Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Masahiro Yamanaka0
Toshio Tetsuka0
Yoshiaki Nanko0
Date of Patent
July 10, 2007
0Patent Application Number
109555630
Date Filed
September 30, 2004
0Patent Primary Examiner
Patent abstract
A drive mechanism for a bicycle transmission assist mechanism includes a crank arm having a drive member. The drive member includes a first abutment facing a forward rotational direction of the crank arm and a non-concave sloped surface facing a rearward rotational direction of the crank arm.
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