[python] Re: Bipolar update

  • From: Dirk Bonné <dirk.bonne@xxxxxxx>
  • To: python@xxxxxxxxxxxxx
  • Date: Mon, 28 Nov 2011 13:14:16 +0100

On 27.11.2011 20:26, Vi Vuong wrote:
In the mean time, the Dirtsurfer with similar wheel setup seem to do OK at higher speed,
"The board is unique in that it incorporates a patented steering geometry [2] where the front wheel pivots from a point in front of and below the axle of the wheel, via the 'Swingarm'. The rider's weight automatically centres and straightens the front wheel, creating stability and control. Another feature of the Dirtsurfer which is not found on other four-wheeled boards is that, much like a bicycle, the stability actually increases with speed, thanks to the gyroscopic action of the large wheels."  http://en.wikipedia.org/wiki/Dirtsurfing
Looks like the pivot rise design is patented, http://www.google.com/patents?vid=USPAT6398237

I am not a specialist on patents, but I can only see that the scope of the patent is the skateboard. The invention is not about the geometry, but is part of an application in the skateboard. It cannot be the pivot anyway because there is prior art: all the shopping carts use this geometry: pivot in front of wheel, negative angle.

Dirk
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