Patents by Inventor Gerhard Polak

Gerhard Polak 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).

  • Apparatus for the preparation of hollow bodies from a thermoplastic material by the blow molding process
    Patent number: 4606717
    Abstract: An apparatus for the production of hollow bodies by blow molding is made up of a locking unit mounted on a bottom stand including a first and second mold support element, each carrying one half of a mold. The two mold support elements are kinematically coupled together by a synchronizing mechanism and fastened to guide spars, with the second mold support elements being displaceable parallel to the first mold support element.In order to prevent the deflection of the guide spars under the effect of the locking pressure leading to the gaping apart of the mold support elements, the locking unit includes a rigid support frame which relieves the bending stress on the guide spars. The guide spars carrying the locking unit are supported on the bottom stand in an axially displaceable manner.
    Type: Grant
    Filed: July 30, 1985
    Date of Patent: August 19, 1986
    Assignee: Krauss-Maffei AG
    Inventors: Gerhard Polak, Norbert Dini