Patents by Inventor John W. Britz

John W. Britz 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).

  • Patent number: 11590039
    Abstract: A propulsion assist device for a wheelchair having a hand rim slideably housed inside a channel of a frame pivotably connected to a lever arm. The frame is further comprised of a portion of grip material positioned inside the channel along an underside of a top of the frame. When a pair of devices are installed on a pair of hand rims of the wheelchair, the wheelchair is moved forward by a coordinated rowing motion of both lever arms forwards and then backwards along the hand rim. The pivoting motion of the frame causes the grip material sandwiched between the frame and the hand rim to pressure grip the hand rim and turn it when a user moves the lever arms through their rowing motion. Repositioning the frame along the hand rim causes the gripping material to release and slide along the hand rim before repositioning.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: February 28, 2023
    Inventor: John W. Britz