Bearing-surface Treatment Patents (Class 384/625)
  • Patent number: 11719279
    Abstract: A pivot bearing (1), includes a metallic first bearing element (2) made of steel, which is at least partially coated by means of a coating (5), a metallic second bearing element (3) made of steel, which is coated with a PTFE-containing sliding lining (6), wherein the coating (5) and the sliding lining (6) are in sliding contact, and wherein the coating (5) comprises at least one first layer (9) deposited on the first bearing element (2) by means of a PVD, CVD, or PECVD method, wherein the coating (5) also comprises at least one further layer which is arranged on the at least one first layer (9) and faces away from the first bearing element (2).
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: August 8, 2023
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Serge Kursawe, Thomas Weitkamp, Frank Bolte, Thomas König, Nikolay Podgaynyy
  • Patent number: 11486394
    Abstract: The invention relates to a method of manufacture of a scroll compressor (1), in particular for pretreatment for the coating of areas in contact with one another during operation of the scroll compressor (1). The scroll compressor (1) is developed with a non-movable spiral (3) with a base plate (3a) and a spiral-form wall (3b) extending from one side of the base plate (3a), as well as with a movable spiral (4) with a base plate (4a) and a spiral-form wall (4b) extending from a front side of the base plate (4a). The spirals (3, 4) are developed out of a basis material.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: November 1, 2022
    Assignee: Hanon Systems
    Inventors: Erik-Florian Falkus, Kadir Dursun, Frau Susana Salvador, Nuno Guerin
  • Patent number: 11199226
    Abstract: A rolling bearing includes a first raceway surface; a second raceway surface; and a plurality of rolling elements rotatably arranged between the first raceway surface and the second raceway surface. Multiple recesses are provided on at least one surface among the first raceway surface, the second raceway surface, and rolling surfaces of the plurality of the rolling elements. An area ratio of openings of the recesses to the at least one surface is in a range of 5% to 37%. An equivalent circle diameter of the opening of each of the recesses is in a range of 1 ?m to 27 ?m. A depth of each of the recesses in a direction normal to the at least one surface is in a range of 3 ?m to 10 ?m. A surface waviness of the at least one surface excluding the recesses is smaller than or equal to 0.2 ?m.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: December 14, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Junji Murata, Shigeo Kamamoto, Yuki Shishihara
  • Patent number: 10767753
    Abstract: A gear system for a turbofan engine assembly includes a sun gear rotatable about an engine centerline, a non-rotatable ring gear, and a rotating carrier that drives a fan. A plurality of planet gears is intermeshed between the sun gear and the ring gear. A rolling element bearing assembly supports rotation of the planet gear on the carrier. The rolling element bearing assembly includes a rolling element between an inner race and an outer race separated by a cage. A first passage for lubricant through the planet gear. A second passage is in communication with the first passage for communicating lubricant through the inner race to an interface between the inner race and the cage. A geared turbofan engine is also disclosed.
    Type: Grant
    Filed: April 19, 2016
    Date of Patent: September 8, 2020
    Assignee: Raytheon Technologies Corporation
    Inventor: William G. Sheridan
  • Patent number: 10266722
    Abstract: The present disclosure relates to bearing and seal assemblies comprising a composite structure which includes a substrate and a layer disposed on the substrate. The layer disposed on the substrate includes a polyimide matrix and a filler dispersed within the polyimide matrix. The filler can be a thermoplastic polymer, such as PTFE, and/or an organic filler. The bearing assembly can exhibit a synergistic improvement in wear resistance and coefficient of friction.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 23, 2019
    Assignee: SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATION
    Inventors: Nafih Mekhilef, Boguslawa Czarnecka, Jeffrey H. Peet, Emeric Malefant, Blair K. Brettmann, Hongxiang Teng
  • Patent number: 10138763
    Abstract: A rocker arm includes a roller, a support shaft coaxially mounted in the roller, walls arranged along a rotation axis and having the roller therebetween and having through holes, respectively, through which end portions of the support shaft are inserted, and each of the walls having an inner surface opposite the roller, and holding members mounted in the respective walls. The holding member includes a tubular portion mounted in each through hole and disposed between an inner peripheral surface of the through hole and an outer surface of an end portion of the support shaft, a first stopper portion included at a first end of the tubular portion to be in contact with the inner surface of one of the walls, and a second stopper portion included at a second end of the tubular portion to be in contact with an end surface of one of the end portions.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: November 27, 2018
    Assignee: OTICS CORPORATION
    Inventor: Daiki Miyazawa
  • Patent number: 9852886
    Abstract: A slide part has a surface structure in which there are at least two periodic structures among a first periodic structure with a period of 10 nm to 100 nm inclusive and a depth of 5 nm to 50 nm inclusive, a second periodic structure with a period of 100 nm to 1000 nm inclusive and a depth of 20 nm to 500 nm inclusive, and a third periodic structure with a period of 1000 nm to 10000 nm inclusive and a depth of 100 nm to 3000 nm inclusive, in which one of the at least two periodic structures is formed on the other periodic structure.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: December 26, 2017
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY LIMITED
    Inventors: Akinobu Sato, Akiko Suzuki, Takeshi Kawano
  • Patent number: 9097278
    Abstract: The invention relates to a bearing ring produced from a straight profile bar that is bent to an annular shape and where the bearing ring is joined in a flash butt welding process, and where the bearing ring further comprises an additional component enclosed within the bearing ring material. The invention further relates to a method for producing such a bearing ring from a straight profile bar. The advantage of the invention is to obtain a bearing ring with completely enclosed additional component in a simple and cost-effective way.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: August 4, 2015
    Assignee: AKTIEBOLAGET SKF
    Inventor: Patrik Dahlman
  • Patent number: 9074621
    Abstract: The surfaces (2a) of at least rolling elements (2) of a roller bearing for transmissions or differentials of automobiles are provided with innumerable minute, recess-shaped cavities at random and the surface roughness parameter Ryni of the surfaces provided with the cavities is in the range of 0.4-1.0 ?m and the Sk value is not more than ?1.6.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: July 7, 2015
    Assignee: NTN CORPORATION
    Inventors: Takashi Tsujimoto, Rino Fukami
  • Patent number: 9039286
    Abstract: A bearing device for a wheel prevents backlash in a circumferential direction and has excellent workability for connecting a hub wheel and an outer joint member of a constant velocity universal joint. The bearing device includes a recess-projection fitting structure in which the hub wheel and a shaft section, which is fitted in a hole of the hub wheel of the outer joint member of the constant velocity universal joint, are unitized together. In the recess-projection fitting structure, entire fitting regions among projections on the outer surface of the shaft section of the outer joint member and recesses, which fit on the projections, are brought into intimate contact with each other.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: May 26, 2015
    Assignee: NTN Corporation
    Inventors: Akira Torii, Hiroshi Kawamura, Kiyoshige Yamauchi, Masahiro Ozawa, Tohru Nakagawa, Yuichi Asano, Mitsuru Umekida, Hisaaki Kura, Shin Tomogami
  • Patent number: 9016429
    Abstract: A bearing system includes a sleeve bearing supported on a shaft and a gear supported on the sleeve bearing. The shaft has an outer diameter shaft surface, the sleeve bearing has an inner diameter bearing surface and an outer diameter bearing surface, and the gear has a gear bore surface. At least one of the outer diameter shaft surface, the inner diameter bearing surface, the outer diameter bearing surface, and the gear bore surface includes an isotropic surface finish and a hard thin film over the isotropic surface finish. During a break-in period of operation of the bearing system, the hard thin film over the isotropic surface finish breaks in a counter surface of the bearing system to extend a hydrodynamic lubrication period of operation of the bearing system.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: April 28, 2015
    Assignee: Caterpillar Inc.
    Inventors: Bao Feng, M. Brad Beardsley
  • Publication number: 20150093066
    Abstract: A laminate includes a metal substrate and a sliding layer overlying the metal substrate. The sliding layer can include a polymer fabric. The polymer fabric can include first polymer P1. The sliding layer can further included a melt-processable matrix polymer. The melt-processable matrix polymer can include a second polymer P2. In embodiments, either P1 or P2 is a fluoropolymer. The sliding layer can further include a filler. In embodiments, the total amount of fluoropolymer and filler in the sliding layer is at least 30 vol %.
    Type: Application
    Filed: September 30, 2014
    Publication date: April 2, 2015
    Inventors: Jens Speicher, Andreas Waldöfner, Alexander Oehrlein, Julia Ziegler
  • Publication number: 20150093065
    Abstract: An anti-fretting rust preventative solution includes a rust preventative fluid and an anti-fretting additive dissolved in the rust preventative fluid. The anti-fretting additive includes at least one compound that is surface-active with steel to produce a low-shear velocity accommodation layer in a metal-to-metal interference fit. The anti-fretting rust preventative solution can be provided in a bearing assembly with metal-to-metal interference fits, as well as other applications where fretting wear may otherwise occur.
    Type: Application
    Filed: January 24, 2013
    Publication date: April 2, 2015
    Inventors: Gary Doll, Peter Drechsler, Carl Hager, Ryan Evans, Paul Shiller
  • 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
  • Publication number: 20150055909
    Abstract: A method of refurbishing a bearing is disclosed. The method includes providing a bearing having a tube structure and inner and outer surfaces. The bearing is mounted onto a mounting unit and a cladding head of a laser cladding unit is positioned within a bore of the bearing. The cladding head forms laser cladding layers disposed on the inner surface of the bearing. The cladding layers increase a thickness of the bearing and reduce an internal diameter of the bearing.
    Type: Application
    Filed: August 21, 2014
    Publication date: February 26, 2015
    Inventor: David Weng Seng LOKE
  • Patent number: 8955225
    Abstract: In forming an actuator, a large end surface of a tapered roller of a tapered roller bearing is shot with minute particles of silicon carbide having a diameter of 0.5 to 100 ?m and having an angle formed by crushing, and such a surface is scraped concavely at a diameter within a range from 0.5 to 100 ?m to form a large number of concavities having a depth of equal to or greater than 1 ?m at a pitch of equal to or less than 200 ?m. The concavities are non-continuous and isolated from each other, and serve as a lubricant puddle. The concavities are formed by scraping and not by plastic deformation, and thus the surface is not hardened.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: February 17, 2015
    Assignee: NSK Ltd.
    Inventors: Masato Kobayashi, Tomoharu Saito, Shinji Fujita, Takanori Tanaka
  • Publication number: 20150036962
    Abstract: Disclosed is a lubricating oil composition for low-friction sliding materials, which is used in a sliding mechanism where a DLC film containing hydrogen in an amount of from 5 atom % to 50 atom % is formed on at least one sliding surface. The lubricating oil composition contains, in the lubricant base oil therein and based on the total amount of the composition, (A) an organic zinc dithiophosphate in an amount of from 0.005% by mass to 0.12% by mass in terms of the phosphorus concentration therein, (B) an amide-based friction-reducing agent in an amount of from 0.05% by mass to 5.0% by mass, and (C) an alkaline earth metal salicylate-based detergent and/or an alkaline earth metal sulfonate-based detergent in an amount of from 0.05% by mass to 0.5% by mass in terms of the alkaline earth metal concentration therein.
    Type: Application
    Filed: March 18, 2013
    Publication date: February 5, 2015
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoko Ogahara, Moritsugu Kasai, Hiroaki Koshima, Masanori Tsujioka, Koji Miyake
  • Patent number: 8944690
    Abstract: A method of forming a corrosion resistant bushing includes bonding a sliding layer to a first surface of a load bearing substrate to form a laminate sheet and cutting a blank from the laminate sheet. The laminate sheet includes an exposed surface corresponding to a second surface of the load bearing substrate. The blank includes cut edges having a load bearing substrate portion. The method further includes forming a semi-finished bushing from the blank, and applying a corrosion resistant coating to the exposed surface and the load bearing substrate portion of the cut edges to form the corrosion resistant bushing.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: February 3, 2015
    Assignee: Saint-Gobain Performance Plastics Pampus GmbH
    Inventor: Parag Natu
  • Patent number: 8939644
    Abstract: A swash plate 3 includes a substrate 11 made of an iron-based material, a hard first resin layer 12 provided to coat an end surface of the substrate 11, and a soft second resin layer 13 provided to coat the first resin layer 12. A spiral annular groove 12A is formed in a surface of the first resin layer 12, and the second resin layer 13 is provided to match the sectional shape of the first resin layer 12. With the soft second resin layer 13 on a sliding surface 3A of the swash plate 3, a swash plate 3 having a good fit in an initial stage of sliding can be provided. When the second resin layer 13 partially wears, a protrusion 12 of the first resin layer 12 of the hard resin is exposed to provide good wear resistance and good sliding properties.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: January 27, 2015
    Assignee: Taiho Kogyo Co., Ltd.
    Inventors: Masanori Akizuki, Shingo Gotou, Hiroshi Kanemitsu
  • Patent number: 8939844
    Abstract: Cross-type universal joint and a shell-type needle bearing that is used therein. The portions on the outer surface of the shell-type outer ring for which there is a possibility of coming in sliding contact with the tip end edges of at least two seal lips of a plurality of seal lips of a seal ring are selectively covered with a corrosion resistant coating. Preferably, the entire outer surface of the shell-type outer ring is covered by a chemically treated film having anti-corrosion properties.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: January 27, 2015
    Assignee: NSK Ltd.
    Inventors: Masato Higuchi, Eisho Watanabe
  • Publication number: 20150016766
    Abstract: There is provided a sliding member formed by combining a resin overlay and a soft metal overlay. The sliding member has a soft layer comprising a metallic material with a hardness of less than 40 HV provided under a resin overlay layer comprising a solid lubricant and resin. In the event of contamination by a foreign matter, the soft layer under the resin overlay layer is capable of plastic deformation and the resin overlay layer is capable of partial deformation accompanying the plastic deformation due to the hardness (T1) (?m) of the soft layer and the hardness (T2) (?m) of the resin overlay layer being such that 0.2?T1/T2?7.0 and 3.0?T1?20.0. Consequently, a foreign matter is desirably embedded and resistance to a foreign matter can be improved. Low friction is maintained by the resin overlay layer even after contamination by a foreign matter.
    Type: Application
    Filed: February 7, 2013
    Publication date: January 15, 2015
    Applicant: DAIDO METAL COMPANY LTD.
    Inventors: Hiroyuki Asakura, Mikihito Yasui, Shigeya Haneda
  • Patent number: 8905642
    Abstract: A rolling bearing which has excellent performance at high-temperatures and has high-speed durability and quietness, is capable of effectively preventing hydrogen brittleness-caused peeling from occurring on a rolling surface thereof, and has a low environmental load. The rolling bearing (1) is constructed of an inner ring (2) having a rolling surface on its peripheral surface, an outer ring (3) having a rolling surface on its inner peripheral surface, a plurality of rolling elements (4) disposed between both rolling surfaces, and a cage (5) retaining the rolling elements (4). The inner ring (2), the outer ring (3), the rolling elements (4) or the cage (5) are metal-made bearing members. Film-coating treatment is conducted on a sliding surface or a rolling surface of at least one of these metallic bearing members with plant-derived polyvalent alcohol compounds such as curcumin, quercetin, chlorogenic acid or the like.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: December 9, 2014
    Assignee: NTN Corporation
    Inventors: Hidenobu Mikami, Yosuke Taguchi
  • Publication number: 20140355743
    Abstract: A bearing assembly is disclosed that includes a sleeve having an opening formed therein and a shaft positioned within the opening of the sleeve such that a gap is formed between an inner surface of the sleeve and an outer surface of the shaft. A lubricant is disposed in the gap and a plurality of grooves are formed on at least one of the outer surface of the shaft and the inner surface of the sleeve. An anti-wetting coating is disposed on the at least one of the outer surface of the shaft and the inner surface of the sleeve between adjacent grooves of the plurality of grooves.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 4, 2014
    Inventors: Ian Strider Hunt, Ben David Poquette, Andrew Thomas Triscari
  • Patent number: 8876396
    Abstract: A roller bearing includes an outer ring having a substantially cylindrical internal bearing surface and an outside surface defining a plurality of protuberances. A protective coating is applied to the outside surface of the outer ring. An inner ring is coaxially disposed at least partially in the outer ring and has a substantially cylindrical external bearing surface. The external bearing surface and the internal bearing surface define an annular cavity in which a plurality of rolling elements is disposed. The rolling elements are in rolling engagement with the external bearing surface and the internal bearing surface. The outside surface of the outer ring can be case hardened, for example the outer ring can be carburized. The outside surface of the outer ring can be knurled. A method of manufacturing such a bearing is also disclosed.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: November 4, 2014
    Assignee: Roller Bearing Company of America, Inc.
    Inventor: Werner B. Guilford
  • Patent number: 8858086
    Abstract: A bearing includes an inner ring, an outer ring, and a plurality of rolling elements. In the bearing, each of an inner ring raceway surface and an outer ring raceway surface has a contact area that comes into contact with the rolling elements, and a non-contact area that is formed adjacent to an outer side of an end portion of the contact area and does not come into contact with the rolling elements. A lubricant retaining portion having a recessed portion and a large number of non-uniform projections and depressions is formed at the non-contact area of at least one of the inner ring raceway surface and the outer ring raceway surface.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: October 14, 2014
    Assignee: Jtekt Corporation
    Inventor: Junji Murata
  • Patent number: 8850655
    Abstract: A bushing includes a bronze backing layer having a first axial end, a second axial end, and a central opening, the bushing having a cylindrical shape and a porous bronze layer. PTFE or other suitable low friction material is impregnated into the porous bronze layer at one of a radially inner or outer surface of the bushing. A PTFE or other suitable low friction material topical layer is disposed adjacent the impregnated layer. The bushing may optionally comprise a flange which also includes the bronze backing layer, the porous bronze and impregnated layer, and the topical layer on an axially inner or outer surface.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: October 7, 2014
    Assignee: General Electric Company
    Inventor: Robert William Bruce
  • Patent number: 8845199
    Abstract: The invention relates to a method for the production of an anti-friction bearing element (1) comprising a carrier metal which forms a back bearing side and a bearing metal, wherein the carrier metal is made from a bronze-based alloy. The bearing metal is also made from a bronze-based alloy, wherein the hardness of said bronze-based alloy is reduced at least in some areas by heat treatment, so that in the radial direction of the anti-friction bearing a hardness gradient is formed with increasing hardness in the direction of the back side (7) of the anti-friction bearing element (1).
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: September 30, 2014
    Assignee: Miba Gleitlager GmbH
    Inventors: Lukas Haedicke, Falko Langbein
  • Patent number: 8829399
    Abstract: A method and device for heating or hardening at least an axial segment of a rotationally-symmetric surface of a work piece includes rotating the work piece about its rotational axis and moving a peripheral portion of an inductor along a longitudinal profile of the axial segment of the rotating work piece with a constant spacing between the peripheral portion and the axial segment. At least a portion of the movement of the peripheral portion is composed of a first vector component in the direction of the rotational axis and a second component extending perpendicularly to the first vector component. The peripheral portion has a length in the rotational axis direction that is less the length of the axial segment in the rotational axis direction.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: September 9, 2014
    Assignee: Aktiebolaget SKF
    Inventors: Marco Burtchen, Michael Jung
  • Patent number: 8814437
    Abstract: A method for producing a roller bearing cage (1) is provided, including the following steps: a base body (2) which is close to a net shape is produced by a stereolithography method or by a 3D-printing method, and the provided base body (2) is coated with a thin, nanocrystalline coating (3). A roller bearing cage, including a base body (2) and a nanocrystalline coating (3) fixed to the base body (2) produced by this method is also provided. This method is suitable for producing roller bearing cages in only small quantities in a small series.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: August 26, 2014
    Assignee: Schaeffler Tecnologies GmbH & Co. KG
    Inventor: Wolfgang Braun
  • Patent number: 8793878
    Abstract: A method for manufacturing a rolling-element bearing includes forming an inner ring from a steel having a sulfur content of 0.002 to 0.015 mass % and an oxygen content of less than 15 ppm, subjecting the inner ring to a hardening heat treatment that ends by performing a final heat treatment step at a predetermined temperature, cold working the inner-ring raceway to generate compressive residual stresses at least in a surface layer of the inner-ring raceway, subjecting the inner ring to a bluing treatment and subjecting the blued inner ring to a thermal post-treatment process at a temperature below the predetermined temperature of the final hardening heat treatment step. The resulting rolling-element bearing may exhibit compressive residual stresses having an absolute value of at least 200 MPa at 0.1 mm beneath the outer surface of the inner-ring raceway and a maximum value of 1500 MPa or less throughout the inner ring.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: August 5, 2014
    Assignee: Aktiebolaget SKF
    Inventors: Juergen Gegner, Wolfgang Nierlich, Armin Olschewski, Kenred Stadler, Arno Stubenrauch, Markus Volkmuth
  • Patent number: 8783961
    Abstract: A bearing for alternators and a bearing for pulleys is capable of reducing hydrogen embrittlement or cracking despite that the bearing is used in an environment under such a severe condition that hydrogen is generated from grease or the like and the bearing experiences a load of a condition facilitating hydrogen embrittlement or cracking. The bearing includes a rolling element, an inner ring and an outer ring, and at least one of the rolling element and the inner and outer rings has a nitrogen enriched layer and contains austenite crystal grains having a grain size number exceeding 10.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: July 22, 2014
    Assignee: NTN Corporation
    Inventors: Chikara Ohki, Tomoaki Goto
  • Patent number: 8770842
    Abstract: A hemispherical shoe (sliding member) 1 has a flat sliding surface 3, which is quenched to form a quenched portion 7. A part of the quenched sliding surface is partially annealed to form an annealed portion 6. When an oil film pressure acts on the sliding surface 1, the annealed portion 6 is deformed by pressure so that the surface thereof has a concave portion 6A. In the annealed portion 6, a remaining quenched portion 8 may remain at the center part thereof. The concave portion 6A can be used as an oil reservoir or an oil flow path, so that an excellent seizure resistance can be ensured.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: July 8, 2014
    Assignee: Taiho Kogyo Co., Ltd.
    Inventors: Satoshi Nomura, Masaharu Hatta, Hiroshi Kanemitsu
  • Patent number: 8757887
    Abstract: A bearing device for a wheel prevents backlash in a circumferential direction and has excellent workability for connecting a hub wheel and an outer joint member of a constant velocity universal joint. The bearing device includes a recess-projection fitting structure in which the hub wheel and a shaft section, which is fitted in a hole of the hub wheel of the outer joint member of the constant velocity universal joint, are unitized together. In the recess-projection fitting structure, entire fitting regions among projections on the outer surface of the shaft section of the outer joint member and recesses, which fit on the projections, are brought into intimate contact with each other.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: June 24, 2014
    Assignee: NTN Corporation
    Inventors: Akira Torii, Hiroshi Kawamura, Kiyoshige Yamauchi, Masahiro Ozawa, Tohru Nakagawa, Yuichi Asano, Mitsuru Umekida, Hisaaki Kura, Shin Tomogami
  • Patent number: 8714831
    Abstract: An outer ring, an inner ring and a roller serving as a bearing component that adopts as a source material a steel ensuring a large fracture toughness value and also having an alloy element added thereto in a reduced amount and also provides sufficient wear resistance, are configured of a steel containing 0.15-0.3% by mass of carbon, 0.15-0.7% by mass of silicon, and 0.15-1.0% by mass of manganese, with a remainder of iron and an impurity, and have a raceway/rolling contact surface included in a region having a carbon enriched layer and a nitrogen enriched layer. In the nitrogen enriched layer the raceway/rolling contact surface has a nitrogen concentration equal to or larger than 0.3% by mass.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: May 6, 2014
    Assignee: NTN Corporation
    Inventor: Nobuyuki Mori
  • Patent number: 8714829
    Abstract: A wheel support bearing assembly includes an outer member and an inner member, each having a raceway surface. The inner member is made up of a combination of a rotatable ring, having its outer periphery formed with a vehicle body fitting flange, and a separate member. Each of the outer member and the flanged rotatable ring has a surface region representing a thermally refined structure formed by means of martensite hardening and high temperature tempering and also has a core region representing an as-forged structure made up of ferrite and pearlite.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: May 6, 2014
    Assignee: NTN Corporation
    Inventor: Isao Hirai
  • Patent number: 8690450
    Abstract: A surface shape of a machining surface of a rotating elastic grindstone is rendered to be a shape appropriate to a to-be-machined surface of a work. With the work being rotated, the rotating elastic grindstone is held in engagement to an end of the to-be-machined surface of the work. The elastic grindstone is moved along a machining trajectory effective to allow the machining surface of the elastic grindstone, which is so formed as to suit to the to-be-machined surface, to follow the to-be-machined surface of the work. The to-be-machined surface of the work so superfinished represents a smooth surface free from any machining trace such as a crossing-angle pattern.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: April 8, 2014
    Assignee: NTN Corporation
    Inventors: Gousuke Itou, Satoshi Fujimoto
  • Patent number: 8661679
    Abstract: A method of manufacturing a bearing device for a wheel, the method including forming an inner shaft so that an outside diameter of the inner shaft at a first portion is smaller than an outside diameter of the inner shaft at a second portion which is adjacent to the first portion, the peripheral surface of the inner shaft at the first portion is to be heat-treated, and the peripheral surface of the inner shaft at the second portion is not to be heat-treated, and the first portion has a predetermined length in an axial direction, and heat-treating the peripheral surface of the inner shaft at the first portion, and finishing a peripheral surface of the inner shaft by lathe turning whereby a step is not formed at a border between the first portion and the second portion.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: March 4, 2014
    Assignee: JTEKT Coporation
    Inventor: Tsuyoshi Kamikawa
  • Patent number: 8640341
    Abstract: A method of producing a rolling sliding member, wherein, after a work for a rolling sliding member, which is made of a bearing steel and formed in a predetermined shape, is quenched, a heating start temperature is set to be 10 to 100° C., a heating finish temperature is set to be 220 to 350° C., a time between the heating finish time and the heating start time is set to be a heating time, the quenched work for the rolling sliding member is heated so that a rate of temperature increase indicated by the following formula becomes 7 to 35° C./s rate of temperature increase=(heating finish temperature?heating start temperature)/heating time, the work is tempered by being cooled without being maintained at a heating finish temperature from the heating finish time.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: February 4, 2014
    Assignee: JTEKT Corporation
    Inventors: Towako Matsui, Katsuhiko Kizawa
  • Patent number: 8596875
    Abstract: A bearing constituent member includes a surface layer, at least one of particles composed of vanadium nitride having a particle diameter of 0.2 to 2 ?m and particles composed of vanadium carbonitride having a particle diameter of 0.2 to 2 ?m are present in the surface layer ranging from the surface to a depth of 10 ?m and at least one of the area ratio of the particles composed of vanadium nitride having a particle diameter of 0.2 to 2 ?m and the particles composed of vanadium carbonitride having a particle diameter of 0.2 to 2 ?m in the surface layer ranging from the surface to a depth of 10 ?m is 1 to 10%.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: December 3, 2013
    Assignee: JTEKT Corporation
    Inventors: Katsuhiko Kizawa, Tsuyoshi Mikami, Kentarou Ono, Chikara Nakajima
  • Patent number: 8511904
    Abstract: A ready-to-install needle bearing including a thin-walled outer ring (1) that is shaped without cutting and is provided with radially inwardly-facing stop rims (2) on both sides. Needle rollers (7) roll between the stop rims (2) on an associated external raceway (9). The inventive needle bearing is characterized in that an associated internal raceway (10) is formed by a thin-walled inner ring (3) which is shaped without cutting and is fitted with radially outwardly-facing stop rims (4) on both sides. The needle rollers (7) roll in a cageless manner or are disposed in a cage such that a captive ready-to-install needle bearing unit is created by using a positive gripping action, thus dispensing with the need for a part that is to be mounted having to act as a raceway.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: August 20, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Erich Lunz
  • Patent number: 8453528
    Abstract: An outer ring, an inner ring and a ball serving as mechanical components configuring a deep groove ball bearing are formed of steel containing at least 0.11 mass % and not more than 0.15 mass % of carbon, at least 0.1 mass % and not more than 0.25 mass % of silicon, at least 0.15 mass % and not more than 0.35 mass % of manganese, at least 3.2 mass % and not more than 3.6 mass % of nickel, at least 4 mass % and not more than 4.25 mass % of chromium, at least 4 mass % and not more than 4.5 mass % of molybdenum and at least 1.13 mass % and not more than 1.33 mass % of vanadium with a remainder consisting of iron and impurity, and have raceway/rolling contact surfaces, the surface being included in a region having a nitrogen enriched layer having a nitrogen concentration of at least 0.05 mass %, the nitrogen enriched layer having a carbon concentration and the nitrogen concentration, in total, of at least 0.55 mass % and not more than 1.9 mass % at a depth of 0.1 mm from the surface.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: June 4, 2013
    Assignee: NTN Corporation
    Inventors: Chikara Ohki, Kazuhiro Yagita, Takashi Ito, Hiroshi Morishita
  • Patent number: 8440322
    Abstract: The copper alloy (lining) prevails in an overwhelmingly large amount in a plain-bearing layer structure. Cu of the plain bearing copper-alloy diffuses into the Sn-based overlay diffuses into the Sn-based overlay and detrimentally impairs the performance of the overlay. The present invention takes a measure against this problem. An Sn-based overlay having a thickness of 3 to 19 ?m is deposited by electro-plating without an intermediate layer for diffusion prevention on a plain-bearing layer, which contains Sn and Ni in a total amount of more than 4 mass % to 20 mass % (the minimum amount of Sn is 4 mass %) and has a hardness of Hv 150 or less.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: May 14, 2013
    Assignee: Taiho Kogyo Co., Ltd.
    Inventors: Shigeyuki Suga, Hitoshi Wada, Takashi Tomikawa
  • Publication number: 20130108203
    Abstract: Disclosed are pneumatic bearings with a bonded polymer film wear surface and production methods thereof. For example, a pneumatic bearing for supporting a payload is disclosed. The pneumatic bearing has a bearing surface having a polyimide film fastened to a substrate with a bonding layer. The polyimide film can comprise poly-oxydiphenylene-pyromellitimide and the bonding layer can comprise diglycidyl ether of bisphenol A, 1,4-butanediol diglycidyl ether, and 2,2,4-trimetylhexametylen-1,6-diamin.
    Type: Application
    Filed: April 6, 2011
    Publication date: May 2, 2013
    Applicant: ASML Holdings N.V.
    Inventors: Dragos Pariza, Santiago E. Del Puerto
  • Patent number: 8430571
    Abstract: A sliding bearing for engine applications, in particular a sliding bearing shell for the mounting of the crankshaft or the camshaft or for use as a connecting-rod bearing shell, has a metallic supporting layer and, applied on top of that, a bearing metal layer of aluminum alloy, copper alloy or brass, the bearing metal layer having an 8-20 ?m thick PTFB-free PAI-based coating applied on top of it, the PAI-based coating having 5-15% by weight zinc sulphide, 5-15% by weight graphite and 5-15% by weight TiO2 with the ratio of zinc sulphide and graphite respectively to TiO2 in terms of their percentage by weight being 0.6-1.4 and the zinc sulphide and TiO2 being present in a particle size of ?0.7 ?m.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: April 30, 2013
    Assignee: KS Gleitlager GmbH
    Inventors: Wolfgang Bickle, Werner Schubert, Frank Haupert, Gunter Buerkle
  • Patent number: 8425120
    Abstract: Disclosed herein is an electrolytic erosion preventing insulated rolling bearing and a manufacturing method thereof. In one embodiment, the electrolytic erosion preventing insulated rolling bearing includes an insulating coating being a ceramic coating layer including alumina as the main component and 0.01 to 0.2 percent by weight titanium oxide with the alumina having a particle size ranging from 10 to 50 ?m and average particle size ranging from 15 to 25 ?m.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: April 23, 2013
    Assignee: NSK Ltd.
    Inventors: Katsuhiro Konno, Kenji Kotaki, Takashi Murai, Osamu Fujii, Tetsuo Watanabe, Takayuki Matsushita
  • Patent number: 8418332
    Abstract: Surface texturing is employed to modify the topography of one or more surfaces (radial or cylindrical) of the bearing system for a roller cone rock bit. The surface texturing results in a dimpled surface which retains additional lubricant helpful in reducing friction in the boundary and mixed lubrication regimes. Shot peening is disclosed as one method for texturing the desired surface.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: April 16, 2013
    Assignee: Varel International Ind., L.P.
    Inventor: Xiaobin Lu
  • Publication number: 20130064490
    Abstract: A sliding bearing surface may have at least one thermal spray coating applied to the bearing surface to form a sliding bearing lining layer. A method of forming the sliding bearing lining, the method comprising applying the thermal spray coating to the bearing surface uses a thermal spray technique.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 14, 2013
    Inventors: Ronald G. Brock, II, Daniel M. Lonowski, David Domanchuk, Thomas Stong
  • Patent number: 8376625
    Abstract: A wheel supporting roller bearing in which a pitch circle diameter of an outboard row is larger than a pitch circle diameter of an inboard row. Thermally-hardened layers are formed, at two locations along an axial direction, in portions of an inner circumferential surface of an outer ring including outer ring raceways. The thermally-hardened layers are separated from each other by an unhardened portion in an axially middle portion of the outer ring. A non-cylindrical curved portion having an arcuate generatrix is provided on the axially middle portion of the inner circumferential surface of the outer ring between the outer ring raceways. A thickness of the thermally-hardened layer in the portion including the outer ring raceway on an axially outer side is larger than a thickness of the thermally-hardened layer in the portion including the outer ring raceway on the axially inner side.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: February 19, 2013
    Assignee: NSK Ltd.
    Inventor: Tatsuo Wakabayashi
  • Patent number: 8366322
    Abstract: A shaft member for a fluid dynamic bearing device that has a recess to cause a dynamic pressure effect of a fluid in a bearing clearance, which is formed on it by rolling, and where a surface layer portion of the recess and a surface layer portion of a surrounding region of the recess has a nitride layer, and where nitrogen is diffused and penetrated in a material of the shaft member that is formed by nitriding after the rolling.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: February 5, 2013
    Assignee: NTN Corporation
    Inventors: Kenji Hibi, Yasuhiro Yamamoto
  • Publication number: 20130019666
    Abstract: An inspection method which quantitatively and simply assures a nitrogen concentration in a carbonitriding-treated bearing part, and a bearing part and a bearing for which a nitrogen concentration is quantitatively assured are obtained. An inner race, an outer race, and balls as bearing parts are each a bearing part made of JIS standard SUJ2 and having a carbon nitrided layer formed in a surface thereof, wherein, after heat treatment at a heating temperature of 500° C. for a retention time of one hour is performed, a Vickers hardness at a position with a depth of 30 ?m from the surface is higher than a Vickers hardness at a core portion, which is a region where the carbonitrided layer is not formed in a thickness direction of the bearing part, by not less than 130 HV.
    Type: Application
    Filed: March 29, 2011
    Publication date: January 24, 2013
    Applicant: NTN CORPORATION
    Inventor: Chikara Ohki