Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 9, 2011
Patent Application Number
12251299
Date Filed
October 14, 2008
Patent Primary Examiner
Patent abstract
A transmission and a motor or non-motor type transport device including a cross-coupling power train using the transmission, such as chainless bicycle or wagon with two or four wheels are disclosed. The transmission includes a coarse adjustment gearshift of internal gear type and a fine adjustment gearshift of differential gear type which are mounted on a main shaft to change the speed and are selectively connected to each other by a shift lever to provide low-speed rotation and high-speed rotation.
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