Patents by Inventor Hartmut Kaiser

Hartmut Kaiser 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).

  • Extruder housing for a double-worm extruder and method of making same
    Patent number: 5223345
    Abstract: An extruder-housing part for a double-worm extruder for the plastification of thermoplastic synthetic resin and plastic mixtures has two chambers for receiving the worms and forming a figure eight cavity. A wear-resistant material formed as a hard-phase layer is provided to line the chambers. The extruder-housing part is a one-piece seamless structure with an isotropic lattice of powder metallurgical origin with a hot isostatic pressing configuration.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: June 29, 1993
    Assignee: Reifenhauser GmbH & Co. Maschinenfabrik
    Inventors: Hartmut Kaiser, Peter Lulsdorf
  • Extruder housing for a double-worm extruder and method of making same
    Patent number: 5116135
    Abstract: An extruder-housing part for a double-worm extruder for the plastification of thermoplastic synthetic resin and plastic mixtures has two chambers for receiving the worms and forming a figure eight cavity. A wear-resistant material formed as a hard-phase layer is provided to line the chambers. The extruder-housing part is a one-piece seamless structure with an isotropic lattice of powder metallurgical origin with a hot isostatic pressing configuration.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: May 26, 1992
    Assignee: Reifenhauser GmbH & Co. Maschinenfabrik
    Inventors: Hartmut Kaiser, Peter Lulsdorf