Official Website
Patent Primary Examiner
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US Patent 07634857 Steel plate sprocket and method of producing same
Infobox
Is a
Patent jurisdiction
Patent number
07634857
Date of patent
December 22, 2009
Patent application number
11653756
Date Filed
January 16, 2007
Patent primary examiner
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