Patents by Inventor Rene Baadjou

Rene Baadjou 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).

  • Piercing mandrel having an improved service life for producing seamless tubes
    Patent number: 9937540
    Abstract: A piercing mandrel for piercing heated round blocks of metal for the production of seamless pipes, having a piercing mandrel nose and a piercing mandrel main body which can be connected to a mandrel bar. The outer diameter of the piercing mandrel nose is formed in a conically tapering manner in the longitudinal direction towards the piercing mandrel main body in order to increase the durability of the piercing mandrel when used for piercing round blocks of metal, in particular higher-alloyed steel materials which are difficult to work, by means of skew rolling providing a qualitative improvement of the inner surface of the pierced round block and reducing tool costs.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: April 10, 2018
    Assignee: Vallourec Deutschland GmbH
    Inventors: Winfried Braun, Christian Klempel, Rene Baadjou, Rolf Kümmerling
  • PIERCING MANDREL HAVING AN IMPROVED SERVICE LIFE FOR PRODUCING SEAMLESS TUBES
    Publication number: 20160346820
    Abstract: A piercing mandrel for piercing heated round blocks of metal for the production of seamless pipes, having a piercing mandrel nose and a piercing mandrel main body which can be connected to a mandrel bar. The outer diameter of the piercing mandrel nose is formed in a conically tapering manner in the longitudinal direction towards the piercing mandrel main body in order to increase the durability of the piercing mandrel when used for piercing round blocks of metal, in particular higher-alloyed steel materials which are difficult to work, by means of skew rolling providing a qualitative improvement of the inner surface of the pierced round block and reducing tool costs.
    Type: Application
    Filed: December 12, 2014
    Publication date: December 1, 2016
    Inventors: Winfried Braun, Christian Klempel, Rene Baadjou, Rolf Kümmerling