This is the system used on the vetrix and is very
natural.  As a matter of fact when I rode it I could
use the regen as the brake almost exclusively after
only a few minutes of riding.

--- Chris Tromley <[EMAIL PROTECTED]> wrote:

> On 6/23/07, Andrew in Ann Arbor <[EMAIL PROTECTED]>
> wrote:
> 
> > For a bike I think you'd do better with a twist
> grip that would let you
> > ramp up the regen by twisting further away from
> you just as you ramp up
> > the acceleration by twisting the throttle towards
> you.
> >
> > So the twist grip would have an "off" position
> (centered by two
> > springs).
> > Twisting one way would increase the power to the
> motor.
> > As you slowed down you'd return the grip to the
> "off position" which
> > should be large enough to allow coasting.
> > Twisting further the other way would gradually
> bring the regen in.
> >
> > Doe any of the modern controllers offer a gradual
> regen feature?
> 
> Hi Andrew,
> 
> This is a great example of how our patent system
> drives me crazy.
> Your idea is simple, elegant, intuitive.  (Some
> would say obvious.)  I
> had the same idea myself.  So have others.  Turns
> out it's exactly
> what Cedric Lynch did on his ultra-lightweight
> recumbent motorcycle,
> and was posted on Paul Compton's(?) site years ago. 
> Yet in spite of
> that public disclosure, Vectrix was able to patent
> the idea.  See the
> last bullet point on this page:
> 
> http://www.vectrix.com/default.aspx?portal=1&page=68
> 
> Now anyone who wants to use it on a production
> motorcycle needs to
> license it from Vectrix.  (Hmmm.  Paul, if it was
> posted on your page,
> would you be able to prove when?  I wonder if a
> verified prior
> disclosure could be used to invalidate a patent?)
> 
> There are no limitations on personal use though.  It
> seems to work quite well.
> 
> Chris
> 
> 



       
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