Patents by Inventor Frank Kollmar

Frank Kollmar 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).

  • Device for connecting a tool to a drive
    Patent number: 6640911
    Abstract: A device for connecting a tool to a mechanical drive contains as the coupling element a spring washer coupling or clutch, which is made in one piece from metal and at least in the rotation direction has a limited resilience. Use is made thereof for preventing torque peaks in the case of a sudden deceleration of the tool, e.g. if a screw strikes a wood surface.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: November 4, 2003
    Assignee: Adolf Wuerth GmbH & Co. KG
    Inventors: Karl Lieser, Andreas Dierolf, Frank Kollmar
  • Device for connecting a tool to a drive
    Publication number: 20020000334
    Abstract: A device for connecting a tool to a mechanical drive contains as the coupling element a spring washer coupling or clutch, which is made in one piece from metal and at least in the rotation direction has a limited resilience. Use is made thereof for preventing torque peaks in the case of a sudden deceleration of the tool, e.g. if a screw strikes a wood surface.
    Type: Application
    Filed: May 25, 2001
    Publication date: January 3, 2002
    Inventors: Karl Lieser, Andreas Dierolf, Frank Kollmar
  • Combination socket-wrench handle and hammer
    Patent number: D724406
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: March 17, 2015
    Assignee: Wuerth International AG
    Inventors: Andreas Dierolf, Alexander Daus, Frank Kollmar, Markus Kuehner