Patents by Inventor Heinrich Wiedemann

Heinrich Wiedemann 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).

  • Sintered selector or sliding sleeve
    Patent number: 6848558
    Abstract: A sintered selector or sliding sleeve, or gear shift sleeve, has internal claw toothing. The individual teeth are delimited on their ends with secondary surfaces having ends that extend radially inward and outward from the root circle of the inner tooth surfaces. The novel geometry of the secondary surfaces extending radially outward from the root circle provide advantages in the manufacture of such selector sleeves by powder metallurgy, compared with those having prior art tooth geometries.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: February 1, 2005
    Assignee: Sinterstahl GmbH
    Inventors: Günter Rau, Lorenz Sigl, Heinrich Wiedemann
  • Sintered selector or sliding sleeve
    Publication number: 20030183479
    Abstract: A sintered selector or sliding sleeve, or gear shift sleeve, has internal claw toothing. The individual teeth are delimited on their ends with secondary surfaces having ends that extend radially inward and outward from the root circle of the inner tooth surfaces. The novel geometry of the secondary surfaces extending radially outward from the root circle provide advantages in the manufacture of such selector sleeves by powder metallurgy, compared with those having prior art tooth geometries.
    Type: Application
    Filed: March 27, 2003
    Publication date: October 2, 2003
    Inventors: Gunter Rau, Lorenz Sigl, Heinrich Wiedemann