Ball Or Race Composition Or Material Patents (Class 384/492)
  • Patent number: 10358706
    Abstract: Provided is a carbonitrided bearing part which has high hardenability and toughness, and is excellent in wear resistance and surface-originated flaking life. A carbonitrided bearing part of the present embodiment has a chemical composition containing, in mass %, C: 0.15 to 0.45%, Si: not more than 0.50%, Mn: 0.40 to 1.50%, P: not more than 0.015%, S: not more than 0.005%, Cr: 0.30 to 2.0%, Mo: 0.10 to 0.35%, V: 0.20 to 0.40%, Al: 0.005 to 0.10%, N: not more than 0.030%, and O: not more than 0.0015%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2). At surface, C concentration is 0.7 to 1.2%, N concentration is 0.15 to 0.6%, and Rockwell hardness HRC is 58 to 65. 1.20<0.4Cr+0.4Mo+4.5V<2.60??(1) 2.7C+0.4Si+Mn+0.8Cr+Mo+V>2.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: July 23, 2019
    Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, JTEKT CORPORATION
    Inventors: Yutaka Neishi, Takahisa Suzuki, Tatsuya Koyama, Shingo Yamasaki, Kohei Kanetani, Takashi Sada
  • Patent number: 10302127
    Abstract: The present invention relates to a non-magnetic needle bearing for use in a rotational machine such as, for example, an MRI. The needle bearing may include needles, a cylindrical retainer holding the needles at a predetermined pitch, an outer ring outside of the retainer, and an inner ring inside the retainer. All of the aforementioned may be made of a non-thermoplastic polyimide resin.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: May 28, 2019
    Assignee: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Isao Fukazu, Satoru Sekiguchi
  • Patent number: 10288120
    Abstract: A method is provided that forms a solid film on a bearing component of a rolling bearing. A solution containing a fluorine compound and a lubricant having no functional group is allowed to adhere to the bearing component as a first liquid film (adhesion step). The adhering first liquid film is hardened to form the solid film on the bearing component. The rolling bearing including the bearing component with the solid film formed thereon is rotated. The rolling bearing is washed in a washer fluid containing the same lubricant as that used in the adhesion step, and the washer fluid is allowed to adhere to the bearing component as a second liquid film. Then, the adhering second liquid film is dried.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: May 14, 2019
    Assignee: JTEKT CORPORATION
    Inventor: Kazuyoshi Yamakawa
  • Patent number: 10273429
    Abstract: A lubricant for a rolling-element bearing includes a conventional lubricant as a base lubricant and at least one first additive, wherein the first additive includes muscovite, and the lubricant includes a proportion of muscovite that is between 3% and 5%. Also a method of lubricating a rolling-element bearing using the lubricant and a method of repairing a rolling-element bearing using the lubricant.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: April 30, 2019
    Assignee: Aktiebolaget SKF
    Inventors: Cornelia Haag, Yvonne Koehler, Kerstin Korbacher, Verena Kunkel, Franziska Mantei, Ilim Topaloglu, Marion Warmuth
  • Patent number: 10252767
    Abstract: In one example, a structure for attaching a wheel to one of a frame of a motorcycle or a bicycle may include an axle having first and second opposing end portions and supporting a wheel, a left axle support collar structure configured to support the first opposing end portion of the axle, and a right axle support collar structure configured to support the second opposing end portion of the axle. A first bearing is positioned in the left axle support collar structure, and a second bearing is positioned in the left axle support collar structure. The axle rotates relative to the frame.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: April 9, 2019
    Assignee: Yeti Cycling, LLC
    Inventor: Steven W. Hoogendoorn
  • Patent number: 10214960
    Abstract: An adjustable roller blind mounting bracket comprising a bracket member adapted for mounting to a surface, an adjustment plate slidably received upon the interior face of the bracket member, an adjuster to alter the position of the adjustment plate relative to the bracket member; and a shield secured to the adjustment plate and moveable therewith. The adjustment plate releasably receives and supports a roller tube shaft of a roller tube of the roller blind. The shield has an interior side surface offset from the adjustment plate that prevents contact between the adjuster and blind fabric received about the roller tube.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: February 26, 2019
    Assignee: ZMC Metal Coating Inc.
    Inventor: Philip Ng
  • Patent number: 10202678
    Abstract: Method for heat treating a steel component (28, 36) comprising the steps of: a) carbonitriding the steel component (28, 36) at a temperature of 930-970° C., b) cooling the steel component (28, 36), d) re-heating the steel component (28, 36) to a temperature of 780-820° C. and d) quenching the steel component (28, 36). The method comprises the step of either e) performing a bainite transformation at a temperature just above the martensite formation temperature, transforming 25-99% of the austenite into bainite at the temperature and then increasing the temperature to speed up the transformation of the remaining austenite into bainite, or f) holding the steel component (28, 36) at an initial temperature (T1) above the initial martensite formation temperature (Ms), and lowering the initial temperature (T1) to a temperature (T2) that is below the initial martensite formation temperature (Ms) but above the actual martensite formation temperature during the bainite transformation.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: February 12, 2019
    Assignee: Aktiebolaget SKF
    Inventors: Thore Lund, Tobias Meyer, Staffan Larsson, Peter Neuman
  • Patent number: 10190633
    Abstract: To provide a rolling bearing having excellent rust prevention capability and capable of being used for a long period of time in a highly corrosion environment. A rolling bearing 1 utilized for a power generator which generates power from natural energy or for generator equipment has one or more bearing members which form the bearing having a rust prevention film formed in a predetermined region of a surface of a base material. The rust prevention film is formed by a porous film with a sacrificial anode action against the base material in the whole of the predetermined region. The porous film in a part or the whole of the predetermined region is subjected to sealing treatment which impregnates the porous film with a sealing treatment agent from a surface of the porous film. A surface of a sealing treatment body obtained from the porous film subjected to the sealing treatment is subjected to first coating treatment which coats the surface of the sealing treatment body with epoxy resin coating.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: January 29, 2019
    Assignee: NTN Corporation
    Inventor: Kengo Hiramatsu
  • Patent number: 10184523
    Abstract: A rotating shaft assembly comprising a rotating shaft mounted within a casing and a primary bearing assembly in bearing engagement with the shaft and the casing and positioned between the shaft and the casing. The assembly also includes a secondary bearing assembly comprising a secondary bearing normally radially spaced from the shaft and arranged to engage with or contact the shaft in the event of failure of the primary bearing normally in contact with the shaft, and an inspection member to provide an indication of frictional engagement of the secondary bearing with the shaft.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: January 22, 2019
    Assignee: RATIER-FIGEAC SAS
    Inventor: Frédéric Vermande
  • Patent number: 10156259
    Abstract: A bearing component composed of steel which contains carbon not less than 0.95 mass % and not more than 1.1 mass %, silicon less than 0.3 mass %, manganese less than 0.5 mass %, sulfur less than 0.008 mass %, and chromium not less than 1.4 mass % and less than 1.6 mass % and is composed of remainder iron and an impurity and having a carbonitrided layer formed at a surface portion including a contact surface which is a surface in contact with other components is provided. An average concentration of nitrogen in the surface portion is not lower than 0.3 mass % and not higher than 0.6 mass % and variation in nitrogen concentration in the surface portion is not higher than 0.1 mass %. An amount of retained austenite in the surface portion is not greater than 8 volume %.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: December 18, 2018
    Assignee: NTN CORPORATION
    Inventors: Chikara Ohki, Yukio Matsubara, Daisuke Sato, Noriaki Miwa
  • Patent number: 10107335
    Abstract: A bearing component composed of steel which contains carbon not less than 0.95 mass % and not more than 1.1 mass %, silicon less than 0.3 mass %, manganese less than 0.5 mass %, sulfur less than 0.008 mass %, and chromium not less than 1.4 mass % and less than 1.6 mass % and is composed of remainder iron and an impurity and having a carbonitrided layer formed at a surface portion including a contact surface is provided. An average concentration of nitrogen in the surface portion is not lower than 0.3 mass % and not higher than 0.6 mass % and variation in nitrogen concentration in the surface portion is not higher than 0.1 mass %. An area ratio of a precipitate in a region where no carbonitrided layer is formed is not higher than 7%.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: October 23, 2018
    Assignee: NTN CORPORATION
    Inventors: Daisuke Sato, Chikara Ohki
  • Patent number: 10094422
    Abstract: A bearing component composed of steel which contains carbon not less than 0.95 mass % and not more than 1.1 mass %, silicon less than 0.3 mass %, manganese less than 0.5 mass %, sulfur less than 0.008 mass %, and chromium not less than 1.4 mass % and less than 1.6 mass % and is composed of remainder iron and an impurity and having a carbonitrided layer formed at a surface portion is provided. An average concentration of nitrogen in the surface portion is not lower than 0.3 mass % and not higher than 0.6 mass % and variation in nitrogen concentration is not higher than 0.1 mass %. An amount of retained austenite is not greater than 8 volume %. An area ratio of a precipitate in the inside where no carbonitrided layer is formed is not lower than 11%.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: October 9, 2018
    Assignee: NTN CORPORATION
    Inventors: Chikara Ohki, Yukio Matsubara, Daisuke Sato
  • Patent number: 9951411
    Abstract: The invention relates to an erosion protection coating (11), in particular, for gas turbine components, having a horizontally segmented and/or multi-layered construction. i.e., having at least one relatively hard layer (12) and having at least one relatively soft layer (13), wherein the relatively hard layer or each relatively hard layer as well as the relatively soft layer or each relatively soft layer are disposed on top of one another in an alternating manner, in such a way that an outer-lying layer, which forms an outer surface of the erosion protection coating, is formed as a relatively hard layer (12). According to the invention, the relatively hard layer or each relatively hard layer (12) as well as the relatively soft layer or each relatively soft layer (13) are formed as a ceramic layer in each case.
    Type: Grant
    Filed: April 18, 2009
    Date of Patent: April 24, 2018
    Assignee: MTU AERO ENGINES GmbH
    Inventors: Falko Heutling, Thomas Uihlein, Wolfgang Eichmann
  • Patent number: 9934799
    Abstract: A bearing device includes a shaft and a roller bearing externally inserted over the shaft. The roller bearing includes an inner ring disposed coaxially with a center axis of the shaft, an outer ring surrounding the inner ring from an outer side in a radial direction, and a plurality of rolling elements held between the inner ring and the outer ring to be capable of rolling. The inner ring is divided into one half section and the other half section. The one half section contacts the rolling elements from the one side toward the other side in the axial direction, and the other half section contacts the rolling elements from the other side toward the one side in the axial direction. Preloads are applied to the two half sections in directions in which the one half section and the other half section are brought close to each other.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: April 3, 2018
    Assignee: SEIKO INSTRUMENTS INC.
    Inventors: Akihiro Iino, Masami Oaku, Takayuki Kosaka
  • Patent number: 9856919
    Abstract: Disclosed is a bearing limiting system. The limiting system comprises a limiting bulge formed integrally with a shaft, a bearing inner race, and an acting force conduction part, wherein the acting force conduction part is arranged between the limiting bulge and the bearing inner race, and the inner diameter of the bearing inner race is larger than the outer diameter of the limiting bulge. The bearing limiting system is convenient in installation, can realize the effective limiting of a bearing inner race while not affecting either the strength of the shaft or the assembly and disassembly of the bearing, and is especially suitable for a bearing with a long shaft.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: January 2, 2018
    Inventors: Hongkui Shi, Yongjun Guo, Jianqiu Yang
  • Patent number: 9714697
    Abstract: A stepless transmission includes: a transmission shaft; first to fourth power transmission elements; a plurality of rolling bodies clamped by the first and second power transmission elements disposed in confrontation with each other, and tiltably held by the fourth power transmission element; an axial force generator configured to generate axial force in an axial direction for pressing at least one of the first and second power transmission elements against the rolling bodies; and a transmission device configured to change a gear ratio between an input and output by tilting the rolling bodies. Young's moduli of a contact section and an additional contact section, in contact with the rolling body, of one of the first and second power transmission elements are larger than those of other one of the first and second power transmission elements.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: July 25, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyuki Ogawa, Akira Hibino, Yuki Aratsu
  • Patent number: 9657390
    Abstract: A magnetron sputtering coating device includes a deposition chamber, sputtering cathodes, a rotating stand within the deposition chamber, a support platform on the rotating stand, a first rotation system for driving the rotating stand to rotate around a central axis of the rotating stand, and a baffle fixed on the rotating stand. The sputtering cathodes are arranged around and perpendicular to the rotating stand.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: May 23, 2017
    Assignee: ZHONGAO HUICHENG TECHNOLOGY CO., LTD.
    Inventors: Gong Jin, Jiangping Tu, Lingling Li, Gang Wang, Meina Wang
  • Patent number: 9631747
    Abstract: This invention relates to a partially carbonitriding heat treated stainless steel ferrule, having a first region with a first hardness and a second region with a second hardness, wherein the first region includes a nitrogen layer having a nitrogen concentration higher than a carbon concentration, and a carbon layer formed under the nitrogen layer and having a carbon concentration higher than a nitrogen concentration, so that the first hardness is greater than the second hardness. Thereby, partial heat treatment is effective at preventing rotational torque of the region, except for the portion to be heat treated, from increasing due to the total hardening.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: April 25, 2017
    Assignee: DK-LOK CORPORATION
    Inventors: Eun Sik Noh, Sam Rae Jung
  • Patent number: 9512681
    Abstract: In an embodiment, a polycrystalline diamond compact includes a cemented carbide substrate including a carbide constituent cemented with a cementing constituent. The cementing constituent has a non-homogenous concentration within the substrate that includes a substantially continuous gradient. A first portion (e.g. at or near a center) of the substrate has a concentration of the cementing constituent that differs from a concentration of the cementing constituent at a second portion (e.g., at or near an outer surface) of the substrate. Thus, the concentration gradient exhibits a substantially smooth gradient, with increasing distance from the first portion of the substrate towards the second portion of the substrate. This provides the substrate with relatively higher wear resistance in one region (e.g., at or near the outer surface) and relatively higher toughness in another region (e.g., at or near the center).
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: December 6, 2016
    Assignee: US SYNTHETIC CORPORATION
    Inventor: Debkumar Mukhopadhyay
  • Patent number: 9453533
    Abstract: In an embodiment, a roller bearing assembly may include superhard bearing elements distributed circumferentially about an axis, with gaps located between adjacent ones of the superhard bearing elements. Each of the superhard bearing elements may include a bearing surface and a pair of side surfaces intersecting the bearing surface. Each of the side surfaces may form a respective oblique angle relative to the axis. The roller bearing assembly may include a support ring having the superhard bearing elements affixed thereto. The bearing surfaces of the superhard bearing elements may be positioned and configured to form at least a portion of a superhard raceway for rolling elements to roll over. The oblique angle may be selected to at least partially inhibit the gaps from impeding the rolling elements during operation.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: September 27, 2016
    Assignee: US SYNTHETIC CORPORATION
    Inventor: S. Barrett Peterson
  • Patent number: 9440887
    Abstract: The present invention provides a silicon nitride sintered body comprising a silicon nitride crystalline particle and a grain boundary phase, the silicon nitride sintered body having an area ratio of the grain boundary phase per 100 ?m×100 ?m unit area of 15 to 35% when an arbitrary cross section thereof is photographed. Further, it is preferable that the area ratio of the grain boundary phase per 100 ?m×100 ?m unit area is 15 to 25%. Furthermore, the silicon nitride sintered body is suitable for a wear resistant member. Due to above structure, there can be provided a silicon nitride sintered body and a wear resistant member having a high processability (workability) and an excellent sliding property.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: September 13, 2016
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Kai Funaki, Michiyasu Komatsu, Haruhiko Yamaguti, Katsuyuki Aoki
  • Patent number: 9347491
    Abstract: The present invention provides a hard film which has high wear resistance and excellent peeling resistance and can be prevented from peeling off a base material over a long period of time and a hard film formed body on which the hard film is formed. A hard film (8) has a structure composed of a first mixed layer (8a), consisting mainly of Cr and WC, which is formed directly on a raceway surface (2a) of an inner ring (2) (base material) of a rolling bearing, a second mixed layer (8b), consisting mainly of WC and DLC, which is formed on the first mixed layer (8a), and a surface layer (8c), consisting mainly of DLC, which is formed on the second mixed layer (8b). In the first mixed layer (8a), a content rate of the Cr becomes continuously or stepwise lower and that of the DLC becomes continuously or stepwise higher from a side of the base material toward a side of the second mixed layer (8b).
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: May 24, 2016
    Assignee: NTN CORPORATION
    Inventors: Hideyuki Tsutsui, Kouya Oohira, Masaki Nakanishi
  • Patent number: 9273727
    Abstract: A method for manufacturing a raceway element of a bearing assembly includes hardening a raceway element having a raceway surface by at least partially heating the raceway element, deep rolling the raceway surface using a first rolling element, and then deep rolling the raceway surface using a second rolling element. The first rolling element has at least one different dimension than the second rolling element. In the resulting raceway element, compressive residual stresses of at least 400 MPa are present at a depth from the raceway surface of 200 ?m or less, and between the raceway surface and a depth of 100 ?m from the raceway surface, the amount of the compressive residual stresses changes by 500 MPa or less.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: March 1, 2016
    Assignee: AKTIEBOLAGET SKF
    Inventors: Juergen Gegner, Udo Krug, Armin Olschewski, Arno Stubenrauch
  • Patent number: 9239080
    Abstract: A rolling bearing (6), in particular for the mounting of the shaft of a turbocharger, which rolling bearing includes a bearing ring (1) and a number of rolling bodies (9). The bearing ring (1) is formed from a steel which comprises, as alloy constituents, 0.05 to 0.65 wt % carbon, 0.5 to 5.0 wt % chromium, up to 1.0 wt % molybdenum, up to 1.0 wt % vanadium, and up to 1.0 wt % aluminum. The surface of the bearing ring (1) has a hardened surface layer (2) which comprises nitrites and which comprises a diffusion layer (3) and a connecting layer (4) situated above said diffusion layer. The surface layer (2) has a thickness of up to 1 mm. The invention also relates to a method for producing a corresponding bearing ring (6).
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: January 19, 2016
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Ernst Strian, Peter Gebauer, Heiko Schmidt, Oliver Graf-Goller
  • Patent number: 9163660
    Abstract: Bearing assemblies, apparatuses, and motor assemblies using the same are disclosed. In an embodiment, a bearing assembly may include a plurality of superhard bearing elements distributed circumferentially about an axis. Each of the superhard bearing elements may include a bearing surface. The bearing assembly may also include a support ring structure having a support ring that carries the superhard bearing elements. The support ring structure may include at least one erosion resistant region exhibiting a higher erosion resistance than another region of the support ring.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: October 20, 2015
    Assignee: US SYNTHETIC CORPORATION
    Inventor: Timothy N Sexton
  • Patent number: 9133886
    Abstract: A constant-velocity universal joint includes an outer joint member; an inner joint member arranged in an inside of the outer joint member; and torque transmitting members. At least one of the outer joint member and the inner joint member comprises track grooves that are engaged with rolling surfaces of the torque transmitting members. At least one of the components of the constant-velocity universal joint is formed of a metal sintered compact. The metal sintered compact has a relative density of 80% or more and less than 100%. The metal sintered compact comprises a hardened layer formed on a surface thereof through heat treatment. Among the components each formed of the metal sintered compact, a component having a ring shape is subjected to a cold rolling process.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: September 15, 2015
    Assignee: NTN CORPORATION
    Inventors: Mika Kohara, Tatsuro Sugiyama, Natsuhiko Mori, Hiroyuki Noda, Takahiro Okuno, Hajime Asada
  • Patent number: 9115755
    Abstract: Disclosed is a bearing component having at least one layer having a high hardness and a high current insulation property, the layer comprising a nonconductive oxide layer selected from the group comprising an Al2O3 layer, a TaO layer, an SiO2 layer, a mixed layer comprising two or more of the foregoing oxides, a multilayer structure comprising alternating layers of two or more of the foregoing oxides and a DLC layer such as a ta-C layer, there being at least one ALD layer comprising at least one layer of a material deposited by an ALD (atomic layer deposition) process on the at least one layer having a high hardness and a high current insulation property, the ALD layer itself having a high current insulation property and comprising a material or layer structure selected from the said group of materials.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: August 25, 2015
    Assignee: Picosun OY
    Inventors: Ivan Kolev, Paul Peeters, Roland Tap, Bertram Haag, Yashar Musayev, Serge Kursawe, Tim Matthias Hosenfeldt, Jürgen Gierl, Juhana Kostamo
  • Patent number: 9115426
    Abstract: A coated article of steel having at least one layer having a high hardness and a high resistance to wear applied by a deposition (e.g., PVD, a CVD, or PECVD) process, at least one surface region of said article and at least one ALD layer comprising at least one layer of a material deposited by an ALD (atomic layer deposition) process on said at least one layer, wherein the steel of which the article is made is a martensitic grade of steel, wherein the at least one layer, is a DLC layer, a metal-DLC layer, or a CrAlN layer and has a thickness in the range from 0.5 microns to 4 microns and a hardness in the range from 20 GPa to 100 GPa, and wherein the ALD layer has a thickness in the range from 1 nm to 100 nm.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: August 25, 2015
    Assignee: Picosun OY
    Inventors: Ivan Kolev, Paul Peeters, Roland Tap, Bertram Haag, Yashar Musayev, Serge Kursawe, Tim Matthias Hosenfeldt, Jürgen Gierl, Juhana Kostamo
  • Patent number: 9079295
    Abstract: A substantially homogeneous particle mixture is disclosed. The mixture includes a plurality of derivatized nanodiamond particles comprising a plurality of first functional groups. The mixture also includes a plurality of microdiamond particles, wherein the derivatized nanodiamond particles and microdiamond particles comprise a substantially homogeneous particle mixture. The mixture may also include a plurality of third particles comprising nanoparticles not identical to the derivatized nanodiamond particles, or a plurality of microparticles not identical to the microdiamond particles, or a combination thereof, and the derivatized nanodiamond particles, derivatized microdiamond particles and third particles comprise the substantially homogeneous particle mixture.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: July 14, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Soma Chakraborty, Gaurav Agrawal
  • Publication number: 20150110434
    Abstract: The invention relates to a pinion bearing arrangement of a gearbox for a vehicle or aircraft, providing at least one roller bearing. At least one of the roller bearings is a ball bearing, having an inner ring and an outer ring, wherein both rings have raceways for balls being located between the rings. To ensure a sufficient lifetime of the roller bearings the invention includes that at least one of the rings is made from a ball bearing steel produced by a powder metallurgical process using a powder metallurgy component including 0.5 to 2.0 weight-% C, a maximum of 0.035 weight-% S, 3.0 to 5.0 weight-% Cr, 1.0 to 4.0 weight-% V, 1.0 to 12.0 weight-% W and 2.0 to 12.0 weight-% Mo, wherein at least one raceway has a radius (rI/O) and the balls have a diameter (DB) which fulfill the equation: rI/O/DB>0.53.
    Type: Application
    Filed: March 15, 2012
    Publication date: April 23, 2015
    Applicant: Aktiebolaget SKF
    Inventors: Jeroen Wensing, Ian Peverill, Paul Meaney
  • Patent number: 9011015
    Abstract: A rolling bearing unit with decreased weight and improved durability is provided. An outer-ring core, manufactured using a ferrous alloy, forms an outer ring and is molded to an outer-ring main body that is manufactured using a synthetic resin containing reinforced fibers or using an aluminum alloy. Outer-ring raceway members are fitted into and fastened to mating concave surfaces of the inner circumferential surface of the outer-ring core that are exposed from the outer-ring main body. A hub core, manufactured using a ferrous alloy, forms a hub and is molded to a hub main body made using a synthetic resin containing reinforced fibers or using an aluminum alloy. Around the outer circumferential surface of the hub core, inner-ring raceway members are fitted onto and fastened to a fitting surface of the outer circumferential surface of the hub core that is exposed from the hub main body.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: April 21, 2015
    Assignee: NSK Ltd.
    Inventors: Hiroaki Ishikawa, Tatsuo Wakabayashi
  • Patent number: 9011014
    Abstract: A rolling bearing which can be large-sized, has corrosion resistance, and is allowed to prevent mounting accuracy from deteriorating, a fixing force from decreasing, vibration from occurring at a portion of the rolling bearing to be fixed to a bearing box or the like, and can be used for a long term even in a highly corrosive environment. A rolling bearing (1) has an inner ring (2), an outer ring (3), and rolling elements (4) as bearing members thereof. Of regions of the bearing members which are exposed to a corrosive environment, a film having a sacrificial anode action for a base material of the bearing members is formed in a region including at least a surface (c, d) of the rolling bearing (1) to be fixed. The film formed on the surface (c, d) thereof to be fixed is porous.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: April 21, 2015
    Assignee: NTN Corporation
    Inventors: Katsuhiro Suzuki, Eiichirou Shimazu
  • Patent number: 8998501
    Abstract: The invention concerns a bearing component (Ia, Ib, 1, 7, 9) for a rolling (13, 14, 16) or sliding bearing (19), wherein the bearing component (Ia, Ib, 1, 7, 9) is one of an inner ring (Ia, 1), an outer ring (Ib, 7), a rolling element (9), a cage, or a guide ring. The bearing component (Ia, Ib, 1, 7, 9) comprises a first material (2), and a second material (3) joined to the first material (2), wherein the second material (3) and the first material (2) having been joined by a semi-solid metal process.
    Type: Grant
    Filed: May 26, 2008
    Date of Patent: April 7, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Patrik Dahlman, Martin Friis
  • Patent number: 8967875
    Abstract: A bearing includes a liquid lubricant and at least one ceramic component, which, during operation of the bearing, is subject to rolling contact load. A tribological surface of the at least one ceramic component is impregnated with a sealant, such that the liquid lubricant is prevented from entering discontinuities in the tribological surface.
    Type: Grant
    Filed: November 25, 2010
    Date of Patent: March 3, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Andriy Volodymyrovych Rychahivskyy, Charlotte Vieillard, Xiaobo Zhou
  • Patent number: 8961026
    Abstract: A flanged bearing ring is made up of two different materials joined together as a single piece, namely a radially inner annular insert and a flanged, radially outer lightweight body formed around the insert. The insert forms one or more raceways and is made of a hard material, such as bearing steel. The outer body is made of a lightweight material, such as aluminium alloy, with a higher thermal expansion coefficient higher than that of the hard material which the inner insert is made of. A relief formed by the insert extends into a groove of the outer body. Another relief, formed by the outer body, extends into a further groove of the insert. These reliefs and grooves interlock the insert and the outer body together against relative movement under all temperature conditions.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: February 24, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Paolo A Re, Cornelius Petrus Antonius Vissers
  • Patent number: 8950947
    Abstract: A non-magnetizable rolling bearing component made of an austenitic material and comprising a hardened surface layer wherein the component of the invention is a material used for making the component contains manganese and a method for making such a rolling bearing component wherein the surface-proximate layer of the material of the rolling bearing component contains an admixture of manganese, is carburized at an elevated temperature in an oxygen-rich atmosphere and the rolling bearing component is then cooled.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: February 10, 2015
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventors: Ernst Strian, Stefan Birkner, Ralf Winter, Julia (Amberger) Hermann
  • Patent number: 8944522
    Abstract: A flanged bearing ring (10) for the wheel of a motor vehicle includes two different materials joined as a single piece: a tubular core (15) and an outer body (16) around the core. The outer body forms a radial flange (17) and is made of a lighter material than that of the core. At the axially outer end of the ring, at the side where the flange (17) is provided, the interface surfaces between the external body (16) and the core (15) terminate in a groove (21) formed partly in the outer body and partly in the core. The groove (21) accommodates a sealing ring of polymeric material (22) which is cast and continuously covers a circular separation line (23) at the axially outer end of the interface between the core (15) and the outer body (16).
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: February 3, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Andreas Knopf, Paolo Re
  • Patent number: 8944523
    Abstract: A flanged bearing ring (10) for the wheel of a motor vehicle includes two different materials joined as a single piece: a tubular core (15) and an outer body (16) around the core. The outer body forms a radial flange (17) and is made of a lighter material than that of the core. At the axially outer end of the ring, at the side where the flange (17) is provided, the interface surfaces between the outer body (16) and the core (15) terminate in a groove (21) formed partly in the outer body and partly in the core. The groove (21) accommodates a sealing ring (22) made of rubber-like or elastomeric material which presses against both the outer body (16) and the core (15) so as to seal continuously, along an entire circumference around the axis (x), a separation line (23) between the core (15) and the outer body (16).
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: February 3, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Paolo Re, Cornelius Petrus Antonius Vissers
  • Publication number: 20150027397
    Abstract: The invention relates to a rolling bearing provided with at least one row of rolling elements disposed between an inner raceway and an outer raceway. At least one of the raceways is coated with a tungsten sulphide (WS2) coating. The invention also relates to an internal combustion engine (M) having at least one balance shaft rotated by a crankshaft of the internal combustion engine (M), the at least one balance shaft being freely supported in rotation in a frame (B) of the internal combustion engine (M) by at least one such rolling bearing.
    Type: Application
    Filed: July 28, 2014
    Publication date: January 29, 2015
    Applicant: Aktiebolaget SKF
    Inventors: Richard Corbett, Julien Maffucci
  • Patent number: 8939652
    Abstract: In an embodiment, a roller bearing apparatus may include a rotor having first superhard raceway elements distributed circumferentially about an axis. Each first superhard raceway element includes a raceway surface positioned/configured to form a first portion of a raceway. The apparatus includes a stator including second superhard raceway elements generally opposed to the first superhard raceway elements. Each second superhard raceway element includes a raceway surface positioned/configured to form a second portion of the raceway. The apparatus includes rolling elements interposed between the rotor and stator and positioned and configured to roll on the raceway. One or more of the rolling elements may be configured to elastically deform on the raceway during use. At least a portion of the raceway exhibits a first modulus of elasticity greater than a second modulus of elasticity of at least a portion of the one or more of the rolling elements.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: January 27, 2015
    Assignee: US Synthetic Corporation
    Inventors: S. Barrett Peterson, Craig H Cooley, David P Miess
  • Publication number: 20150023623
    Abstract: A bearing component formed from a steel composition and providing carbon, silicon, manganese, chromium, cobalt, vanadium, and at least one of the following elements sulphur, phosphorous, molybdenum, aluminium, arsenic, tin, antimony, and the balance iron, together with impurities.
    Type: Application
    Filed: October 26, 2012
    Publication date: January 22, 2015
    Inventors: John Beswick, Mohamed Sherif
  • Patent number: 8936321
    Abstract: A flanged bearing ring for a motor vehicle wheel includes two different materials joined as a single piece: a tubular core and an outer body around the core. The outer body forms a radial flange and is made of a lighter material than that of the core. The ring further includes an element of generally tubular shape, which contacts both the outer body and the inner core to cover and seal with continuity a circular line of separation at the end of the interface surface between the core and the outer body at the axially outer side of the ring. The tubular element further forms a cylindrical axial edge which extends in an axially inner direction and is fixed in the axially outer end of the core cavity, and a cylindrical tubular portion, projecting in an axially outer direction beyond the flange, for centering the vehicle wheel.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: January 20, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Paolo Re, Andreas Knopf
  • Patent number: 8927446
    Abstract: The present invention provides a ceramic material comprising: a first phase comprising zirconia, yttrium and cerium, wherein the yttrium and cerium are present in a molar ratio of 0.15 to 0.5 and in a combined amount of 5 to 15 mol %, a second phase comprising alumina, and a third phase comprising metal aluminate platelets.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: January 6, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Lars Kahlman, Charlotte Vieillard, Jelena Sekulic, Knut Henrik Johansen, Hans Hillen Schjelderup
  • Publication number: 20140360210
    Abstract: A refrigeration chiller employs a centrifugal compressor the impellers of which are mounted on a shaft which is itself mounted for rotation using rolling element bearings lubricated only by the refrigerant which constitutes the working fluid of the chiller system. Apparatus is taught for providing liquid refrigerant to (1.) the bearings immediately upon chiller start-up, during chiller operation and during a coastdown period subsequent to shutdown of the chiller and (2.) the drive motor of the chiller's compressor for motor cooling purposes. By use of a variable speed-driven motor to drive the compressor, optimized part load chiller performance is achieved in a chiller which does not require or employ an oil-based lubrication system.
    Type: Application
    Filed: December 5, 2012
    Publication date: December 11, 2014
    Inventors: William E. Lapp, Todd W. Smith, Arthur L. Butterworth, Paul J. Sikorsky
  • Publication number: 20140363115
    Abstract: On the contact surface of the rolling bearing part made of alloy steel containing appropriate amounts of Cr and Mo, the C+N content is 0.9 to 1.4 mass % and the area ratio of carbide is 10% or less. At the depth of 1% of the diameter of the rolling element from the contact surface, the hardness is 720 to 832 in Hv, the amount of retained austenite is 20 to 45 volume %, and the compressive residual stress is 50 to 300 Mpa. At the depth of 1 to 3% of the diameter of the rolling element from the contact surface, the average value of the prior austenite grain size is 20 ?m or less and the maximum value of the prior austenite grain size is 3 times or less the average value, and the hardness of the core portion is 400 to 550 in Hv.
    Type: Application
    Filed: November 29, 2012
    Publication date: December 11, 2014
    Applicant: NSK LTD.
    Inventors: Hiroki Yamada, Hideyuki Uyama, Masako Tsutsumi, Yusuke Morito
  • Publication number: 20140348454
    Abstract: An outer ring, an inner ring, and a ball, each of which is a bearing part, are made of a quench-hardened steel containing not less than 0.90 mass % and not more than 1.05 mass % of carbon, not less than 0.15 mass % and not more than 0.35 mass % of silicon, not less than 0.01 mass % and not more than 0.50 mass % of manganese, and not less than 1.30 mass % and not more than 1.65 mass % of chromium with the rest consisting of an impurity. A contact surface thereof with another part has a nitrogen concentration of not less than 0.25 mass %. A remaining austenite amount in the contact surface is not less than 6 volume % and not more than 12 volume %.
    Type: Application
    Filed: December 7, 2012
    Publication date: November 27, 2014
    Applicant: NTN CORPORATION
    Inventors: Takashi Ueno, Chikara Ohki, Daisuke Sato, Kyouhei Kageyama, Shougo Shimizu
  • Patent number: 8858087
    Abstract: A bearing assembly that includes a substantially circular bearing race with a raceway on one of its radially inner or outer surfaces and a plurality of spherical bearing elements disposed around the raceway, and wherein the bearing race is configured to, in use, bias the bearing elements towards a bearing region of a shaft.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: October 14, 2014
    Assignee: Rolls-Royce PLC
    Inventor: John Leslie Gibbons
  • Publication number: 20140254964
    Abstract: The invention relates to a bearing system having a bearing pair made up of at least one bearing and at least one running partner, wherein a coating which comprises a layer of which the main constituent is amorphous SiO2 is applied to at least one running surface of the bearing pair.
    Type: Application
    Filed: March 3, 2014
    Publication date: September 11, 2014
    Inventors: Gerhard THUMM, Till MERKEL, Volker VOGGESER, Christian LEHNERT
  • Patent number: 8821024
    Abstract: The present invention provides a member for a rolling bearing (1) which is capable of decreasing the amount of carbon dioxide generated from a polymeric member in discarding the rolling bearing, contributing to restraint or prevention of an increase in the concentration of the carbon dioxide in the atmosphere or a decrease of the concentration thereof in the atmosphere, and allows a continuous use temperature to be high and an endurance time to be long and a rolling bearing using the member. The member for the rolling bearing (1) is composed of a molding of a polymeric elastic body or a synthetic resin composition. The member is at least one member selected from among an inner ring (2), an outer ring (3), rolling elements (4), a retainer (5), and a sealing member (6). A raw material derived from a biomass is at least partially used for a producing raw material of a polymeric matrix composing the polymeric elastic body or the synthetic resin composition.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: September 2, 2014
    Assignee: NTN Corporation
    Inventors: Eiichirou Shimazu, Masaki Egami, Yoshihide Himeno, Kazutoyo Murakami
  • Patent number: 8807840
    Abstract: A turbocharger uses a high speed rolling element bearing system. An exemplary rolling element bearing system includes a polymer sleeve to impede the flow of heat from the bearing housing into the outer race of the rolling element bearing system. In a second embodiment of the invention, the sleeve is supported by an oil film. In a third embodiment of the invention, the bearing cartridge is damped by a damping medium which also connects the bearing cartridge to the bearing housing.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: August 19, 2014
    Assignee: BorgWarner Inc.
    Inventors: Timothy House, Paul Diemer, Allan Kelly, Augustine Cavagnaro