Patents by Inventor Christian Wohlrab
Christian Wohlrab 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: 9702036Abstract: A PVD layer system for the coating of workpieces encompasses at least one mixed-crystal layer of a multi-oxide having the following composition: (Me11-xMe2x)2O3, where Me1 and Me2 each represent at least one of the elements Al, Cr, Fe, Li, Mg, Mn, Nb, Ti, Sb or V. The elements of Me1 and Me2 differ from one another. The crystal lattice of the mixed-crystal layer in the PVD layer system has a corundum structure which in an x-ray diffractometrically analyzed spectrum of the mixed-crystal layer is characterized by at least three of the lines associated with the corundum structure. Also disclosed is a vacuum coating method for producing a mixed-crystal layer of a multi-oxide, as well as correspondingly coated tools and components.Type: GrantFiled: April 6, 2011Date of Patent: July 11, 2017Assignee: OERLIKON SURFACE SOLUTIONS AG, PFÄFFIKONInventors: Jurgen Ramm, Beno Widrig, Michael Ante, Christian Wohlrab
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Patent number: 9605338Abstract: The invention relates to a method for operating an arc source, whereby an electric spark discharge is ignited and run on the surface of a target and the spark discharge is simultaneously fed a direct current with an associated constant voltage DV as well as a pulsed current generated by a periodically applied voltage signal. The voltage at the arc source is boosted over several microseconds and the shape of the voltage signal is in essence arbitrarily selectable.Type: GrantFiled: November 8, 2007Date of Patent: March 28, 2017Assignee: OERLIKON SURFACE SOLUTIONS AG, PFAFFIKONInventors: Jürgen Ramm, Christian Wohlrab
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Patent number: 8197648Abstract: A method for producing a low-conductivity layer on at least one workpiece by vacuum coating is provided. The method includes operating an electrical arc discharge between an anode and a cathode of an arc source in an atmosphere containing a reactive gas. A small external magnetic field is generated to be essentially perpendicular to a target surface of a target, which is electrically connected to the cathode, to assist an evaporation process. A degree of recoating of the target surface by other coating sources in a vacuum coating installation is less than 10%, and the magnetic field is generated by a magnet system with an axially-polarized coil having a geometry similar in size to that of the target. Excitation current for the electrical arc discharge is supplied through the axially-polarized coil.Type: GrantFiled: July 12, 2007Date of Patent: June 12, 2012Assignee: Oerlikon Trading AG, TruebbachInventors: Juergen Ramm, Beno Widrig, Christian Wohlrab
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Patent number: 8152971Abstract: A method for manufacturing a cutting tool includes the steps of providing a body of cermet or cemented carbide, having a cutting edge with an edge radius Re smaller than 40 ?m, a flank a rake face, applying by PVD a single or a multilayer coating to at least a part of the surface of the body, comprising at least a part of the cutting edge and applying by PVD said single or multilayer coating, comprising PVD coating with at least one oxidic layer.Type: GrantFiled: September 29, 2011Date of Patent: April 10, 2012Assignee: Oerlikon Trading AG, TruebbachInventors: Dennis T. Quinto, Christian Wohlrab, Jurgen Ramm
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Patent number: 8129040Abstract: The invention provides a single or a multilayer PVD coated sharp edged cutting tool, which can at the same time exhibit satisfactory wear and thermochemical resistance as well as resistance to edge chipping. The cutting tool comprises a sintered body made of a cemented carbide, a CBN, a cermet or a ceramic material having a cutting edge with an edge radius Re, a flank and a rake face and a multilayer coating consisting of a PVD coating comprising at least one oxidic PVD layer covering at least parts of the surface of the sintered body. In one embodiment the edge radius Re is smaller than 40 ?m, preferably smaller than or equal to 30 ?m. The covered parts of the surface preferably comprise at least some parts of the sharp edge of the sintered body.Type: GrantFiled: May 16, 2007Date of Patent: March 6, 2012Assignee: Oerlikon Trading AG, TruebbachInventors: Dennis Quinto, Christian Wohlrab, Jürgen Ramm
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Publication number: 20120021137Abstract: A method for manufacturing a cutting tool includes the steps of providing a body of cermet or cemented carbide, having a cutting edge with an edge radius Re smaller than 40 ?m, a flank a rake face, applying by PVD a single or a multilayer coating to at least a part of the surface of the body, comprising at least a part of the cutting edge and applying by PVD said single or multilayer coating, comprising PVD coating with at least one oxidic layer.Type: ApplicationFiled: September 29, 2011Publication date: January 26, 2012Applicant: OERLIKON TRADING AG, TRUEBBACHInventors: Dennis T. QUINTO, Christian WOHLRAB, Jürgen RAMM
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Publication number: 20110183084Abstract: A PVD layer system for the coating of workpieces encompasses at least one mixed-crystal layer of a multi-oxide having the following composition: (Me11-xMe2x)2O3, where Me1 and Me2 each represent at least one of the elements Al, Cr, Fe, Li, Mg, Mn, Nb, Ti, Sb or V. The elements of Me1 and Me2 differ from one another. The crystal lattice of the mixed-crystal layer in the PVD layer system has a corundum structure which in an x-ray diffractometrically analyzed spectrum of the mixed-crystal layer is characterized by at least three of the lines associated with the corundum structure. Also disclosed is a vacuum coating method for producing a mixed-crystal layer of a multi-oxide, as well as correspondingly coated tools and components.Type: ApplicationFiled: April 6, 2011Publication date: July 28, 2011Applicant: OERLIKON TRADING AG, TRUBBACHInventors: Jurgen Ramm, Beno Widrig, Michael Ante, Christian Wohlrab
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Patent number: 7939181Abstract: A PVD layer system for the coating of workpieces encompasses at least one mixed-crystal layer of a multi-oxide having the following composition: (Me11-xMe2x)2O3, where Me1 and Me2 each represent at least one of the elements Al, Cr, Fe, Li, Mg, Mn, Nb, Ti, Sb or V. The elements of Me1 and Me2 differ from one another. The crystal lattice of the mixed-crystal layer in the PVD layer system has a corundum structure which in an x-ray diffractometrically analyzed spectrum of the mixed-crystal layer is characterized by at least three of the lines associated with the corundum structure. Also disclosed is a vacuum coating method for producing a mixed-crystal layer of a multi-oxide, as well as correspondingly coated tools and components.Type: GrantFiled: October 11, 2006Date of Patent: May 10, 2011Assignee: Oerlikon Trading AG, TrubbachInventors: Jürgen Ramm, Beno Widrig, Michael Ante, Christian Wohlrab
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Patent number: 7857948Abstract: Method for producing poorly conductive and in particular nonconductive layers on at least one work piece by means of a vacuum-coating process in which an electric arc discharge is activated between at least one anode and the cathode of an arc source in a reactive-gas atmosphere, whereby on the surface of a target that is electrically connected to the cathode either none or only a small outer magnetic field is generated that extends essentially perpendicular to the target surface for assisting the evaporation process, the degree of recoating of the target surface by other coating sources is less than 10%, and the magnetic field is generated with a magnet system that encompasses at least one axially polarized coil with a geometry similar to the circumference of the target.Type: GrantFiled: July 19, 2006Date of Patent: December 28, 2010Assignee: Oerlikon Trading AG, TrubbachInventors: Jürgen Ramm, Beno Widrig, Christian Wohlrab
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Publication number: 20100018464Abstract: A process and an arrangement by means of which it is possible to generate a layer system for the protection against wear, for the protection against corrosion and for improving the sliding properties or the like, which has an adhesive layer for the arrangement on a substrate, a transition layer for the arrangement on the adhesive layer and a cover layer of an adamantine carbon, the adhesive layer including at least one element from the Group which contains the elements of the 4th, 5th and 6th Subgroup and silicon, the transition layer comprising carbon and at least one element from the above-mentioned Group, and the cover layer consisting essentially adamantine carbon, the layer system having a hardness of at least 15 GPa, preferably at least 20 GPa, and an adhesion of at least 3 HF.Type: ApplicationFiled: August 19, 2009Publication date: January 28, 2010Applicant: Oerlikon Trading AG, TruebbachInventors: Orlaw MASSLER, Mauro Pedrazzini, Christian Wohlrab, Hubert Eberle, Martin Grischke, Thorsten Michler
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Patent number: 7601405Abstract: A process and an arrangement by means of which it is possible to generate a layer system for the protection against wear, for the protection against corrosion and for improving the sliding properties or the like, which has an adhesive layer for the arrangement on a substrate, a transition layer for the arrangement on the adhesive layer and a cover layer of an adamantine carbon, the adhesive layer including at least one element from the Group which contains the elements of the 4th, 5th and 6th Subgroup and silicon, the transition layer comprising carbon and at least one element from the above-mentioned Group, and the cover layer consisting essentially adamantine carbon, the layer system having a hardness of at least 15 GPa, preferably at least 20 GPa, and an adhesion of at least 3 HF.Type: GrantFiled: January 11, 2008Date of Patent: October 13, 2009Assignee: Oerlikon Trading AG, TruebbachInventors: Orlaw Massler, Mauro Pedrazzini, Christian Wohlrab, Hubert Eberle, Martin Grischke, Thorsten Michler
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Publication number: 20090166188Abstract: Method for producing low-conductivity layers, especially insulating layers, on at least one workpiece by vacuum coating, wherein an electrical arc discharge is operated between at least one anode and one cathode of an arc source in an atmosphere containing reactive gas, and only a small external magnetic field essentially perpendicular to the target surface or none at all is generated at the surface of a target electrically connected to the cathode to assist the evaporation process, the degree of recoating of the surface by other coating sources being less than 10%, and the magnetic field being generated by a magnet system that comprises at least one axially polarized coil with a geometry similar in size to the target.Type: ApplicationFiled: July 12, 2007Publication date: July 2, 2009Applicant: Oelikon Trading AG TruebbachInventors: Juergen Ramm, Beno Widrig, Christian Wohlrab
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Publication number: 20080311310Abstract: A process and an arrangement by means of which it is possible to generate a layer system for the protection against wear, for the protection against corrosion and for improving the sliding properties or the like, which has an adhesive layer for the arrangement on a substrate, a transition layer for the arrangement on the adhesive layer and a cover layer of an adamantine carbon, the adhesive layer including at least one element from the Group which contains the elements of the 4th, 5th and 6th Subgroup and silicon, the transition layer comprising carbon and at least one element from the above-mentioned Group, and the cover layer consisting essentially adamantine carbon, the layer system having a hardness of at least 15 GPa, preferably at least 20 GPa, and an adhesion of at least 3 HF.Type: ApplicationFiled: January 11, 2008Publication date: December 18, 2008Applicant: Oerlikon Trading AG, TruebbachInventors: Orlaw Massler, Mauro Pedrazzini, Christian Wohlrab, Hubert Eberle, Martin Grischke, Thorsten Michler
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Publication number: 20080286608Abstract: The invention provides a single or a multilayer PVD coated sharp edged cutting tool, which can at the same time exhibit satisfactory wear and thermochemical resistance as well as resistance to edge chipping. The cutting tool comprises a sintered body made of a cemented carbide, a CBN, a cermet or a ceramic material having a cutting edge with an edge radius Re, a flank and a rake face and a multilayer coating consisting of a PVD coating comprising at least one oxidic PVD layer covering at least parts of the surface of the sintered body. In one embodiment the edge radius Re is smaller than 40 ?m, preferably smaller than or equal to 30 ?m. The covered parts of the surface preferably comprise at least some parts of the sharp edge of the sintered body.Type: ApplicationFiled: May 16, 2007Publication date: November 20, 2008Inventors: Dennis QUINTO, Christian Wohlrab, Jurgen Ramm
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Publication number: 20080286496Abstract: The invention relates to a method for operating an arc source, whereby an electric spark discharge is ignited and run on the surface of a target and the spark discharge is simultaneously fed a direct current with an associated constant voltage DV as well as a pulsed current generated by a periodically applied voltage signal. The voltage at the arc source is boosted over several microseconds and the shape of the voltage signal is in essence arbitrarily selectable.Type: ApplicationFiled: November 8, 2007Publication date: November 20, 2008Applicant: OC OERLIKON BALZERS AGInventors: Jurgen Ramm, Christian Wohlrab
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Publication number: 20080090099Abstract: A PVD layer system for the coating of workpieces encompasses at least one mixed-crystal layer of a multi-oxide having the following composition: (Me11-xMe2x)2O3, where Me1 and Me2 each represent at least one of the elements Al, Cr, Fe, Li, Mg, Mn, Nb, Ti, Sb or V. The elements of Me1 and Me2 differ from one another. The crystal lattice of the mixed-crystal layer in the PVD layer system has a corundum structure which in an x-ray diffractometrically analyzed spectrum of the mixed-crystal layer is characterized by at least three of the lines associated with the corundum structure. Also disclosed is a vacuum coating method for producing a mixed-crystal layer of a multi-oxide, as well as correspondingly coated tools and components.Type: ApplicationFiled: October 11, 2006Publication date: April 17, 2008Applicant: OC OERLIKON BALZERS AGInventors: Jurgen Ramm, Beno Widrig, Michael Ante, Christian Wohlrab
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Publication number: 20080020138Abstract: Method for producing poorly conductive and in particular nonconductive layers on at least one work piece by means of a vacuum-coating process in which an electric arc discharge is activated between at least one anode and the cathode of an arc source in a reactive-gas atmosphere, whereby on the surface of a target that is electrically connected to the cathode either none or only a small outer magnetic field is generated that extends essentially perpendicular to the target surface for assisting the evaporation process, the degree of recoating of the target surface by other coating sources is less than 10%, and the magnetic field is generated with a magnet system that encompasses at least one axially polarized coil with a geometry similar to the circumference of the target.Type: ApplicationFiled: July 19, 2006Publication date: January 24, 2008Applicant: OC OERLIKON BALZERS AG.Inventors: Jurgen Ramm, Beno Widrig, Christian Wohlrab
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Patent number: 7318847Abstract: Workpiece with at least one functional face and a layer system deposited on at least a portion of the functional face as well as a structure pattern, which encompasses at least a portion of the layer system and which is comprised of at least one three dimensional micro structure (5) with structure depth S, characterized in that the deposited layer system is deposited with PVD, CVD or combined PCD/CVD processes, and the three dimensional micro structure (5) extends from the surface of the layer system (4) up into the workpiece, such that the latter is uncoated in a lower region of the micro structure (5).Type: GrantFiled: April 22, 2003Date of Patent: January 15, 2008Assignee: Oerlikon Trading AG, TrubbachInventors: Orlaw Massler, Christian Wohlrab
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Patent number: 7160616Abstract: The invention describes a device and a process that render possible the production of a layer system for wear protection, corrosion protection and improvement of the slipping properties and the like with an adhesion layer to be arranged on a substrate, a transition layer to be arranged on the adhesion layer and a covering layer of diamond-like carbon, wherein the adhesion layer comprises at least one element of the group of elements that contains the elements of the fourth, fifth and sixth subgroup of the periodic table and silicon, the transition layer comprises carbon and at least one element of the aforesaid groups and covering layer consists essentially of diamond-like carbon, the layer system having a hardness of at least 15 GPa, preferably at least 20 GPa, and an adhesion of at least 3 HF according to VDI 382l, Sheet 4.Type: GrantFiled: December 27, 2000Date of Patent: January 9, 2007Assignee: OC Oerlikon Balzers Ltd.Inventors: Orlaw Massler, Mauro Pedrazzini, Christian Wohlrab, Hubert Eberle, Martin Grischke, Thorsten Michler
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Publication number: 20060175190Abstract: The invention relates to a vacuum arc source and to a method for operating the same, said source comprising a target with a surface for operating an arc discharge. The target is arranged in the range of influence of a device for generating a magnetic field, said device comprising at least two magnetic systems of opposite polarity and being embodied in such a way that the component B? which is perpendicular to the surface and pertains to the resulting magnetic field has essentially constantly low values over a large part of the surface or has a value equal to zero.Type: ApplicationFiled: October 30, 2003Publication date: August 10, 2006Applicant: Unaxis Balzers Ltd.Inventors: Andreas Schuetze, Christian Wohlrab