Patents by Inventor Yaping Li

Yaping Li has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Tilt-in-place wheelchair having adjustable wheelbase width
    Patent number: 6467788
    Abstract: A tilt-in-place wheelchair having adjustable wheelbase includes front and rear side frames, hinged cross members supported on the frames, an adjustment rail supported on the frames for rotation relative to the frames, a block slideably supported on the rail and hinged to one pair of cross members, a latch supported on the rail and adapted for releasable engagement with the rail so that the block is alternately fixed to the rail to maintain the width of the wheelbase or released from the rail to allow adjustment of the wheelbase.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: October 22, 2002
    Inventors: Tianfu Li, Yaping Li