Patents by Inventor Heinrich Groos
Heinrich Groos 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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Publication number: 20050029232Abstract: The invention concerns a high-strength erosion electrode having good electrical conductivity. The erosion electrode is made up of a steel core, an intermediate layer of copper or a copper-containing alloy, and an outer layer containing at least 40% zinc or, alternatively, a steel core and a zinc alloy outer layer having a zinc content of from 40-60%. The steel core has a patented structure which contains between 0.6 and 1 wt. % carbon and occupies an area corresponding to between 50 and 75% of the erosion electrode diameter, the intermediate layer occupying an area of between 5 and 40% of the total diameter, the outer layer occupying an area of between 10 and 30%, and the zinc content of the outer layer being between 40 and 60 wt. %. In the alternative embodiment, the steel core occupies an area corresponding to between 50 and 75% of the erosion electrode diameter and the outer layer occupies the balance.Type: ApplicationFiled: September 8, 2004Publication date: February 10, 2005Inventors: Bernd Barthel, Heinrich Groos, Hans Hermanni, Klaus Tauber
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Patent number: 6806433Abstract: The invention concerns a high-strength erosion electrode having good electrical conductivity. The erosion electrode is made up of a steel core, an intermediate layer of copper or a copper-containing alloy, and an outer layer containing at least 40% zinc or, alternatively, a steel core and a zinc alloy outer layer having a zinc content of from 40-60%. The steel core has a patented structure which contains between 0.6 and 1 wt. % carbon and occupies an area corresponding to between 50 and 75% of the erosion electrode diameter, the intermediate layer occupying an area of between 5 and 40% of the total diameter, the outer layer occupying an area of between 10 and 30%, and the zinc content of the outer layer being between 40 and 60 wt. %. In the alternative embodiment, the steel core occupies an area corresponding to between 50 and 75% of the erosion electrode diameter and the outer layer occupies the balance.Type: GrantFiled: July 31, 2001Date of Patent: October 19, 2004Assignee: Berkenhoff GmbHInventors: Bernd Barthel, Heinrich Groos, Hans Hermanni, Klaus Tauber
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Patent number: 6794597Abstract: In order to achieve a reduction in wear of the wire guide rollers, apart from an improvement in the cutting speed and an improvement in current conduction, a wire electrode for spark erosion cutting of metals etc., comprising either a homogenous center (1) made of a metal or of a metal alloy, or a composite center, is provided with a sheath coating (2) whose surface is structured, wherein the indentations (3) created by the structure, are filled by a filler (4) made of an easily vapourable metal or of a metal alloy, so as to achieve a surface with little peak-to-valley height, i.e. with little surface roughness.Type: GrantFiled: September 17, 2002Date of Patent: September 21, 2004Assignee: Berkenhoff GmbHInventors: Heinrich Groos, Bernd Barthel, Tobias Noethe, Christoph Dietrich
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Patent number: 6781081Abstract: A wire electrode for spark erosion cutting of metals, electrically-conducting ceramics etc., comprising either a homogenous centre (1) made of a metal or of a metal alloy, or a composite centre made from a steel core with a coating of copper or copper alloy, wherein the wire electrode comprises at least two sheath coatings made of zinc alloys, with said coatings wearing during erosion. In order to increase performance during high-speed cutting, such a wire electrode comprises an inner sheath coating (2) predominantly comprising &bgr;-brass, and an outer sheath coating (3) predominantly comprising &ggr;-brass, wherein the fraction of &bgr;/&bgr;′-phase or &ggr;-phase in the two sheath coatings is at least 60%. The ratio of the coating thickness of &bgr;-brass to &ggr;-brass is between 0.3 and 7. The sum of the thicknesses of both sheath coatings in relation to the external diameter of the electrode is between 0.1 and 0.3.Type: GrantFiled: September 13, 2002Date of Patent: August 24, 2004Assignee: Berkenhoff GmbHInventors: Heinrich Groos, Bernd Barthel, Tobias Noethe, Christoph Dietrich
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Publication number: 20030057190Abstract: In order to achieve a reduction in wear of the wire guide rollers, apart from an improvement in the cutting speed and an improvement in current conduction, a wire electrode for spark erosion cutting of metals etc., comprising either a homogenous centre (1) made of a metal or of a metal alloy, or a composite centre, is provided with a sheath coating (2) whose surface is structured, wherein the indentations (3) created by the structure, are filled by a filler (4) made of an easily vapourable metal or of a metal alloy, so as to achieve a surface with little peak-to-valley height, i.e. with little surface roughness.Type: ApplicationFiled: September 17, 2002Publication date: March 27, 2003Inventors: Heinrich Groos, Bernd Barthel, Tobias Noethe, Christoph Dietrich
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Publication number: 20030057189Abstract: A wire electrode for spark erosion cutting of metals, electrically-conducting ceramics etc., comprising either a homogenous centre (1) made of a metal or of a metal alloy, or a composite centre made from a steel core with a coating of copper or copper alloy, wherein the wire electrode comprises at least two sheath coatings made of zinc alloys, with said coatings wearing during erosion. In order to increase performance during high-speed cutting, such a wire electrode comprises an inner sheath coating (2) predominantly comprising &bgr;-brass, and an outer sheath coating (3) predominantly comprising &ggr;-brass, wherein the fraction of &bgr;/&bgr;′-phase or &ggr;-phase in the two sheath coatings is at least 60%. The ratio of the coating thickness of &bgr;-brass to &ggr;-brass is between 0.3 and 7. The sum of the thicknesses of both sheath coatings in relation to the external diameter of the electrode is between 0.1 and 0.3.Type: ApplicationFiled: September 13, 2002Publication date: March 27, 2003Inventors: Heinrich Groos, Bernd Barthel, Tobias Noethe, Christoph Dietrich
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Patent number: 6448527Abstract: The invention concerns a high-strength erosion electrode having good electrical conductivity. The erosion electrode is made up of a steel core, an intermediate layer of copper or a copper-containing alloy, and an outer layer containing at least 40 % zinc. The steel core has a patented structure which contains between 0.6 and 1 wt. % carbon and occupies an area corresponding to between 50 and 75 % of the erosion electrode diameter, the intermediate layer occupying an area of between 5 and 40 % of the total diameter, the outer layer occupying an area of between 10 and 30 %, and the zinc content of the outer layer being between 40 and 60 wt. %.Type: GrantFiled: December 9, 1998Date of Patent: September 10, 2002Assignee: Berkenhoff GmbHInventors: Bernd Barthel, Heinrich Groos, Hans Hermanni, Klaus Tauber
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Patent number: 6447930Abstract: In order to produce a wire electrode having a core consisting of a copper/zinc alloy and to produce a specific sheath layer, the sheath layer is coated onto the core at a temperature at which no diffusion occurs. The wire electrode is subsequently heated at a heating speed higher than 10° C. per second, briefly annealed at temperatures above 500° C. and subsequently cooled again very rapidly at cooling speeds higher than 10° C. per second.Type: GrantFiled: February 11, 1998Date of Patent: September 10, 2002Assignee: Berkenhoff GmbHInventors: Bernd Barthel, Heinrich Groos, Hans Hermanni
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Publication number: 20010045412Abstract: The invention concerns a high-strength erosion electrode having good electrical conductivity. The erosion electrode is made up of a steel core, an intermediate layer of copper or a copper-containing alloy, and an outer layer containing at least 40% zinc or, alternatively, a steel core and a zinc alloy outer layer having a zinc content of from 40-60%. The steel core has a patented structure which contains between 0.6 and 1 wt. % carbon and occupies an area corresponding to between 50 and 75% of the erosion electrode diameter, the intermediate layer occupying an area of between 5 and 40% of the total diameter, the outer layer occupying an area of between 10 and 30%, and the zinc content of the outer layer being between 40 and 60 wt. %. In the alternative embodiment, the steel core occupies an area corresponding to between 50 and 75% of the erosion electrode diameter and the outer layer occupies the balance.Type: ApplicationFiled: July 31, 2001Publication date: November 29, 2001Inventors: Bernd Barthel, Heinrich Groos, Hans Hermanni, Klaus Tauber
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Patent number: 5762726Abstract: In order to produce a wire electrode having a core consisting of a copper/zinc alloy and to produce a specific sheath layer, the sheath layer is coated onto the core at a temperature at which no diffusion occurs. The wire electrode is subsequently heated at a heating speed higher than 10.degree. C. per second, briefly annealed at temperatures above 500.degree. C. and subsequently cooled again very rapidly at cooling speeds higher than 10.degree. C. per second.Type: GrantFiled: March 22, 1996Date of Patent: June 9, 1998Assignee: Berkenhoff GmbHInventors: Bernd Barthel, Heinrich Groos, Hans Hermanni
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Patent number: 5248104Abstract: A wire-unwinding device in which wire can be unwound from a very large wire drum such that the direction of curvature of the wire is maintained and alternating bendings of the wire are avoided. The wire is guided over a stationary first guide pulley, a second guide pulley, which is changeable in position in order to apply an initial tensioning force, and over a further stationary third guide pulley.Type: GrantFiled: June 14, 1991Date of Patent: September 28, 1993Assignee: Berkenhoff GmbHInventors: Heinrich Groos, Hans Hermanni, Jurgen Gerlach
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Patent number: 5231270Abstract: A wire electrode for cutting of workpieces by means of spark erosion, which consists of an eroding wire with or without a jacket, with at least the jacket containing one or several metallic alloy parts having a low volatilization temperature, such as zinc, cadmium, lead, antimony, bismuth, graphite or the like, the wire electrode is, in order to yet further increase with little increased expense the removal performance and the finished surface quality, coated with a surface layer of an electrically highly conductive material, as for example silver, gold, rhodium, palladium or iridium or a very thin layer thickness of its alloys.Type: GrantFiled: September 26, 1991Date of Patent: July 27, 1993Assignee: Berkenhoff GmbHInventors: Heinrich Groos, Hans Hermanni
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Patent number: 5199162Abstract: A wire-electrode arrangement for effecting a spark-erosive cutting and a method for the manufacture of a wire electrode. In order to be able to cut non-conductive materials, a plus potential and also a minus potential can be applied to the electrode, since the wire electrode is formed by a first and a second electrode, which are insulated from one another and which extend substantially parallel to one another.Type: GrantFiled: July 31, 1991Date of Patent: April 6, 1993Assignee: Berkenhoff GmbHInventor: Heinrich Groos
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Patent number: 5140125Abstract: A wire-electrode arrangement for effecting a spark-erosive cutting and a method for the manufacture of a wire electrode. In order to be able to cut non-conductive materials, a plus potential and also a minus potential can be applied to the electrode, since the wire electrode is formed by a first and a second electrode, which are insulated from one another and which extend substantially parallel to one another.Type: GrantFiled: December 18, 1990Date of Patent: August 18, 1992Assignee: Berkenhoff GmbHInventor: Heinrich Groos
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Patent number: 4935594Abstract: A method for manufacturing an eroding electrode which has an outer layer consisting of a structural composition having a resistance against erosive wear characteristic many times greater than the common eroding electrode. The outer layer initially consists of one or several coatings of a metal alloy having a low volatilization temperature encasing a core of metal or a metal alloy. The encased wire electrode is then annealed at such temperatures until an alloy, which extends from the outer surface of the encasement toward the core, is created and which has a decreasing content of the consitutents of the low volatilzation temperature material or alloy, after which the wire electrode is cooled in a controlled manner to fix the diffusion states.Type: GrantFiled: October 21, 1988Date of Patent: June 19, 1990Assignee: Berkenhoff GmbHInventors: Heinrich Groos, Hans Hermanni
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Patent number: 4766280Abstract: To increase the cutting performance of a wire electrode for electroerosive cutting, the surface of the wire electrode is provided with projections and recesses created by twisting the wire electrode of polygonal cross section about its axis.Type: GrantFiled: February 12, 1987Date of Patent: August 23, 1988Assignee: Berkenhoff GmbHInventor: Heinrich Groos
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Patent number: 4631237Abstract: A wire electrode for a spark-eroding system for erosion cutting of workpieces using intermittent electrical charges includes a core of a current-conducting material and a wire coating of a material with a lower evaporation temperature, for example zinc. The core consists of one of the following alloys according to DIN (German Industrial Standard) 17666:(a) Cu Mg 0.4;(b) Cu Fe 2P;(c) Cu Cr Zr;(d) Cu Zr.Type: GrantFiled: April 17, 1985Date of Patent: December 23, 1986Assignee: Berkenhoff GmbHInventors: Erich Dommer, Heinrich Groos
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Patent number: RE44789Abstract: In order to produce a wire electrode having a core consisting of a copper/zinc alloy and to produce a specific sheath layer, the sheath layer is coated onto the core at a temperature at which no diffusion occurs. The wire electrode is subsequently heated at a heating speed higher than 10° C. per second, briefly annealed at temperatures above 500° C. and subsequently cooled again very rapidly at cooling speeds higher than 10° C. per second.Type: GrantFiled: July 13, 2012Date of Patent: March 4, 2014Assignee: Berkenhoff GmbHInventors: Bernd Barthel, Heinrich Groos, Hans Hermanni