Infinity Drive - another IVT in the development stage.

[Miles]

http://www.prlog.org/10608086-cycling-has-new-cvt-on-the-horizon-infinity-drive-cvt-enters-prototyping-phase.html

http://www.iodupont.com/infinitydrive.php

 

[Miles]

This looks like the patent for it:

 

[John in CR]

I hope the IVT proves out, and the wobbler part of the mechanism doesn't lead to durability issues, because this certainly looks to be more efficient than the NuVinci. 1:0-1:1.6 range is incredible too. That makes any hill possible as long as you have sufficient traction.

 

[olaf-lampe]

That would be a nice replacement for my recumbent crank.
I asked the local bike shop, if there are any bigger blades than mine, but there aren't. I'm pedaling like a hamster on steroids at full speed.

-Olaf

 

[amberwolf]

How big is your chainring? Quite large ones can be made, you know. Especially on a 'bent, since there's usually no ground or frame/chainstay clearance to deal with.

Alternately, you could add a jackshaft where the chain goes to a small ring at one end, and another chain comes off a larger one at the other.

 

[Miles]

I asked the local bike shop, if there are any bigger blades than mine, but there aren't. I'm pedaling like a hamster on steroids at full speed.

http://www.ligfietsshop.nl/en/webshop/cog-wheel.html
http://www.hostelshoppe.com/cgi-bin/search.pl?category=605000

 

[TylerDurden]

I'm having a hard time getting my head wrapped around this one.

So far as I can understand, it seems that only one set of the three sawtoothed rings is engaged at a time (bearing all the drive force)? While the other two sets are "losing-ground"(?)

 

[enoob]

im no genius but i like this-

"All mechanical advantages are tailing so... the weak or limiting point of energy transfer will always be down the line from the transmission (like a belt, tire, blade, outside cog, etc.)"

 

[MitchJi]

Hi,

Looks like it needs a custom bottom bracket which isn't good. Might have made more sense to design it for the rear hub.

 

[olaf-lampe]

I asked the local bike shop, if there are any bigger blades than mine, but there aren't. I'm pedaling like a hamster on steroids at full speed.

http://www.ligfietsshop.nl/en/webshop/cog-wheel.html
http://www.hostelshoppe.com/cgi-bin/search.pl?category=605000

YESS! 70 tooth cog wheel
the price is a big cooler

 

[amberwolf]

If you have a drill, and some aluminum sheet, you can make your own. I have a program that prints out sheets you spray glue onto the sheet to give you all the drill points for any chainring you want to make for any BCD.