| 摘要 |
A slidingly variable length crank arm (3) assembly for particular use in manually driven vehicles including a slidably extendable crank arm (3) provision to effect a selective change of length of the pedal arm (3) during its rotary motion and in the process adapted such that the torque generated by the pedal-crank assembly of the invention is significantly multiplied to nearly two times the torque generated from conventional pedal-crank system involving arms of fixed and equal lengths ensuring that movement of the foot of thedriver while using, the slidingly variable length crank (3) assembly is maintained in circular path, for example, in case of bicycle the driver's foot moves in the same circular path as in comparable fixed length crank assembly. A simple and cost effective manner of improving the torque generated through pedal-crank systems which would favour diverse and efficient application of such pedal-crank systems in variety of mechanically driven subjects. |
