Radial And Thrust Patents (Class 384/107)
  • Patent number: 10415573
    Abstract: A sintered metal bearing is formed of a porous body formed through sintering of a compact obtained through compression molding of raw-material power. The sintered metal bearing includes a dynamic pressure generating portion formed on an inner peripheral surface, the dynamic pressure generating portion including dynamic pressure generating groove array regions formed continuously to each other in an axial direction of the sintered metal bearing. The dynamic pressure generating groove array regions each include a plurality of dynamic pressure generating grooves arrayed so as to be inclined with respect to a circumferential direction of the sintered metal bearing. An axial dimension of the sintered metal bearing is set to 6 mm or less, and a density ratio of the sintered metal bearing is set to 80% or more and 95% or less.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: September 17, 2019
    Assignee: NTN CORPORATION
    Inventor: Shinji Komatsubara
  • Patent number: 10371200
    Abstract: A bearing assembly is for movably coupling first and second members, one being movable relative to the other. A plain bearing section includes an inner ring having a bore for receiving the first member and an outer cylindrical bearing surface. An outer ring is disposed about the inner ring and has an inner cylindrical bearing surface disposed against the inner ring bearing surface, one bearing surface sliding against the other when the movable member displaces about a first axis. The two rings engage to prevent relative displacement between the rings when the movable member displaces about a second axis. An elastomeric bearing section is disposed about the plain bearing section, is connected with the second member and is formed such that at least a portion of the elastomeric bearing section flexes when the movable member angularly displaces about the second axis.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: August 6, 2019
    Assignee: Aktiebolaget SKF
    Inventors: Daniel L Riedl, Lester John Temple James, Michael Brett Colton, William Andrew Curry
  • Patent number: 10312767
    Abstract: A washer member 22a and a seal member 41a are disposed in a mutually non-contacting state in the axial direction. A rotary shaft 11 has an annular groove 11a in the outer circumferential face. A minimum diameter part 11a3 of the annular groove 11a is disposed between the uppermost surface of the washer member 22a and the lowermost surface of the seal member 41a. The upper end of the annular groove 11a is disposed axially below the uppermost surface of the seal member 41a. The outer surface of the seal member 41a and the outer circumferential face of the rotary shaft 11 that faces the seal member 41a in the radial direction are subjected to oil-repellent treatment.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: June 4, 2019
    Assignee: Tokyo Parts Industrial Co., Ltd.
    Inventor: Masahiro Nishidate
  • Patent number: 10280972
    Abstract: A groove-type dynamic pressure gas radial bearing, comprises a bearing outer sleeve and a bearing inner sleeve, the outer circumferential face and the two end faces of the bearing inner sleeve are respectively provided with regular groove-type patterns, and the groove-type pattern in one end face is in mirror symmetry with the groove-type pattern in the other end face, and the axial contour lines of the groove-type patterns in the outer circumferential face and the radial contour lines of the groove-type patterns in the left and right end faces are in one-to-one correspondence and are connected with each other. The groove-type dynamic pressure gas radial bearing provided by the invention can achieve a load capacity of 1-3 kg and a limit rotating speed of 200,000 rpm to 450,000 rpm, it can realize the application of groove-type dynamic pressure gas radial bearings in ultra high-speed areas.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: May 7, 2019
    Inventor: Lifeng Luo
  • Patent number: 10250099
    Abstract: An electric motor includes a frame, a sleeve, a stator and a rotor. The frame includes a frame housing having a cylindrical shape whose one end is open. The sleeve has a cylindrical shape and fitted in the frame housing. The stator is attached to an outer peripheral part of the frame housing. The rotor includes a rotating shaft that is rotatably and pivotally supported by the sleeve, and a magnet that is disposed opposite to the stator. One end of the rotating shaft is fixed. The rotating shaft has a columnar shape. Oil is provided to a gap between rotating shaft and the sleeve.
    Type: Grant
    Filed: October 12, 2018
    Date of Patent: April 2, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Tsuyoshi Kurita
  • Patent number: 10250097
    Abstract: A static pressure seal-equipped motor in which front and rear gaps are sealed by first and second static pressure seal portions disposed at first and second axial end portions of a motor rotating shaft protruding toward front and rear. Sealing gas supplied to sealing gaps of the first and second static pressure seal portions is caused to diverge and flow to chemical liquid atmospheres and a motor chamber or an encoder chamber into the chemical liquid atmospheres, and also prevent entry of chemical liquid-containing gas from the chemical liquid atmospheres into the motor chamber or encoder chamber.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: April 2, 2019
    Assignee: Harmonic Drive Systems Inc.
    Inventors: Toshiki Maruyama, Kazumasa Furuta
  • Patent number: 10240671
    Abstract: A journal pin may comprise an internal bore formed along an axis of rotation of the journal pin, a recessed wall of the internal bore having a diameter greater than the diameter of the internal bore, the internal bore extending completely through the journal pin, and a collar coupled to the journal pin, wherein the collar comprises a second recessed wall; and a carrier press fit onto the collar. The journal pin may comprise an undercut radially outward from the internal bore and radially inward from an outer diameter of the journal pin.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: March 26, 2019
    Assignee: United Technologies Corporation
    Inventor: Marc J. Muldoon
  • Patent number: 10215230
    Abstract: Certain exemplary embodiments can provide a system, machine, device, manufacture, circuit, composition of matter, and/or user interface adapted for and/or resulting from, and/or a method and/or machine-readable medium comprising machine-implementable instructions for, activities that can comprise and/or relate to, positioning a rotating shaft within a machine via an externally-pressured gas bearing system.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: February 26, 2019
    Assignee: Radiant Physics Inc.
    Inventors: Victor Iannello, Christopher Sortore
  • Patent number: 10199065
    Abstract: A fluid bearing apparatus according to a preferred embodiment of the present invention includes a shaft arranged to extend along a central axis extending in a vertical direction; a rotating portion arranged opposite to an outer circumferential surface of the shaft, and arranged to be capable of rotating about the central axis with respect to the shaft; a lubricating oil arranged in a gap between the rotating portion and each of upper and lower outer circumferential surfaces of the shaft; a first groove defined in at least one of a middle outer circumferential surface of the shaft and a portion of an inner circumferential surface of the rotating portion, the portion being opposite to the middle outer circumferential surface, the first groove being arranged to extend along a circumferential direction; a plurality of second grooves each of which is defined in an upper surface of the rotating portion; and a plurality of communicating holes each of which is defined in the rotating portion, and is in communication
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: February 5, 2019
    Assignee: NIDEC CORPORATION
    Inventor: Shingo Suginobu
  • Patent number: 10119572
    Abstract: A magnetic bearing assembly for a rotary machine, having a rotor circuit and a stator magnetic circuit secured to a stationary support element having at least one body of ferromagnetic material and at least one coil, both being fitted in a protective annular housing leaving uncovered a surface of revolution of said ferromagnetic body and a surface of revolution of said one coil facing a surface of revolution of the rotor circuit. The bearing assembly comprises at least one row of blades secured on the rotor circuit.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: November 6, 2018
    Assignee: NUOVO PIGNONE SRL
    Inventors: Andrea Massini, Luciano Mei, Manuele Bigi
  • Patent number: 10036279
    Abstract: A bearing including a bearing pad and a housing is provided. The bearing pad has a thrust face for supporting a vibration along an axial direction of the bearing. Additionally, the housing is formed integrally using an additive manufacturing process and is attached to or formed integrally with the bearing pad. The housing defines a working gas delivery system for providing a flow of pressurized working gas to the thrust face of the bearing pad and a fluid damper cavity. The fluid damper cavity provides a dampening of the axial vibration supported by the thrust face of the bearing pad along the axial direction.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: July 31, 2018
    Assignee: General Electric Company
    Inventors: Bugra Han Ertas, Joshua Tyler Mook, Jason Joseph Bellardi
  • Patent number: 9970481
    Abstract: Rotary bell cup atomizing apparatus driven by a turbine mounted on a rotatable motor shaft supported within an air bearing assembly is provided. The air bearing assembly includes a cylindrical main air bearing supporting the motor shaft, a proximal, annular, disk-shaped thrust bearing and a distal, annular, disk-shaped thrust bearing supporting the turbine, and including vibration-damping “O”-rings positioned adjacent the bearings. In operation, air supplied to the apparatus drives the turbine and supports the turbine and motor shaft such that all rotating surfaces of the atomizing apparatus are supported in air, and universal, 3-dimensional vibration damping, both axial and radial, of all rotating components is provided.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: May 15, 2018
    Assignee: EFC Systems, Inc.
    Inventors: Gunnar van der Steur, Joseph Cichocki
  • Patent number: 9920830
    Abstract: A planetary gearbox includes a gearbox housing, a sunwheel rotatable in the housing about a central gearbox axis and having outer teeth, a ringwheel arranged concentrically to the central gearbox axis within the housing and having inner teeth, a planet gear carrier rotatable in the gearbox housing about the central gearbox axis, and a plurality of planet gears mounted on the planet gear carrier for rotation about corresponding planetary gear pins and having outer teeth meshing with the inner teeth on the ringwheel and the outer teeth of the sunwheel. At least one segmented radial sliding bearing supports the planet gear carrier on the gearbox housing and includes a plurality of circumferentially spaced-apart radial sliding bearing segments positioned radially outside the planetary gear pins so that the planet gear carrier is supported by the radial sliding bearing at a position located radially outside the planetary gear pins.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: March 20, 2018
    Assignee: FLENDER GMBH
    Inventors: Arno Klein-Hitpass, Joachim Rohde, Boris Trogrlic
  • Patent number: 9916855
    Abstract: A bearing portion includes an upper dynamic pressure portion, a lower dynamic pressure portion, and an intra-bearing space defined between a lower surface of a fluid in the upper dynamic pressure portion and an upper surface of a fluid in the lower dynamic pressure portion, and not including the fluid. An airway defined in a shaft includes an inner opening arranged to be in communication with the intra-bearing space, and an outer opening arranged to be in communication with an extra-bearing space. Each of the inner and outer openings is defined in a side surface of the shaft. The extra-bearing space and the intra-bearing space are arranged to be in communication with each other through the airway. The airway is arranged to extend substantially in a straight line or lines, is angled with respect to a central axis, and has no other openings than the inner and outer openings. This contributes to preventing a gas inside of a housing from leaking out of the housing through the airway.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: March 13, 2018
    Assignee: NIDEC CORPORATION
    Inventors: Takeyuki Shuto, Toshinari Takeuchi
  • Patent number: 9765816
    Abstract: A bearing assembly may include a first bearing element defining a first bearing surface and a second bearing element defining a second bearing surface. One of the first and second bearing elements may have a fluid channel with an inlet for receiving a bearing fluid and at least one outlet in the bearing surface of the one of the first and second bearing elements. The first bearing element may be configured for rotation at a design rate of rotation relative to the second bearing element with the first bearing surface facing the second bearing surface. The first bearing element may apply a force directed from the first bearing surface toward the second bearing surface during rotation at a reduced rate of rotation less than the design rate of rotation.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: September 19, 2017
    Assignee: The Boeing Company
    Inventor: Bryan Sydnor
  • Patent number: 9765810
    Abstract: Provided is a technique whereby a DLC film having a desired surface roughness and a desired film hardness can be easily formed within a short period of time while preventing cost increase so that a large quantity of boll joints, which are less expensive and yet have stable sliding characteristics, can be supplied. A method for manufacturing a ball joint provided with a ball stud that has a spherical surface section and a holder section that pivotally holds the spherical surface section, said method comprising: an intermediate underlayer-forming step for forming an intermediate underlayer, that has a fine irregular surface structure, on the surface of the spherical surface section using a sputtering method; and an amorphous hard carbon film-forming step for forming an amorphous hard carbon film, that has a root mean square roughness on the surface of 6.5-35 nm, on the intermediate underlayer using a PIG plasma film formation method.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: September 19, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Koji Miyake, Ryohei Nishiumi, Kentaro Komori
  • Patent number: 9644888
    Abstract: A liquefier system includes: a feed line configured to feed a raw material gas from a raw material supply source such that a pressure of the raw material gas in a predetermined portion of the feed line is kept higher than or equal to a predetermined pressure; a cooling medium circulation line configured to cause a cooling medium to circulate; a static pressure gas bearing configured to be supplied with the gas that has a pressure higher than or equal to the predetermined pressure and to rotatably support a rotating shaft of an expansion turbine; and a bearing supply line configured to connect the predetermined portion of the feed line and a gas inlet of the static pressure gas bearing, such that the gas is supplied to the static pressure gas bearing.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: May 9, 2017
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Hidetsugu Ishimaru, Toshihiro Komiya, Seiji Yamashita, Yoshinobu Mori, Daisuke Kariya
  • Patent number: 9611543
    Abstract: The invention relates to a sliding element, such as a piston ring, having a coating on at least one running surface, which comprises, from the inside out, an adhesive layer (10), a metal-containing, preferably tungsten-containing, DLC layer (12), and a metal-free DLC layer (14), and is characterized in that the ratio of the thickness of the metal-free DLC layer to the thickness of the metal-containing DLC layer ranges from 0.7 to 1.5 and/or to the overall thickness of the coating ranges from 0.4 to 0.6.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: April 4, 2017
    Assignee: Federal-Mogul Burscheid GmbH
    Inventors: Marcus Kennedy, Michael Zinnabold
  • Patent number: 9613651
    Abstract: This bearing apparatus includes a shaft portion, a sleeve portion, and a fluid arranged between the shaft portion and the sleeve portion. A thrust dynamic pressure portion is filled with the fluid, and a surface of the fluid is defined in a seal portion. The thrust dynamic pressure portion includes a dynamic pressure generation portion including thrust dynamic pressure grooves, an intermediate portion arranged outside of the dynamic pressure generation portion and including an annular groove in the shape of a circular ring, and a discharge portion arranged outside of the annular groove and including discharge grooves. The annular groove is arranged to have a depth smaller than a minimum radial width of the seal portion. This makes it easier for any air bubble in the thrust dynamic pressure portion to travel into the seal portion in accordance with a flow of the fluid caused in the discharge portion to be discharged outward.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: April 4, 2017
    Assignee: NIDEC CORPORATION
    Inventor: Junya Mizukami
  • Patent number: 9605682
    Abstract: There is provided a blower fan including a motor. In its bearing apparatus, the inner circumferential surface of the rotor cylindrical portion 222b and the outer circumferential surface of the bearing portion are arranged to together define a seal gap 35. The bushing 26 includes a bushing base portion 260 and a bushing cylindrical portion 262. The inner circumferential surface of the bushing cylindrical portion 262 and the outer circumferential surface of the rotor cylindrical portion 222b are arranged to together define a vertical gap. The vertical gap is arranged to have a minimum radial width equal to or smaller than a maximum width of the seal gap. A lower end portion of the rotor raised portion 514 and an upper end portion of the bushing cylindrical portion 262 are arranged to together define a second horizontal gap 266a.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: March 28, 2017
    Assignee: NIDEC CORPORATION
    Inventors: Tomohiro Hasegawa, Shunji Matsumoto, Takahiro Kikuichi, Mitsuhito Nishio, Noriaki Yamada, Satoru Otsu, Hiroyoshi Teshima, Kiyoto Ida
  • Patent number: 9593682
    Abstract: The present disclosure refers to a partial texturization applied on a contact interface of a scroll fluid compressor. The scroll fluid compressor may have an orbiting whorl, a non-orbiting whorl, and a block frame which holds the orbiting whorl in contact with the non-orbiting whorl. The partial texturization can be applied on the lower surface of the orbiting whorl, the upper surface of the block frame, or both, and can include at least two first regions separated by second regions. The first regions have surfaces including a plurality of micro-cavities and the second regions have substantially smooth surfaces.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: March 14, 2017
    Assignee: WHIRLPOOL S.A.
    Inventors: Fernando Withers Torres, José Daniel Biasoli de Mello
  • Patent number: 9581043
    Abstract: A turbocharger includes: a thrust bearing fixed to a turbocharger main body; and a supply oil passage provided in the turbocharger main body to the thrust bearing. The thrust bearing includes: an insertion hole in which to insert the turbine shaft; pressure receiving portions displaced from one another in phase in a rotational direction of the turbine shaft, and each configured to form an oil film between the pressure receiving portion and the thrust collar to receive a thrust load by use of oil film pressure; and intervening portions each located between two of the pressure receiving portions adjacent in the rotational direction of the turbine shaft, and being further away from the thrust collar than the pressure receiving portions. The intervening portion vertically under the insertion hole at least partially has a surface further away from the thrust collar than the other intervening portions.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: February 28, 2017
    Assignee: IHI Corporation
    Inventors: Yutaka Uneura, Atsushi Koike, Hideyuki Kojima
  • Patent number: 9524745
    Abstract: A device including a first axial portion, a second axial portion, and a radial portion is disclosed. A portion of the second axial portion is configured to connect to a hub. An upper surface of the second axial portion may be positioned above an upper surface of a sleeve limiter shoulder when the portion of the second axial portion is connected to the hub. The radial portion connects the first axial portion to the second axial portion. The radial portion is configured to increase stiffness by increasing surface contact between the radial portion and the sleeve limiter shoulder.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: December 20, 2016
    Assignee: Seagate Technology LLC
    Inventors: Lynn Bich-Quy Le, Hans Leuthold, Chris M. Woldemar
  • Patent number: 9429193
    Abstract: A method includes compacting metal powder including at least not less than 70% by weight of particles with diameters of not more than 45 ?m to obtain a bearing material, sintering the bearing material, forming grooves for generating dynamic pressure on the sintered bearing material, and performing steam treatment to the sintered bearing material with the grooves to form a ferrosoferric oxide (Fe3O4) membrane on a porous surface of an inner surface or on porous surfaces of an inner surface and both end surfaces. Thus, gaps between particles become small because diameters of the particles of material powder of a powder sintered bearing material are approximately even and fine and are even small pores. As a result, sealing pores on the surface due to steam treatment is easy, and dynamic pressure cannot be leaked.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: August 30, 2016
    Assignee: PORITE CORPORATION
    Inventors: Yoji Takezaki, Shigeyuki Tanabe, Shinobu Aso
  • Patent number: 9376915
    Abstract: An air motor and an electric painting device improves driving efficiency, and includes a housing, a main shaft inserted inside of the housing, an impeller fixed concentrically with the main shaft to an inserted portion of the main shaft and having a plurality of turbine blades formed on the outer periphery, bearings for rotatably supporting the main shaft and the impeller, and a nozzle having a tubular or hole-shaped channel for ejecting compressed air to the respective turbine blades for rotating the impeller along the circumference. When M1=ve/a0 where ve denotes flow velocity of the compressed air in an entrance of the channel of the nozzle, and a0 denotes acoustic velocity, the length of the channel of the nozzle is set to a dimension of a calculated value or greater using a predetermined expression.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: June 28, 2016
    Assignee: NSK Ltd.
    Inventors: Naoya Kobayashi, Tsuyoshi Nakamura, Yuu Koiwa
  • Patent number: 9371859
    Abstract: Provided herein is an apparatus, including a stationary component; a rotatable component; a fluid dynamic bearing defined by the stationary component and the rotatable component; a first channel substantially parallel to the fluid dynamic bearing; a second channel substantially perpendicular to the first channel; and a fluid reservoir substantially parallel to the first channel, wherein the second channel fluidly connects the fluid reservoir to the first channel.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: June 21, 2016
    Assignee: Seagate Technology LLC
    Inventors: Lynn Bich-Quy Le, Christopher Woldemar
  • Patent number: 9341214
    Abstract: A porous oil-impregnated sleeve is used for a fluid dynamic pressure bearing. The sleeve includes an inner surface, a first axial end face, a first recessed portion, and a first dynamic pressure generating groove. The first recessed portion is positioned on the other side of a line segment, which connects one-side end portion of the inner surface with an inner end portion of the first axial end face, in a cross-section including the central axis. A bottom portion of the first recessed portion, which has the longest distance between itself and the line segment, is positioned closer to the other side than a bottom portion of the first dynamic pressure generating groove in the axial direction.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: May 17, 2016
    Assignee: NIDEC CORPORATION
    Inventors: Takehito Tamaoka, Kiyoto Ida, Masashi Hirayama, Kazuhiko Fukushima
  • Fan
    Patent number: 9341189
    Abstract: A fan includes a motor and an impeller. The motor includes a stationary portion and a rotating portion rotatably supported by the stationary portion. The stationary portion includes a stator and a bearing portion arranged inside of the stator. The rotating portion includes a rotor magnet arranged radially outside the stator; a shaft inserted in the bearing portion, and having an upper portion fixed to the impeller directly or through one or more members; and a thrust portion arranged axially opposite the bearing portion, and including an annular surface arranged around the shaft.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: May 17, 2016
    Assignee: NIDEC CORPORATION
    Inventors: Teiichi Hirono, Shinichiro Noda, Yoshiharu Ikegami, Tomohiro Hasegawa, Tomohiro Yoneda, Shunji Matsumoto, Seungsin Yoo, Kouta Kabune
  • Patent number: 9284985
    Abstract: An oil seal bearing of a fan includes a ring-shaped body for supporting a shaft of the fan, and a protruded portion disposed on the ring-shaped body. The protruded portion has a first slope, wherein the first slope is disposed corresponding to an inner top surface of a hub of the fan. An oil storage space is formed between the first slope, the shaft and the inner top surface for storing a lubricant. A first angle is formed by the extension of the first slope and the inner top surface, such that the lubricant is retained by the capillarity between the first slope and the inner top surface. Under this circumstance, the oil sealing is achieved without any additional oil seal, the effective bearing height is maximized, and the advantages of enhancing the supporting efficiency and lengthening the lifetime of the product are also achieved.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: March 15, 2016
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chao-Wen Lu, Chun-Chih Wang, Ding-Wei Chiu
  • Patent number: 9249829
    Abstract: Bearing assemblies, apparatuses, and motor assemblies using the same are disclosed. In an embodiment, a bearing assembly includes a plurality of superhard bearing elements distributed circumferentially about an axis. At least some of the superhard bearing elements may include a first end surface, a second end surface generally opposite the first end surface, a first side surface extending between the first end surface and the second end surface, a second side surface generally opposite the first side surface, and a bearing surface extending between the first end surface, the second end surface, the first side surface and the second side surface. Such superhard bearing elements may also include a ramped feature negatively sloping away from the bearing surface. The bearing assembly may further include a support ring that carries the plurality of superhard bearing elements.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: February 2, 2016
    Assignee: US SYNTHETIC CORPORATION
    Inventors: Craig H. Cooley, Timothy N. Sexton
  • Patent number: 9216428
    Abstract: Each spindle system turbine blade has front and rear surfaces relative to the rotational direction. The rear surface is a recessed columnar surface with a radius of curvature R1, while the front surface is a smooth continuous surface having a projecting columnar surface with a radius of curvature R2 larger than R1 and a flat surface between which a projecting columnar surface with a radius of curvature R3 larger than R1 is arranged. Among the three surfaces, the projecting columnar surface is at an inlet side of a channel straddling the projecting columnar surface, while the flat surface is at the outlet side. A space sandwiched between a facing front surface and rear surface of adjoining turbine blades forms a gas channel. Gas ejected from a nozzle flows in from an inlet in a direction along the arc-shaped curve of the recessed columnar surface and out an outlet.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: December 22, 2015
    Assignee: NSK LTD.
    Inventors: Naoya Kobayashi, Tsuyoshi Nakamura, Atsushi Takahashi
  • Patent number: 9200671
    Abstract: Disclosed herein is an apparatus that includes a fluid dynamic bearing defined in a gap between an inner component and an outer component. In some instances, the inner component and the outer component are configured for relative rotation. In some instances, the apparatus further includes a fluid reservoir configured to supply a fluid to the fluid dynamic bearing and the fluid reservoir is defined by shearless surfaces.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: December 1, 2015
    Assignee: Seagate Technology LLC
    Inventors: Hans Leuthold, Troy M. Herndon
  • Patent number: 9087547
    Abstract: A disk drive device includes a stationary body, a rotating body on which a recording disk is to be mounted, and a fluid bearing unit that supports the rotating body in a freely rotatable manner relative to the stationary body. The fluid bearing unit includes a lubricant that is fluorescent.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: July 21, 2015
    Assignee: SAMSUNG ELECTRO-MECHANICS JAPAN ADVANCED TECHNOLOGY CO., LTD.
    Inventor: Mitsuo Kodama
  • Publication number: 20150147010
    Abstract: A fluid dynamic bearing device (1), including: a bearing member (22) on a rotary side; a housing (7) on a stationary side; a sealing member (9); a radial bearing gap to be formed between an outer peripheral surface (22a) of the bearing member (22) and an inner peripheral surface (7a2) of the housing (7); and a thrust bearing gap to be formed between a lower end surface (22c) of the bearing member (22) and an inner bottom surface (7b1) of the housing (7). The radial bearing gap and the thrust bearing gap are filled with lubricating oil (11). An axial gap (10) containing air is formed between an upper end surface (22b) of the bearing member (22) and a lower end surface (9b) of the sealing member (9), which faces the upper end surface (22b) of the bearing member (22).
    Type: Application
    Filed: May 22, 2013
    Publication date: May 28, 2015
    Applicant: NTN CORPORATION
    Inventors: Shinji Komatsubara, Tetsuya Kurimura
  • Patent number: 9035516
    Abstract: There are provided a hydrodynamic bearing assembly and a motor including the same. The hydrodynamic bearing assembly includes a sleeve rotatably supporting a shaft and including a first circulation hole formed therein, the first circulation hole penetrating between an inner peripheral surface thereof and an outer peripheral surface thereof; a sleeve housing into which the sleeve is inserted; and a second circulation hole formed between the outer peripheral surface of the sleeve and an inner peripheral surface of the sleeve housing to be in communication with the first circulation hole, wherein an upper portion of the second circulation hole has a larger diameter than a lower portion thereof in an axial direction.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: May 19, 2015
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Myeung Hwa Heo, Won Ki Park, Satoru Sodeoka
  • Patent number: 9033580
    Abstract: The fluid dynamic bearing system has at, least one stationary part, and at least one rotating part that is supported rotatable about a rotational axis with respect to the stationary part. A bearing gap filled with bearing fluid is formed between mutually opposing surfaces of the stationary and of the rotating part. The bearing system includes at least one fluid dynamic radial bearing and at least one fluid dynamic axial bearing that are disposed along sections of the bearing gap. In one aspect of the invention, an annular sealing gap for sealing open ends of the bearing gap has one end connected to the bearing gap and one end connected to an annular reservoir, the outside radius of the reservoir measured from the rotational axis being larger than the outside radius of the sealing gap.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: May 19, 2015
    Assignee: MINEBEA CO., LTD.
    Inventors: Thomas Fuss, Martin Engesser, Atsushi Yanagawa, Werner Schmid, Carsten Etling
  • Patent number: 9030068
    Abstract: There is provided a spindle motor including: a shaft connected directly or indirectly to a base member and having a depression groove formed in a central portion of an outer peripheral surface thereof; a sleeve rotatably installed on the shaft and having a communication hole formed so as to be connected to the depression groove; and a rotor hub fixedly installed on the sleeve to thereby rotate together therewith, wherein the communication hole is inclined so that lubricating fluid may be easily injected into the depression groove, and the sleeve has a fluid storage part formed on an outer peripheral surface thereof, the fluid storage part being connected to the communication hole and temporarily storing the lubricating fluid therein.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: May 12, 2015
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Young Ha Park
  • Patent number: 9019656
    Abstract: A disk drive unit includes a rotor configured to rotate a disk accommodated within a disk accommodating space and set thereon, a fixed body configured to rotatably support the rotor, a fluid dynamic pressure generating part provided between the fixed body and the rotor, and a plurality of ring-shaped members, provided in an overlapping manner along a direction of a rotational axis of the rotor within a space that communicates the disk accommodating space and a gas-liquid interface of the lubricant, and covering a gap between the rotor and the fixed body.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: April 28, 2015
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Mitsuo Kodama, Ryusuke Sugiki
  • Patent number: 9006947
    Abstract: There is provided a spindle motor including: a base part including a base member and a lower thrust member fixedly installed on the base member; a shaft having a lower end portion fixedly installed on the base part; an upper thrust member fixedly installed on an upper end portion of the shaft; a sleeve disposed between the upper and lower thrust members and rotatably installed on the shaft; and a rotor hub fixedly installed on the sleeve to thereby rotate together therewith, wherein the sleeve includes a connection hole formed therein in order to connect an inner diameter portion thereof to an outer peripheral surface thereof.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: April 14, 2015
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Young Ha Park
  • Patent number: 8979374
    Abstract: A rotating device comprises a hub, a shaft, and a bearing unit. The bearing unit includes a surrounding portion arranged to surround the shaft, and a facing portion arranged to face an end of the shaft. A gap between the shaft and the surrounding portion includes two dynamic pressure generation portions and an intermediate portion arranged between the two dynamic pressure generation portions. The bearing unit further includes a path of a lubricant arranged to connect one side of one dynamic pressure generation portion and the intermediate portion. The shaft and the bearing unit are arranged so that the lubricant pushed out of the other dynamic pressure generation portion towards a gap between the end of the shaft and the facing portion stays in the gap.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: March 17, 2015
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Katsushige Konno, Kazuyoshi Nagai, Hiromitsu Goto
  • Patent number: 8967867
    Abstract: A first seal portion having a surface of a lubricating oil defined therein is defined between a sleeve portion and a bearing housing. A side communicating channel arranged to bring a first seal gap and a thrust gap into communication with each other is defined either between a sleeve portion and a bearing housing or in an outer circumferential portion of a sleeve portion. A second seal portion having another surface of a lubricating oil defined therein is defined in a gap constituted by a side minute gap between a thrust plate and a bearing housing and a lower minute gap between a thrust plate and a cap member.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: March 3, 2015
    Assignee: Nidec Corporation
    Inventors: Akihiro Kimura, Teiichi Hirono, Ryota Ogino, Kyoko Horise, Hiroyoshi Teshima, Masashi Hirayama
  • Publication number: 20150030481
    Abstract: A dynamic pressure bearing apparatus includes a bearing portion; a shaft; a substantially annular bushing; a radial dynamic pressure bearing portion; and a seal gap. A minute horizontal gap extending radially is defined between an upper surface of the bearing portion and a lower surface of the bushing. The seal gap is arranged to be in communication with an exterior space through the horizontal gap.
    Type: Application
    Filed: October 14, 2014
    Publication date: January 29, 2015
    Applicant: NIDEC CORPORATION
    Inventors: Tomotsugu Sugiyama, Teiichi Hirono, Shinichiro Noda, Akihiro Kimura, Yoshiharu Ikegami, Tomohiro Hasegawa, Masafumi Fujimoto, Tomohiro Yoneda
  • Patent number: 8939738
    Abstract: A thrust shaft for a fan has a shaft body with an enlarged disk adjacent one axial end to provide a rotating surface in a pair of thrust bearings. A first cylindrical portion extends from the disk in a first direction, and a second cylindrical portion extending from the disk in a second opposed direction. The second cylindrical portion has a hollow bore, and there are a plurality of holes extending through the second cylindrical portion to communicate an outer periphery with the bore. A ratio of the diameter of the bore to a diameter of the plurality of air holes is between 6.60 and 7.00. A ratio of an overall length of the second cylindrical portion, and a distance from a face of the enlarged disk to a center of the holes is between 14.4 and 15.2. A thrust bearing assembly, a fan, a cabin air supply system, and a method are also disclosed.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: January 27, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Craig M. Beers, Lawrence Binek, Valentina Lugo
  • Patent number: 8931175
    Abstract: It is an object of the present invention to provide a bearing member having a highly accurate dynamic pressure generating portion stably at low cost. Dynamic pressure grooves (8a1) and (8a2) are formed as the dynamic pressure generating portions on an inner circumferential surface of the electroforming portion (10) by an electroforming process, and injection molding is performed by using a resin while inserting the electroforming portion (10), thereby forming a bearing member (8). A shaft member (2) is inserted into an inner circumference of the bearing member.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: January 13, 2015
    Assignee: NTN Corporation
    Inventors: Natsuhiko Mori, Nobuyoshi Yamashita, Fuminori Satoji, Isao Komori, Toshiyuki Mizutani, Masafumi Okuma, Kenichi Mitani
  • Publication number: 20150010411
    Abstract: In a bearing mechanism according to a preferred embodiment of the present invention, a seal portion in which a surface of a lubricating oil is located is defined in a seal gap defined between an outer circumferential surface of a first tubular portion and an inner circumferential surface of a second tubular portion. The first tubular portion includes, in an area where the outer circumferential surface of the first tubular portion is in contact with the lubricating oil, a maximum outside diameter portion at which the outside diameter of the first tubular portion is greatest, an annular shoulder portion including a surface facing toward the surface of the lubricating oil and at which the outside diameter is smaller than at the maximum outside diameter portion, and an inclined portion at which the outside diameter gradually decreases from the annular shoulder portion toward the surface of the lubricating oil.
    Type: Application
    Filed: March 13, 2014
    Publication date: January 8, 2015
    Applicant: Nidec Corporation
    Inventors: Takehito Tamaoka, Kazuhiko Fukushima
  • Patent number: 8926183
    Abstract: An inner peripheral surface and a lower end surface of a bearing sleeve made of a sintered metal are each formed into a smooth cylindrical surface or a flat surface that does not have a dynamic pressure generating portion. Thus, a step of forming the dynamic pressure generating portion can be omitted from a manufacturing step of the bearing sleeve, and cost of dies can be markedly reduced. Further, the inner peripheral surface of the bearing sleeve is formed into the smooth cylindrical surface, and hence a radial dynamic pressure generating portion is formed on an outer peripheral surface of a shaft member. However, the outer peripheral surface of the shaft portion is accessible to tools, and hence the radial dynamic pressure generating portion can be formed easily with high accuracy. As a result, accuracy of a radial bearing gap is enhanced so that a bearing rigidity is enhanced.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: January 6, 2015
    Assignee: NTN Corporation
    Inventors: Hiroyuki Noda, Natsuhiko Mori, Tetsuya Kurimura, Isao Komori, Masaharu Hori, Kimihiko Bito, Toshiyuki Mizutani
  • Patent number: 8926184
    Abstract: Provided herein is an apparatus, including a fluid dynamic bearing, wherein the fluid dynamic bearing includes a set of pressure-generating grooves, and wherein the set of pressure-generating grooves includes a plurality of chevron-shaped grooves, each chevron-shaped groove including at least two selected from a non-uniform depth, non-uniform angle, a non-uniform width, or a non-uniform length, selected to provide a predetermined spindle-motor stiffness to the journal bearing during steady-state operation and during a shock event.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: January 6, 2015
    Assignee: Seagate Technology LLC
    Inventors: Paco Gregor Flores, Lynn Bich-Quy Le
  • Patent number: 8920033
    Abstract: A fluid dynamic bearing system having pressure-generating surface patterns that comprises at least two bearing parts that are rotatable with respect to one another and form a bearing gap filled with bearing fluid between associated bearing surfaces. The surface patterns are disposed on at least one bearing surface that is defined by a first rim and a second rim, hydrodynamic pressure being built up within the bearing gap on rotation of the bearing parts with respect to one another. At least parts of the surface patterns extend from the first rim to the second rim of the bearing surface.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: December 30, 2014
    Assignee: Minebea Co., Ltd.
    Inventor: Martin Bauer
  • Publication number: 20140368951
    Abstract: There are provided a spindle motor including a second thrust member installed on a base member; a shaft installed on the second thrust member; a sleeve disposed above the second thrust member and installed to be rotatable with respect to the shaft; a rotor hub coupled to the sleeve; and a first thrust member disposed above the sleeve and installed on the shaft, wherein the sleeve includes a circulation hole penetrating therethrough in an axial direction, the sleeve and the first thrust member include a first thrust bearing formed therebetween and the sleeve and the second thrust member include a second thrust bearing formed therebetween, and an area by which an upper end portion of the circulation hole is overlapped with the first thrust bearing is larger than an area by which a lower end portion of the circulation hole is overlapped with the second thrust bearing.
    Type: Application
    Filed: August 23, 2013
    Publication date: December 18, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Dong Hyun LEE, Song Bon OH
  • Patent number: 8912680
    Abstract: A rotary electric machine for a wind power turbine for generating electric power has a tubular stator having a plurality of stator segments; a tubular rotor which has a plurality of rotor segments, is located inside the tubular stator, and rotates about an axis of rotation with respect to the tubular stator; a sleeve located at least partly inside the tubular rotor and connectable to a supporting frame of the wind power turbine; and a bearing located inside and fixed to the sleeve, and which supports the tubular rotor rotating with respect to the sleeve.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: December 16, 2014
    Assignee: Wilic S.AR.L.
    Inventors: Emmanuele Gelmini, Matteo Casazza