Patents by Inventor Stefanus Theodorus A. G. Beumer

Stefanus Theodorus A. G. Beumer 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 having a pivot provision adjacent the knee of a user
    Patent number: 7243935
    Abstract: Wheelchair of which a sitting support is pivotable about a virtual or non-virtual pivot axis, extending substantially horizontally, substantially at right angles to a main driving direction of the wheelchair, wherein the upper part of the body of the user, at least its center of gravity, viewed in the main driving direction, lies behind the pivot axis and wherein the pivot axis is located preferably adjacent the hinge point of the knees of a user seated in the wheelchair during use. The sitting support may be freely pivotable about said pivot axis or be fixed at a particular pivot angle. The pivot axis can for instance be designed as a torsion bar.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: July 17, 2007
    Assignee: Ludgerus Beheer B.V.
    Inventor: Stefanus Theodorus A. G. Beumer
  • Wheelchair having a pivot provision adjacent the knee of a user
    Publication number: 20030230868
    Abstract: Wheelchair of which a sitting support is pivotable about a virtual or non-virtual pivot axis, extending substantially horizontally, substantially at right angles to a main driving direction of the wheelchair, wherein the upper part of the body of the user, at least its center of gravity, viewed in the main driving direction, lies behind the pivot axis and wherein the pivot axis is located preferably adjacent the hinge point of the knees of a user seated in the wheelchair during use. The sitting support may be freely pivotable about said pivot axis or be fixed at a particular pivot angle. The pivot axis can for instance be designed as a torsion bar.
    Type: Application
    Filed: June 14, 2002
    Publication date: December 18, 2003
    Applicant: Revab B.V.
    Inventor: Stefanus Theodorus A.G. Beumer