Patents by Inventor Dietmar Pfefferle

Dietmar Pfefferle 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: 4436364
    Abstract: Piezoelectric light deflecting apparatus consists of first and second piezoceramic strips 11, 12 each of which has a clamped end and a free end 15. The strips 11, 12 are substantially aligned in one plane with their free ends 15 facing one another and spaced apart by a distance x. An AC voltage U having a frequency which differs significantly from the natural resonant frequency of the strips is used to energize the strips to execute oscillations so that their free ends are periodically displaced in counterphase to one another. A mirror 13 is mounted via flexible legs 14 to the free ends of the piezoceramic strips 11, 12 so that the mirror 13 executes a rotary oscillation as a result of the counterphase movements of the free ends of the piezoceramic strips.
    Type: Grant
    Filed: September 4, 1981
    Date of Patent: March 13, 1984
    Assignee: Erwin Sick GmbH Optik-Elektronik
    Inventors: Reinhard Lauer, Dietmar Pfefferle