Patents by Inventor Andreas Gebhardt
Andreas Gebhardt 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).
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Patent number: 11920965Abstract: A method for determining a temperature of a fluid flowing through a pipe section includes: determining a temperature of the pipe section; obtaining a reference temperature at a distance from a surface of the pipe section; determining a heat transfer behaviour, in particular a thermal resistance, of a boundary layer of the fluid on an inner wall of the pipe section based on at least one material property and/or at least one value of a state variable of the fluid; and determining the temperature of the fluid based on the heat transfer behaviour of the boundary layer, a heat transfer behavior, in particular a thermal resistance, of the pipe section, the temperature of the pipe section, and the reference temperature.Type: GrantFiled: September 7, 2020Date of Patent: March 5, 2024Assignee: ABB Schweiz AGInventors: Joerg Gebhardt, Guruprasad Sosale, Andreas Decker, Wilhelm Daake, Juergen Horstkotte, Peter Ude, Paul Szasz, Ulf Ahrend
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Publication number: 20230249379Abstract: A method for forming a multi-layer blank of a ceramic material including the steps of: providing a mold that includes at least one side wall surrounding a lower press plunger to form a cavity therebetween, wherein the lower press plunger has a movable pin; filling into the mold a first ceramic material; extending the movable pin from an upper surface of the lower press plunger and into the cavity; pressing a first upper press plunger against the first ceramic material so that a first open cavity is formed while at least a portion of the first upper press plunger is in contact with the movable pin to maintain the through-hole through the first layer; filling into the mold a second ceramic material of a different composition; extending the movable pin from an upper surface of the first layer and into the first open cavity; and pressing a second upper press plunger against the second layer so that a second open cavity is formed in communication with the through-hole that extends through the first and second layeType: ApplicationFiled: February 4, 2022Publication date: August 10, 2023Applicant: DENTSPLY SIRONA INC.Inventors: Stefan FECHER, Lothar VÖLKL, Sven GIESE, Tobias RÖSCH, Andreas GEBHARDT
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Publication number: 20220175500Abstract: A blank for milling or grinding a dental article, the blank having a plate-shaped body adapted to be received in a blank holder of a CAM system, which plate-shaped body comprises one or more ceramic or glass ceramic blank portions and two or more through holes, wherein each through hole is contiguous with at least one of the ceramic or glass ceramic blank portions for receiving a working end of a milling or grinding tool of the CAM system.Type: ApplicationFiled: March 11, 2020Publication date: June 9, 2022Applicant: DENTSPLY SIRONA Inc.Inventors: Stefan FECHER, Lothar VÖLKL, Markus VOLLMANN, Andreas GEBHARDT
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Publication number: 20210290351Abstract: The present invention is related to a method for the manufacture of a multilayer blank, having a lowermost layer and a topmost layer, of a ceramic material, where layers of different compositions are introduced layer-by-layer into a mold, compressed and then sintered and where individual layers contain at least one coloring oxide, wherein as a first coloring oxide as the one coloring oxide at least one oxide from the group Co, Mn, Ni, Cr is used, the proportion of which in the lowermost layer containing the first coloring oxide is lower than in the topmost layer containing the first coloring oxide: and at least one oxide from the group Pr, Er, Fe, Ti, V, Bi, Cu, Tb is used as the second coloring oxide, the proportion of which in the lowermost layer containing the second coloring oxide is greater than that in the topmost layer.Type: ApplicationFiled: August 1, 2019Publication date: September 23, 2021Applicant: DENTSPLY SIRONA Inc.Inventors: Lothar VOELKL, Stefan FECHER, Martin KUTZNER, Tanja OEFNER, Christian KOHLER, Tobias KRANZ, Andreas GEBHARDT, Martin HAIZMANN, Heiner HOERHOLD, Andrea BURNS
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Publication number: 20210220958Abstract: A method for manufacturing an optical system with an optical component made of a brittle-hard material is described, comprising the steps of; producing at least one optical functional surface at the optical component; mounting of the optical component on a processing machine and producing several reference surfaces and mounting surfaces at the optical component or at least one insert body permanently connected to the optical component by at least one machining tool of the processing machine; measuring the shape and position of the optical functional surface in a coordinate system related to the reference surfaces; performing a correction machining at least once, in which the shape and position deviation of the optical functional surface relative to the reference and mounting surfaces is reduced; and installation of the optical component in a housing structure of the optical system at the mounting surfaces.Type: ApplicationFiled: July 3, 2019Publication date: July 22, 2021Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.Inventors: Matthias BEIER, Stefan RISSE, Andreas GEBHARDT
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Patent number: 10799326Abstract: The invention relates to a method for positioning a blank (116), which after insertion in a holder is in contact therewith, wherein the holder has a structural element. The blank (16) is positioned in the holder by way of an adapter (118), which is inserted in both the holder or the structural element and the blank, wherein the adapter positively engages with the holder or the structural element and with the blank.Type: GrantFiled: August 8, 2017Date of Patent: October 13, 2020Assignee: DENTSPLY SIRONA INC.Inventors: Andreas Gebhardt, Stefan Fecher, Lothar Volkl
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Publication number: 20190076222Abstract: The invention relates to a blank for the production of a molded body, in particular a dental reconstruction. The blank has a base and at least one region that emanates therefrom and projects above the base, from which at least a part of the molded body can be derived by working.Type: ApplicationFiled: September 12, 2017Publication date: March 14, 2019Applicant: DENTSPLY SIRONA Inc.Inventors: Lothar VOLKL, Stefan FECHER, Andreas GEBHARDT
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Publication number: 20190046305Abstract: The invention relates to a method for positioning a blank (116), which after insertion in a holder is in contact therewith, wherein the holder has a structural element. The blank (16) is positioned in the holder by means of an adapter (118), which is inserted in both the holder or the structural element and the blank, wherein the adapter positively engages with the holder or the structural element and with the blank.Type: ApplicationFiled: August 8, 2017Publication date: February 14, 2019Applicant: DENTSPLY SIRONA Inc.Inventors: Andreas GEBHARDT, Stefan FECHER, Lothar VOLKL
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Patent number: 10105200Abstract: The invention relates to a method for producing a dental model for removable insertion in a recess of a holder, which dental model has a referencing, comprising at least one tooth part having a base to be inserted into the recess, wherein the at least one tooth part is produced using digitized data of a jaw in that the digitized data are saved in a computer beforehand and supplied to a processing machine to produce the at least one tooth part. In order to ensure simple handling of the dental model and in particular to prevent faulty insertion of the dental model or segment, according to the invention the referencing is saved in the computer and, in consideration of the referencing, the at least one tooth part is produced as having the base as a unit.Type: GrantFiled: December 21, 2012Date of Patent: October 23, 2018Assignee: DEGUDENT GMBHInventors: Stefan Fecher, Andreas Gebhardt, Martin Haizmann, Heiner Horhold, Elmar Hock, Lothar Volkl
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Patent number: 9599756Abstract: The invention relates to a method for manufacturing a light weight optical mirror or a monolithic mirror comprising at least one cooling channel, the method comprising forming a mirror body by iteratively depositing a metallic powder in layers and applying, for each of the layers, heat at least in a subarea of this layer, thereby fusing or sintering the powder in this subarea and bonding it to a previously deposited layer, the powder remaining in an unfused state in at least one region, the method further comprising forming at least one cavity within the carrier by removing the unfused powder from said region and producing a mirror surface at a closed surface of the mirror body. The invention further relates to an optical mirror and to an optical device.Type: GrantFiled: August 1, 2011Date of Patent: March 21, 2017Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Sebastian Scheiding, Andreas Gebhardt, Christoph Damm, Michael Scheiding, Stefan Risse
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Patent number: 9296161Abstract: The invention relates to a method for producing an optical assembly, comprising at least two optical functional surfaces arranged in a fixed positional relationship to one another on a common supporting structure, wherein by means of a processing machine, in various process steps, at least two optical functional surfaces and at least one reference structure having a defined and measurable relative position to the optical functional surfaces are produced. The supporting structure remains rigidly connected to the processing machine until said process steps have been completed, and wherein the optical functional surfaces are then measured relative to the at least one reference structure, and any deviation from a target shape and target position is determined, after which said process steps are repeated at least once with modified actuation of the processing machine. The invention further relates to an optical device comprising an optical assembly produced in this way and to a unit for carrying out such a method.Type: GrantFiled: September 13, 2010Date of Patent: March 29, 2016Assignees: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Friedrich-Schiller-Universität JenaInventors: Sebastian Scheiding, Stefan Risse, Andreas Gebhardt, Christoph Damm, Thomas Peschel, Ralf Steinkopf
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Publication number: 20150010880Abstract: The invention relates to a method for producing a dental model for removable insertion in a recess of a holder, which dental model has a referencing, comprising at least one tooth part having a base to be inserted into the recess, wherein the at least one tooth part is produced using digitized data of a jaw in that the digitized data are saved in a computer beforehand and supplied to a processing machine to produce the at least one tooth part. In order to ensure simple handling of the dental model and in particular to prevent faulty insertion of the dental model or segment, according to the invention the referencing is saved in the computer and, in consideration of the referencing, the at least one tooth part is produced as having the base as a unit.Type: ApplicationFiled: December 21, 2012Publication date: January 8, 2015Inventors: Stefan Fecher, Andreas Gebhardt, Martin Haizmann, Heiner Horhold, Elmar Hock, Lothar Volkl
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Publication number: 20140247512Abstract: The invention relates to a method for manufacturing a light weight optical mirror or a monolithic mirror comprising at least one cooling channel, the method comprising forming a mirror body by iteratively depositing a metallic powder in layers and applying, for each of the layers, heat at least in a subarea of this layer, thereby fusing or sintering the powder in this subarea and bonding it to a previously deposited layer, the powder remaining in an unfused state in at least one region, the method further comprising forming at least one cavity within the carrier by removing the unfused powder from said region and producing a mirror surface at a closed surface of the mirror body. The invention further relates to an optical mirror and to an optical device.Type: ApplicationFiled: August 1, 2011Publication date: September 4, 2014Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.Inventors: Sebastian Scheiding, Andreas Gebhardt, Christoph Damm, Michael Scheiding, Stefan Risse
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Publication number: 20130057952Abstract: The invention relates to a substrate made of an aluminium-silicon alloy or crystalline silicon to which a polishable layer is applied and also to a metal mirror which comprises this substrate. Furthermore, the invention relates to a method for the production of metal mirrors and also the use of the metal mirror according to the invention.Type: ApplicationFiled: September 9, 2010Publication date: March 7, 2013Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Stefan Risse, Andreas Gebhardt, Thomas Peschel, Wieland Stockl
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Publication number: 20120236400Abstract: The invention relates to a method for producing an optical assembly, comprising at least two optical functional surfaces arranged in a fixed positional relationship to one another on a common supporting structure, wherein by means of a processing machine, in various process steps, at least two optical functional surfaces and at least one reference structure having a defined and measurable relative position to the optical functional surfaces are produced. The supporting structure remains rigidly connected to the processing machine until said process steps have been completed, and wherein the optical functional surfaces are then measured relative to the at least one reference structure, and any deviation from a target shape and target position is determined, after which said process steps are repeated at least once with modified actuation of the processing machine. The invention further relates to an optical device comprising an optical assembly produced in this way and to a unit for carrying out such a method.Type: ApplicationFiled: September 13, 2010Publication date: September 20, 2012Applicant: Friedrich-Schiller-Universitat JenaInventors: Sebastian Scheiding, Stefan Risse, Andreas Gebhardt, Christoph Damm, Thomas Peschel, Ralf Steinkopf
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Patent number: 7491946Abstract: The invention is directed to electrostatic deflection systems for corpuscular beams which can be used particularly in microstructured and nanostructured applications in lithography installations or measuring equipment. According to the proposed object of the invention, the individual electrodes of a deflection system of this kind should permanently have and retain a very exact axially symmetric arrangement relative to one another. In the electrostatic deflection system according to the invention, rod-shaped electrodes are held in an axially symmetric arrangement in an inwardly hollow carrier through which a corpuscular beam can be directed. The carrier is formed of at least two, and at most four, carrier members which are connected to one another.Type: GrantFiled: February 3, 2006Date of Patent: February 17, 2009Assignee: Leica Microsystems Lithography GmbHInventors: Stefan Risse, Thomas Peschel, Christoph Damm, Andreas Gebhardt, Mathias Rohde, Christoph Schenk, Thomas Elster, Hans-Joachim Doering, Gerhard Schubert
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Publication number: 20060192133Abstract: The invention is directed to electrostatic deflection systems for corpuscular beams which can be used particularly in microstructured and nanostructured applications in lithography installations or measuring equipment. According to the proposed object of the invention, the individual electrodes of a deflection system of this kind should permanently have and retain a very exact axially symmetric arrangement relative to one another. In the electrostatic deflection system according to the invention, rod-shaped electrodes are held in an axially symmetric arrangement in an inwardly hollow carrier through which a corpuscular beam can be directed. The carrier is formed of at least two, and at most four, carrier members which are connected to one another.Type: ApplicationFiled: February 3, 2006Publication date: August 31, 2006Inventors: Stefan Risse, Thomas Peschel, Christoph Damm, Andreas Gebhardt, Mathias Rohde, Christoph Schenk, Thomas Elster, Hans-Joachim Doering, Gerhard Schubert
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Patent number: 7013652Abstract: A gas turbo set comprises a compressor, combustion chamber and turbine, a common rotor shaft having arranged on it, within the compressor, a plurality of rows of compressor moving blades and, within the turbine, a plurality of rows of turbine moving blades, which alternate with guide vane rows of compressor guide vanes and turbine guide vanes fastened to a carrying structure surrounding the rotor shaft on the outside. Simplified mounting/demounting is achieved with the compressor guide vanes and/or the turbine guide vanes of a guide vane row held in each case in a plurality of separate annular segments together forming a complete ring with at least one guide vane row, and with the annular segments fastened releasably to the carrying structure such that the annular segments, together with the compressor or turbine guide vanes fastened to them, can be removed individually from the carrying structure, while maintaining the carrying structure.Type: GrantFiled: May 19, 2004Date of Patent: March 21, 2006Assignee: ALSTOM Technology LtdInventor: Andreas Gebhardt
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Publication number: 20050132707Abstract: A gas turbo set comprises a compressor, combustion chamber and turbine, a common rotor shaft having arranged on it, within the compressor, a plurality of rows of compressor moving blades and, within the turbine, a plurality of rows of turbine moving blades, which alternate with guide vane rows of compressor guide vanes and turbine guide vanes fastened to a carrying structure surrounding the rotor shaft on the outside. Simplified mounting/demounting is achieved with the compressor guide vanes and/or the turbine guide vanes of a guide vane row held in each case in a plurality of separate annular segments together forming a complete ring with at least one guide vane row, and with the annular segments fastened releasably to the carrying structure such that the annular segments, together with the compressor or turbine guide vanes fastened to them, can be removed individually from the carrying structure, while maintaining the carrying structure.Type: ApplicationFiled: May 19, 2004Publication date: June 23, 2005Inventor: Andreas Gebhardt