US Patent 9333635 Chisels
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Patent abstract
A chisel includes an elongate shank portion composed of a first steel, and a working end portion composed of a second steel that is different than the first steel. The working end portion is joined to the shank and configured to chisel a workpiece. The joined shank portion and working end portion has been heat treated to cause the first steel of the shank portion to adopt a first microstructure comprising bainite, the second steel of the working end portion to adopt a second microstructure comprising martensite, and the working end portion to have a greater hardness than the shank portion.
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Patent Inventor Names
David N. Johnson0
Florian Probst0
Thomas J. Quinn0
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Official Website
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US Patent 09333635 Chisels US Patent 9333635 Chisels
Infobox
Patent Number
093336350
Patent Number
93336350
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Patent Jurisdiction
Patent Number
093336350
Date of Patent
May 10, 2016
0Patent Application Number
145668670
Date Filed
December 11, 2014
0Official Website
Patent Primary Examiner
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US Patent 09333635 Chisels
Infobox
Is a
Patent jurisdiction
Patent number
09333635
Date of patent
May 10, 2016
Patent application number
14566867
Date Filed
December 11, 2014
Patent primary examiner
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