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Collapsible wheelchair

  • US 5,338,048 A
  • Filed: 05/10/1993
  • Issued: 08/16/1994
  • Est. Priority Date: 05/10/1993
  • Status: Expired due to Term
First Claim
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1. A carriage for carrying a person in a seated position down stairs under the control of an operator, the carriage comprising:

  • a main frame;

    a seating assembly pivotally connected to the main frame for pivotal movement between open and closed positions;

    a pair of wheel means rotatably mounted on the main frame to support the carriage for movement over a surface; and

    a rail assembly to support the carriage for movement down a series of steps, and pivotally connected to the main frame for pivotal movement between open and closed positions, the rail assembly includingi) a rail member pivotally connected to the main frame,ii) a back roller rotatably mounted on the rail member adjacent a back end thereof,iii) an endless belt mounted on one of the wheel means and on the back rollers for movement around an endless path between said one of the wheel means and the back rollers, and to support the carriage for movement down the series of steps, andiv) a multitude of additional support rollers rotatably mounted on the rail member, between the wheel means and the back roller, to guide and support the endless belt as it moves around said endless path.

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