Patents by Inventor Stefan Oelmann
Stefan Oelmann 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: 11162178Abstract: An electrode of an electrolysis cell for gas-producing electrochemical processes, which includes a plurality of horizontal lamella elements which in the manner of a flat C-profile consist of a flat central part and one or more flank parts, where one or more transition regions of any shape are arranged between the flat central part and the one or more flank parts, where the lamella elements have a plurality of through-openings, where the lamella elements have a flat surface without structural raised regions and depressions and the flat central part has a plurality of through-openings which are arranged in rows and arranged diagonally to one another.Type: GrantFiled: November 28, 2012Date of Patent: November 2, 2021Assignee: UHDENORA S.P.A.Inventors: Karl-Heinz Dulle, Frank Funck, Dirk Hoormann, Stefan Oelmann, Peter Woltering, Carsten Schmitt, Philipp Hofmann
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Patent number: 10030300Abstract: A method for coating a substrate on one or more sides having catalytically active material producible by material deposition under vacuum in a vacuum chamber, using the following steps: loading a substrate in the chamber evacuating the chamber, cleaning the substrate by introducing a gaseous reducing agent, removing the gaseous reducing agent, applying an intermediate layer by means of vacuum arc evaporation, wherein a substrate comprising the same or similar material is introduced into the vacuum chamber, controlling the chamber temperature, coating by vacuum arc evaporation, a metal taken from the group ruthenium, iridium, titanium and mixtures thereof while oxygen is supplied, in a last step the coated substrate is removed from the chamber, wherein at least 99% of the substrate coating is free of constituents originally contained in the substrate itself, and at least 99% of the coating applied on the intermediate layer is kept free of non-oxidized metals.Type: GrantFiled: May 23, 2011Date of Patent: July 24, 2018Assignee: THYSSENKRUPP INDUSTRIAL SOLUTIONS AGInventors: Karl-Heinz Dulle, Frank Funck, Dirk Hoormann, Stefan Oelmann, Peter Woltering, Carsten Schmitt, Philipp Hofmann, Ulf-Steffen Baeumer
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Patent number: 8945358Abstract: The invention relates to an electrolysis cell of the single-element type design for chlor-alkali electrolysis plants, comprising an anode compartment and a cathode compartment, each of the two compartments containing an electrode connected to the rear wall of the respective compartment by means of parallel bars. The electrodes are thus subdivided into several sections. In accordance with the invention, at least one of two electrodes is provided with a curved shape in each section, this curved section protruding towards the opposite electrode and pressing a membrane area against the opposite electrode. According to a preferred embodiment, the curved shape of the various electrode sections is obtained by means of springs.Type: GrantFiled: September 27, 2007Date of Patent: February 3, 2015Assignee: Uhdenora S.p.A.Inventors: Peter Woltering, Karl Heinz Dulle, Randolf Kiefer, Stefan Oelmann, Ulf-Steffen Bäumer
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Publication number: 20130206584Abstract: A method for coating a substrate on one or more sides having catalytically active material producible by material deposition under vacuum in a vacuum chamber, using the following steps: loading a substrate in the chamber evacuating the chamber, cleaning the substrate by introducing a gaseous reducing agent, removing the gaseous reducing agent, applying an intermediate layer by means of vacuum arc evaporation, wherein a substrate comprising the same or similar material is introduced into the vacuum chamber, controlling the chamber temperature, coating by vacuum arc evaporation, a metal taken from the group ruthenium, iridium, titanium and mixtures thereof while oxygen is supplied, in a last step the coated substrate is removed from the chamber, wherein at least 99% of the substrate coating is free of constituents originally contained in the substrate itself, and at least 99% of the coating applied on the intermediate layer is kept free of non-oxidized metals.Type: ApplicationFiled: May 23, 2011Publication date: August 15, 2013Applicant: THYSSENKRUPP UHDE GMBHInventors: Karl-Heinz Dulle, Frank Funck, Dirk Hoormann, Stefan Oelmann, Peter Woltering, Carsten Schmitt, Philipp Hofmann, Ulf-Steffen Baeumer
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Patent number: 8444833Abstract: The invention relates to an electrolysis device for cleaning acidic waters which comprises a cathode, an anode, and an ion exchange membrane, wherein the membrane is arranged between the cathode and the anode and is attached at least along the entire circumference of its rim, wherein many inlets and outlets are arranged along the upper and lower rim of the electrolysis device which are linked to the cathode space or to the anode space, in such a way that a plug flow, ideally with a laminar profile, is created in the cathode space and in the anode space.Type: GrantFiled: May 16, 2007Date of Patent: May 21, 2013Assignee: Uhde GmbHInventors: Randolf Kiefer, Karl-Heinz Dulle, Peter Woltering, Stefan Oelmann, Ulf-Steffen Baeumer, Wolfram Stolp
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Patent number: 7918974Abstract: The invention relates to an insulating frame of an electrolysis cell having a microstructured internal section allowing the penetration of the electrolyte even if the structured section is partly or completely overlapped by the membrane, and to an electrolysis cell equipped with the same.Type: GrantFiled: April 27, 2007Date of Patent: April 5, 2011Assignee: Uhdenora S.p.A.Inventors: Ulf Bäumer, Randolf Kiefer, Karl Heinz Dulle, Stefan Oelmann, Peter Woltering, Wolfram Stolp
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Publication number: 20100294653Abstract: The invention relates to an electrolysis device for cleaning acidic waters which comprises a cathode, an anode, and an ion exchange membrane, wherein the membrane is arranged between the cathode and the anode and is attached at least along the entire circumference of its rim, wherein many inlets and outlets are arranged along the upper and lower rim of the electrolysis device which are linked to the cathode space or to the anode space, in such a way that a plug flow, ideally with a laminar profile, is created in the cathode space and in the anode space.Type: ApplicationFiled: May 16, 2007Publication date: November 25, 2010Inventors: Randolf Kiefer, Karl-Heinz Dulle, Peter Woltering, Stefan Oelmann, Ulf-Steffen Baeumer, Wolfram Stolp
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Publication number: 20100219165Abstract: A device for the linear butt welding of thin metal sheets without weld filler materials comprising movable welding heads, a clamping device having at least two pressing elements which operate independently of one another at least one of the pressing elements being suitable for applying two or more distinct pressure levels and additional horizontal pressing elements are further provided in order to press the metal sheets to be welded against one other while being deformed, until full-area contact of the metal-sheet edges butting against one another is achieved as well as a welding method making use of the device.Type: ApplicationFiled: June 23, 2007Publication date: September 2, 2010Inventors: Peter Woltering, Karl-Heinz Dulle, Randolf Kieffer, Stefan Oelmann, Ulf-Steffen Bäumer, Joachim Hoedtke, Günther Kobabe
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Publication number: 20100092692Abstract: The invention relates to a method for coating one or more sides of substrates with catalytically active material, comprising material deposition under vacuum in a vacuum chamber, wherein the following steps are performed: (a) loading the vacuum chamber with at least one substrate, (b) closing and evacuating the vacuum chamber, (c) cleaning the substrate by introducing a gaseous reducing agent into the vacuum chamber, (d) increasing the size of the substrate surface by depositing a vaporous component on the substrate surface, (e) coating by a coating process taken from the group of plasma coating processes, physical gas deposition, sputtering processes or the like, wherein one or more metals and/or alkaline and/or earth alkaline metals or their oxides are applied to the surface of the substrate. This method may be used, for example, for coating electrodes which are used in the chlor-alkali electrolysis.Type: ApplicationFiled: November 15, 2007Publication date: April 15, 2010Applicant: UHDE GMBHInventors: Karl-Heinz Dulle, Ulf-Steffen Baeumer, Randolf Kiefer, Peter Woltering, Dirk Hoormann, Stefan Oelmann, Joachim-H. Hoedtke, Oliver Kayser
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Publication number: 20090236220Abstract: The invention relates to an electrolysis cell of the single-element type design for chlor-alkali electrolysis plants, comprising an anode compartment and a cathode compartment, each of the two compartments containing an electrode connected to the rear wall of the respective compartment by means of parallel bars. The electrodes are thus subdivided into several sections. In accordance with the invention, at least one of two electrodes is provided with a curved shape in each section, this curved section protruding towards the opposite electrode and pressing a membrane area against the opposite electrode. According to a preferred embodiment, the curved shape of the various electrode sections is obtained by means of springs.Type: ApplicationFiled: September 27, 2007Publication date: September 24, 2009Inventors: Peter Woltering, Karl Heinz Dulle, Randolf Kiefer, Stefan Oelmann, Ulf-Steffen Bäumer
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Publication number: 20090159435Abstract: The invention relates to an insulating frame of an electrolysis cell having a microstructured internal section allowing the penetration of the electrolyte even if the structured section is partly or completely overlapped by the membrane, and to an electrolysis cell equipped with the same.Type: ApplicationFiled: April 27, 2007Publication date: June 25, 2009Inventors: Ulf Baumer, Randolf Kiefer, Karl Heinz Dulle, Stefan Oelmann, Peter Woltering, Wolfram Stolp