Patents by Inventor Ralf-Dieter Krause

Ralf-Dieter Krause 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).

  • Sinter contact material for low voltage switching apparatus of the energy technology, in particular for motor contactors
    Patent number: 4980125
    Abstract: Sinter materials having the constitution AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO produced from an intraoxidized alloy powder have added thereto bismuth zirconate and/or bismuth titanate in parts by weight of preferably between 0.1 and 5%. For the production of these materials, bismuth zirconate and/or bismuth titanate is added as a separate powder to the intraoxidized alloy powder of AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO. With such a contact material, the excess temperature behavior in motor contactors is significantly improved.
    Type: Grant
    Filed: November 17, 1989
    Date of Patent: December 25, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wolfgang Haufe, Ralf-Dieter Krause, Bernhard Rothkegel, deceased
  • Method for the production of a component with a filled layer
    Patent number: 4913932
    Abstract: The invention relates to a method for the production of a filled layer component made out of a monolithic ceramic body by impregnating a ceramic layer body of dense and porous layers with liquid impregnating material which wets the ceramic and by applying contacts. According to the invention the contacts are applied following the impregnation process without any further intermediate steps, and an electrical bonding of the contacts to the metal filler takes place.
    Type: Grant
    Filed: August 18, 1987
    Date of Patent: April 3, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Moser, Klaus Otto, Horst Kippenberg, Ralf-Dieter Krause