Skew Prevention; Formular Relationship Patents (Class 384/450)
  • Patent number: 10890213
    Abstract: A value of R/RBASE is not smaller than 0.75 and not greater than 0.87 where R represents a reference radius of curvature of a larger end face of a roller and RBASE represents a distance from an apex of a cone angle of the roller to a larger flange surface of an inner ring 13. A distance from an outermost surface of at least any one of an outer ring, the inner ring, and a plurality of rollers to a bottom of a nitrogen enriched layer is not shorter than 0.2 mm. A crowning profile is formed on a rolling surface of the roller.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: January 12, 2021
    Assignee: NTN CORPORATION
    Inventors: Takashi Kawai, Tomoki Matsushita
  • Patent number: 10883542
    Abstract: A ring for use in a roller bearing includes an outer wall. The ring further includes two side walls extending away from the outer wall, defining a cavity therebetween for receiving at least one roller, and each of the two side walls having an outer edge at a location facing the cavity and farthest from the outer wall. The ring further includes a curved crown extending inward from at least one of the two side walls and configured to contact the at least one roller to reduce wear of the outer edge.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: January 5, 2021
    Assignee: RAYTHEON TECHNOLOGIES CORPORATION
    Inventor: Brady Walker
  • Patent number: 10859113
    Abstract: A bearing arrangement for a fluid machinery application employing an axially locating bearing. The axially locating bearing includes: a first angular self-aligning contact bearing arranged next to a second angular self-aligning contact bearing. Each of the first angular self-aligning contact bearing and the second angular self-aligning contact bearing includes a set of rolling elements arranged in a row and interposed between a respective curved inner raceway and an associated curved outer raceway. Each roller is a symmetrical cylindrically-shaped roller having a curved raceway-contacting surface. Each roller is inclined respective to the axial direction of the shaft by a respective contact angle. The rollers support an axial force and a radial force. The axially non-locating bearing position is arranged spaced apart from the axially locating bearing position, as seen in the axial direction. Examples of fluid machinery applications include: a wind turbine, water turbine or a propulsion turbine.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: December 8, 2020
    Assignee: Aktiebolaget SKF
    Inventors: Arne Lars Jonas Kullin, Juergen Reichert, Hans Wendeberg
  • Patent number: 10830279
    Abstract: In a tapered roller bearing, a cage includes a plurality of trapezoidal pockets and the pockets accommodate and hold a plurality of rollers. A notch having a width is provided in a post on a smaller width side of the pocket of the cage from a boundary between a smaller annular portion and a post toward a larger annular portion. Lubricating oil which flows from an inner diameter side of the cage toward an inner ring is quickly discharged through the notch toward an outer ring on an outer diameter side. A distance from an outermost surface of at least any one of the outer ring and the inner ring of the roller and a plurality of rollers to a bottom of a nitrogen enriched layer is equal to or longer than 0.2 mm. A rolling surface of the roller is provided with a logarithmic crowning profile.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: November 10, 2020
    Assignee: NTN CORPORATION
    Inventors: Takashi Kawai, Tomoki Matsushita
  • Patent number: 10816034
    Abstract: A tapered roller bearing includes inner and outer rings having tapered raceway surfaces. The inner ring also includes large-collar and small-collar surfaces respectively on large-diameter and small-diameter sides of its raceway surface. A plurality of tapered rollers are arrayed between the raceway surfaces. Each of the tapered rollers has a large end surface that contacts and is guided by the large-collar surface. A set curvature radius (R) of the large end surface of each of the tapered rollers and a base curvature radius (RBASE) from a vertex of a cone angle of each of the tapered rollers to the large-collar surface has a ratio R/RBASE in a range of 0.75 to 0.87, and when RACTUAL represents an actual curvature radius of the large end surface, a ratio RACTUAL/R is equal to or larger than 0.5.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: October 27, 2020
    Assignee: NTN CORPORATION
    Inventors: Tomoki Matsushita, Takashi Kawai
  • Patent number: 10767698
    Abstract: A one-way snap-in cage for a deep groove ball bearing having an annular backbone portion and a hanging out portion extending from the backbone portion towards an axial side. The hanging out portion including a pocket for accommodating a rolling element of a bearing in a circumferential direction and a pocket connection used to connect adjacent pockets. A bottom portion of the pocket is formed integrally with the backbone portion. The ratio Hc/Dw of a radial size Hc of the cage in terms of thickness to the diameter Dw of the rolling element of the bearing satisfies the relation 17.679%?Hc/Dw?37.389%, the radial size Hc of the cage is equal in value to half of the difference between the maximum outer diameter Dc_max and the minimum inner diameter Dc_min of the cage. The present invention further provides a deep groove ball bearing using the cage.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: September 8, 2020
    Inventors: Hongyuan An, Yvonne Yang
  • Patent number: 10495142
    Abstract: The roller bearing provides an inner ring, an outer ring, and at least one row of oblique contact rollers arranged between bearing races, of the rings. Each of the rings provides a guide face, which is in contact with end faces, of the rollers. A point of intersection of the axis of rotation of each roller of the row with each guide face, of the rings is situated at an equal distance from inner, and outer, edges of the guide face.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: December 3, 2019
    Assignee: AKTIEBOLAGET SKF
    Inventors: Cyril Bouron, Herve Dondaine
  • Patent number: 10197094
    Abstract: A double-row spherical roller bearing, comprising: an outer ring having an radially inner spherical raceway and a radially outer peripheral surface, an inner ring having a radially outer curved-shaped raceway, and roller elements arranged in two axially displaced rows. The outer ring includes an outer peripheral surface first circumferential groove. The first circumferential groove has an axial outer peripheral surface width X fulfilling the following relation: L1?X?L2, L2 extends between first end point (intersecting the first normal vector and the outer peripheral surface) and second outer peripheral surface axial end points (intersecting a second normal vector and the outer peripheral surface). The first normal vector is an inverted normal vector of the outer raceway. The second normal vector is an inverted normal vector of the inner raceway. L1 has a length of L2*?. End points of L1 are located equidistant to each respective first and second end point of L2.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: February 5, 2019
    Assignee: Aktiebolaget SKF
    Inventors: Emma Bjorkman, Peter James, Marcus Loof, Lars Stigsjöö
  • Patent number: 10100875
    Abstract: A bearing includes an inner raceway and an outer raceway extending about a rotational axis. The outer raceway is spaced radially from the inner raceway such that an annular cavity is defined between the inner raceway and the outer raceway. The bearing also includes a plurality of first rollers disposed in the annular cavity. Each first roller of the plurality of first rollers includes a first end, a second end spaced axially from the first end, and a first surface extending between the first end and the second end. A first profile drop extends between the first end and the first surface. A second profile drop extends between the second end and the first surface. The second profile drop differs from the first profile drop. The bearing further includes a plurality of second rollers disposed in the annular cavity and spaced axially from the plurality of first rollers.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: October 16, 2018
    Assignee: General Electric Company
    Inventor: Fabio Nonato de Paula
  • Patent number: 10077808
    Abstract: An edge flap arrangement for an aircraft wing includes a main flap element and an actuator for moving the main flap element relative to the aircraft wing. A linkage arrangement supports the main flap element and includes a drop hinge link arrangement having a fixed strut secured to the aircraft wing and a drop link secured to the main flap element. The fixed strut and the drop link are connected by a hinge point having an hourglass bearing assembly having hourglass shaped rollers with a circular cross section symmetrical about a longitudinal axis, first and second axial ends, and an exterior surface. The exterior surface defines a concave engagement surface having a first radius of curvature R1 and a second radius of curvature which is greater than the first radius of curvature R1. The first radius of curvature is between 50 and 95 percent of the second radius of curvature.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: September 18, 2018
    Assignee: Roller Bearing Company of America, Inc.
    Inventors: John H. Cowles, Jr., Alex Habibvand, Richard Murphy
  • Patent number: 10060477
    Abstract: A tapered roller bearing includes an inner ring with a large rib, an outer ring, and multiple tapered rollers. Each of the tapered rollers has, at its axial end, a large end face that is a convex surface. The large rib has a rib face that is a concave surface and that is in contact with the large end face. When a distance from a position of contact between the large end face and the rib face to a cone center of the corresponding tapered roller is defined as R, a curvature radius of the large end face is defined as Rr, and a curvature radius of the rib face is defined as Ri, an inequality represented by 2?(Ri ?R)/(R?Rr)?10 is satisfied, where Rr<R<Ri.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: August 28, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Junji Murata, Shigeo Kamamoto, Yuki Shishihara
  • Patent number: 10060479
    Abstract: A bearing assembly having an inner race ring (14) that defines an inner raceway and an outer race ring that defines an outer raceway on which the plurality of rolling elements (22) roll. The bearing raceways are machined using surface finishing operations to create preferred surface profiles and textures for improving lubrication performance. The profile of the raceway is initially created using a first grinding process to form a rough surface profile including a rough central band (34) and rough recessed side bands (38). A second grinding process is used to smooth the central band. This raceway surface profile increases lubrication performance.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: August 28, 2018
    Assignee: The Timken Company
    Inventors: Xiaolan Ai, Ryan D. Evans, Luc Houpert
  • Patent number: 10012265
    Abstract: In one aspect, the present invention resides in an edge flap arrangement for an aircraft wing that has a main flap element and an actuator for moving the main flap element relative to the wing, a linkage arrangement that supports the main flap element from the aircraft wing for movement relative to the wing, the linkage arrangement including a drop link and a hinge point. The fixed strut and the drop link are pivotally connected by the hinge point. The hinge point includes a bearing. The bearing is an hourglass bearing assembly that has an inner raceway outer raceway. The outer raceway is positioned around the inner raceway. A plurality of rollers is disposed between the inner raceway and the outer raceway. The plurality of rollers, the outer raceway and/or the inner raceway are manufactured from CREN and/or CRES.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: July 3, 2018
    Assignee: Roller Bearing Company of America, Inc.
    Inventors: Alex Habibvand, Frederick S. Gyuricsko, Jay Phoenix, Arnold E. Fredericksen, John H. Cowles, Jr.
  • Patent number: 9982718
    Abstract: A tapered roller bearing includes an outer ring, an inner ring, tapered rollers, a cage, and a lubricant holding member. The cage is formed of resin. Since the cage is formed of resin, the tapered roller bearing can be downsized with contact between the cage and the lubricant holding member avoided.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: May 29, 2018
    Assignee: JTEKT CORPORATION
    Inventor: Akiyuki Suzuki
  • Patent number: 9897147
    Abstract: A bearing seal is provided having inner and outer frames capable of forming a tight fit with a bearing inner ring and with a bearing outer ring respectively. The frames adjacent to each other, at least one of the two formed with an axial lip abutting an inner surface of the other in an axial direction and a radial lip abutting an inner surface of the other in a radial direction, for sealing an axial gap and a radial gap. A flexible convolute structure formed on the radial lip, and the convolute structure is initially formed with at least two hinge points. The hinge points are points of connection and intersection between adjacent bend surfaces in the convolute structure, being the locations of the principal regions where the material actually deforms by bending between adjacent bend surfaces. Predetermined bend angles are formed at the hinge points between adjacent bend surfaces.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: February 20, 2018
    Assignee: AKTIEBOLAGET SKF
    Inventors: Gianni Cognolato, Nora Li, Monica Chen, Zongbin Wu
  • Patent number: 9890814
    Abstract: A cage for an hourglass roller bearing includes an annular ring having a first axial face and a second axial face. A plurality of first rails extend from the first axial face and a plurality of second rails extend from the second axial face. The cage includes a plurality of pockets. Each of the plurality of pockets is defined by opposing circumferentially facing walls of at least one of adjacent pairs of the first rails and adjacent pairs of the second rails. The circumferentially facing walls are arcuately formed so that each of the plurality of pockets is cylindrical.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: February 13, 2018
    Assignee: Roller Bearing Company of America, Inc.
    Inventor: Alex Habibvand
  • Patent number: 9784309
    Abstract: An angular contact self-aligning toroidal roller bearing comprising an inner ring, an outer ring, and a set of rolling elements formed of rollers arranged in an intermediate configuration between the inner and outer rings. Each roller is arranged to self orient in its axial direction in relation to the inner and outer rings in a loaded zone during operation. Furthermore, a method for determining dimensional parameters of structural members of an angular contact self-aligning toroidal rolling element bearing and a method for manufacturing an angular contact self-aligning toroidal rolling element bearing are described herein.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: October 10, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventors: Magnus Kellstrom, Arne Lars Jonas Kullin, Andreas Lofqvist
  • Patent number: 9618043
    Abstract: A bearing ring for a roller bearing includes a raceway configured to support at least one rolling-element roller and a flange at an end of the raceway extending away from the raceway and having an abutment surface for guiding the at least one rolling-element roller on the raceway. The abutment surface has a curvature that decreases monotonically from a starting point on the abutment surface to an end of the abutment surface, and the abutment surface includes at least one strongly monotonically decreasing segment.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: April 11, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventors: Baozhu Liang, Michael Reugels
  • Patent number: 9561845
    Abstract: An edge flap arrangement for an aircraft wing includes a main flap element and an actuator. A linkage arrangement supports the main flap. The linkage arrangement includes a drop hinge link arrangement. The drop hinge link arrangement includes a fixed strut and a drop link. The fixed strut and the drop link are pivotally connected by a hinge point. The hinge point includes an hourglass bearing. The hourglass bearing includes an inner member, an outer member, and a plurality of hourglass rollers. Any combination of the inner member, the outer member, and the hourglass rollers are fabricated from CREN, Cronidur 30, XD15NW, 422 Stainless Steel, CRES, and/or 440C Stainless Steel. A cage is disposed between the inner member and the outer member. The cage includes a plurality of first rails and a plurality of second rails. Opposing pairs of first rails and second rails define a plurality of pockets.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: February 7, 2017
    Assignee: Roller Bearing Company of America, Inc.
    Inventors: Alex Habibvand, John H. Cowles, Jr., Richard Murphy
  • Patent number: 9410107
    Abstract: A grease composition for a rolling bearing for a motor to support a rotor of the motor, containing a pentaerythritol ester base oil with a kinematic viscosity at 40° C. of 20 to 55 mm2/s; 7 to 13 mass % of a diurea thickener represented by formula (A) where each R group is defined; and a rust inhibitor mixture selected from the group consisting of polyol ester type rust inhibitors and organic sulfonate type rust inhibitors. The grease composition can prevent a peculiar noise from being produced at low temperatures, satisfy the low torque performance over a wide temperature range, extend the bearing lubrication life even under the circumstances of high temperature, and exhibit excellent rust inhibiting effect on varnish.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: August 9, 2016
    Assignees: KYODO YUSHI CO., LTD., NTN CORPORATION
    Inventors: Ryo Aida, Yutaka Imai, Kenta Sakaguchi
  • Patent number: 9322468
    Abstract: A ring that includes an inner peripheral surfaces that surrounds an outer peripheral surface of a pinion shaft provided through a pinion, a gear-side end surface, a bearing-side end surface, and an outer peripheral surface inclined from the gear-side end surface toward an outer peripheral edge of the bearing-side end surface is provided between the pinion and an inner race. When the length from an outer peripheral edge of the outer peripheral edge of the gear-side end surface to an axial line of the pinion shaft is L10, the length from a tooth root of a large gear to the axial line is L11, the length from an outer peripheral edge of a gear-side end surface of a large-diameter-side flange portion to the axial line is L2, and the length from the outer peripheral edge of the bearing-side end surface to the axial line is L3, L10<L11 and L3?L2.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: April 26, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Hideo Terasawa
  • Patent number: 9291241
    Abstract: A vehicle-use transmission includes: an input shaft into which a driving force from an engine is inputted; a power extraction shaft for transmitting the driving force of the input shaft to front wheels; a transmission mechanism for transmitting the driving force of the input shaft to rear wheels; and a rear-wheel intermediate shaft provided in a power transmission path between the power extraction shaft and the transmission mechanism. The rear-wheel intermediate shaft transmits the driving force through a helical gear attached to the rear-wheel intermediate shaft. Further, the rear-wheel intermediate shaft is supported by tapered roller bearings.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: March 22, 2016
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Seiji Itoo, Ayumi Hamada, Taisuke Morita
  • Patent number: 9243664
    Abstract: A toroidal roller bearing, which comprises an outer ring, an inner ring and a plurality of roller elements interposed between the outer and inner rings, wherein the toroidal roller bearing allows for angular and axial displacement between the outer ring and the inner ring. The bearing includes a cage for holding the roller elements, wherein the cage provides an axial guiding feature for axially guiding the roller elements against at least one of the outer ring, inner ring and a separate element located outside the toroidal roller bearing.
    Type: Grant
    Filed: April 17, 2013
    Date of Patent: January 26, 2016
    Assignee: AKTIEBOLAGET SKF
    Inventors: Hans Wendeberg, Linus Efraimsson
  • Patent number: 9239077
    Abstract: A mechanical bearing having an outer ring and an inner ring, centered on a same bearing axis, the outer ring being arranged radially around the inner ring, and a cage, arranged coaxially between the inner ring and the outer ring and housing cylindrical rollers, with this cage being formed by several disjointed tubular portion which, in the assembled state of the bearing, are separated from each other by a non-zero gap. The cage is formed by at least three disjointed tubular portions that do not cooperate mechanically with each other in assembled state of the bearing.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: January 19, 2016
    Assignees: AKTIEBOLAGET, SKF AEROSPACE FRANCE S.A.S.
    Inventors: Thomas Doki-Thonon, Alexandre Aury, Pascal Deloeil
  • Patent number: 9033584
    Abstract: At least the surfaces of rolling elements of a rolling bearing are each randomly formed with an innumerable number of microconcave-like pits. The surface roughness parameter Ryni of the surfaces provided with the pits is in a range of 0.4 to 1.0 ?m, and the Sk value is ?1.6 or below.
    Type: Grant
    Filed: May 6, 2005
    Date of Patent: May 19, 2015
    Assignee: NTN CORPORATION
    Inventors: Takashi Tsujimoto, Rino Fukami, Seiji Kanbara
  • Patent number: 9011018
    Abstract: A roller bearing of the type having a flange on which thrust loads are received shows improved ability to form an oil film at the contact surface portions of the end surface of a roller and the flange. The contact surface portions are both inclined at an angle of not less than 0.1° and not more than 1.5° with respect to the radial direction, over the entire circumferences of the respective contact surface portions.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: April 21, 2015
    Assignee: NTN Corporation
    Inventor: Kohei Toda
  • Patent number: 8979382
    Abstract: With the inner race and shaft fitted with a clearance fit, the bearing satisfies the relation: t/w>0.5, where t is an inner race minimum thickness at a contact area between each rolling element and the inner race raceway, in the direction perpendicular to the raceway, and w is the circumferential distance between adjacent rolling elements (w=?×SD/Z, Z is the number of rolling elements, and SD is the bearing inner diameter). With the outer race and housing fitted with a clearance fit, the bearing satisfies the relation: t/w>0.5, where t is the inner race minimum thickness at a contact area between each rolling element and the outer race raceway, in the direction perpendicular to the raceway, and w is the circumferential distance between adjacent rolling elements (w=?×LD/Z, LD is the bearing inner diameter).
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: March 17, 2015
    Assignee: NTN Corporation
    Inventor: Tsuyoshi Niwa
  • Patent number: 8858088
    Abstract: In a tapered roller bearing assembly, a crowning profile formed portion of the roller rolling surface is made up of a contact area crowned portion, which is held in contact with an inner ring raceway surface, and a non-contact area crowned portion which is held in non-contact with the inner ring raceway surface. The contact area crowned portion and the non-contact area crowned portion have their generatrices extending in an axial direction of a roller, which generatrices are represented by corresponding continuous lines represented by different functions and continued smoothly at a point of connection, and the curvature of the generatrix of the non-contact area crowned portion in the vicinity of the connection point is chosen to be smaller than the curvature of the generatrix of the contact area crowned portion.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: October 14, 2014
    Assignee: NTN Corporation
    Inventor: Hiroki Fujiwara
  • Publication number: 20140301684
    Abstract: A spacer for a rolling bearing, most notably for use in a wind turbine is provided. The spacer is adapted for a rolling bearing having an inner ring, an outer ring and at least one row of angular contact rollers disposed between raceways provided on the rings. The spacer includes two opposite faces 17, 18 having a concave profile adapted to the rollers, each face comprising at least a contact surface 17a, 18a with the associated roller having the shape of a cylinder segment. The axes of the cylinder segments of the contact surfaces converge.
    Type: Application
    Filed: September 2, 2011
    Publication date: October 9, 2014
    Inventors: Cyril Bouron, Jean-Baptiste Magny, Pascal Ovize
  • Publication number: 20140112606
    Abstract: A self aligning bearing assembly comprising a split inner ring and a split outer ring, and two rows of rolling elements arranged at different contact angles, for supporting a main shaft of a wind turbine.
    Type: Application
    Filed: October 17, 2013
    Publication date: April 24, 2014
    Inventors: Ryan Greenfield, Martin O'Shea, Antonio Silverio, Daniel M. Brake, Martin E. Lohan, Gregory John Smith
  • Publication number: 20140112607
    Abstract: A self aligning bearing assembly comprising an inner ring and an outer ring, and two rows of rolling elements of equal length arranged at different contact angles, for supporting a main shaft of a wind turbine.
    Type: Application
    Filed: October 17, 2013
    Publication date: April 24, 2014
    Applicant: SCHAEFFLER TECHNOLOGIES AG & CO. KG
    Inventors: Antonio Silverio, Ryan Greenfield
  • Patent number: 8651746
    Abstract: The present invention provides a rolling bearing capable of suppressing the generation of retainer noise and abnormal vibration by specifying the circumferential width of axial grooves formed on the guide face of an outer ring guide retainer or an inner ring guide retainer. In a rolling bearing 1 according to the present invention, axial grooves 13 are formed on the outer circumferential face of the outer ring guide type retainer 10 thereof.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: February 18, 2014
    Assignee: NSK Ltd.
    Inventor: Yoshifumi Sugita
  • Patent number: 8641290
    Abstract: A tapered roller bearing according to the present invention, in which the rolling surface of a tapered roller and raceway surfaces of internal and outer rings undergoes crowning. The total crowning amount of that crowning and the crowning amount of each raceway surface and rolling surface are set to preferred values. This allows reduction of the rolling friction of the internal and outer rings and the tapered roller, and the rotation torque of the tapered roller bearing according to the present invention.
    Type: Grant
    Filed: February 21, 2005
    Date of Patent: February 4, 2014
    Assignee: JTEKT Corporation
    Inventors: Koji Kawaguchi, Yuzuru Takahashi, Kiyoshi Ogino, Hiroki Matsuyama
  • Publication number: 20130129269
    Abstract: A double-row self-aligning roller bearing (1) with a plurality of roller bodies (4) rolling about a bearing axis (14) on a race of an inner ring in two bearing rows (15, 16). A pressure angle (?) of a first bearing row (15) is different from a pressure angle (?) of a second bearing row (16) and/or a roller length (L1) of roller bodies (4) of a first bearing row (15) is different from a roller length (L2) of roller bodies (4) of a second bearing row (16). The inner ring (3) is divided peripherally and is formed from at least two sub-rings (3?, 3?).
    Type: Application
    Filed: November 9, 2012
    Publication date: May 23, 2013
    Applicant: SCHAEFFLER TECHNOLOGIES AG & CO. KG
    Inventor: Schaeffler Technologies AG & Co. KG
  • Patent number: 8439574
    Abstract: A tapered roller bearing includes an outer ring, an inner ring, a tapered roller interposed between the outer ring and the inner ring, and a cage holding the tapered roller. The tapered roller bearing is for being used in an idler portion of an automobile transmission that switches between an idle state in which the outer ring rotates freely in relation to the inner ring and a shift state in which the outer ring rotates synchronously with the inner ring. In one embodiment, the tapered roller bearing has a ratio of roller dynamic load rating Cr to static load rating Cor of Cor/Cr?1.4. In an alternative embodiment, MoS2 processing is performed on a surface of the tapered roller and the tapered roller bearing has a ratio of roller dynamic load rating Cr to static load rating Cor of Cor/Cr?1.3.
    Type: Grant
    Filed: September 1, 2008
    Date of Patent: May 14, 2013
    Assignee: NTN Corporation
    Inventors: Tomoki Matsushita, Yasuhiro Kanbori, Takashi Ueno
  • Patent number: 8414194
    Abstract: A cylindrical roller bearing assembly capable of increasing the load bearing capability with respect to the thrust load and of easily controlling the shape of the cylindrical roller is provided. The cylindrical roller bearing assembly includes an inner ring, an outer ring and a plurality of cylindrical rollers. One or both of the inner and outer rings has/have a collar. A surface portion encompassed within the region of radial dimensions of 0.12 Da to 0.20 Da as measured from an outer diametric edge of an end face of each of the cylindrical rollers to a roller axis, wherein Da represents an outer diameter of each of the cylindrical rollers is rendered to be a crowned portion of a tapered shape inclined at an angle ?r of 0.25 to 1° relative to a plane perpendicular to the roller axis.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: April 9, 2013
    Assignee: NTN Corporation
    Inventor: Hideji Ito
  • Patent number: 8407896
    Abstract: A system and method for reducing roller skew, which involve ascertaining first and second thrust load properties applied to a roller while a rotary body rotates in opposing rotational directions, and adjusting an orientation of at least one bearing assembly for the roller until an amplitude difference between the first and second thrust load properties is below a predetermined threshold.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: April 2, 2013
    Assignee: Phillips Kiln Services Ltd.
    Inventor: Walter M. Gebhart
  • Publication number: 20130011089
    Abstract: A ball bearing having first and second races and, disposed in a gap between the two races, a row of balls of radius RK that roll along facing tracks of the two races, wherein centers of the balls move on a circular path surrounded by a torus circumscribing all the balls of the row and having the toroidal radius RK, a toroidal angle coordinate ?, and a poloidal angle coordinate ?, wherein each track has with each ball two nearly punctiform contact areas P1, P2; P3 P4 at respective contact angles ?P1, ?P2; ?P3 and ?P4, wherein the cross section of the track in the region of the contact points P1 . . . P4 has a finite transverse radius of curvature RL1 . . . RL4, with RLv>RK, and wherein in the vicinity of a contact point P1 . . . P4 the transverse radius of curvature (RL) is a continuous and differentiable function of the poloidal angle coordinate ?: RL=RL(?) that increases outward from the respective contact point P1 . . . P4 in both poloidal directions: RL(?)?RL(?Pv).
    Type: Application
    Filed: December 3, 2010
    Publication date: January 10, 2013
    Inventor: Hubertus Frank
  • Patent number: 8226300
    Abstract: A tapered roller bearing is capable of suppressing the occurrence of fretting without shortening its fatigue life. The tapered roller bearing includes an outer race, an inner race, a plurality of taper rollers interposed between the outer race and the inner race, and a retainer for retaining the tapered rollers. The tapered roller bearing is used in an idler portion of an automobile transmission, which is interchanged between an idle state in which the outer race idles with respect to the inner race and a shift state in which the outer race and the inner race are rotated synchronously with each other. A ratio of ?/??4.9 is established on a premise that an outer-race raceway surface angle is 2? and a roller angle is ?.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: July 24, 2012
    Assignee: NTN Corporation
    Inventors: Takashi Tsujimoto, Yasuhiro Kanbori
  • Patent number: 8197146
    Abstract: At least on a surface of a rolling element of a rolling bearing, innumerable minute concave recesses are randomly formed. An area percentage of the recesses on the surface having the recesses formed thereon is in a range from 5 to 20%, and a surface roughness parameter Rymax of the surface having the recesses formed thereon is in a range of 0.4 to 1.0.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: June 12, 2012
    Assignee: NTN Corporation
    Inventors: Takashi Tsujimoto, Rino Fukami
  • Patent number: 8104968
    Abstract: The sectional shape of a rolling surface of at least one of bearing component parts has the following relation between the order n (n being an arbitrarily chosen natural number) and the amplitude r of waviness relative to the circularity of the sectional shape. The order n and the amplitude r are logarithmically transformed to define X=Log(n) from the order n and Y=Log (rn) from the amplitude r of n-order. When a regression line Y=aX+b is determined, the ratio ?/? of the deviation ? at each X from the regression line of Y to the standard deviation ? is chosen to be smaller than 4.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: January 31, 2012
    Assignee: NTN Corporation
    Inventor: Yoshinobu Akamatsu
  • Patent number: 8057104
    Abstract: The angular contact roller bearing has an outer bearing ring, an inner bearing ring, a plurality of ball rollers arranged between the rings, and a bearing cage. The ball rollers in the two adjacent rows have pressure angle axes extending parallel to one another and are arranged directly one next to the other with their side faces point toward one another. Adjacent ball rollers in the two rows are arranged on a common rotational axis. The ball rollers have diameters and widths which are dimensioned in such a way that envelope cones which form tangents with all the ball rollers at their diameters are arranged with their cone tips precisely at the intersection point of the common rotational axes of the bearing longitudinal axis.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: November 15, 2011
    Assignee: Schaeffler KG
    Inventors: Heinrich Hofmann, Horst Doeppling, Rainer Eidloth, Gottfried Ruoff
  • Patent number: 8033737
    Abstract: A rolling bearing which has at least one bearing ring and a plurality of rollers. The bearing ring has a raceway for the rollers and at least one lateral rim for axially guiding the rollers. The roller has front face facing the rim and the rim has a rim hearing surface facing the roller. At least sections of at least the front face or the rim bearing surface have a toroidal camber in the direction of the rim bearing surface or the front face.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: October 11, 2011
    Assignee: Schaeffler KG
    Inventor: Jan De Mul
  • Patent number: 8016490
    Abstract: A thin-wall bearing, comprising a retainer (4) formed in a divided type having a plurality of resin plate-like members (5), (5), . . . curved along an inner ring (1) and an outer ring (2). The retainer (4) comprises pockets (6) opening to the axial end part thereof and rollingly holding balls (3). Slit-like through holes (14) extending in the axial direction and opening to the axial end part where the opening parts (7) of the pockets (6) are positioned are formed at the center parts of pillars (10) between the pockets (6) and (6) adjacent to each other. As a result, the thin-wall bearing can have excellent lubricity.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: September 13, 2011
    Assignee: NSK Ltd.
    Inventors: Masachi Hosoya, Toshiaki Yamaguchi, Tsuyoshi Saitou, Hiroyuki Itou, Yasushi Tomizuka, Toyohisa Yamamoto
  • Publication number: 20110216991
    Abstract: A system and method for reducing roller skew, which involve ascertaining first and second thrust load properties applied to a roller while a rotary body rotates in opposing rotational directions, and adjusting an orientation of at least one bearing assembly for the roller until an amplitude difference between the first and second thrust load properties is below a predetermined threshold.
    Type: Application
    Filed: May 16, 2011
    Publication date: September 8, 2011
    Applicant: PHILLIPS KILN SERVICES LTD.
    Inventor: Walter M. Gebhart
  • Patent number: 8007184
    Abstract: There is realized a self-aligning roller bearing with retainer that stabilizes the orientation of spherical rollers and prevents these spherical rollers from skewing, and which can be rotated at high speed, and furthermore which enables efficient lubricant feed into pockets 9. By rotating a turning tool 14 as it revolves, the surfaces on both sides in the circumferential direction of respective column sections are processed into concave curved surfaces that oppose a rolling surface of the respective spherical rollers across a pocket clearance into which lubricant oil can be fed. The length of the column sections 8c is less than the length in the axial direction of the spherical rollers, and greater than a half of the length, and an end portion of the side surface in the circumferential direction of the respective column sections 8c projects further in the circumferential direction than an intermediate portion thereof, and the spherical rollers are embraced in the pockets 9.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: August 30, 2011
    Assignee: NSK Ltd.
    Inventors: Takashi Murai, Toshiyuki Tanaka, Masatake Ichimaru
  • Publication number: 20110127867
    Abstract: There is provided a bearing assembly including: a sleeve having a hole; a shaft rotatably disposed in the hole; a thrust plate in contact with the end of the shaft to reduce friction in rotation of the shaft; and a holder accommodating the sleeve and the thrust plate and having a contact surface in contact with the thrust plate.
    Type: Application
    Filed: July 20, 2010
    Publication date: June 2, 2011
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Song Bon Oh, Sang Jae Song
  • Patent number: 7934873
    Abstract: A tapered roller bearing includes bearing rings including an inner ring and an outer ring, a roller rolling between the inner ring and the outer ring, and a cage having a pocket holding the roller and located adjacent to the outer ring. A radial clearance ? between the cage and the outer ring when the cage is in a neutral position, a radial clearance ?pr between the roller held in the pocket and the cage, and a circumferential clearance ?pc between the roller held in the pocket and the cage satisfy relations ?pr>?pc and ?2?(???pr)/(?pr??pc)?0.
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: May 3, 2011
    Assignee: NTN Corporation
    Inventors: Kazuyoshi Harada, Tomoya Sakaguchi
  • Patent number: 7922396
    Abstract: A double row self-aligning roller bearing in which spherical rollers are arranged in double rows between an inner ring and an outer ring, characterized in that the curvature radius of the ridge line of the spherical roller in one row is R1, the curvature radius of the ridge line of the spherical roller positioned in the other row is R2, the curvature radius of the inner ring track surface being in contact with the spherical roller in one row is N1, and the curvature radius of the inner ring track surface being in contact with the spherical roller in the other row is N2, a relation such that N1/R1>N2/R2 is satisfied.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: April 12, 2011
    Assignee: NTN Corporation
    Inventor: Nobuyuki Mori
  • Patent number: 7918649
    Abstract: A double-row self-aligning roller bearing includes left and right rows of rollers, arranged between an inner race and an outer race. A raceway surface of the outer race represents a spherical shape and the rollers have an outer peripheral surface following the shape of the raceway surface of the outer race. The rollers of the left and right roller rows have respective lengths different from each other. Also, the left and right roller rows have respective contact angles different from each other.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: April 5, 2011
    Assignee: NTN Corporation
    Inventors: Naoki Nakagawa, Masaharu Hori, Takeshi Maeda, Souichi Yagi, Mitsuo Sasabe, Nobuyuki Mori