Patents by Inventor Ronald N. Hatcher

Ronald N. Hatcher 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).

  • Method for moving a wheelchair over stepped obstacles
    Patent number: 5447317
    Abstract: A lifting apparatus is easily attached to a conventional wheelchair and allows the wheelchair to successfully negotiate stepped obstacles, such as steps and curbs. The apparatus includes two parallel base runners that are extended from beneath the wheelchair to the ground to act as a lifting platform. A lifting subsystem then moves the wheelchair vertically and horizontally to the height of the step, and a sliding subsystem then moves the wheelchair forward onto the step. Descending a step is accomplished in a reverse sequence of operations.
    Type: Grant
    Filed: July 23, 1993
    Date of Patent: September 5, 1995
    Inventors: Paul R. Gehlsen, Ronald N. Hatcher
  • Apparatus for moving a wheelchair over stepped obstacles
    Patent number: 5230522
    Abstract: A lifting apparatus is easily attached to a conventional wheelchair and allows the wheelchair to successfully negotiate stepped obstacles, such as steps and curbs. The apparatus includes two parallel base runners that are extended from beneath the wheelchair to the ground to act as a lifting platform. A lifting subsystem then moves the wheelchair vertically and horizontally to the height of the step, and a sliding subsystem then moves the wheelchair forward onto the step. Descending a step is accomplished in a reverse sequence of operations.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: July 27, 1993
    Inventors: Paul R. Gehlsen, Ronald N. Hatcher