Patents by Inventor Hermann Zwilling

Hermann Zwilling 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).

  • Extrusion of peroxide crosslinkable polymer parts
    Patent number: 7731879
    Abstract: A process for the extrusion of peroxide crosslinked polymer parts, mainly tubes, in which the crosslinkable polymer is heated in an extruder in a controlled manner to a value above the crystallite melting point of the polymer, but below the crosslinking temperature, and fed continuously to an extrusion die to create the part and in which at least a partial crosslinking of the polymer is achieved in the extrusion die by heating of the polymer above a crosslinking temperature provision.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: June 8, 2010
    Assignee: Rehau AG & Co.
    Inventors: Karlheinz Winter, Gerhard Dunkel, Günther Seewald, Hermann Zwilling
  • Extrusion of peroxide crosslinkable polymer parts
    Publication number: 20040086592
    Abstract: A process for the extrusion of peroxide crosslinked polymer parts, mainly tubes, in which the crosslinkable polymer is heated in an extruder in a controlled manner to a value above the crystallite melting point of the polymer, but below the crosslinking temperature, and fed continuously to an extrusion die to create the part and in which at least a partial crosslinking of the polymer is achieved in the extrusion die by heating of the polymer above a crosslinking temperature provision.
    Type: Application
    Filed: October 23, 2003
    Publication date: May 6, 2004
    Applicant: Rehau AG & Co.
    Inventors: Karlheinz Winter, Gerhard Dunkel, Gunther Seewald, Hermann Zwilling
  • Pipe cluster unit
    Patent number: 4709730
    Abstract: A pipe cluster unit comprises a plurality of plastic pipes arranged parallel to one another and being in mutual engagement with one another along longitudinal lines of contact to form a pipe cluster and a cover layer bonded to external surface portions of the pipes. The cover layer connects adjoining pipes to one another by bridging the adjoining pipes at locations spaced from respective lines of contact between adjoining pipes.
    Type: Grant
    Filed: December 23, 1986
    Date of Patent: December 1, 1987
    Assignee: Rehau AG & Co.
    Inventor: Hermann Zwilling
  • Method of making a pipe cluster unit
    Patent number: 4588459
    Abstract: A pipe cluster unit comprises a plurality of plastic pipes arranged parallel to one another and being in mutual engagement with one another along longitudinal lines of contact to form a pipe cluster and a cover layer bonded to external surface portions of the pipes. The cover layer connects adjoining pipes to one another by bridging the adjoining pipes at locations spaced from respective lines of contact between adjoining pipes.
    Type: Grant
    Filed: March 9, 1984
    Date of Patent: May 13, 1986
    Assignee: Rehau Plastiks AG & Co.
    Inventor: Hermann Zwilling