The Ped-Power Sprocket is a transmission for motorized bikes which permits the bike to be used both as a pedal cycle and a motor-assisted pedal cycle. The transmission has a pair of pins with two modes of use:
Go Pedal: Pins Out: Freewheeling pedal cycle - great for short trips and exercise!
Go Power Boost: Pins In: Pedal Start/motorized bicycle - great when you need a boost!
Now you can have the best of both worlds on one bike - pedal and power boost!!
HybriPed Sprocket Technical Benefits
Pedal whenever you can: There is no transmission drag in pedal mode. There is no transmission drag in pedal mode. This means that you can use the bike as a pedal cycle all day if you want to. You cannot consume less fuel any other way!
Pedal start engine: It is soo eeaasy! When in Power Boost mode, you have a pedal-start engine, and you put the hassle of engine-starting behind you. Even a cold engine is easy to start. No more unnecessary engine idling. Never worry about the engine stalling again. When you come to a standstill, let the engine stall. To go, simply pedal off, let out the clutch and you are away. This is the recommended practice with a pedal-start engine and you save even more fuel!
Of course the Ped-Power Sprocket is not a clutch. You don't have continuous motor-assist and freewheeling bicycle at the same time. If that is what you want, then the HPS is not for you.
No more stuff on handlebar: Cyclists have enough handlebar stuff anyway. The Ped-Power sprocket does not have another lever on the handlebar. You typically only need to switch between Go Pedal and GO Power Boost once or twice in a trip.
Extend engine life: The less you use the motor, the less wear there is. You don't need power boost most of the time. When the engine is not in use, it does not wear, does not consume fuel and does not require maintenance.
Fewer broken spokes: The Ped-Power Sprocket is gentle on spokes. The spoke fixture uses twice as many fasteners and locks the motor-drive spokes into a rigid truss around the wheel hub spoke flange. So far, the prototypes have had no broken spokes over a duration of two years.
Simplicity plus: Only one moving part. The Ped-Power Sprocket has only one moving part, the mechanical bearing. It is proving to be very reliable in service and is expected to have a service life of many thousands of kilometres.
HybriPed Ped-Power Sprocket Explained
The Exploded View and Hub Section pictures show how the Ped-Power Sprocket fits together. It has three main parts: sprocket (B11); coupling pins (F01) and spoke fixture (A11).
The sprocket spins on a mechanical bearing (C11) around the axle. The twin coupling pins lock the spoke fixture to the sprocket so that it must rotates about the same axis. Consequently, the rotational load on the spokes is constantly evenly distributed (provided that they are similarly tensioned), thereby ensuring that minimal fatigue. The prototype has not broken one spoke in 2 years / 9,000 kilometres.
In this mode, the rider pedals the bicycle without any motor assistance, motor chain movement or any felt resistance whatsoever. The 2 coupling pins are removed from the sprocket and spoke fixture and held elsewhere.
Power Boost mode
In this mode, the rider has full motor-power and easy pedal-starting of the motor with the sprocket locked to the wheel. The coupling pins are insert between the sprocket and spoke fixture.
Each coupling pin has a retaining ball at the inner end of the shaft and retainer at the outer end.
Ped-Power Sprocket is protected under Patent Treaty
Intellectual property embodied in the HybriPed Hybrid Ped-Power Sprocket is protected under Patent Cooperation Treaty (PCT) International Patent Application No: PCT/AU2008/000196