Patents by Inventor Norbert Heyer

Norbert Heyer 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).

  • Nonreturn valve for the screw of a plasticising unit of an injection-moulding machine
    Patent number: 11826937
    Abstract: A nonreturn valve includes two half-shells, arranged in a portion of the screw with a reduced screw diameter. One or more channels for the melt to flow through from the screw into the space in front of the screw is/are provided in each of the half-shells, the channels lie substantially parallel to the longitudinal axis of the nonreturn valve or of the screw. In each of the channels are a ball and, following the ball in the direction of flow of the melt, a pin arranged substantially transversely to the direction of flow of the melt. In the direction of flow of the melt, the channels have a first channel portion, with a channel diameter less than the diameter of the ball, and a second channel portion, with a channel diameter greater than the diameter of the ball, the ball and the pin are arranged in the second channel portion.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: November 28, 2023
    Assignee: KRAUSSMAFFEI TECHNOLOGIES GMBH
    Inventors: Norbert Heyer, Thomas Hungerkamp
  • NONRETURN VALVE FOR THE SCREW OF A PLASTICISING UNIT OF AN INJECTION-MOULDING MACHINE
    Publication number: 20210053264
    Abstract: A nonreturn valve includes two half-shells, arranged in a portion of the screw with a reduced screw diameter. One or more channels for the melt to flow through from the screw into the space in front of the screw is/are provided in each of the half-shells, the channels lie substantially parallel to the longitudinal axis of the nonreturn valve or of the screw. In each of the channels are a ball and, following the ball in the direction of flow of the melt, a pin arranged substantially transversely to the direction of flow of the melt. In the direction of flow of the melt, the channels have a first channel portion, with a channel diameter less than the diameter of the ball, and a second channel portion, with a channel diameter greater than the diameter of the ball, the ball and the pin are arranged in the second channel portion.
    Type: Application
    Filed: April 17, 2019
    Publication date: February 25, 2021
    Inventors: Norbert Heyer, Thomas Hungerkamp