Patents by Inventor Karl Liedschreiber

Karl Liedschreiber 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: 6237443
    Abstract: A device for manually sharpening cutting tools, especially hand-held cutting tools, comprising a shaft-shaped supporting body, being at least at one end provided with an edge indentation associated with a sharpening tool made of hard metal a and a central tongue projecting into the edge indentation for forming lateral entering grooves terminating at the sharpening tool for a tool to be sharpened. A long tool life of the sharpening tool made of hard metal may be achieved in that the sharpening tool is formed as a circular sharpening plate being rotatable round its axis and being arranged in the area of the inner end of the associated edge indentation with an axis vertically to the edge indentation and the tongue projecting over the plate. The sharpening plate is arranged displaceably in the longitudinal direction of the edge indentation.
    Type: Grant
    Filed: August 4, 1999
    Date of Patent: May 29, 2001
    Inventor: Karl Liedschreiber
  • Patent number: 6009774
    Abstract: A manual sharpening device is proposed which may easily be operated and which may universally be used. This new manual sharpening device comprises a shaft-shaped supporting body comprising at least a fork-shaped end having two edge projections comprising two inner flank surfaces being inclined in a V-shaped manner towards each other, a tongue-shaped tool arrangement disposed between the edge projections and comprising a sharpening tool having parallel side edges made of hard metal, and a guide head limiting the sharpening tool at the end distant from the supporting body. The guide head has side flank surfaces which are parallel to the respective adjacent inner flank surfaces of the edge projections, at least the guide head being displaceable in the longitudinal direction of the tool arrangement.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: January 4, 2000
    Inventor: Karl Liedschreiber