Patents by Inventor Horst Zirnsak

Horst Zirnsak 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: 5927121
    Abstract: A method of manufacture of a gear part with a bottom area and a circumferential area, which has two portions. One portion extends to one side of the bottom area, while the other portion extends to the opposite side of the bottom area. On one portion is formed an inner profiling and on the other portion an outer profiling. According to a first method, on a cup-shaped preform a web is formed by splitting or flow-forming and extends in the opposite direction to the cup wall. In the thus formed web and in the cup wall are subsequently made the desired profilings. In a second method, an arcuate curl is produced and is subsquently flow-formed to the portions with the profilings.
    Type: Grant
    Filed: January 16, 1998
    Date of Patent: July 27, 1999
    Assignee: Leico Gmbh & Co. Werkzeugmaschinenbau
    Inventors: Bernhard Rolf, Horst Zirnsak