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Adjustable diameter wheel assembly, and methods and vehicles using same

  • US 20040000439A1
  • Filed: 04/16/2003
  • Published: 01/01/2004
  • Est. Priority Date: 04/19/2002
  • Status: Active Grant
First Claim
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1. A wheel assembly adjustable to provide a range of rolling diameters, the wheel assembly comprising:

  • a main shaft comprising an externally threaded portion;

    a first hub and a second hub located on or adjacent the main shaft, wherein either the first hub or the second hub is threadably coupled to the threaded portion of the main shaft;

    at least one reconfigurable wheel member coupled to both the first hub and the second hub, the wheel member having ground contact portions that define the rolling diameter of the wheel assembly;

    a selectively engageable locking apparatus operable to restrict rotation of the main shaft relative to the first hub and the second hub.

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