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Stability control system

  • US 9,827,823 B2
  • Filed: 05/04/2016
  • Issued: 11/28/2017
  • Est. Priority Date: 02/14/2007
  • Status: Active Grant
First Claim
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1. A wheelchair suspension comprising:

  • a frame;

    a seat supported by the frame;

    a pair of drive wheels supporting the frame;

    first and second front casters coupled to the frame such that the fronts casters are moveable upwardly and downwardly with respect to the frame;

    at least one rear caster coupled to the frame;

    at least one stabilizing cylinder coupled to the frame and the front casters;

    wherein the at least one stabilizing cylinder locks to prevent upward movement of the front casters with respect to the frame and allows downward movement of the front casters when the wheelchair exhibits a tipping behavior; and

    wherein the at least one stabilizing cylinder includes a spring return that biases the front casters downward with respect to the frame.

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