Patents by Inventor Dimitrios Thomaidis

Dimitrios Thomaidis 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).

  • Publication number: 20250012524
    Abstract: A heat exchanger, in particular a tubular heat exchanger, a tube bundle heat exchanger, a finned tube heat exchanger and a plate heat exchanger, having at least one elongate flow duct through which a fluid is conducted during operation in a main flow direction corresponding to the longitudinal extent of the flow duct. The at least one flow duct has internal components and/or design features which give the fluid flowing in the main flow direction a swirl in a circumferential direction of the flow duct. A heat pump includes at least one such heat exchanger.
    Type: Application
    Filed: November 29, 2022
    Publication date: January 9, 2025
    Applicant: Siemens Energy Global GmbH & Co. KG
    Inventors: Philipp Cavadini, Marten Lorenz, Dimitrios Thomaidis
  • Publication number: 20180272450
    Abstract: Ceramics or ceramic layer systems can be machined due to the use of high speeds of an EDM electrode. Disclosed is a method and an EDM device for carrying out the method for drilling ceramics or ceramic-coated components, which uses an EDM electrode and wherein the EDM electrode is rotated at a speed of at least 1000 rpm, in particular of at least 10,000 rpm, for drilling through the ceramic or through the ceramic-coated component.
    Type: Application
    Filed: September 7, 2016
    Publication date: September 27, 2018
    Inventors: Susanne Kamenzky, Jan Münzer, Dimitrios Thomaidis
  • Publication number: 20170051614
    Abstract: Cooling holes in a turbine component, such as a blade, vane or combustor transition, are formed in and surrounded by a micro surface feature (MSF) that protects the adjoining thermal barrier coating (TBC) from delamination or crack propagation during the hole formation or during engine operation. The MSF effectively functions as a circumferential sleeve around the cooling hole margin so that relatively more friable TBC material that would otherwise define the cooling hole margin is not directly exposed to coolant fluid exhausting the hole, foreign object damage (FOD) or contact with cooling hole formation tooling when fabricating the hole through the TBC layer. The MSF is formed as a projection from the component substrate or during subsequent application of a metallic bond coat (BC) layer.
    Type: Application
    Filed: February 18, 2015
    Publication date: February 23, 2017
    Inventors: Gary B. Merrill, Jr., Dimitrios Thomaidis, Jonathan E. Shipper, Jr.
  • Patent number: 9556748
    Abstract: Known protective coatings with a high Cr-content and silicon as an additive have brittle phases which become additionally brittle under the influence of carbon during use. The protective coating herein has a double metallic layer that only contains tantalum on the outside contents of the layers.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: January 31, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Georg Bostanjoglo, Axel Kaiser, Werner Stamm, Jan Steinbach, Dimitrios Thomaidis
  • Patent number: 9435222
    Abstract: Known protective layers having high Cr content and additional silicon form brittle phases, which additionally become brittle under the effect of carbon during use. The protective layer according to the invention comprises a two-part metal layer, which contains tantalum on the outside.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: September 6, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Georg Bostanjoglo, Axel Kaiser, Werner Stamm, Jan Steinbach, Dimitrios Thomaidis
  • Patent number: 9403245
    Abstract: A method is provided for treating turbine blades having holes for discharging cooling air. A protective layer is provided and then the holes that are partly or completely closed by the protective layer are opened again. Coordinates concerning the position of the holes are acquired before the protective layer is applied using a laser triangulation sensor using a light source generating a light beam and a light detector. The data obtained is used after application of the protective layer to control a removal device for removing protective layer partly or wholly covering the holes. Each hole is measured by the light beam being shone into the hole in different positions in relation to the longitudinal mid-axis of the latter. The light beam is shone into the respective hole in a plane at at least three different angles to the longitudinal mid-axis thereof.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: August 2, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Nikolai Arjakine, Torsten Melzer-Jokisch, Dimitrios Thomaidis
  • Patent number: 8996156
    Abstract: A method and system for automated repair of a machine component is provided. According to the proposed method, a first geometry of the component, including a damaged portion of the component, is digitalized. A trough is then machined over the damaged portion of the component. The machining is numerically controlled using digitalized geometrical data of the first geometry of the component. A second geometry of the component is then digitalized subsequent to the machining, the second geometry including the trough. Subsequently, a material is deposited over the trough. The deposition of the material is numerically controlled digitalized geometrical data of the second geometry of the component.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: March 31, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Torsten Melzer-Jokisch, Dimitrios Thomaidis, Rolf Wilkenhöner
  • Patent number: 8980372
    Abstract: During the coating of a component including cooling-air holes, it is necessary, when remachining the coated cooling-air holes, to determine the correct alignment of the cooling-air row. A process is provided in that at least two cooling-air holes are kept clear by a masking material during the coating and the alignment of the cooling-air row is effected on the basis of these two unclosed cooling-air hole.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: March 17, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Francis-Jurjen Ladru, Andrea Massa, Torsten Melzer-Jokisch, Ralf Motzkus, Andreas Oppert, Dimitrios Thomaidis
  • Publication number: 20140342186
    Abstract: Known protective coatings with a high Cr-content and silicon as an additive have brittle phases which become additionally brittle under the influence of carbon during use. The protective coating herein has a double metallic layer that only contains tantalum on the outside contents of the layers.
    Type: Application
    Filed: September 12, 2011
    Publication date: November 20, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Georg Bostanjoglo, Axel Kaiser, Werner Stamm, Jan Steinbach, Dimitrios Thomaidis
  • Publication number: 20140234662
    Abstract: Known protective layers having high Cr content and additional silicon form brittle phases, which additionally become brittle under the effect of carbon during use. The protective layer according to the invention comprises a two-part metal layer, which contains tantalum on the outside.
    Type: Application
    Filed: July 8, 2011
    Publication date: August 21, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Georg Bostanjoglo, Axel Kaiser, Werner Stamm, Jan Steinbach, Dimitrios Thomaidis
  • Publication number: 20140191017
    Abstract: The invention relates to a novel alloy which comprises the elements carbon (C), chromium (Cr), cobalt (Co), molybdenum (Mo), tungsten (W), titanium (Ti), aluminium (Al), boron (B), and zirconium (Zr), based on nickel, and which has a very low tendency to form cracks during welding.
    Type: Application
    Filed: June 13, 2012
    Publication date: July 10, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Nikolai Arjakine, Torsten Jokisch, Andreas Neidel, Michael Ott, Sebastian Piegert, Dimitrios Thomaidis
  • Publication number: 20140130999
    Abstract: A process is provided for forming an airfoil for a gas turbine engine involving: forming a casting of a gas turbine engine airfoil having a main wall and an interior cavity, the main wall having a wall thickness extending from an external surface of the outer wall to the interior cavity, an outer section of the main wall extending from a location between a base and a tip of the airfoil casting to the tip having a wall thickness greater than a final thickness. The process may further involve effecting movement, using a computer system, of a material removal apparatus and the casting relative to one another such that a layer of material is removed from the casting at one or more radial portions along the main wall of the casting.
    Type: Application
    Filed: November 13, 2012
    Publication date: May 15, 2014
    Inventors: Christian X. Campbell, Dimitrios Thomaidis
  • Patent number: 8720526
    Abstract: A process is provided for forming an airfoil for a gas turbine engine involving: forming a casting of a gas turbine engine airfoil having a main wall and an interior cavity, the main wall having a wall thickness extending from an external surface of the outer wall to the interior cavity, an outer section of the main wall extending from a location between a base and a tip of the airfoil casting to the tip having a wall thickness greater than a final thickness. The process may further involve effecting movement, using a computer system, of a material removal apparatus and the casting relative to one another such that a layer of material is removed from the casting at one or more radial portions along the main wall of the casting.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: May 13, 2014
    Assignee: Siemens Energy, Inc.
    Inventors: Christian X. Campbell, Dimitrios Thomaidis
  • Publication number: 20140099476
    Abstract: A method for additive manufacturing with multiple materials. First (48), second (50), and third (52) adjacent powder layers are delivered onto a working surface (54A) in respective first (73), second (74), and third (75) area shapes of adjacent final materials (30, 44, 45) in a given section plane of a component (20). The first powder may be a structural metal delivered in the sectional shape of an airfoil substrate (30). The second powder may be a bond coat material delivered in a sectional shape of a bond coat (45) on the substrate. The third powder may be a thermal barrier ceramic delivered in a section shape of the thermal barrier coating (44). A particular laser intensity (69A, 69B) is applied to each layer to melt or to sinter the layer. Integrated interfaces (57, 77, 80) may be formed between adjacent layers by gradient material overlap and/or interleaving projections.
    Type: Application
    Filed: October 1, 2013
    Publication date: April 10, 2014
    Inventors: Ramesh Subramanian, Michael Ott, Dimitrios Thomaidis, Alexandr Sadovoy, Jan Münzer
  • Publication number: 20130268107
    Abstract: By means of laser triangulation measurements of an uncoated and a coated component having holes, the exact positions of the holes can be detected for reopening after coating. A method for the surface analysis of at least partially closed holes which are to be opened is provided. A process for reopening coated holes is also provided.
    Type: Application
    Filed: May 9, 2011
    Publication date: October 10, 2013
    Inventors: Georg Bostanjoglo, Torsten Melzer-Jokisch, Andreas Oppert, Dimitrios Thomaidis
  • Publication number: 20130180108
    Abstract: A method is provided for treating turbine blades having holes for discharging cooling air. A protective layer is provided and then the holes that are partly or completely closed by the protective layer are opened again. Coordinates concerning the position of the holes are acquired before the protective layer is applied using a laser triangulation sensor using a light source generating a light beam and a light detector. The data obtained is used after application of the protective layer to control a removal device for removing protective layer partly or wholly covering the holes. Each hole is measured by the light beam being shone into the hole in different positions in relation to the longitudinal mid-axis of the latter. The light beam is shone into the respective hole in a plane at at least three different angles to the longitudinal mid-axis thereof.
    Type: Application
    Filed: September 14, 2011
    Publication date: July 18, 2013
    Inventors: Nikolai Arjakine, Torsten Melzer-Jokisch, Dimitrios Thomaidis
  • Patent number: 8437010
    Abstract: A process for determining the position of closed holes in a component is provided. By carrying out laser triangulation measurements on an uncoated component and a coated component with holes, the exact position of the holes to be reopened may be detected following the coating. A device used to carry out this process is also provided.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: May 7, 2013
    Assignees: Siemens Aktiengesellschaft, Chromalloy Gas Turbine LLC
    Inventors: Georg Bostanjoglo, Torsten Melzer-Jokisch, Andreas Oppert, Dimitrios Thomaidis
  • Publication number: 20120268747
    Abstract: A process for determining the position of closed holes in a component is provided. By carrying out laser triangulation measurements on an uncoated component and a coated component with holes, the exact position of the holes to be reopened may be detected following the coating. A device used to carry out this process is also provided.
    Type: Application
    Filed: October 13, 2010
    Publication date: October 25, 2012
    Inventors: Georg Bostanjoglo, Torsten Melzer-Jokisch, Andreas Oppert, Dimitrios Thomaidis
  • Publication number: 20120263866
    Abstract: A method for determining the layer thickness of a component to be coated is provided. The monitoring of the process is automated by carrying out laser triangulation measurement before and after the coating of the component. At least one reference point on the component is used to determine the distortion of the blade or vane. A device for carrying out the method is also provided.
    Type: Application
    Filed: June 21, 2010
    Publication date: October 18, 2012
    Inventors: Torsten Melzer-Jokisch, Andreas Oppert, Dimitrios Thomaidis
  • Publication number: 20120228269
    Abstract: A process of electrical discharge machining using a wire electrode is provided. The use of a thick wire electrode means that the surface can be machined considerably more accurately. The wire electrode has a diameter of at least 2.0 mm. In a first step for machining the surface, a rough contour is produced on the component.
    Type: Application
    Filed: November 10, 2010
    Publication date: September 13, 2012
    Inventors: Dimitrios Thomaidis, Rene Weisheit