Patents by Inventor Guenther Stark

Guenther Stark 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: 8327948
    Abstract: An electric hand tool device, in particular, a percussion drill or a drill hammer, comprises a spindle (10) that can be driven by a drive motor and cooperates at one end (12) with a tool support, and a percussion element (24) for axially moving the spindle (10) in a percussion position, wherein an adjusting element (42) is provided for adjusting the spindle (10) between the percussion position and a rotary position, the adjusting element (42) comprising a switch ring (44) which is disposed about the spindle (10) and has cam configurations (46,48) on both end faces thereof, wherein one of the cam configurations (46) can engage in a corresponding cam configuration (52) which is fixed to the housing through turning the switch ring (44), and the second cam configuration (48) can be brought into engagement with a corresponding cam configuration (60) of a pressure piece (54) which can be axially moved relative to the housing (16), in order to adjust the percussion element (42) to a percussion position.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: December 11, 2012
    Inventors: Guenther Stark, Mathias Naumann
  • Publication number: 20090126959
    Abstract: An electric hand tool device, in particular, a percussion drill or a drill hammer, comprises a spindle (10) that can be driven by a drive motor and cooperates at one end (12) with a tool support, and a percussion element (24) for axially moving the spindle (10) in a percussion position, wherein an adjusting element (42) is provided for adjusting the spindle (10) between the percussion position and a rotary position, the adjusting element (42) comprising a switch ring (44) which is disposed about the spindle (10) and has cam configurations (46,48) on both end faces thereof, wherein one of the cam configurations (46) can engage in a corresponding cam configuration (52) which is fixed to the housing through turning the switch ring (44), and the second cam configuration (48) can be brought into engagement with a corresponding cam configuration (60) of a pressure piece (54) which can be axially moved relative to the housing (16), in order to adjust the percussion element (42) to a percussion position.
    Type: Application
    Filed: January 6, 2009
    Publication date: May 21, 2009
    Inventors: Guenther Stark, Mathias Naumann
  • Publication number: 20070215369
    Abstract: The invention concerns an electric hand tool device, in particular, a percussion drill or a drill hammer, comprising a spindle (10) that can be driven by a drive motor and cooperates at one end (12) with a tool support, and a percussion means (24) for axially moving the spindle (10) in a percussion position, wherein an adjusting means (42) is provided for adjusting the spindle (10) between the percussion position and a rotary position, the adjusting means (42) comprising a switch ring (44) which is disposed on the spindle (10) and has cam configurations (46,48) on both end faces thereof, wherein one of the cam configurations (46) can engage in a corresponding cam configuration (52) which is fixed to the housing through turning the switch ring (44), and the second cam configuration (48) can be brought into engagement with a corresponding cam configuration (60) of a pressure piece (54) which can be axially moved on the spindle (10), in order to adjust the percussion means (42) to a percussion position.
    Type: Application
    Filed: February 28, 2007
    Publication date: September 20, 2007
    Applicant: Metabowerke GmbH
    Inventors: Guenther Stark, Mathias Naumann