Patents by Inventor Wulf-Dieter Heinrich

Wulf-Dieter Heinrich 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).

  • Wrench provided with an alternating current drive motor
    Patent number: 4517506
    Abstract: The invention relates to a wrench provided with an alternating current drive motor whose peculiarity is a medium frequency asynchronous motor (2) which is used as the drive motor with an associated device (7) for a frequency switching from the medium frequency to a lower line frequency. The mentioned device (7) is connected with a cycle control (8) from which it is switched off as soon as it receives the signal by means of a connected torque sensor (5) about the occurence of the setting moment on the screw joint made with the wrench.
    Type: Grant
    Filed: July 23, 1982
    Date of Patent: May 14, 1985
    Assignee: Robert Bosch GmbH
    Inventors: Wulf-Dieter Heinrich, Henning Otte