Patents by Inventor Nils Hedeen

Nils Hedeen 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).

  • Wheelchair motorizing apparatus
    Patent number: 6805209
    Abstract: A wheelchair motorizing apparatus employs an articulated tread drive in combination with front support wheels and rear drive wheels. The tread drive is used to provide traction during the ascent or descent of stairs or the traversing of obstacles, the front support wheels are used to raise and lower the front of the wheelchair, and the rear drive wheels are used to raise and lower the rear of the wheelchair in addition to providing drive traction and steering. A positioning mechanism integral with the tread drive acts to keep the treads in contact with the terrain or stairs.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: October 19, 2004
    Inventor: Nils Hedeen
  • Wheelchair motorizing apparatus
    Publication number: 20030183428
    Abstract: A wheelchair motorizing apparatus employs an articulated tread drive in combination with front support wheels and rear drive wheels. The tread drive is used to provide traction during the ascent or descent of stairs or the traversing of obstacles, the front support wheels are used to raise and lower the front of the wheelchair, and the rear drive wheels are used to raise and lower the rear of the wheelchair in addition to providing drive traction and steering. A positioning mechanism integral with the tread drive acts to keep the treads in contact with the terrain or stairs.
    Type: Application
    Filed: March 27, 2002
    Publication date: October 2, 2003
    Inventor: Nils Hedeen