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Manually propelled wheelchair device

  • US 5,941,547 A
  • Filed: 01/16/1996
  • Issued: 08/24/1999
  • Est. Priority Date: 01/16/1996
  • Status: Expired due to Fees
First Claim
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1. A manually propelled vehicle comprising:

  • a frame, a first lever pivot point structure mounted on said frame, a first lever pivotally mounted on said first pivot point structure, a plurality of wheels mounted on said frame to facilitate the movement of said frame on a supporting surface, at least one of said wheels defining a first rotatable drive wheel;

    a first drive linkage operatively connecting said first lever and said first drive wheel for converting pivotal movement of said first lever about said first pivot point structure to rotary movement of said first drive wheel to propel said frame;

    a first clutch connected to said first drive wheel and said first drive linkage to transmit selected pivotal movement of said first lever to produce rotary movement of said first drive wheel;

    a first attachment member movably mounted on said first lever for attaching said first drive linkage to said first lever;

    a first force conversion mechanism for moving said first attachment member on said first lever to change the location of the connection of said first drive linkage on said first lever to change the ratio of pivotal movement of said first lever to said rotary movement of said first drive wheel; and

    said first farce conversion mechanism including a first elongated shaft mounted on said first lever, first means for guiding the movement of said first attachment member along said first elongated shaft, said first elongated shaft being of a length to extend above and below said first pivot point structure, and a first handle mounted on said first lever for moving said first attachment member along said first elongated shaft to a plurality of positions above and below said first pivot point structure of said first lever.

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