Patents by Inventor Gunnar Garpendahl

Gunnar Garpendahl 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).

  • Method and apparatus for monitoring the tool status in a tool machine with cyclic machining
    Patent number: 4558311
    Abstract: The vibration level (a) is measured and applied to controllable filter (F). The filter (F) is a band pass filter that only passes a narrow band around a certain frequency that is determined by the frequency (1) of the machining cycle. The output signal of the filter is then compared to one or several reference levels (7) and an alarm signal is outputted in case of unacceptable deviation from the reference level.
    Type: Grant
    Filed: December 10, 1982
    Date of Patent: December 10, 1985
    Assignee: KB WIBRA
    Inventors: Roland Forsgren, Gunnar Garpendahl, Hans Eriksson, Bengt Wallentin
  • Apparatus for measuring the interior dimensions of a cast iron mold
    Patent number: 4352060
    Abstract: A device for measuring the inside dimensions of a cast iron mold includes a measuring device movably arranged inside the cast iron mold on one or several guide rails. The measuring device comprises a rim with plates, each of which forms a capacitor together with an adjacent portion of the mold wall. An electronic unit for generating and subsequently processing signals corresponding to the capacitances of the separate capacitors provides an indication of the interior dimensions of the mold, based upon the capacitance measurements.
    Type: Grant
    Filed: July 1, 1980
    Date of Patent: September 28, 1982
    Assignee: Viak AB
    Inventors: Gunnar Garpendahl, Ingrid Bruce, Ebbe Lundmark