Patents by Inventor Wolfgang Zwerenz

Wolfgang Zwerenz 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).

  • Electrical, rotary-percussion hand-held tool
    Patent number: 6983807
    Abstract: An electrical, rotary-percussion hand-held includes a spindle (4), an electric motor for driving the spindle at different rotational speeds corresponding to different operational modes, a percussion mechanism and a gear mechanism arranged between the electric motor (1) and the spindle (4) for transmitting a drive torque from the electric motor (1) to the spindle (4), and a rotation shifting device (7) operatively connected with signal elements (6, 6?) and electrically connected with the electric motor (1) for driving the spindle (4) with a rotational speed corresponding to a selected operational mode.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: January 10, 2006
    Assignee: Hilti Aktiengesellschaft
    Inventors: Martin Mayr, Wolfgang Zwerenz, Walter Wissmach, Christoph Kink
  • Electrical, rotary-percussion hand-held tool
    Publication number: 20040112615
    Abstract: An electrical, rotary-percussion hand-held including a spindle (4), an electric motor for driving the spindle between alternatingly switchable mode, a percussion mechanism and a gear mechanism arranged between the electric motor (1) and the spindle (4) for transmitting a drive torque from the electric motor (1) to the spindle (4), and a rotation shifting device (7) operatively connected with signal elements (6, 6′) and electrically connected with the electric motor (1) for actively shifting rotation of the spindle (4).
    Type: Application
    Filed: August 29, 2003
    Publication date: June 17, 2004
    Inventors: Martin Mayr, Wolfgang Zwerenz, Walter Wissmach, Christoph Kink