Alt Bike Culture - Can human drive bike using both hands and feet? here is a video about that

This bike was made by my team.
I am an inventor of the combined drive bicycle and i invented it three years ago.
At the first made bike, i have confirmed that human can drive bike with hands and feet, however the critical parts of the bike were not precise enough, so that i designed the second trial bike with my team members.
This video is about the first complete hand&foot drive bike in the world.
Compare with any other hand and foot bike that inventors tried to accomplish the task.
Thank you and enjoy it

http://www.youtube.com/watch?v=1J4s7oIWWHQ

I like that the hand mechanism and pedals can be operated both independently and in conjunction with each other. The only little design flaw I can see is that it seems the rider has to maintain a fairly upright position — this is not very aerodynamic. Maybe the same system could be applied to a recumbent bicycle for less drag without sacrificing any power?

I have seen several bikes pedaled by both hands and feet, both linked and independently. One is Fred Tatch's Manuped, built around 1978.
(Seen in the top right, here: http://www.velovision.com/mag/issue8/Velo-Vision-08-Stegmann.pdf )

Another is Jay Machamer's bike:

http://www.ohpv.org/events/albums/jf2007/images/IMAG0238.jpg

I have seen several bikes pedaled by both hands and feet, both linked and independently.

From what I can make out of the video, this system does not employ an additional chain and ring for the hand input — the mechanism was not visible to me at all, suggesting perhaps an internal shaft drive? Would be interesting to combine this idea with that of MirageBike's Nomad (http://www.miragebikes.com/en/nomad).

Moved from Adaptive Cycling.

From what I can make out of the video, this system does not employ an additional chain and ring for the hand input — the mechanism was not visible to me at all, suggesting perhaps an internal shaft drive? Would be interesting to combine this idea with that of MirageBike's Nomad (http://www.miragebikes.com/en/nomad).

Which one? Fred's or Jay's? (I didn't post any videos.)

Weight shifting is an important control method in riding. Recumbent bike is very sensitive to control, it's drag is minimum among other bikes though.
The developed combined bike posted, use weight shifting more than other bikes. So i think the system could not be applied to the recumbent bike. It's not an experimental result, but from a theoritical thinking on my own. The upright position can be alternated by trimming the crank handle position. Thank you

Weight shifting is an important control method in riding. Recumbent bike is very sensitive to control, it's drag is minimum among other bikes though.
The developed combined bike posted, use weight shifting more than other bikes. So i think the system could not be applied to the recumbent bike. It's not an experimental result, but from a theoritical thinking on my own. The upright position can be alternated by trimming the crank handle position. Thank you

Thanks for the explanation, that makes a lot of sense. Btw, could you tell us a little about how the hand crank integrates with the rest of the drive train, or is that top secret? Also, do you have plans to produce this bike or license your design for commercial production? Hope you have great success!

The integration of the system can be found at Patent US 2012/0104723 A1 -Combined-Drive bycycle
Yes, I have a plan to produce it as soon as possible, because i am anxious to presenting a pleasure of riding with this bike to everybody who wants to experience!
A few persons have experienced this bike including me and when it is told to the experience, the combined bike has a flavor of riding in controlling and powering the hand crank combined with feet pedal.
Although the scene that the bike climbs the hill was not included in the video, the climbing capability of the bike is excellent. I will lead the riders to the new world of riding, new generation of bike world!
License or other sort of cooperation would be welcomed.

The integration of the system can be found at Patent US 2012/0104723 A1 -Combined-Drive bycycle
Yes, I have a plan to produce it as soon as possible, because i am anxious to presenting a pleasure of riding with this bike to everybody who wants to experience!
A few persons have experienced this bike including me and when it is told to the experience, the combined bike has a flavor of riding in controlling and powering the hand crank combined with feet pedal.
Although the scene that the bike climbs the hill was not included in the video, the climbing capability of the bike is excellent. I will lead the riders to the new world of riding, new generation of bike world!
License or other sort of cooperation would be welcomed.

So you're trying to get funding or you want to license your system for production? I think the Bicycle Industry Related forum would be the proper place for this: http://www.bikeforums.net/forumdisplay.php/206-Industry-Related

One thing I noticed is that the hand cranking makes the bicycle unstable and that there was a pronounced amount of wobble when pedaling with the arms.

The integration of the system can be found at Patent US 2012/0104723 A1 -Combined-Drive bycycle
.

There was something wrong with that link. Here is the correct one (http://www.google.com/patents/US20120104723).

One thing I noticed is that the hand cranking makes the bicycle unstable and that there was a pronounced amount of wobble when pedaling with the arms.

Thanks for your comment.
As you can see the conventional bicycle driving, it wobbles a little because human rides it with two wheels.
Many people who have seen the video says the same comments and think it is unstable. However, it is just "it should be" because people judge only with what they have experienced. So i think the video is not enough to show the complete evidence of hand foot bicycle.

So you're trying to get funding or you want to license your system for production? I think the Bicycle Industry Related forum would be the proper place for this: http://www.bikeforums.net/forumdisplay.php/206-Industry-Related


Thank you Jeff.
But i can not enter the chamber and i don't know why

There was something wrong with that link. Here is the correct one (http://www.google.com/patents/US20120104723).

Thank you for your help

While interesting and perhaps usefull for some, this seems to add a lot of complexity to an other wise simple machine.

Thank you Jeff.
But i can not enter the chamber and i don't know why

You probably must be a paid site member to access it.

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As far as the hand & foot bicycle goes, good luck and all but backyard experimenters have been rearranging basic bicycle parts for over a hundred years now.

It is very, very difficult to invent anything functional that has not been already tried.

Someone will like it but someone wouldn't. Functional improvement always involves some complexity however the structure is not so complex as we imagine.

You probably must be a paid site member to access it.

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As far as the hand & foot bicycle goes, good luck and all but backyard experimenters have been rearranging basic bicycle parts for over a hundred years now.

It is very, very difficult to invent anything functional that has not been already tried.

If skillful engineers have tried to invent such a bike, they have found out the secrets that i found, but they haven't needed to do that because there are a lot of things to do in mechanical engineering.
Only amateur inventors have tried to do.