Patent ID: 8979108
Filing Date: 2015-03-17
Classification: B62M

Abstract:
1. A bicycle comprising: a rear wheel with a sprocket, wherein the rear wheel rotates about a first axis; a first chain that interfaces to the sprocket of the rear wheel; two rear-facing levers with pedals, wherein the two levers are pivotably mounted on a second axis spaced forward with respect to the first axis; a reversible chainwheel that guides a second chain; and a hub, disposed on a third axis spaced forward with respect to the first axis and spaced rearward with respect to the second axis, to which are fixed two freewheels cooperating with the two levers and a chainwheel, wherein the first and second freewheels and the chainwheel of the hub are configured to drive the first chain that interfaces to the sprocket of the rear wheel, wherein each of the two levers is operably coupled to a respective segment of the second chain that connects the respective lever to the corresponding freewheel; wherein each of the two rear-facing levers is operably coupled to a respective segment of the second chain at a corresponding attachment point that defines an attachment axis; wherein the rear-facing levers are each configured to pivot in an oscillatory manner between an upper extreme pedal position and a lower extreme pedal position; and wherein, in the upper extreme pedal position, a straight line guided from the second axis through the attachment axis defined by the attachment point of the respective lever to the corresponding segment of the second chain is tangent to the corresponding freewheel that rotates about the third axis.