Patents by Inventor Franz Lachenwitzer

Franz Lachenwitzer 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).

  • Eccentric screw pump having conical sealing surfaces
    Patent number: 7618246
    Abstract: The aim of the invention is to improve the sealing possibilities between the elastic stator lining and corresponding connecting flanges of eccentric screw pumps. In order to increase the sealing surfaces, the stator lining comprises, at least at one of its ends, a conical sealing surface which may be provided with one or more prominent or recessed parts.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: November 17, 2009
    Assignee: Netzsch-Mohnopumpen GmbH
    Inventors: Herbert Frisch, Franz Lachenwitzer, Michael Robby
  • Eccentric Screw Pump Having Conical Sealing Surfaces
    Publication number: 20070128062
    Abstract: The aim of the invention is to improve the sealing possibilities between the elastic stator lining and corresponding connecting flanges of eccentric screw pumps. In order to increase the sealing surfaces, the stator lining comprises, at least at one of its ends, a conical sealing surface which may be provided with one or more prominent or recessed parts.
    Type: Application
    Filed: February 7, 2007
    Publication date: June 7, 2007
    Inventors: Herbert Frisch, Franz Lachenwitzer, Michael Robby
  • Eccentric screw-type pump with spare stator
    Patent number: 7104770
    Abstract: The present invention relates to the arrangement of a stator and a spare stator. In order to avoid a permanent correction in the length of the driving shaft, the spare stator is connected to the instantaneously operated stator or is configured in a single piece. Upon occurrence of a defined amount of wear, this stator combination is merely reversed through 180° relative to the longitudinal axis or an intermediate tube is inserted so that the spare stator arrives in the rotor region.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: September 12, 2006
    Assignee: NETZSCH-Mohnopumpen GmbH
    Inventors: Helmut Bauer, Christoph Boehnisch, Reinhard Denk, Matthias Gradl, Michael Groth, Guido Gutmann, Guenther Hantschk, Siegfried Jarzina, Franz Kneidl, Johann Kreidl, Robert Kurz, Franz Lachenwitzer, Uwe Neumann, Hansjuergen Linde, Thomas Ribbe, Michael Robby, Karl-Heinz Rosner, Matthias Schaefer, Thomas Streubel, Alfred Thumser
  • Eccentric screw-type pump with spare stator
    Publication number: 20050100468
    Abstract: The present invention relates to the arrangement of a stator and a spare stator. In order to avoid a permanent correction in the length of the driving shaft, the spare stator is connected to the instantaneously operated stator or is configured in a single piece. Upon occurrence of a defined amount of wear, this stator combination is merely reversed through 180° relative to the longitudinal axis or an intermediate tube is inserted so that the spare stator arrives in the rotor region.
    Type: Application
    Filed: September 22, 2003
    Publication date: May 12, 2005
    Inventors: Helmut Bauer, Christoph Boehnisch, Reinhard Denk, Matthias Gradl, Michael Groth, Guido Gutmann, Guenther Hantschk, Siegfried Jarzina, Franz Kneidl, Johann Kreidl, Robert Kurz, Franz Lachenwitzer, Uwe Neumann, Hansjuergen Linde, Thomas Ribbe, Michael Robby, Karl-Heinz Rosner, Matthias Schaefer, Thomas Streubel, Alfred Thumser