Patents by Inventor Robert W. Stoffel

Robert W. Stoffel 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: 4103560
    Abstract: Remote control, day-night, outside rearview mirror control apparatus. The control structure includes a plurality of interconnection cables linking an orthogonally pivotable, double sided vehicle mirror and multi-axial actuation, operator control mechanism. Mirror movement in the form of yaw about the vertical axis thereof is facilitated via swivel motion of a control bat resulting in axial movement of cables terminating outwardly of the reference axis of the mirror. Mirror movement about the horizontal axis thereof, including flipping and control pitch adjustment, is facilitated through a single cable, double action mechanical servo which is responsive to axial and rotational control bat movement. The servo may be positioned adjacent the mirror or control bat and utilizes a spring loaded cam biased within a rotable casing to independently differentiate mirror pitch adjustment signals from day-night flip signals in a fashion which permits
    Type: Grant
    Filed: March 17, 1977
    Date of Patent: August 1, 1978
    Inventors: Robert W. Stoffel, Robert A. Berntsen
  • Patent number: 3994495
    Abstract: A tennis racket having adjustable, resilient means between the handle and the head for reducing arm and elbow shock to the user. The netting is formed by individual lengths of string each having its ends connected to the frame by ferrules. Each string is tensioned in the frame by hand-operated torsion pliers adapted to adjust the tension of the string as it is connected to the frame.
    Type: Grant
    Filed: September 22, 1975
    Date of Patent: November 30, 1976
    Inventor: Robert W. Stoffel