Patents by Inventor Bjorn Hofer

Bjorn Hofer 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).

  • Electrical control device for electric motor driven, electrically turnable wheelchairs for invalids and other patients
    Patent number: 3990319
    Abstract: An electrical control or operation device for wheelchairs for invalids is provided, the wheelchair being driven and steered electrically. The device comprises two control means, each preferably consisting of two potentiometers, one of the control means controlling the speed forward and backward of the wheelchair, and the other control means controlling the direction of motion of the wheelchair. The two control means may be potentiometers or similar means and can be adjusted individually by one single lever. The body or casing of one of the two control means is fixed to the frame of the control device, and that of the other control means is mechanically connected to the control shaft of the first control means, whereas the control shaft of the second control means is mechanically connected to the lever.
    Type: Grant
    Filed: July 1, 1974
    Date of Patent: November 9, 1976
    Assignee: Landstingens Inkopscentral Lic.
    Inventor: Bjorn Hofer