US Patent 7473727 Friction material for transmission
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Patent Inventor Names
Eishin Matsui0
Tomoya Takata0
Yoshiaki Takagi0
Yoshihiro Fukushima0
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Patent abstract
A friction material for a synchronizer ring comprises (A) a petroleum coke with an ash content of 0.1 mass % to 8 mass % or (B) a pitch coke with an ash content of 0.1 mass % to 8 mass %, more preferably (C) a calcined petroleum coke with an ash content of 0.1 mass % to 1 mass % or (D) a foundry coke with an ash content of 5 mass % to 8 mass %. The friction material is effectively used for a synchronizer ring requiring high coefficient of dynamic friction.
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US Patent 07473727 Friction material for transmission US Patent 7473727 Friction material for transmission
Infobox
Patent Number
074737270
Patent Number
74737270
Edits on 23 Sep, 2022
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Patent Jurisdiction
Patent Number
074737270
Date of Patent
January 6, 2009
0Patent Application Number
105589320
Date Filed
June 3, 2004
0Official Website
Patent Primary Examiner
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US Patent 07473727 Friction material for transmission
Infobox
Is a
Patent jurisdiction
Patent number
07473727
Date of patent
January 6, 2009
Patent application number
10558932
Date Filed
June 3, 2004
Patent primary examiner
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