Lubricating Patents (Class 29/898.1)
  • Patent number: 10145411
    Abstract: A thrust washer includes an annular body with an aperture therein and having a first axial face and a second axial face, an outer diameter edge and an inner diameter edge extending between the first and second axial faces. At least one of the first and second axial or conical faces includes a plurality of recessed grooves extending at least partially between the inner edge and the outer edge and defining un-recessed lands between the recessed grooves. The plurality of recessed grooves defining an average groove width and the plurality of lands defining an average land width between the grooves, wherein a ratio of the groove width to the land width is in a range of 0.2 to 2. The plurality of recessed grooves include a convex lead in surface having a lead in radius.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: December 4, 2018
    Assignee: FREUDENBERG-NOK GENERAL PARTNERSHIP
    Inventors: Saikrishna Sundararaman, Raymond L. Szparagowski, Alexander Berdichevsky
  • Patent number: 9964179
    Abstract: A chain includes two inner link plates, cylindrical bushings, each of which has opposite ends joined to the inner link plates, pins each inserted into a bushing, solid lubricant provided between the bushings and the pins, and two outer link plates that sandwich the inner link plates from outside. The ends of the pins extend through the outer link plates. The chain further includes projections, which maintain the distances between the outer surfaces of the inner link plates and the inner surfaces of the outer link plates, and absorbent members, which are arranged between the outer surfaces of the inner link plates and the inner surfaces of the outer link plates. The absorbent members confine the solid lubricant and are capable of absorbing liquid.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: May 8, 2018
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Takuya Yasu, Yusuke Nishizawa, Yuma Kanatani, Kentaro Yamamoto
  • Patent number: 9964152
    Abstract: An expendable bearing and a method for making the same including an inner race defining an inner bearing diameter, an outer race defining an outer bearing diameter, a seal attached to the outer race and positioned adjacent and in contact with the inner race, where the inner race, the outer race, and the seal define a bearing cavity, a plurality of rolling elements positioned adjacent to the inner and outer races in the bearing cavity, a dry film lubricant on a surface of at least one of the inner race, the outer race, or the plurality of rolling elements, and a powder lubricant comprising carbon nanotubes disposed in the bearing cavity.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: May 8, 2018
    Assignees: Rolls-Royce Corporation, Rolls-Royce North America Technologies, Inc.
    Inventors: Andrew D. Copeland, Craig M. Price
  • Patent number: 9845808
    Abstract: A centrifugal pump has a number of stages, each of the stages having an impeller and a diffuser. The impellers are mounted to the pump drive shaft for rotation. A bearing in at least one of the stages includes a sleeve coupled to the drive shaft for rotation. The sleeve has upper and lower ends and an outer side wall facing radially outward that is convex and spherical. A bushing is mounted in the diffuser and has a bore with an inner side wall facing radially inward that is concave and spherical. A pair of slots is formed in the inner side wall of the bushing 180 degrees apart from each other and extending axially. The slots enable the sleeve to be inserted into the bore with the sleeve axis and bore axis perpendicular to each other, then tilted 90 degrees to coincide the sleeve axis with the bore axis.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: December 19, 2017
    Assignee: Baker Hughes, a GE Company, LLC
    Inventors: David F. McManus, Jason Ives, Eduardo R. Rodriguez
  • Patent number: 9835199
    Abstract: A metal matrix self-lubricating composite and a manufacturing method therefor. The metal matrix self-lubricating composite comprises a metal matrix and a mixture layer compounded on a surface of the metal matrix, the mixed layer comprising a copper alloy and a self-lubricating material. The method for manufacturing the metal matrix self-lubricating composite comprises the following steps: a) sintering copper alloy powder on a surface of a metal matrix to form a copper alloy layer on the surface of the metal matrix; b) blade-coating or dip-coating a lubricating material on a surface of the copper alloy layer, and performing vacuumization to obtain a metal plate, and drying the metal plate; c) repeating step b) for multiple times; and d) sintering the metal plate obtained in step c) to obtain the metal matrix self-lubricating composite.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: December 5, 2017
    Assignee: ZHEJIANG CHANGSHENG SLIDING BEARINGS CO., LTD.
    Inventors: Zhihua Sun, Zhongquan Lu
  • Patent number: 9599159
    Abstract: A noise reducing apparatus of a speed reduction device for electric continuous variable valve timing (CVVT), may include the speed reduction device having an inner tooth portion formed to be faced opposing an external wheel of a ball bearing in an interior diameter surface of a housing that may be integrally formed with a sprocket and rollers arranged through a cage between an inner tooth of the inner tooth portion and the external wheel of the ball bearing, wherein a coating layer may be formed to ease impact in exterior circumference portions of the rollers.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: March 21, 2017
    Assignee: Hyundai Motor Company
    Inventors: Seungwoo Lee, Hongkil Baek, Bokyung Kim, Inwoong Lyo, Jiyoun Seo
  • Patent number: 9546597
    Abstract: A turbocharger for an internal combustion engine includes a rotating assembly having a turbine wheel disposed inside a turbine housing and a compressor wheel disposed inside a compressor cover. The turbocharger also includes a waste-gate assembly configured to selectively redirect at least a portion of the engine's post-combustion gases away from the turbine wheel. The waste-gate assembly includes a valve, a rotatable shaft connected to the valve, and a bushing fixed relative to the turbine housing and disposed concentrically around the shaft such that the shaft rotates inside the bushing for opening and closing the valve. The bushing is defined by a length, an outer surface in contact with the turbine housing, and an inner surface in contact with the shaft. The inner surface includes a plurality of longitudinal grooves configured to counteract friction between the bushing and the shaft and avoid seizure of the shaft relative to the bushing.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: January 17, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Julie Swartz, Robert Bielas, Louis P. Begin, Roman Mudel
  • Patent number: 9534651
    Abstract: One embodiment includes a damped product including a first portion, a second portion, a first cavity formed in one of the first portion or the second portion, and a frictional damping insert at least partially received in the first cavity so that the first portion and the second portion completely enclose the frictional damping insert and so that vibration of the product is damped by the insert.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: January 3, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Michael D. Hanna, Mohan Sundar, James G. Schroth, Thomas C. Zebehazy
  • Publication number: 20150115071
    Abstract: There is provided an oil supply nozzle including a micro-needle, and a needle holder to which the micro-needle is inserted and fixed with an adhesive, wherein the needle holder includes a coupling hole formed to allow the needle holder to be inserted into an oil injection apparatus, and an injection hole connected to the coupling hole and having the micro-needle inserted thereinto, and the insertion hole and the coupling hole have a guide hole at a point of connection therebetween.
    Type: Application
    Filed: February 6, 2014
    Publication date: April 30, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Min Chul Go, Chun Mo Sung
  • Patent number: 8955224
    Abstract: An aspect of the present disclosure relates to a fluid bearing and a method of adjusting the load carrying capacity of a fluid bearing. The fluid bearing may include a bore defined in the fluid bearing and a rotatable bearing including a rotatable bearing surface. Lubricating fluid in the bore may be contacted with at least a portion of the rotatable bearing surface, wherein an effective bearing surface area is provided where the lubricating fluid contacts the rotatable bearing surface. The effective bearing surface area may be altered by either increasing or reducing the area of the rotatable bearing surface which is contacted by the lubricating fluid.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: February 17, 2015
    Assignee: Southwest Research Institute
    Inventor: Charles E. Roberts, Jr.
  • Patent number: 8709532
    Abstract: In a magnetic disk having a magnetic layer, a protection layer, and a lubrication layer formed on a substrate in this order, a surface free energy ?S of a surface of the magnetic disk derived by an extended Fowkes equation is greater than 0 and no greater than 24 mN/m. ?Sd (dispersion force component of surface free energy) forming the surface free energy ?S is greater than 0 and no greater than 17 mN/m, ?Sp (dipole component of surface free energy) forming the surface free energy ?S is greater than 0 and no greater than 1 mN/m, and ?Sh (hydrogen bonding force component of surface free energy) forming the surface free energy ?S is greater than 0 and no greater than 6 mN/m.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: April 29, 2014
    Assignee: WD Media (Singapore) Pte. Ltd.
    Inventor: Masafumi Ishiyama
  • Patent number: 8567067
    Abstract: A method of manufacturing a bearing mechanism of a motor includes steps a)-e). In step a), a bearing assembly is assembled. In step b), an upper seal gap between an upper thrust portion and an upper hub annular portion is arranged to face downward to increase the width of a gap between an outer tubular portion and a flange portion, or a lower seal gap between the outer tubular portion and a lower hub annular portion is arranged to face downward to increase the width of a gap between the upper thrust portion and the flange portion. In step c), pressure in all gaps is reduced. In step d), lubricating oil is injected into the upper or lower seal gap which faces upward, and a predetermined time or longer is allowed to pass. In step e), pressure is returned to atmospheric pressure.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: October 29, 2013
    Assignee: Nidec Corporation
    Inventors: Katsuki Yamaguchi, Shigeki Horiki, Yoshitsugu Hideshima, Akio Tatsumi, Akinobu Sumiji, Takehito Tamaoka, Kazushi Miura, Mitsuhiro Takemoto
  • 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: 8397384
    Abstract: A method for attaching a bearing on a turbomachine including a stator and a rotor, the bearing including: a first portion attached on the stator of the turbomachine by a plurality of screws and nuts, a second portion attached on the rotor, rotationally movable in one given rotation direction, and a rolling bearing provided between the first and second portions of the bearing is disclosed. The method provides using screws having a screwing rotation direction contrary to the rotation direction of the rotor.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: March 19, 2013
    Assignee: SNECMA
    Inventors: Manuel Claude Bertrand Girard, Jerome Tribouiller
  • Patent number: 8365413
    Abstract: In an apparatus for manufacturing a fluid dynamic bearing, a housing portion defines a first work area. A vacuum pump discharges air in the first work area. A lubricant discharge device is arranged in the first work area, and discharges a lubricant into an inlet of a reservoir for storing the lubricant of the fluid dynamic bearing. At least one aperture is provided in the housing portion. A first door closes the aperture and a second door closes the aperture. Between the first door and the second door, when both have closed the aperture, a second work area is formed where the fluid dynamic bearing is placed.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: February 5, 2013
    Assignee: Alphana Technology Co., Ltd.
    Inventor: Hiroki Yamazaki
  • Patent number: 8308368
    Abstract: A self-lubricating track roller and a method of making the self-lubricating track roller are disclosed. First, an inner ring is provided having a radially outwardly facing surface. A parting agent is applied onto the radially outwardly facing surface. Next, a self-lubricating material is applied over the radially outwardly facing surface. Then, an outer ring is formed around the self-lubricating material such that a radially inwardly facing surface of the outer ring is bonded to the self-lubricating material. A resilient tire is bonded onto the radially outwardly facing surface of the outer ring. In the resulting track roller, the radially outwardly facing surface of the inner ring has a surface profile that corresponds to a mating surface profile of the self-lubricating material that is bonded to the radially inwardly facing surface of the outer ring.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: November 13, 2012
    Assignee: Rexnord Industries, LLC
    Inventors: David W. Blair, Dennis E. Bozych
  • 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: 8181348
    Abstract: In one example, a fluid dynamic bearing motor having a shield member is provided. In one example, the method includes disposing a first member and a second member for relative rotation about an axis of rotation. An annular shield member is attached to the first member, the shield member disposed adjacent a fluid reservoir for containing a bearing fluid. The reservoir is filled through an aperture (e.g., a fill hole) in the shield member. Thereafter, the aperture is at least partially sealed. The aperture may be hermetically sealed via one or more laser pulses. In other examples, a two piece shield is provided for shielding a reservoir without a fill hole.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: May 22, 2012
    Assignee: Seagate Technology LLC
    Inventors: Troy M. Herndon, James S. Lee, Jeffry A. Leblanc, Robert A. Nottingham, Norbert S. Parsoneault, Thaveesinn Vasavakul, James S. Bowdoin, Christopher M. Woldemar, Jerry J. Weingord
  • Publication number: 20120093574
    Abstract: Embodiments of the invention are directed to an upper ball joint assembly for connecting an upper axle housing to a steering knuckle of a vehicle. In one embodiment, the upper ball joint assembly comprises a plurality of components including a tapered ball joint pin (or stud), a ball joint cup and a threaded cap configured to assemble together into an upper ball joint assembly. In an assembled configuration, a proximal, or head component, of the ball joint pin may be housed within one or more chambers (or tiers) of the ball joint cup. The cap may reversibly engage with the ball joint cup to complete the assembly. The ball joint assembly may have a hardness characteristic of between forty (40) and one-hundred (100) Rockwell.
    Type: Application
    Filed: October 15, 2010
    Publication date: April 19, 2012
    Inventor: Sage Carli
  • 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
  • Publication number: 20110194791
    Abstract: A pull-out guide for furniture includes a guide rail configured to be mounted on a furniture body and at least one sliding rail displaceably mounted via rolling elements on the guide rail. The rolling elements are held in a rolling element cage, which cage includes a lubricant-containing material.
    Type: Application
    Filed: October 16, 2009
    Publication date: August 11, 2011
    Applicant: PAUL HETTICH GMBH & CO. KG
    Inventors: Peter Jahrling, Andreas Hoffmann
  • Patent number: 7987599
    Abstract: An exemplary method for limiting movement of an outer race of a bearing cartridge includes positioning the bearing cartridge in a substantially cylindrical bore having a longitudinal axis, an inner diameter exceeding an outer diameter of the outer race, a proximate end and a distal end; limiting axial movement of the outer race at the distal end of the cylindrical bore with a counterbore substantially coaxial to the cylindrical bore and having an inner diameter less than the outer diameter of the outer race; limiting axial movement of the outer race at the proximate end of the cylindrical bore with a plate positioned substantially orthogonal to the longitudinal axis; and limiting rotation of the outer race with a pin positioned in a pin opening accessible via a lubricant drain. Various exemplary bearing cartridges, housings, assemblies, etc., are also disclosed.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: August 2, 2011
    Assignee: Honeywell International Inc.
    Inventor: Peter Mavrosakis
  • Patent number: 7954241
    Abstract: The present invention discloses a self-lubricating bearing, which is a hollow cylindrical body with an axial hole in its center, exhibiting a structure formed by sintering a multiple of spherical alloys particles under microscopy. The self-lubricating bearing has a multiple of pores to receive lubricating oil. Further, the present invention provides a manufacturing process for making self-lubricating bearings.
    Type: Grant
    Filed: July 3, 2007
    Date of Patent: June 7, 2011
    Inventor: Yun-Ju Chen
  • 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
  • Patent number: 7921565
    Abstract: A working fluid injection apparatus has an upper chamber that stores a working fluid and a lower chamber that removably receives a bearing unit having a housing and a shaft that is inserted in the housing to form between the shaft and the housing a gap into which the working fluid is to be injected. A partition divides the upper chamber and the lower chamber into top and bottom parts, respectively. A first exhaust system brings the inside of the upper chamber to a decompressed state. A second exhaust system brings the inside of the lower chamber to a decompressed state. A valve unit opens and closes an internal cavity of the lower chamber relative to an external environment. A tapered hole is formed in the partition and communicates the upper and lower chambers to one another. A tapered shaft is inserted into the tapered hole from the upper chamber. A shaft drive unit moves the tapered shaft in the axial direction in the tapered hole.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: April 12, 2011
    Assignee: Seiko Instruments Inc.
    Inventors: Junji Teraya, Yutaka Makishima, Naoki Nemoto
  • Patent number: 7905019
    Abstract: A working fluid injection apparatus for injecting a working fluid into a gap between a housing and a shaft of a bearing unit of a fluid dynamic pressure bearing. The apparatus has an adapter configured to support the bearing unit in a state in which an end portion of the shaft protrudes from an open portion of the housing. A cover member has an upper opening, a lower opening, and a tapered inner surface with a radial dimension that increases gradually from the lower opening to the upper opening. The cover member is configured to be mounted in contact with an upper surface of the housing when the bearing unit is supported by the adapter so that the lower opening of the cover member surrounds the open portion of the housing and so that the protruding end portion of the shaft and the tapered inner surface of the cover member form a reservoir portion that communicates with the open portion of the housing and that is configured to store a working fluid.
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: March 15, 2011
    Assignee: Seiko Instruments Inc.
    Inventors: Junji Teraya, Tetsuya Nagata
  • Publication number: 20110052389
    Abstract: A method for producing a lubricant feed in an axial bearing, wherein the lubricant feed is designed as a channel guiding lubricant from a lubricant pocket of the axial bearing, includes the following steps: preparing an initial axial bearing mold, stamping a groove in the area of the initial mold in which the channel is planned; embossing and putting through material on at least one or both sides of the groove along at least one segment of the groove; stamping the material on the side of the groove toward the groove so that the material and the groove form the channel.
    Type: Application
    Filed: September 16, 2008
    Publication date: March 3, 2011
    Applicant: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Dirk Frankenstein, Dag Hauschild, Johann Hauser, Jochen Held, Stefan Nowack, Konrad Viessmann
  • Patent number: 7882639
    Abstract: An undersize repair region of a gas turbine engine stationary shroud is repaired with a sufficient mass of a repair material. The repair region includes a protruding portion that is undersized, and the repair includes machining of the protruding portion, grooving the resulting rub surface, inserting a replacement element, applying a brazing repair material, and brazing the article to form a repaired article. The repair material preferably includes a first fraction of a first powder of a first alloy component, and a second fraction of a second powder of a second alloy component. The first alloy component and the second alloy component have different solidus temperatures. The repair material is placed in the repair region. The repair material and the repair region are heated to melt the repair material but not the repair region, and thereafter the repair material and the repair region are cooled to solidify the repair material.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: February 8, 2011
    Assignee: General Electric Company
    Inventor: John Matthew Powers
  • 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: 20100275571
    Abstract: The oil-free chain is obtained by connecting a pair of inner link plates which are connected by oil-impregnated bushings and a pair of outer link plates, which are connected by pins inserted into adjacent oil-impregnated bushings of adjacent inner link plates alternately. The oil-impregnated bushing is obtained by impregnating a bushing made of a metal sintered body with perfluoropolyether having a kinematic viscosity at 40° C. equal to or higher than 350 mm2/s. The bushing is impregnated with perfluoropolyether having a kinematic viscosity corresponding to the operating temperature of the oil-free chain.
    Type: Application
    Filed: October 23, 2008
    Publication date: November 4, 2010
    Applicant: Tsubakimoto Chain Co.
    Inventors: Takeshi Kondo, Toshihiko Takashima, Ikutaro Nakagawa, Takahisa Andoh, Masahide Komeda
  • Publication number: 20100220950
    Abstract: In a state in which a first ball 103 is assembled in between a first inner peripheral raceway surface of an outer ring 105 and an outer peripheral raceway surface of a shaft 101, and a second ball 104 is placed in between a second inner peripheral raceway surface of the outer ring 105 and an outer peripheral surface of the shaft 101, a first distance “a” from a plane “q” generally perpendicular to a central axis “p” of the shaft 101 to the second ball 104 and a second distance “b” from the plane “q” to a stepped portion 107 of the shaft 101 are measured. Then, the size in the axial direction of the inner ring 102 is adjusted on the basis of a difference between the first distance “a” and the second distance “b”.
    Type: Application
    Filed: January 18, 2007
    Publication date: September 2, 2010
    Applicant: JTEKT CORPORATION
    Inventors: Hiroyuki Miura, Hiroshi Yoshikawa, Yasuhiro Ohtani, Eiji Murata, Daisaku Tomita
  • Patent number: 7766727
    Abstract: A tribological system including: a tribological workpiece having a working surface adapted for moving relative to a counter-surface in a presence of a lubricant, in a load-bearing environment, the working surface for disposing generally opposite the counter-surface, the working surface having: (i) a metal surface layer; (ii) a plurality of organic particles incorporated in the metal surface layer, and (iii) a plurality of inorganic particles incorporated in the working surface, the inorganic particles having a Mohs hardness of at least 8.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: August 3, 2010
    Assignee: Fricso Ltd
    Inventors: Kostia Mandel, Boris Shamshidov, Bela Shteinvas, Semyon Melamed, Sergei Stefanidin
  • Patent number: 7735227
    Abstract: A method for forming a lubricating layer, comprising the steps of a process for inserting a bearing, which has a tubular-shaped retainer holding a plurality of rollers and inserted in an outer ring, in a forming die having an inner diameter greater than an outer diameter of the outer ring of the bearing; a process for feeding a fluid lubricant including a thermoplastic resin into the forming die; a process for reducing pressure in the forming die with the fluid lubricant fed therein to remove air bubbles included in the fluid lubricant; a process for pressing a cylindrical elastic solid, which has an outer shape greater than a minimum inner diameter of the retainer, into an inscribed circle in which the plurality of rollers are inscribed; and a process for heating and setting the thermoplastic resin to form a lubricating layer.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: June 15, 2010
    Assignee: Nippon Thompson Co., Ltd.
    Inventor: Shouji Nagao
  • Patent number: 7676928
    Abstract: Oil which will serve as a lubricating fluid of a fluid dynamic pressure bearing is degassed in a first environment under a first pressure which is lower than atmospheric pressure. First and second members of the bearing are place in a second environment under a pressure lower than atmospheric pressure and higher than the pressure in the first environment. The degassed oil is supplied to the gap between bearing surfaces of the first and second members while the first and second members are in the second environment under pressure lower than atmospheric pressure and higher than the pressure in the first environment. Subsequently the pressure in the second environment is increased to force the oil into the gap between the bearing surfaces of the first and second members of the hydrodynamic fluid.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: March 16, 2010
    Assignee: Nidec Corporation
    Inventors: Isao Misu, Masaaki Uchiyama
  • Patent number: 7594332
    Abstract: A cylindrical bearing member, which can hold lubricating oil in blind grooves as oil reservoirs for a long period of time to exhibit a lubricating function sufficiently, the blind grooves being efficiently mass-produced on the inside of the cylindrical member at low cost. The cylindrical bearing member has an inner circumferential surface having a plurality of blind grooves and is formed as a hollow open-ended cylindrical member with a bottom from a circular column-shaped crude material or blank. The blank includes a tapered inner circumferential surface at its open end. A groove forming die pin including groove forming protrusions is pushed from the open end towards the bottom to obtain a cylindrical member in which a plurality of grooves are formed on the inner surface.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: September 29, 2009
    Assignee: Tsubakimoto Chain Co.
    Inventor: Hirofumi Miki
  • 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: 7566293
    Abstract: A device for recirculating oil from the end face of the barrel and the peripheral surface of the roll neck of rolling mill rolls. A sealing race arranged between the bearing elements and the end face of the barrel is mounted on the roll neck. A first conical ring body has a conical outer surface and a cylindrical inner surface that is seated on the outer surface of the sealing race and is sealed from the race, whereby inclination of the conical outer surface towards the end face runs towards the roll axis. A second conical ring body is rigidly mounted in the bearing housing and has a conical inner surface, which conical inner surface is arranged some distance opposite the conical surface of the first conical ring body, such that the two conical surfaces form a hydraulic pump gap that conveys oil away from the end face.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: July 28, 2009
    Assignee: SMS Demag AG
    Inventors: Winfried Leisten, Wolfgang Denker
  • Publication number: 20090154990
    Abstract: The light articulation ball-joint comprises a metal inner ring and a metal outer ring, provided respectively with a spherical outer surface and a spherical inner surface. The ball-joint also comprises a first contact layer, applied to the spherical surface of one of the rings, and a second contact layer, applied to the spherical surface of the other ring. According to the invention, the first contact layer has a hardness which is less than the hardness of the second contact layer and a thickness which is greater than the thickness of the second contact layer, the first contact layer further being adapted to release particles of solid lubricant by friction with the second contact layer.
    Type: Application
    Filed: October 8, 2008
    Publication date: June 18, 2009
    Applicant: SKF Aerospace France
    Inventor: Benjamin Julliere
  • Patent number: 7500311
    Abstract: A bearing device includes: an inner ring member through which a shaft is passed and which is supported rotatably about an axis of the shaft and includes an inner ring raceway surface; an outer ring member arranged concentrically with the inner ring member and including an outer ring raceway surface; a plurality of rollers arranged rollably between the inner ring raceway surface and the outer ring raceway surface; a lubricating path through which lubricant is supplied to at least one of the inner ring raceway surface and the outer ring raceway surface; and a lubricating device which supplies the lubricant to the lubricating path according to rotating speed of the inner ring member about the axis.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: March 10, 2009
    Assignee: Jtekt Corporation
    Inventor: Toshiaki Shimomura
  • 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
  • Publication number: 20090016656
    Abstract: The present invention provides a self-lubricating track roller and a method of making the self-lubricating track roller. First, an inner ring is provided having a radially outwardly facing surface. A parting agent is applied onto the radially outwardly facing surface. Next, a self-lubricating material is applied over the radially outwardly facing surface. Then, an outer ring is formed around the self-lubricating material such that a radially inwardly facing surface of the outer ring is bonded to the self-lubricating material. A resilient tire is bonded onto the radially outwardly facing surface of the outer ring. In the resulting track roller, the radially outwardly facing surface of the inner ring has a surface profile that corresponds to a mating surface profile of the the self-lubricating material that is bonded to the radially inwardly facing surface of the outer ring.
    Type: Application
    Filed: July 11, 2008
    Publication date: January 15, 2009
    Inventors: David W. Blair, Dennis E. Bozych
  • Patent number: 7472538
    Abstract: A method or producing rollers and sleeves for chains, particularly for roller chains or sleeve-type chains. The rollers and sleeves are of cylindrical form and they are deep-drawn from a sheet metal material. The drawn components can remain attached to the sheet metal for convenience in transporting them and later separated from the sheet as they are needed. Alternatively, the drawn components can be separated from the sheet metal material and can be pressed into the openings that remain in the sheet metal, again for convenient transportation.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: January 6, 2009
    Assignee: Schaeffler KG
    Inventors: Joachim Spörrer, Olaf Donath, Georg Backert, Michael Dotterweich, Alexander Fichtner, German Lang
  • Publication number: 20080310781
    Abstract: A method for lubricating a rolling element bearing by an ultra low viscosity volatile fluid comprises injecting a liquefied fluid flow into the bearing, lubricating rolling contacts between the rings and the rolling elements of the bearing by the liquefied fluid, providing a flow restriction for the liquefied fluid so as to maintain at least part of the fluid at a pressure which is above the evaporation pressure which is defined by evaporation of the fluid at the temperature or temperatures which prevail(s) in the bearing.
    Type: Application
    Filed: May 23, 2006
    Publication date: December 18, 2008
    Applicant: AB SKF
    Inventors: Guillermo Enrique Morales Espejel, Hans Wallin, Goran Lindsten
  • 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: 20080209732
    Abstract: Oil which will serve as a lubricating fluid of a fluid dynamic pressure bearing is degassed in a first environment under a first pressure which is lower than atmospheric pressure. First and second members of the bearing are place in a second environment under a pressure lower than atmospheric pressure and higher than the pressure in the first environment. The degassed oil is supplied to the gap between bearing surfaces of the first and second members while the first and second members are in the second environment under pressure lower than atmospheric pressure and higher than the pressure in the first environment. Subsequently the pressure in the second environment is increased to force the oil into the gap between the bearing surfaces of the first and second members of the hydrodynamic fluid.
    Type: Application
    Filed: December 12, 2007
    Publication date: September 4, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Isao Misu, Masaaki Uchiyama
  • Publication number: 20080196249
    Abstract: The invention relates to a method for producing a bearing shell comprising two circumferentially extending oil grooves. According to said method, a rectangular blank is cut from a strip stock, and said blank is shaped into the bearing shell. The oil grooves are introduced into the blank by die-cutting two cavities which extend from the narrow sides in the longitudinal direction of the blank at a maximum angular range of 60°.
    Type: Application
    Filed: July 12, 2006
    Publication date: August 21, 2008
    Inventor: Martin Klein
  • Patent number: 7343682
    Abstract: Fluid-dynamic-pressure bearing manufacturing method for more efficient and fail-safe degassing of bearing oil. Method makes it possible to prevent the generation of air bubbles in the course of an oil-charging operation that amounts to a step following degassing, and to single out the causative source of air bubbles when their generation has been detected. At the same time oil that is under a reduced-pressure environment within an oil-storing vacuum chamber is vacuum-degassed, immersed within the oil a stirrer for agitating and degassing the oil is rotated by indirect drive means, and the oil after having been degassed is supplied to a vacuum chamber where a fluid-dynamic-pressure bearing unit is retained—which has been pumped down to a pressure below the pressure within the oil-storing vacuum chamber—and is charged into the bearing clearances by raising the internal pressure of the bearing-retaining vacuum chamber.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: March 18, 2008
    Assignee: Nidec Corporation
    Inventors: Shigeharu Sumi, Jyoichi Hiroshi, Hironori Ando
  • Patent number: 7340834
    Abstract: A method of lubricating a wave bearing comprising application of an oil comprising a perfluoropolyether, derivatized perfluoropolyether, fluorosilicone, polychlorotrifluoroether, or polyphenyl ether, wherein the oil is capable of sustaining temperatures greater than 121° C., and at an operating speed of up to 1.4 million DN without decomposition.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: March 11, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Jon L. Howell, Gregory Alan Bell
  • Patent number: 7275319
    Abstract: A rolling element bearing comprises an inner ring and an outer ring which are each provided with a raceway, and a series of rolling elements which are in contact with the raceways of each ring. A lubricant film is provided in the contacts between the rolling elements and the raceways, which film forms a lubricant meniscus at the inlet side of each contact. In the bearing starved lubrication conditions prevail. The surface of each rolling element has minute recesses filled with a lubricant quantity, said recesses being flattened in the contact area defined by the contact between the rolling elements and the rings and thereby releasing lubricant at the inlet side of each contact resulting in a displacement of the meniscus further away from said contact. This meniscus displacement results in an increased lubricant film thickness in each contact area, thus improving the lubricating conditions in the bearing.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: October 2, 2007
    Assignee: SKF Engineering & Research Centre B.V.
    Inventors: Pieter Martin Lugt, Eusthatios Ioannides, Ingrid Victoria Wikstrom, John Howard Tripp, Marie-Laure Dumont, Antonio Gabelli, Benoit Clement Jacod
  • Patent number: 7246440
    Abstract: A spindle motor is formed so as to support a pivot of a rotor by a pair of open bearings. The open bearings thus constructed will be less expensive and simple structures, so that a manufacturing cost thereof is reduced compared to a conventional spindle motor using a pair of ball bearings with shields. Accordingly, a low-cost spindle motor can be provided.
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: July 24, 2007
    Assignee: Minebea Co., Ltd.
    Inventors: Rikuro Obara, Kenji Fukunaga