Patents by Inventor Harald Krappitz

Harald Krappitz 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).

  • Patent number: 9370795
    Abstract: A method for applying a wear protection layer to a continuous flow machine component which has a base material comprising titanium is provided. The method includes the following steps: mixing a solder which comprises an alloy comprising titanium and particles which are distributed in the alloy and have a reaction agent; applying the solder to predetermined points of the continuous flow machine component; introducing a heat volume into the solder and the continuous flow machine component so that the alloy becomes liquid and the reaction agent changes through diffusion processes with the solder and undergoes a chemical reaction with the alloy, forming a hard aggregate; and cooling the solder so that the alloy becomes solid.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: June 21, 2016
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jochen Barnikel, Susanne Gollerthan, Harald Krappitz, Ingo Reinkensmeier
  • Patent number: 9346131
    Abstract: Solder alloy based on nickel is composed of a mixture with a first soldering material, a second soldering material, and a base material, wherein the base material is a nickel-based material which corresponds to the material to be soldered and is present in a proportion of 45-70% by weight in the mixture, the first soldering material is a nickel-based material including chromium, cobalt, tantalum, aluminum and boron, and is present in a proportion of 15-30% by weight in the mixture, and the second soldering material is a nickel-based material including chromium, cobalt, molybdenum, tungsten, boron and hafnium, and is present in a proportion of 15-25% by weight in the mixture.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: May 24, 2016
    Assignee: MTU Aero Engines AG
    Inventors: Markus Waltemathe, Frank Seidel, Jürgen Rösing, Harald Krappitz
  • Publication number: 20140272464
    Abstract: A method for applying a wear protection layer to a continuous flow machine component which has a base material comprising titanium is provided. The method includes the following steps: mixing a solder which comprises an alloy comprising titanium and particles which are distributed in the alloy and have a reaction agent; applying the solder to predetermined points of the continuous flow machine component; introducing a heat volume into the solder and the continuous flow machine component so that the alloy becomes liquid and the reaction agent changes through diffusion processes with the solder and undergoes a chemical reaction with the alloy, forming a hard aggregate; and cooling the solder so that the alloy becomes solid.
    Type: Application
    Filed: September 21, 2012
    Publication date: September 18, 2014
    Applicant: Siemens Aktiengesellschaft
    Inventors: Jochen Barnikel, Susanne Gollerthan, Harald Krappitz, Ingo Reinkensmeier
  • Publication number: 20140230245
    Abstract: A method for repairing surface damage to a turbomachine component that has a base material which has titanium with the base material having TiAl6V4 and/or pure titanium is provided. The method includes the following steps: mixing a solder that has a titanium-containing alloy and a powder which is distributed in the solder and which has the base material; applying the solder onto turbomachine component areas where the surface damage is located; introducing a quantity of heat into the solder and into the turbomachine component such that the alloy liquefies and the areas are thus wetted; and cooling the solder such that the alloy solidifies.
    Type: Application
    Filed: September 21, 2012
    Publication date: August 21, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Jochen Barnikel, Susanne Gollerthan, Harald Krappitz, Ingo Reinkensmeier
  • Publication number: 20130270325
    Abstract: Solder alloy based on nickel is composed of a mixture with a first soldering material, a second soldering material, and a base material, wherein the base material is a nickel-based material which corresponds to the material to be soldered and is present in a proportion of 45-70% by weight in the mixture, the first soldering material is a nickel-based material including chromium, cobalt, tantalum, aluminum and boron, and is present in a proportion of 15-30% by weight in the mixture, and the second soldering material is a nickel-based material including chromium, cobalt, molybdenum, tungsten, boron and hafnium, and is present in a proportion of 15-25% by weight in the mixture.
    Type: Application
    Filed: June 16, 2011
    Publication date: October 17, 2013
    Applicant: MTU AERO ENGINES GMBH
    Inventors: Markus Waltemathe, Frank Seidel, Jurgen Rosing, Harald Krappitz
  • Patent number: 6299835
    Abstract: Cadmium-free hard solders having working temperatures of less than 630° C., which are easily workable and yield ductile soldered joints, are composed of 30 to 60% by weight of silver, 10 to 36% by weight of copper, 15 to 32% by weight of zinc, 0.5 to 7% by weight of gallium, 0.5 to 7% by weight of tin and 0 to 5% by weight of indium.
    Type: Grant
    Filed: July 12, 1994
    Date of Patent: October 9, 2001
    Assignee: Degussa AG
    Inventors: Wolfgang Weise, Willi Malikowski, Dieter Kaufmann, Harald Krappitz
  • Patent number: 6207300
    Abstract: A process for producing, on a metallic substrate, a geometric metal structure having a precise contour, including the steps of: solder coating a solder paste onto the substrate by screen printing to create the geometric metal structure, the solder paste comprising an organic binder system, and 80 to 95 weight % of a mixture of a nickel-based solder and a pulverulent alloy of nickel with at least one member selected from the group consisting of chromium, molybdenum, tungsten, manganese and iron, provided as a higher-melting metallic filler, wherein a weight ratio of solder to filler is 2-6:1, an average grain size of the solder is between 10 and 50 &mgr;m, and a grain size ratio of solder to filler, relative to the average grain size is from 0.5-2.5:1; drying the structure; decomposing the organic binder system present in the solder paste, without leaving a reside, by a heat treatment; and raising the temperature until the resulting solder material liquifies.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: March 27, 2001
    Assignees: Federal-Mogul Sealing Systems GmbH, Degussa-Hüls Aktiengesellschaft
    Inventors: Jürgen Koch, Manfred Koschlig, Harald Krappitz, Wolfgang Weber, Klaus Lönne, Klaus Schmitt
  • Patent number: 5531962
    Abstract: Cadmium-free brazing solders with working temperatures under 630.degree. C. containing 45 to 80 wt. % silver, 14 to 25 wt. % copper 10 to 25 wt. % gallium, 1 to 7 wt. % zinc and 0 to 5 wt. % indium and/or tin. The alloys have good cold workability and ductility.
    Type: Grant
    Filed: August 3, 1994
    Date of Patent: July 2, 1996
    Assignee: Degussa Aktiengesellschaft
    Inventors: Wolfgang Weise, Alexander Voelcker, Dieter Kaufmann, Willi Malikowski, Joerg Beuers, Harald Krappitz
  • Patent number: 5400946
    Abstract: When hard-substance parts are soldered onto steel bases, thermal stresses are produced between the hard substance and the steel. These stresses can be reduced by means of using a multilayer solder in which the middle layer consists of a precipitation-hardenable copper alloy or nickel alloy provided on both sides with a layer of a hard-solder alloy whose working temperature is at least 50.degree. C. below the melting point of the precipitation-hardenable copper alloy or nickel alloy. A tempering treatment at 250.degree. to 550.degree. C. is carried out after the soldering in order to achieve a precipitation hardening of the middle layer.
    Type: Grant
    Filed: October 27, 1993
    Date of Patent: March 28, 1995
    Assignee: Degussa Aktiengesellschaft
    Inventors: Wolfgang Weise, Harald Krappitz, Willi Malikowski
  • Patent number: 5346119
    Abstract: Parts subject to wear having coatings made of hard substances formed by subdividing the protective layer into segmented joint faces and wherein the joint faces interlace to form seams that are as close as possible to each other.
    Type: Grant
    Filed: March 31, 1993
    Date of Patent: September 13, 1994
    Assignee: Degussa Aktiengesellschaft
    Inventors: Manfred Koschlig, Harald Krappitz
  • Patent number: 5341981
    Abstract: Cadmium-free brazing solders with working temperatures under 630.degree. C. containing 45 to 80 wt. % silver, 5 to 13 wt. % copper, 10 to 25 wt. % gallium, 8 to 20 wt. % zinc, and 0 to 5 wt. % indium and/or tin.
    Type: Grant
    Filed: September 1, 1993
    Date of Patent: August 30, 1994
    Assignee: Degussa Aktiengesellschaft
    Inventors: Wolfgang Weise, Alexander Voelcker, Dieter Kaufmann, Willi Malikowski, Joerg Beuers, Harald Krappitz