Patents by Inventor Yuan Jian Li

Yuan Jian 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).

  • Automatic wheelchair brake system and wheelchair including same
    Patent number: 7434824
    Abstract: An automatically engageable and releasable brake apparatus adaptable to be attached to a wheelchair is provided, including a connection mechanism adapted to be positioned on a rear frame portion of the wheelchair frame, a seat actuation member adapted to be positioned on the wheelchair seat, a brake actuating member coupled to the connection mechanism and in fluid communication with the seat actuation member defining a closed fluid system therewith, and a brake member coupled to the brake actuating member and adapted to contact a ground surface on which the wheelchair is located. Occupational ingress into the wheelchair causes fluid to flow from the seat actuation member to the brake actuating member, which causes the brake member to move from a first position in substantial contact with the ground surface on which the wheelchair is located to a second position spaced a distance above the ground surface.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: October 14, 2008
    Assignee: Air Movement Technologies, Inc.
    Inventors: James B. Connors, Edward Iles, Frank Famulare, Yuan Jian Li, Morgan Zhang