Patents by Inventor Martin Rühle

Martin Rühle 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: 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
  • Patent number: 6837298
    Abstract: To prevent, in a cooled ring carrier (1) for pistons, durinh Alfin bonding, the formation of oxides induced by air that escapes due to porous ring carrier material and, as a consequence, an impairment of the ring carrier bond. To this end, the cooled ring carrier, once the ring carrier part and the sheet metal part (3) have been linked, is subjected to negative pressure in a vacuum tank.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: January 4, 2005
    Assignee: Mahle GmbH
    Inventor: Martin Rühle