Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Chang Hui Lin0
Date of Patent
May 12, 2009
0Patent Application Number
114856700
Date Filed
July 13, 2006
0Patent Primary Examiner
Patent abstract
A crank device includes a crank arm having an opening formed in one end and defined by an outer peripheral fence for attaching to a crank shaft, and an orifice formed in another end and defined by an outer peripheral wall for coupling to a foot pedal, and the crank arm includes one or more apertures formed in the other end and formed in the outer peripheral wall for weight reducing purposes. The aperture may be laterally formed in the other end of the crank arm, or formed through the outer peripheral wall of the crank arm and communicating with the orifice of the crank arm. The crank arm may further include one or more depressions for further weight reducing purposes.
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