Bearing Surface Treatment Patents (Class 29/898.13)
  • 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: 20150000138
    Abstract: A method of manufacturing a composite material bearing component includes designing a pattern of a fabric combination including a PTFE film, a quartz fabric and a glass fabric, which are stacked, in consideration of a final shape of a bearing, and stacking the fabric combination on a fusion surface which is a steel surface of a bearing structure of a composite material bearing; and simultaneously performing molding and fusing under conditions of a thermal treatment temperature of 300˜400° C. and a pressure of 30˜100 kgf/cm2, thereby manufacturing the composite material bearing. This composite material bearing functions as a self-lubricating high performance bearing, thus satisfying high performance requirements of the driving friction surface of a B&S (Ball & Socket) nozzle which is a thrust vector control nozzle and satisfying a high load and low friction efficient required of guided weapon components.
    Type: Application
    Filed: August 26, 2013
    Publication date: January 1, 2015
    Applicant: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Yunchul KIM, Hongsuk CHA
  • Patent number: 8857062
    Abstract: A sealed rolling bearing is proposed which makes it possible to reduce the torque loss while ensuring high sealing performance. Seal lips of seal members secured to the outer ring of the bearing at both ends thereof are in sliding contact with both ends of the outer periphery of the inner ring of the bearing. These portions of the inner ring that are in sliding contact with the seal lips are subjected to minute shot peening in which minute shots of molybdenum disulfide having a particle diameter of 20 to 200 micrometers are struck against these portions at a high speed of 50 meters per second. This decreases the friction torque attendant to sliding contact of the seal lips and makes it possible to decrease the torque loss of the bearing even if the contact pressure of the seal lips is increased sufficiently to ensure high sealing performance.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: October 14, 2014
    Assignee: NTN Corporation
    Inventor: Ken Yamamoto
  • Patent number: 8844140
    Abstract: A roller bearing having two cooperating rolling parts of which one is of ceramic and the other of a steel. The steel part is of such structure and/or material and/or is so produced to cause residual compressive stresses to form beneath the contact surface of the steel part, at least in a load-free state, down to a depth.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: September 30, 2014
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Oskar Beer, Franz-Josef Ebert, Gerhard Kreiselmeier, Edgar Streit
  • Publication number: 20140254970
    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: Application
    Filed: November 2, 2012
    Publication date: September 11, 2014
    Applicant: ROLLER BEARING COMPANY OF AMERICA, INC.
    Inventor: Werner B. Guilford
  • 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: 8789281
    Abstract: Methods of wearing-in superhard bearing elements over time so that hydrodynamic or near hydrodynamic lubrication of opposed bearing surfaces develops and thrust-bearing apparatuses. In an embodiment, a thrust-bearing apparatus including first and second thrust-bearing assemblies is received or provided. Each thrust-bearing assembly includes a support ring and a plurality of superhard bearing elements mounted circumferentially around the support ring. The superhard bearing elements of each thrust-bearing assembly are oriented so as to be opposed to one another.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: July 29, 2014
    Assignee: US Synthetic Corporation
    Inventors: Timothy N. Sexton, Craig H. Cooley, Cody W. Knuteson
  • Patent number: 8782902
    Abstract: A method of making a bearing includes providing a bearing intermediate, which is unfinished while having an overall shape of a finished bearing product; and repeatedly impacting a surface of the bearing intermediate at one or more ultrasonic frequencies to modify characteristics of the bearing intermediate. The resulting bearing intermediate or finished bearing product includes nano-size grains at or underneath the surface.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: July 22, 2014
    Assignee: Designmecha Co., Ltd.
    Inventors: Young Sik Pyun, Jeong Hyeon Park, Chang Sik Kim, In Ho Cho
  • 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: 8661686
    Abstract: A shell type outer ring 2 of a shell type needle roller bearing 1 is formed by a pressing combined with an ironing step, and the lubricating conditions in this ironing step on the outer-diameter ironed surface, which becomes the outer-diameter surface of the outer ring 2, are in a substantially fluid lubricating state so as to restrict the circumferential surface roughness of the inner-diameter surface, the inner-diameter roundness, and the amount of uneven thickness of the tubular portion to predetermined value ranges, thereby prolonging the life of the shell type needle roller bearing and lowering the acoustic level during use.
    Type: Grant
    Filed: May 8, 2009
    Date of Patent: March 4, 2014
    Assignee: NTN Corporation
    Inventors: Shinji Oishi, Masatoshi Niina
  • 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: 8590149
    Abstract: A method of manufacturing a lift transmitting component (2), particularly for a gas exchange valve train or a fuel pump drive of an internal combustion engine (1), is provided, The lift transmitting component includes a housing (6), a bearing pin (7) fixed in a reception bore (9) of the housing (6) and a roller (8) mounted through a sliding or a rolling bearing on the bearing pin (7). The bearing pin is core-hardened over an entire axial length to a core hardness of at least 650 HV, and pin ends (10) of the core-hardened bearing pin are radially widened relative to the reception bore for enabling a connection of the bearing pin to the housing (6) through positive engagement. The hardness of the bearing pin is at the most 780 HV, the radial widening of one of the pin ends being realized with a shaping die (11) which travels axially parallel to the bearing pin (7) and applies a force to the pin end in a transition region between a periphery and a front end surface of the bearing pin.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: November 26, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Marco Meisborn, Peter Kares
  • Publication number: 20130282130
    Abstract: A bearing component 2 for a joint replacement prosthesis comprises a first bearing element 4; a second bearing element 6, and a linking element 8, operatively connecting the first and second bearing elements 4, 6 and permitting relative motion there between. The flexible linking element 8 prevents dislocation of mobile bearings in a total knee replacement prosthesis. The invention also relates to a bridging element which retains the linking element 8 with some play, which acts as a ligament support 2051, and which causes a deflection of the line of action of a ligament 1018. A joint replacement prosthesis is also disclosed comprising a biasing element 1140 or a tensioning element 1220 operatively coupled to the artificial ligament 1018. The biasing element 1140 or tensioning element 1220 may be housed in the stem of a tibial tray 1006.
    Type: Application
    Filed: June 21, 2013
    Publication date: October 24, 2013
    Inventors: David Wolfson, Russell Llloyd, John Joseph O'Connor, Mohammed Imran Khan, David Wycliffe Murray, Christopher Alexander Dodd, John William Goodfellow
  • Patent number: 8510954
    Abstract: The invention refers to a bearing unit and a method for its manufacture incorporating an outer race ring (1), an inner race ring (4) having an inner envelope surface with an axially tapering saw-tooth profile (6), a thin-walled axially slotted sleeve (7), having a tapering saw-tooth profile (9) on its outer envelope surface, cooperating with the saw-tooth profile (6) in the inner race ring (4) for increasing and decreasing the grip of the thin-walled sleeve against a shaft, when inner race ring (4) and sleeve (7) are mutually displaced, a flange (10) connected to the sleeve (7) and having tightening means (11) operable to cause the displacement between sleeve (7) and inner race ring (4), rolling bodies (12) positioned between inner and outer race rings, wherein the surface of the inner race ring (4) presenting the tapering saw-tooth profile (6) has been subjected to a turning operation followed by hardening.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: August 20, 2013
    Assignee: Aktiebolaget SKF
    Inventors: Sture Östling, Franco Ollagnero
  • Patent number: 8510955
    Abstract: A process of producing an inner joint part for a constant velocity plunging joint is disclosed. The process includes providing a preformed blank, hardening the preformed blank, hard-machining first track portions, while second track portions remain unmachined. The preformed blank includes a longitudinal axis, an outer face with circumferentially distributed tracks, a central through-aperture, a first end face and a second end face opposed thereto. The tracks each comprise a first track portion having, in a cross-sectional view, a smaller track radius and a second track portion having, in a cross-sectional view, a greater cross-section.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: August 20, 2013
    Assignee: GKN Driveline Bruneck AG
    Inventors: Bruno Feichter, Carlo Faustini
  • Patent number: 8499458
    Abstract: A method for producing a rolling bearing component with a carbon gradient, at least in the region of its outer layer, wherein molten metal is sprayed onto a carrier in a spraying process, the carbon content of the metal to be sprayed on being varied during the spraying operation.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: August 6, 2013
    Assignee: Schaeffler Technologies AG & Co., KG
    Inventors: Werner Trojahn, Silke Roesch
  • Patent number: 8479396
    Abstract: A method for hardening running surfaces of roller bearing components, in particular outer bearing rings. In order to provide the edge area (functional layer) of the roller bearing components with a deep layer which is particularly hard and resistant to corrosion, the roller bearing component undergoes nitration for a long period of time at a temperature of between 450 and 650° C. for at least 25 hours. During treatment no carburizing and subsequently no quenching takes place.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: July 9, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Edgar Streit, Oskar Beer
  • Publication number: 20130170780
    Abstract: Spherical particles having diameters of 100 ?m or less are projected on a surface of a tapered roller so as to form recesses and protrusions, and abrasive particles are then projected thereon so as to remove the protrusions. The abrasive particles result from adhering 5 mass % diamond grains with an average diameter of 10 ?m on surfaces of 1 mm-diameter rubber particles. As a result, multiple recesses having circular openings of 50 ?m or less are formed on the surface of the tapered roller at intervals of 200 ?m or less. These recesses become moderate oil pools, heightening the oil film formation capability of the roller surface, and thus torque of the tapered roller bearing may be decreased.
    Type: Application
    Filed: February 26, 2013
    Publication date: July 4, 2013
    Applicant: NSK LTD.
    Inventor: NSK, Ltd.
  • 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
  • Patent number: 8381404
    Abstract: A method manufacturing of a fluid dynamic bearing includes: forming a substantially linear groove having a length corresponding to a circumferential direction width of the dynamic pressure groove formed on the inner circumferential surface of a shaft housing hole portion, along the circumferential direction of a surface orthogonal to a first processing direction along the central axis direction of a work, by a byte that performs a micro alternating drive in a second processing direction orthogonal to the first processing direction; and extending the dynamic pressure groove that extends in the first processing direction by continuously forming the substantially linear grooves in the first processing direction by displacing the relative positions of the work and the byte in the first processing direction.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: February 26, 2013
    Assignee: Alphana Technology Co., Ltd.
    Inventors: Hisayuki Aoshima, Hiroshi Iwai
  • Patent number: 8356413
    Abstract: The present invention provides a method of making a foil component of a foil bearing, where the foil component has an inner surface, an inner portion, and an outer portion. In one embodiment, and by way of example only, the method includes thermally spraying a first material onto an outer surface of a sacrificial substrate to form the foil component inner portion, where the first material includes a solid film lubricant, and the outer surface has a shape that is complementary to the inner surface of the foil component. A second material is then thermally sprayed over the inner portion to form the outer portion, and the second material includes a metal. The sacrificial substrate is then removed to expose the foil component.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: January 22, 2013
    Assignee: Honeywell International Inc.
    Inventor: Christopher M. Weyant
  • Patent number: 8302314
    Abstract: In a method for manufacturing internally and/or externally profiled rings from pipe material or solid material, machine-cutting processes and forming processes are combined with one another sequentially, parallel, or sequentially and parallel, wherein one of the forming processes is roll forming. During roll forming a counterforce is generated relative to a flow direction of the starting material so that a material flow in at least one of an axial direction and a radial direction of the starting material is controlled such that flowing material is integrated into a profile to be shaped on the ring.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: November 6, 2012
    Assignee: Technische Universität Dresden
    Inventors: Thomas Ficker, André Hardtmann, Mario Houska
  • Patent number: 8234785
    Abstract: The invention relates to a method for producing a bearing component (1), in particular a connecting rod (1), from a molded part (2), wherein the bearing component (1) includes at least one divided bearing seat (5) formed by a bearing base (3) and a bearing cover (4), and a bearing seat surface (7) coated with a bearing layer (6) of a bearing layer material is formed in the bearing seat (5) for supporting a shaft. In the method of the present invention the bearing cover (4) is separated from the molded part (2) along a separating surface (8). In accordance with the invention, a masking agent (M) is disposed perpendicularly with respect to a separating line (10) on the bearing seat surface (7) during a coating process for applying the bearing layer (6) in order to form a coating-free region, such that a recess (9) at a predetermined width (B) is produced in the bearing layer (6). The masking agent (M) is formed as an element which is separate from the bearing component (1) and is not connected thereto.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: August 7, 2012
    Assignee: ThyssenKrupp Technologies AG
    Inventor: Stefano Sergio Guerreiro
  • Patent number: 8230599
    Abstract: Disclosed herein is a method of manufacturing a hydrodynamic bearing in which a metal bearing made of sintered metal powder is internally subjected to chemical etching, to form hydrodynamic pressure grooves thereon, thus assuring a high-precision and reliable hydrodynamic bearing. The method includes: compressing metal powder that is a raw material of the bearing in a press unit, and sintering the compressed metal powder at a predetermined temperature, thus preparing a sintered bearing; removing foreign substances adhering to the sintered bearing through a deburring process, and pressing the sintered bearing into a desired shape; forming a hydrodynamic groove, configured to generate hydrodynamic pressure, on an internal surface of the shaped bearing using chemical etching; and conducting a post treatment of cleaning the bearing including the hydrodynamic grooves thereon and drying the bearing.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: July 31, 2012
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Young Tae Kim, Jin San Kim, Young Hwan Lim, Il Oung Park, Ta Kyoung Lee
  • Patent number: 8167498
    Abstract: A body part of a rotation detecting sensor of a rotation number detector which is provided on a bearing apparatus for an axle has a large diameter part formed in its upper part and a small diameter part formed in its lower part, and at the same time, a sensor fitting hole part which is formed in an outer ring of a bearing part and into which the body part of the rotation detecting sensor is inserted is so formed that an radially outer part thereof has an inner diameter substantially equal to an outer diameter of the large diameter part of the body part, and a lower part thereof has an inner diameter slightly larger than an outer diameter of the small diameter part of the body part.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: May 1, 2012
    Assignee: JTEKT Corporation
    Inventors: Yutaka Koma, Joji Miyawaki, Takumi Harada, Shigeru Inoue
  • Patent number: 8151434
    Abstract: A brake disk mounting surface is ground by bringing it into contact with an annular grinding wheel, while an inner ring having the brake disk mounting surface is rotated around its center axis, in a state where a part of the annular grinding wheel overlaps with a recess over an entire region of the annular grinding wheel in a radial direction, and in a state where a grinding surface of the annular grinding wheel is inclined with respect to the brake disk mounting surface so that a distance between the brake disk mounting surface and the annular grinding wheel grows larger in a direction toward an outer edge of the brake disk mounting surface.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: April 10, 2012
    Assignee: JTEKT Corporation
    Inventor: Takeshi Fukao
  • Patent number: 8132330
    Abstract: A method of making a bearing assembly and a bearing assembly is provided. The method includes the steps of extruding a support rail, providing a mounting surface on the support rail, mounting a bearing rail on the mounting surface and machining a bearing surface on the bearing rail. The bearing assembly includes an extruded support rail and a bearing rail. The bearing rail is of a harder material than the material of the support rail to which the bearing rail is mounted. The bearing rail further provides a machine polished linear contact.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: March 13, 2012
    Assignee: Pacific Bearing Company
    Inventor: Jonathan R. Schroeder
  • Patent number: 8127451
    Abstract: A bearing for use in a particulate-laden environment uses the particles as a lubricant between the opposed bearing surfaces, which are coated with a tungsten carbide coating that is harder than the particles.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: March 6, 2012
    Assignee: Republic Industries International
    Inventors: Robert Darst, Carl Coslow, Ray Gulley
  • Patent number: 8091239
    Abstract: A method is provided for producing a bearing ring (1) for large-size rolling bearings including at least one track (3) that is provided with a hardened peripheral layer. With the method the peripheral layer that is to be hardened is exposed to the electric field of an inductor in order to be heated and is then quenched. At least two inductors (2) are disposed above a common zone (a) of the annular track (3) that is to be hardened at the beginning of the hardening process. These inductors (2) heat the opposite peripheral layer to a hardening temperature at this location. The inductors (2) are moved in the opposite direction along the annular track in order to heat the adjacent central zones (b). Sprinklers (5) that are directed onto the heated peripheral layers are turned on following a short distance, and the peripheral layers are quenched starting from the center of the zone (a) that was heated at the beginning.
    Type: Grant
    Filed: February 11, 2006
    Date of Patent: January 10, 2012
    Assignees: Rothe Erde GmbH, EFD Induction GmbH
    Inventors: Joerg Rollmann, Wilfried Spintig, Bernd Stakemeier, Kristian Berggren
  • Patent number: 8069567
    Abstract: The invention relates to a method and a device for producing a split bearing arrangement, in which a top bearing part (6) is separated in several machining stations from a basic bearing part (5) that is monolithically joined thereto via a severing breaking process on a predefined plane of breakage (10) by applying a certain force, whereupon the two parts are joined back together by means of a screw connection comprising at least two screws. The basic bearing part (5) and the top bearing part (6) are fixed on an adapter device (1) that is conveyed from one machining station to another while the top bearing part is retained at least during some processes in the machining stations via a retractable auxiliary support (13) which is disposed on the adapter device and catches the top bearing part outside the area of the screw connection.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: December 6, 2011
    Assignee: Alfing Kessler Sondermaschinen GmbH
    Inventors: Stefan Hansch, Juergen Gross, Martin Georg Schmid, Eberhard Huegler
  • Publication number: 20110158571
    Abstract: An inner ring of a wheel bearing device has a ring mounting surface on which a pulsar ring for detecting a rotation speed of an axle is mounted and first and second inner raceway surfaces which are arranged along an axis of the axle and on which rolling elements roll. The inner ring includes a first inner ring member that has the first inner raceway surface and the ring mounting surface and a second inner ring member that has the second inner raceway surface and a portion that is spaced apart in an axial direction from the second inner raceway surface toward one side at a distance that is longer than or equal to a distance in the axial direction between the first inner raceway surface and the ring mounting surface. A diameter of the portion is smaller than a diameter of the ring mounting surface.
    Type: Application
    Filed: December 10, 2010
    Publication date: June 30, 2011
    Applicant: JTEKT CORPORATION
    Inventors: Shigeaki FURUSAWA, Yutaka KOMA, Shinichi OKUBO
  • Patent number: 7926182
    Abstract: A method for manufacturing a hydrodynamic bearing with hydrodynamic pressure generating grooves comprises steps of: step 201: providing a substrate with a first annular protrusion and a plurality of projections formed on a periphery thereof, the projections being in a side of the first annular protrusion; step 202: placing the substrate in a middle of a hollow mold, then injecting a feedstock of powder and molten binder under pressure into the mold to surround the substrate, thus forming a desired bearing preform; step 203: separating the substrate from the bearing preform by means of catalytic debinding; step 204: separating the molten binder from the bearing preform; step 205: sintering the bearing preform to thereby form the hydrodynamic bearing.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: April 19, 2011
    Assignee: Foxconn Technology Co., Ltd.
    Inventor: Chuen-Shu Hou
  • Publication number: 20110026867
    Abstract: A tapered cylinder portion, a radially extending portion, a cylindrical portion, a center backup portion, and a large diameter side curved portion are formed from an integral metallic plate.
    Type: Application
    Filed: July 26, 2010
    Publication date: February 3, 2011
    Applicant: JTEKT CORPORATION
    Inventors: Kazuki HAMADA, Hiroshi UENO, Hitoshi YANO, Kanichi KODA, Masashi SAKAGUCHI, Toshihiko SHIRAKI, Ryo OONISHI
  • Patent number: 7870674
    Abstract: An end surface 1a of sintered bearing 1 is abutted on a die 10 so that the sintered bearing 1 is mounted thereon, and a tool 40 is abutted on the other end surface 1b of the sintered bearing 1. While the sintered bearing 1 is pressed by the tool 40, high frequency vibration in an axial direction is supplied from a horn 30 to the tool 40 by operating a vibrator 20 so as to give repeated impacts to both end surfaces 1a and 1b of the sintered bearing 1, and pores of the end surfaces 1a and 1b are thereby sealed. The die 10 and the tool 40 have surfaces abutting the sintered bearing 1, and the surfaces have roughness of 0.4 s or less and hardness of HRA 60 or more, and the tool presses the sintered bearing at a pressure of 70 to 700 kPa. The high frequency vibration supplied to the tool 40 has a power of 50 to 3000 W/cm2, and it has a frequency of 10 to 50 kHz.
    Type: Grant
    Filed: August 22, 2005
    Date of Patent: January 18, 2011
    Assignee: Hitachi Powdered Metals Co., Ltd.
    Inventor: Makoto Kondo
  • Publication number: 20100290730
    Abstract: The invention refers to a bearing unit and a method for its manufacture incorporating an outer race ring (1), an inner race ring (4) having an inner envelope surface with an axially tapering saw-tooth profile (6), a thin-walled axially slotted sleeve (7), having a tapering saw-tooth profile (9) on its outer envelope surface, cooperating with the saw-tooth profile (6) in the inner race ring (4) for increasing and decreasing the grip of the thin-walled sleeve against a shaft, when inner race ring (4) and sleeve (7) are mutually displaced, a flange (10) connected to the sleeve (7) and having tightening means (11) operable to cause the displacement between sleeve (7) and inner race ring (4), rolling bodies (12) positioned between inner and outer race rings, wherein the surface of the inner race ring (4) presenting the tapering saw-tooth profile (6) has been subjected to a turning operation followed by hardening.
    Type: Application
    Filed: December 17, 2008
    Publication date: November 18, 2010
    Inventors: Sture Östling, Franco Ollagnero
  • Patent number: 7764463
    Abstract: A fluid dynamic bearing having a shaft (12) and a bearing sleeve (11) rotatably supported relative to each other. At least one of the shaft and the bearing sleeve is made of steel or stainless steel made of by weight C: 0.6˜1.20%; Si: 1.0% or less; Mn: 1.0% or less; Cr: 10.5˜18.0%; Mo: 1.0% or less; S.: 0.03% or less; and Fe. The dynamic pressure bearing surface (20) is formed by ridges (22) remaining in between multiple dynamic pressure grooves (21) formed by electrochemical machining.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: July 27, 2010
    Assignee: Minebea Co., Ltd.
    Inventors: Rikuro Obara, Hiroshi Yoshikawa
  • Publication number: 20100088897
    Abstract: A method for treating bearing components includes treating the bearing components in a tumbling-type cutting surface treatment; treating the bearing components in a tumbling-type burnishing treatment; and treating the bearing components in a tumbling-type cleaning and polishing treatment, to provide finished components.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 15, 2010
    Applicant: ROLLER BEARING COMPANY OF AMERICA, INC.
    Inventor: Alex Habibvand
  • Patent number: 7685717
    Abstract: At least a race (1c) of a blank (B) for forming a bearing raceway member is hardened by heating and is finished to predetermined precisions. Subsequently, the race (1c) is roller burnished for additional hardening. The blank (B) is formed from a steel for bearing manufacture and is subjected to the roller burnishing, thereby achieving a hardness of HRC65 or more at a surface of the race (1c), and a center-line average roughness Ra of 0.1 ?m or less at the surface of the race (1c) and achieving a hardness of HRC60 or more at the depth of at least 0.2 mm from the surface of (1c).
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: March 30, 2010
    Assignee: JTEKT Corporation
    Inventors: Masamichi Shibata, Nobuo Komeyama, Hisashi Harada
  • Publication number: 20100058593
    Abstract: To provide a method of producing an outer ring of a self-aligning bearing in which at a raceway-turning step after a heat treatment, the chipping of a turning tool and damage of a raceway can be prevented. Before the heat treatment, an annular groove 2b is formed in that portion of the raceway 2a of the outer ring 2 corresponding to lubrication holes 7, thereby avoiding a situation in which a discontinuous cutting operation occurs because of the lubrication holes 7 at the raceway-turning step after the heat treatment.
    Type: Application
    Filed: March 27, 2008
    Publication date: March 11, 2010
    Inventors: Yoshikazu Kurashita, Takehiro Adachi
  • Publication number: 20100024218
    Abstract: A method of making a bearing includes providing a bearing intermediate, which is unfinished while having an overall shape of a finished bearing product; and repeatedly impacting a surface of the bearing intermediate at one or more ultrasonic frequencies to modify characteristics of the bearing intermediate. The resulting bearing intermediate or finished bearing product includes nano-size grains at or underneath the surface.
    Type: Application
    Filed: October 13, 2009
    Publication date: February 4, 2010
    Applicant: DESIGNMECHA CO., LTD.
    Inventors: YOUNG SIK PYUN, JEONG HYEON PARK, CHANG SIK KIM, IN HO CHO
  • Patent number: 7625176
    Abstract: The present invention relates to a plain bearing between two parts movable with respect to each other, the first part having a first bearing element made from a first metal and the second part having a second bearing element made from a second metal of higher hardness. The first bearing element has a surface layer hardened by strain hardening. As a result of the invention, the wear between the parts can be reduced and their life can be substantially lengthened. The invention can be advantageously applied to cases in which the first part is a variable-setting diffuser blade and the second part is a gas turbine casing.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: December 1, 2009
    Assignee: SNECMA
    Inventors: Christelle Foucher, Veronique Christiane Giffard, Claude Marcel Mons
  • Publication number: 20090245935
    Abstract: A wheel bearing assembly includes i) a wheel hub having a hub spindle, a central hole formed the hub spindle, and female splines formed extending in the axial direction on an inner peripheral surface of the central hole, and ii) a constant velocity joint outer ring having a protruding central shaft and male splines formed extending in the axial direction on an outer peripheral surface of the central shaft. The wheel hub and the constant velocity joint outer ring are splined together by the male splines and the female splines fitting together, and a seal layer made of an anaerobic sealant that seals a gap at a meshing area where the male splines and the female splines mesh together is provided at that meshing area.
    Type: Application
    Filed: March 30, 2009
    Publication date: October 1, 2009
    Applicant: JTEKT Corporation
    Inventors: Tsuyoshi Kamikawa, Masahiro Inoue
  • Patent number: 7578724
    Abstract: A mechanical device for lapping, and a method therefore, the device including: (a) a metal workpiece having a metal working surface; (b) a contact surface, disposed generally opposite the working surface, for moving in a relative motion to the working surface; (c) abrasive particles disposed between the contact surface and the working surface, and (d) a mechanism, associated with the working surface and/or the contact surface, for applying the relative motion, and for exerting a load in a substantially normal direction to the contact surface and the working surface, the contact surface for providing an at least partially elastic interaction with the plurality of abrasive particles, wherein, associated with the contact surface is a particulate additive, and wherein, upon activation of the mechanism, the relative motion under the load causes a portion of the abrasive particles to penetrate the working surface, and wherein the relative motion under the load effects incorporation of a portion of the particulate a
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: August 25, 2009
    Assignee: Fricso Ltd.
    Inventors: Bela Shteinvas, Semyon Melamed, Kostia Mandel
  • Patent number: 7543385
    Abstract: Method for manufacturing improved contact surfaces, particularly contact surfaces in rolling bearing components such as rings or rolling bodies, is disclosed. The method subjects a surface of the rolling bearing component to a hard turning machining operation for forming by means of a hard turning tool a rolling or sliding contact surface. The hard turned surface is subjected to a finishing operation to remove the basic turning groove structure in a light machining way such that micro-pockets created in the hard turning operation remain. The hard turning tool during the hard turning machining operation is subjected to a vibration, substantially in the longitudinal direction of the tool, thereby creating in a controlled manner in the hard-turned surface a number of indentations, which are substantially arc-shaped in cross-sectional direction, prior to the finishing operation. Indentations improve lift-off and lubricating properties during later operation of the rolling bearing.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: June 9, 2009
    Assignee: Aktiebolaget SKF
    Inventors: Jacek Kaminski, Henning Wittmeyer
  • Patent number: 7480996
    Abstract: A bearing assembly is disclosed having a pair of bearing members movable relative to one another. A space is defined between the bearing members, and a relatively thin coating of a greaseless, self-lubricating material is applied to the surface of at least one of the bearing members. A grease lubricant is disposed in the space defined between the bearing members such that both the grease lubricant and the greaseless material act to substantially lower the friction-generated heat that is encountered during operation.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: January 27, 2009
    Assignee: The Boeing Company
    Inventors: John W. Davies, Robert W. Knievel, Morri Montazeri
  • Patent number: 7461455
    Abstract: A bearing apparatus includes a rotating member, a fixed member opposing the rotating member and an ink-like resin material. Opposing surfaces of the rotating member and the fixed member form a bearing part and the ink-like resin material is applied to at least one of the opposing surfaces by transfer printing.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: December 9, 2008
    Assignees: Nidec Sankyo Corporation, Toyo Drilube Co., Ltd.
    Inventors: Masato Gomyo, Shingo Suginobu, Nobutaka Nagao, Koichi Shoda, Akihito Kobayashi
  • Publication number: 20080298733
    Abstract: The invention relates to a rolling bearing having at least one heated rolling bearing ring, and to a method for mounting a rolling bearing on a frame element with the formation of a shrink fit. In this rolling bearing, an electrical heating element is applied with good thermally-conductive contact to a surface section of the heated rolling bearing ring, wherein the heat quantity which can be generated by the heating element is dimensioned such that the heated rolling bearing ring undergoes thermal expansion when heated, which permits the rolling bearing to be mounted on a frame element with the formation of a shrink fit during subsequent cooling.
    Type: Application
    Filed: December 5, 2006
    Publication date: December 4, 2008
    Applicant: SCHAEFFLER KG
    Inventor: Stefan Glueck
  • Publication number: 20080189950
    Abstract: An end surface 1a of sintered bearing 1 is abutted on a die 10 so that the sintered bearing 1 is mounted thereon, and a tool 40 is abutted on the other end surface 1b of the sintered bearing 1. While the sintered bearing 1 is pressed by the tool 40, high frequency vibration in an axial direction is supplied from a horn 30 to the tool 40 by operating a vibrator 20 so as to give repeated impacts to both end surfaces 1a and 1b of the sintered bearing 1, and pores of the end surfaces 1a and 1b are thereby sealed. The die 10 and the tool 40 have surfaces abutting the sintered bearing 1, and the surfaces have roughness of 0.4 s or less and hardness of HRA 60 or more, and the tool presses the sintered bearing at a pressure of 70 to 700 kPa. The high frequency vibration supplied to the tool 40 has a power of 50 to 3000 W/cm2, and it has a frequency of 10 to 50 kHz.
    Type: Application
    Filed: August 22, 2005
    Publication date: August 14, 2008
    Applicant: HITACHI POWDERED METALS CO., LTD.
    Inventor: Makoto Kondo
  • Patent number: 7260878
    Abstract: A ball joint includes: a ball stud having a spherical ball part and a shank part extending from the spherical ball part; a bearing cupping the spherical ball part of the ball stud; and a housing holding the bearing therein. The housing is provided with a recess in an inner surface thereof. The bearing deforms to enter into the recess of the housing in such a manner that a space is formed between the bearing and the spherical ball part.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: August 28, 2007
    Assignee: Usashi Seimitsu Kogyo Kabushiki
    Inventor: Yasuhiro Kondoh