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Self-balancing ladder and camera dolly

  • US 20040007425A1
  • Filed: 07/09/2003
  • Published: 01/15/2004
  • Est. Priority Date: 05/27/1994
  • Status: Active Grant
First Claim
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1. A device for carrying a payload, which may include a user, over a surface, the device comprising:

  • a. a payload support which supports the payload at a height above the surface, b. a ground-contacting module, mounted to the platform, including a plurality of laterally disposed ground-contacting members and defining a fore-aft plane;

    c. a motorized drive arrangement, coupled to the ground-contacting module;

    the drive arrangement, ground-contacting module and payload constituting a system;

    the motorized drive arrangement causing, when powered, automatically balanced operation of the system in an operating position that is unstable with respect to tipping in at least a fore-aft plane when the motorized drive arrangement is not powered; and

    d. an elevation mechanism for permitting variation of the height of the payload above the surface.

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