• US 20140339003A1
  • Filed: 07/30/2014
  • Published: 11/20/2014
  • Est. Priority Date: 06/04/1999
  • Status: Active Grant
First Claim
Patent Images

1. A vehicle for carrying a payload including a user, the vehicle comprising:

  • a. a platform which supports the user;

    b. a ground-contacting module, to which the platform is mounted, which propels the user in desired motion over an underlying surface;

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

    the drive arrangement, ground-contacting module and payload comprising a system being unstable with respect to tipping when the motorized drive is not powered;

    the motorized drive arrangement causing, when powered, automatically balanced operation of the system wherein the vehicle has a present velocity and a maximum operating velocity, determined by a requirement of acceleration to maintain balance and, in operation, has a balancing margin determined by the difference between the maximum operating velocity and the present velocity of the vehicle;

    d. a balancing margin monitor, coupled to the ground-contacting module, for generating a signal characterizing the balance margin; and

    e. an alarm, coupled to the balancing margin monitor, for receiving the signal characterizing the balancing margin and for warning when the balancing margin falls below a specified limit.

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