Patents by Inventor Dietrich Wieland

Dietrich Wieland 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: 5062743
    Abstract: In a drilling device, a holder is provided that is displaceable with respect to a foot in a feed direction. A drilling machine tool is carried by the holder. An electromotor provides a feed drive for driving the holder in the feed direction. The drilling machine tool and/or the holder are displaceable relative to the feed drive in an opposite direction to the feed direction by overcoming a counterforce. A switching element monitors the relative displacement and enables a signal to be derived for stopping the feed drive if a predetermined value of counterforce is exceeded. Motor current is limited to a predetermined maximum value during operation of the device.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: November 5, 1991
    Assignee: C. & E. Fein GmbH & Co.
    Inventors: Dietrich Wieland, Martin Kalb, Werner Grupp, Michael Nothofer