What makes the Pumgo Scooter design unique compared to other human-powered vehicles?
From an engineering perspective, the Pumgo Scooter’s simultaneous dual-pedal recovery system combined with its drive system is a true innovation in human powered vehicles. Other mobile products have tried to recreate the non-cycling, up-down motion similar to a stair-climber with limited practical results. Parallel crank shafts engage a pair of gears to produce the reciprocal pedal recovery while two chain wheels, similar to a bicycle, combine with four flywheels to form the drive system. Differentials in the two rear wheels allow for each to rotate at different speeds, facilitating smooth, safe turns. The end result is a natural, comfortable ride that is both fun and healthy. Since the pedals operate only in the 80-degree maximum output zone (rather than a full 360 degrees like cycling), the propulsion is extremely efficient with each “pump” producing the highest amount of forward thrust. Yet since the wheel diameter is ten inches, the Pumgo does not exceed a safe riding speed. Unlike
