I have been reading messages over the past several months about combinations of derailleur systems, gear hubs, and mountain drives for bents that only their creator could love. They are probably achieving their objectives, but such combinations are not the answer.
I am seeking reactions and responses to a new power train that I have patented and am attempting to convince a major gearbox manufacturer to develop as a new product line. My power train can also be developed as a gear hub, but the gear hub version is more complicated and more difficult to sell at this stage of the game.
My gearbox is a two-stage clutchless gearbox that engages the next gear before disengaging the original gear. It is in two gears at the same time during the shifting sequence without a clutch, without a neutral between gears, and witout locking up. No other gearbox in the world can do this. Instaneous shifting.
The model I am developing for bents is a 25-speed (5x5), all true gears without any redundant gears, with a range of 675%. It can be geared down to 9.9 - 67.1 gear inches with a 20 inch wheel or up to 27.8 - 187.9 with a 28 inch wheel by changing the free wheel sprocket and will handle a pedal load of 400 lbs. and a rider/cargo/bike weight of 350 lbs. It mounts on the frame and will be about 7 inches long, 5 inches high, and 3 inches wide.
A single shifter shifts through all gears in perfect sequence with the shifts between stages seamless to the rider. Increments between gears are nearly uniform from 8.0 to 8.5 percent. The shifter has up/down buttons for single-step shifts, a drop button that downshifts five gears in a single step, and a programmable button that will shift from any gear to a gear pre-selected by the rider. No cables = no adjustments. Gears are enclosed and protected from the elements and road hazards. Mechanical efficiency will be considerably higher than any other power train because it has only two gear meshes in any gear.
What else would you want? Your input would be appreciated.