Patent ID: 10005516

Abstract:
A bicycle driving device: a first socket coupled to a frame; a first crankshaft rotatably coupled to the inside of the first socket; a first left crank arm coupled to the left side of the first crankshaft; a first right crank arm coupled to the right side of the first crankshaft; a second socket coupled to the frame at a location spaced from the first socket; a second crankshaft rotatably coupled to the inside of the second socket; a second left crank arm coupled to the left side of the second crankshaft; a second right crank arm coupled to the right side of the second crankshaft; a left pedal arm pivotally coupled to an end portion of the first left crank arm and to an end portion of the second left crank arm, the left pedal arm having a left pedal coupling portion positioned on an end thereof to be closer to the front than the end portion of the first left crank arm; a left pedal rotatably coupled to the left pedal coupling portion; a right pedal arm pivotally coupled to an end portion of the first right crank arm and to an end portion of the second right crank arm, the tight pedal arm having a right pedal coupling portion positioned on an end thereof to be closer to the front than the end portion of the first right crank arm; and a right pedal rotatably coupled to the right pedal coupling portion.