Patents by Inventor Fritz Warth

Fritz Warth 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).

  • Method for producing a light-alloy bearing bush with a rough external surface
    Patent number: 6957489
    Abstract: The aim of the invention is to produce a light-alloy bearing bush with a rough external surface. To achieve this, particles, which are subsequently surrounded in part by the molten metal, are applied to the surface of the casting mould. When the bearing bush is released from the mould, the particles remain in said bush and are subsequently removed from the bearing bush preform either mechanically or by being dissolved in liquid.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: October 25, 2005
    Assignee: Mahle GmbH
    Inventors: Karlheinz Bing, Martin Rühle, Fritz Warth, Frank Winger
  • Method for producing a light-alloy bearing bush with a rough external surface
    Publication number: 20040163256
    Abstract: The aim of the invention is to produce a light-alloy bearing bush with a rough external surface. To achieve this, particles, which are subsequently surrounded in part by the molten melt, are applied to the surface of the casting mould. When the bearing bush is released from the mould, the particles remain in said bush and are subsequently removed from the bearing bush preform either mechanically or by being dissolved in liquid.
    Type: Application
    Filed: December 23, 2003
    Publication date: August 26, 2004
    Inventors: Karlheinz Bing, Martin Ruhle, Fritz Warth, Frank Winger
  • Piston with cooling channel
    Patent number: 5947065
    Abstract: A light-metal piston has a sheet-metal cooling channel integrally cast in the piston head. In order to improve the heat transfer between the piston material and the cooling channel and to reduce the manufacturing costs of the cooling channel, the channel has a narrow slit, which allows oil to pass, extending along at least part of the channel wall.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: September 7, 1999
    Assignee: Mahle GmbH
    Inventors: Karlheinz Bing, Martin Ruhle, Fritz Warth, Heinz Wimmer