Patents by Inventor Wolfram Kruhöffer
Wolfram Kruhöffer 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: 11624403Abstract: The invention relates to a method for producing a rolling bearing ring featuring an improved robustness against the formation of white etching cracks (WEC), wherein the rolling bearing component, which is made of a hypo-eutectoid heat-treated steel containing C in an amount of 0.4-0.55% and Cr in an amount of 0.5-2.0% in order to form a hardened boundary layer, is inductively heated, then quenched and subsequently tempered.Type: GrantFiled: November 7, 2017Date of Patent: April 11, 2023Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KGInventors: Lothar Hofmann, Andreas Mangold, Toni Blass, Wolfram Kruhoeffer, Werner Trojahn
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Patent number: 11378127Abstract: An axial rolling bearing consisting of at least one annular bearing disc which has a circumferential raceway arched in profile cross section, and consisting of a multiplicity of rolling elements formed as bearing needles or bearing rollers and arranged next to one another in a circular form, which roll on the raceway of the bearing disc and are kept at uniform distances from one another by a bearing cage. The arched raceway is formed having at least one circumferential groove-shaped depression at least in the region of one of the two ends of the rolling elements.Type: GrantFiled: June 6, 2019Date of Patent: July 5, 2022Assignee: Schaeffler Technologies AG & Co. KGInventors: Wolfgang Fugel, Wolfram Kruhöffer
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Publication number: 20210254666Abstract: An axial rolling bearing consisting of at least one annular bearing disc which has a circumferential raceway arched in profile cross section, and consisting of a multiplicity of rolling elements formed as bearing needles or bearing rollers and arranged next to one another in a circular form, which roll on the raceway of the bearing disc and are kept at uniform distances from one another by a bearing cage. The arched raceway is formed having at least one circumferential groove-shaped depression at least in the region of one of the two ends of the rolling elements.Type: ApplicationFiled: June 6, 2019Publication date: August 19, 2021Applicant: Schaeffler Technologies AG & Co. KGInventors: Wolfgang Fugel, Wolfram Kruhöffer
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Publication number: 20200300303Abstract: The invention relates to a method for producing a rolling bearing ring featuring an improved robustness against the formation of white etching cracks (WEC), wherein the rolling bearing component, which is made of a hypo-eutectoid heat-treated steel containing C in an amount of 0.4-0.55% and Cr in an amount of 0.5-2.0% in order to form a hardened boundary layer, is inductively heated, then quenched and subsequently tempered.Type: ApplicationFiled: November 7, 2017Publication date: September 24, 2020Applicant: SCHAEFFLER TECHNOLOGIES AG & CO. KGInventors: Lothar HOFMANN, Andreas MANGOLD, Toni BLASS, Wolfram KRUHOEFFER, Werner TROJAHN
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Patent number: 10670076Abstract: Rolling bearings and methods of making the same are disclosed. The rolling bearing may include an inner ring, an outer ring and rolling elements arranged radially or axially between the inner ring and the outer ring. A coating may be formed at least partially on the inner ring, and/or on the outer ring, and/or on the rolling elements, wherein the coating is formed predominantly from tungsten and is configured to prevent white etching cracks. The rolling bearing may be used in a wind turbine.Type: GrantFiled: May 4, 2017Date of Patent: June 2, 2020Assignee: Schaeffler Technologies AG & Co. KGInventors: Wolfram Kruhöffer, Toni Blaß, Bertram Haag
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Publication number: 20190128327Abstract: Rolling bearings and methods of making the same are disclosed. The rolling bearing may include an inner ring, an outer ring and rolling elements arranged radially or axially between the inner ring and the outer ring. A coating may be formed at least partially on the inner ring, and/or on the outer ring, and/or on the rolling elements, wherein the coating is formed predominantly from tungsten and is configured to prevent white etching cracks. The rolling bearing may be used in a wind turbine.Type: ApplicationFiled: May 4, 2017Publication date: May 2, 2019Applicant: Schaeffler Technologies AG & Co. KGInventors: Wolfram Kruhöffer, Toni Blaß, Bertram Haag
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Patent number: 9145916Abstract: An axial roller bearing, in particular an axial needle bearing, having a first annular bearing disk and a second annular bearing disk that are each made of a thin-walled sheet steel and are arranged at a distance from one another on a common center axis, and a plurality of rolling elements, arranged next to one another, that roll between the axial inner sides—implemented as races—of the two bearing disks and that are held at uniform distances from one another by a bearing cage. The bearing disks are implemented as disk springs that deflect as a function of load and have races positioned at an angle, and are arranged relative to one another such that the rolling elements have low-friction point contact in the unloaded state of the axial roller bearing and only have load-bearing line contact with the races in the fully loaded state.Type: GrantFiled: June 7, 2011Date of Patent: September 29, 2015Assignee: SCHAEFFLER TECHNOLOGIES GMBH & CO. KGInventors: Wolfgang Fugel, Wolfram Kruhöffer
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Publication number: 20130136387Abstract: The invention concerns an axial roller bearing (1), in particular an axial needle bearing, consisting essentially of a first annular bearing disk (2) and a second annular bearing disk (3) that are each made of a thin-walled sheet steel and are arranged at a distance from one another on a common center axis (AM), and of a plurality of rolling elements (4) arranged next to one another that roll between the axial inner sides—implemented as races (5, 6)—of the two bearing disks (2, 3) and that are held at uniform distances from one another by a bearing cage (7).Type: ApplicationFiled: June 7, 2011Publication date: May 30, 2013Applicant: SCHAEFFLER TECHNOLOGIES AG & CO. KGInventors: Wolfgang Fugel, Wolfram Kruhöffer
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Publication number: 20130004110Abstract: A bearing ring includes a ring element having at least two grooves which extend from one axial side to the other axial side of the ring element and form predetermined breaking lines for cracking the ring element. The ring element is in the form of a sleeve produced by deep-drawing, wherein the grooves are also machined in during the deep-drawing of the sleeve.Type: ApplicationFiled: February 3, 2011Publication date: January 3, 2013Applicant: SCHAEFFLER TECHNOLOGIES AG & CO. KGInventors: Wolfram Kruhoeffer, Tobias Mederer, Oliver Graf-Goller
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Publication number: 20060239599Abstract: The invention relates to a sealing arrangement (1) for a rolling-contact bearing (2), comprising a rotating sealing disk (3), which engages with a sealing lip (14) in a recess (16) of the inner bearing ring (5). The sealing lip (14) is also provided with a bead (24), the arrangement and fitted position of which bring about a prestressing of the sealing lip (14) on the wall (18) of the recess (16).Type: ApplicationFiled: July 20, 2004Publication date: October 26, 2006Inventors: Rainer Schenk, Bernard Nicola, Thomas Fickert, Wolfram Kruhoeffer, Harald Peschke
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Patent number: 7066471Abstract: A lip-type shaft seal is made of elastic material with a Shore A hardness of ?75, includes a radial sealing lip, which has a sealing edge to bear against a rotating component and terminates in a axial sealing lip, which has a sealing edge to rests in installed state against a contact surface. The axial sealing lip extends at an angle of ?35° in relation to a symmetry axis of the shaft seal, when the axial sealing lip has not been installed yet and is under no tension, and extends from the sealing edge of the radial sealing lip at a length of ?1.4 mm. When the shaft seal is installed, the axial sealing lip rests against the contact surface at an axial overlap of 0.05 to 0.55 mm.Type: GrantFiled: October 2, 2003Date of Patent: June 27, 2006Assignee: INA-Schaeffler KGInventors: Elmar Mause, Harald Peschke, Wolfram Kruhöffer, Thomas Traudt, Horst Krischer