Patents by Inventor Armin Wenzel

Armin Wenzel 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: 10208702
    Abstract: A method for producing a piston may include forming a piston blank in a first forming tool such that the piston blank surrounds a ring carrier configured to receive a piston ring via positive engagement after producing the ring carrier by a sintering process. The piston blank, at least in a circumferential region disposed at a piston head, may be composed of a light metal alloy suitable for forging. The method may also include removing the piston blank from the first forming tool and placing the piston blank in a second forming tool, and inserting a holding-down tool into the second forming tool to hold the ring carrier down. The method may further include pressing a final forming punch into the second forming tool to deform the piston blank and form a piston.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: February 19, 2019
    Assignee: Mahle International GmbH
    Inventors: Udo Rotmann, Armin Wenzel, Juergen Friedrich
  • Publication number: 20180252181
    Abstract: A method for producing a piston may include forming a piston blank in a first forming tool such that the piston blank surrounds a ring carrier configured to receive a piston ring via positive engagement after producing the ring carrier by a sintering process. The piston blank, at least in a circumferential region disposed at a piston head, may be composed of a light metal alloy suitable for forging. The method may also include removing the piston blank from the first forming tool and placing the piston blank in a second forming tool, and inserting a holding-down tool into the second forming tool to hold the ring carrier down. The method may further include pressing a final forming punch into the second forming tool to deform the piston blank and form a piston.
    Type: Application
    Filed: August 15, 2016
    Publication date: September 6, 2018
    Inventors: Udo Rotmann, Armin Wenzel, Juergen Friedrich
  • Patent number: 9782823
    Abstract: A forging device for producing a piston blank has a forging mold that has an essentially cylindrical cavity matching the radial outer surface of the piston blank, a forging base delimiting the cavity, and a central die consisting of a mandrel that has a conically tapering extension which is mounted on the mandrel and the shape of which matches the inner surface of the piston blank. In order to form the radially outer surfaces of the piston slipper walls and a peripheral cooling pocket located radially outside the slipper walls in the piston head, the forging device has two lateral jaws which are mounted in the forging device so as to be movable at an angle to the longitudinal axis of the forging device.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: October 10, 2017
    Assignee: MAHLE International GmbH
    Inventors: Roland Grunert, Juergen Friedrich, Timo Seng, Wolfgang Janisch, Armin Wenzel
  • Publication number: 20150020566
    Abstract: A forging device for producing a piston blank has a forging mold that has an essentially cylindrical cavity matching the radial outer surface of the piston blank, a forging base delimiting the cavity, and a central die consisting of a mandrel that has a conically tapering extension which is mounted on the mandrel and the shape of which matches the inner surface of the piston blank. In order to form the radially outer surfaces of the piston slipper walls and a peripheral cooling pocket located radially outside the slipper walls in the piston head, the forging device has two lateral jaws which are mounted in the forging device so as to be movable at an angle to the longitudinal axis of the forging device.
    Type: Application
    Filed: October 5, 2012
    Publication date: January 22, 2015
    Applicant: MAHLE International GmbH
    Inventors: Roland Grunert, Juergen Friedrich, Timo Seng, Wolfgang Janisch, Armin Wenzel