You can read all about Zeroshift in their patent application:
http://l2.espacenet.com/espacenet/vi...b&LG=en&DB=EPD
Basically, it is a controllable roller clutch, which would allow one gear to be selected while all others are in overrun. Racecar Engineering covered Weismann's Quickshift transmission which did this same thing, which makes me wonder what is new about Zeroshift:
http://www.weismann.net/quickshifts.html
I haven't had time to read the entire patent yet. Please browse and share your thoughts!
