Patents by Inventor Michael Dybka

Michael Dybka 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).

  • Pressure balanced valve stem
    Patent number: 5288225
    Abstract: Apparatus includes a mold cavity and a molten plastic inlet channel for communication with the mold cavity for transmission of molten plastic to the mold cavity. A valve stem is provided with substantially no net resulting forces on the valve stem due to melt pressure acting on the projecting area of its upstream and downstream faces.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: February 22, 1994
    Assignee: Husky Injection Molding Systems Ltd.
    Inventors: Harald Schmidt, Bruce Catoen, Michael Dybka