Resilient Mounting Member Or Seal Patents (Class 384/119)
  • Patent number: 10100932
    Abstract: A porous media ventless thrust bearing seal is disclosed. The porous media thrust bearing may include a primary porous media thrust bearing also serving as a seal ring including porous media positioned over a plenum and a port connected to the plenum, and conductive passages for communicating pressurized fluid to the plenums through the ports of the primary ring. The porous media ventless thrust bearing may also include a treated process gas supplied to a port which is closest to the untreated process gas, at a pressure which is higher than the untreated process gas. An inert gas (or fluid in a liquid state) may be supplied to the remaining port, at a pressure which is the same as the untreated process gas. A certain amount of treated process gas may flow into the untreated process gas, and may prevent the untreated gas from entering the porous media seal.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: October 16, 2018
    Assignee: NEW WAY MACHINE COMPONENTS, INC.
    Inventor: Andrew J. Devitt
  • Patent number: 10047794
    Abstract: A rolling bearing (1) for an exhaust gas turbocharger, including an outer race (2) and an inner race (3), between which there roll rolling bodies (4) guided by a cage (7). The cage (7) is then guided with a cage guiding surface (9) on a raceway (10) of the outer race (2) and is equipped with openings (11) which connect the cage guiding surface (9) with that side of the cage (7) oriented toward the inner race (3), in order to guide lubricant thrown off through the inner race (3) between the cage guiding surface (9) and the raceway (10). In order to now improve a lubricant supply to the cage guide, the cage (7) is provided, on the side oriented toward the inner race (3), with at least one groove (12) into which each of the openings (11) opens.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: August 14, 2018
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Heiko Schmidt, Christopher Mitchell
  • Patent number: 9644675
    Abstract: A system and method are provided for sealing a fluid dynamic bearing motor. A first and a second folded fluid channel are shaped for maximizing bearing axial span and establishing angular stiffness, to resist gyroscopic rocking of the facing bearing surfaces. The first folded fluid channel is limited to occupying at least a portion of the same axial space as the bearing. A first and a second fluid sealing system are connected to opposite axial ends of the bearing. The first fluid sealing system forms an active pumping seal to pump fluid during motor rotation. In an aspect, a top cover attached shaft, and a single thrust surface are employed, allowing for a rigid motor structure and power reduction in applications including high rotational speed disc drives. Also, by employing a rigid shaft design, significantly lower amplitude radial vibration responses are exhibited at higher frequencies than prior art motor designs.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: May 9, 2017
    Assignee: Seagate Technology LLC
    Inventors: Lynn B. Le, Alan L. Grantz
  • Patent number: 9482277
    Abstract: An air bearing shaft for a cabin air compressor includes a first edge and a second edge, a surface extending between the first edge and the second edge, and chrome plating on the surface between the first edge and the second edge. L1 is a first distance from the first edge of the air bearing shaft to a first end of the chrome plating. L2 is a second distance from the first edge of the air bearing shaft to a second end of the chrome plating.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: November 1, 2016
    Assignee: Hamilton Sundstrand Corporation
    Inventors: David A. Dorman, Peter A. Wierzbowski
  • Patent number: 9429191
    Abstract: A journal bearing assembly includes a bearing housing, a plurality of bearing pads, and a plurality of bearing pad support assemblies. The bearing housing includes a radial outer wall. The plurality of bearing pads are mounted within the bearing housing, and include at least one of a gas permeable porous media and an array of gas delivery holes. The plurality of bearing pad support assemblies are radially interposed between the bearing pads and the radial outer wall. Each of the bearing pad support assemblies includes a spring assembly and a damper assembly.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: August 30, 2016
    Assignee: General Electric Company
    Inventors: Bugra Han Ertas, Adolfo Delgado Marquez, Darren Lee Hallman, Walter John Smith
  • Patent number: 9109622
    Abstract: Rotor support structures including anisotropic foil bearings or anisotropic bearing housings are provided for controlling non-synchronous vibrations of rotating machinery. The rotor support structure comprises a foil bearing adapted to be disposed around a journal of a rotating rotor shaft and a bearing housing disposed around the foil bearing, wherein one of the foil bearing or the bearing housing is configured to be anisotropic. The anisotropic foil bearing and anisotropic bearing housing exhibit a stiffness in a first support direction that varies in magnitude from that in a second support direction that is substantially orthogonal to the first support direction.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: August 18, 2015
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Walter Lee Meacham, Marshall Saville, Alan Margolis
  • 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
  • Publication number: 20150117803
    Abstract: An air pressure bearing including a bearing including an outer bearing race and inner bearing race with a bearing gap therebetween, mounted between an outer race support ring and inner race support structure. Pressurized air is monitored, for example air pressure and flow rate, and supplied to the bearing and exhausted from the bearing. A control module is used to adjust characteristics of the pressurized air to achieve design application parameters, such as load carrying, stiffness and dampening. A method of controlling an active air pressure bearing is also described, including providing and monitoring pressurized air and adjusting air supply to meet application design parameters.
    Type: Application
    Filed: January 5, 2015
    Publication date: April 30, 2015
    Applicant: Schaeffler Technologies GmbH & Co. KG
    Inventors: Yohannes Haile, Zheng Wang
  • Publication number: 20150117802
    Abstract: A device of the axial-directional oil chamber of hydrostatic spindle comprises integrated oil seal structures at both the axial direction and the radial direction. The oil seal structures increase the work area of the oil chamber by extending and thus connecting an axial-directional oil seal edge to a radial-directional oil seal edge. Then, the rigidity of the axial hydrostatic bearing can be increased, and thus the application capability of the hydrostatic spindle can be upgraded to perform the multi-task machining from the mono-task machining.
    Type: Application
    Filed: January 21, 2014
    Publication date: April 30, 2015
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: SHANG-TE CHEN, HSIN-CHUAN SU, YAN-SIN LIAO, HSI-HUNG HSIAO
  • Publication number: 20150104124
    Abstract: A hermetically sealed damper assembly includes a sealed damper housing, a plunger, and a load transferring member coupled to the plunger. The sealed damper housing includes a body having a cavity and a resistive flow path defined therein. The cavity and resistive flow path are filled with a viscous fluid. The body includes a plurality of springs integrally formed therein. The plunger is disposed within the cavity, and separates the cavity into a first control volume and a second control volume. The resistive flow path provides fluid communication between the first and second control volumes. The plunger is coupled to the damper housing by the plurality of springs such that the springs provide a restorative force to the plunger. The load transferring member is configured to transmit mechanical loads to the plunger.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 16, 2015
    Applicant: General Electric Company
    Inventors: Adolfo Delgado Marquez, Bugra Han Ertas, Darren Lee Hallman, Walter John Smith
  • Publication number: 20150104123
    Abstract: A journal bearing assembly includes a bearing housing, a plurality of bearing pads, and a plurality of bearing pad support assemblies. The bearing housing includes a radial outer wall. The plurality of bearing pads are mounted within the bearing housing, and include at least one of a gas permeable porous media and an array of gas delivery holes. The plurality of bearing pad support assemblies are radially interposed between the bearing pads and the radial outer wall. Each of the bearing pad support assemblies includes a spring assembly and a damper assembly.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 16, 2015
    Applicant: General Electric Company
    Inventors: Bugra Han Ertas, Adolfo Delgado Marquez, Darren Lee Hallman, Walter John Smith
  • 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: 8973848
    Abstract: An air bearing assembly supporting a turbine driven rotatable motor shaft is provided. The assembly includes a composite cylindrical air bearing having alternating, bonded segmented porous carbon sections and nonporous carbon sections. The composite bearing has a sleeve installed circumferentially therearound. The sleeve has openings therein, therethrough and therearound such that the openings are adjacent the porous carbon sections and are oriented so as to be in longitudinal and circumferential registry with the porous carbon sections. Air passageways deliver supplied air into and through the sleeve openings, thence into and through the porous sections, thereby providing frictionless support for the rotating shaft. The assembly includes “O”-rings installed circumferentially therearound, one at each end of the assembly. A specific embodiment, namely a rotary bell cup atomizer driven by a turbine mounted on a rotatable motor shaft supported by the air bearing assembly, is disclosed and claimed.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: March 10, 2015
    Assignee: EFC Systems, Inc.
    Inventors: Gunnar van der Steur, Joseph Cichocki
  • Patent number: 8967865
    Abstract: A bearing apparatus includes a first cup portion defining a portion of a stationary portion of a bearing apparatus includes a first circular plate portion and a first cylindrical portion projecting downward from an outer edge portion of the first circular plate portion. A rotating portion of the bearing apparatus includes an annular recessed portion arranged to accommodate at least a lower end portion of the first cylindrical portion. The stationary portion includes a second cup portion including a second circular plate portion arranged to extend radially outward from an outer circumferential surface of a stationary shaft below the first cup portion and a second cylindrical portion arranged to project upward from an outer edge portion of the second circular plate portion. One of the first and second cup portions is integral with the stationary shaft defining a single monolithic member, and the other is fixed to the stationary shaft.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: March 3, 2015
    Assignee: Nidec Corporation
    Inventors: Akihiro Kimura, Teiichi Hirono, Kunio Sakurada, Kyoko Horise
  • Patent number: 8882446
    Abstract: A bearing system for a rotor in rotating machines, such as compressors, pumps, turbines, expanders, has points of bearing and sealing for the rotor each being in the form of a combined bearing and sealing formed by a stator situated within a rotating machine house and surrounding the rotor. The stator is formed with a bore, whereby an annular clearance is created between stator and rotor, and the bore is having sectional area gradually increasing in the direction of larger pressure within the rotating machine.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: November 11, 2014
    Assignee: Statoil Petroleum AS
    Inventor: Harald Underbakke
  • Publication number: 20140294329
    Abstract: In order to effect a seal; a porous material which comprises one side of two opposing surfaces is used to restrict and evenly distribute externally pressurized gas, liquid, steam, etc. between the two surfaces, exerting a force which is opposite the forces from pressure differences or springs trying to close the two faces together and so may create a non contact seal that is more stable and reliable than hydrodynamic seals currently in use.
    Type: Application
    Filed: June 16, 2014
    Publication date: October 2, 2014
    Applicant: NEW WAY MACHINE COMPONENTS, INC.
    Inventor: Andrew DEVITT
  • Patent number: 8845194
    Abstract: A rotary device includes a fixed body including a shaft; a rotary body including a sleeve being configured to surround the shaft through lubricant; and first and second taper seals provided in a space between the fixed body and the rotary body in which gas-liquid interfaces of the lubricant exist, respectively, when the rotary device is operated, the first and taper seals being configured such that a lower limit of a filling ratio of the second taper seal corresponds to a predetermined range of the filling ratio of the first taper seal including its lower limit of the filling ratio, and an upper limit of the filling ratio of the second taper seal corresponds to a predetermined filling ratio of the first taper seal that is larger than an upper limit of the predetermined range and lower than an upper limit of the first taper seal.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: September 30, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Mitsuo Kodama, Ryusuke Sugiki
  • Publication number: 20140270603
    Abstract: Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.214 and 3.216 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.
    Type: Application
    Filed: April 30, 2013
    Publication date: September 18, 2014
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Seth E. Rosen, Ronald M. Struziak
  • Publication number: 20140270604
    Abstract: Disclosed is a bearing sleeve for supporting a shaft of an air cycle machine. The bearing sleeve includes an outer diameter and an inner diameter. The outer diameter is within a range of 3.222 and 3.224 inches. Further included is a foil retaining cavity provided in the inner diameter of the sleeve. The foil retaining cavity includes a slot and first and second openings located at opposing axial ends of the slot. Each of the first and second openings include a small portion and a large portion having different axial lengths. A ratio of the combined axial lengths of the large portions to an axial length of the foil retaining cavity is within a range of 0.19:1 and 0.22:1. Further included is a seal attachment portion provided at one axial end of the bearing sleeve configured to circumferentially support a seal.
    Type: Application
    Filed: April 30, 2013
    Publication date: September 18, 2014
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Seth E. Rosen, Ronald M. Struziak
  • Patent number: 8823230
    Abstract: A motor includes a stationary portion and a rotating portion. The rotating portion includes a sleeve portion. The sleeve portion includes a communicating hole. A dynamic pressure bearing is defined in a first gap between a shaft portion and the sleeve portion. An upper seal portion and a lower seal portion are arranged radially outward of the dynamic pressure bearing. The upper seal portion and the lower seal portion are arranged in communication with each other through the communicating hole. The communicating hole and a space extending from the upper seal portion to the lower seal portion through the first gap are filled with a lubricating oil. A fixing region where an outer tubular portion and a base portion are fixed to each other is arranged to overlap with the dynamic pressure bearing in a radial direction in plan view.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: September 2, 2014
    Assignee: Nidec Corporation
    Inventors: Junya Mizukami, Takayuki Oe, Yoichi Sekii, Naoki Sabashi, Hideki Nishimura, Takehito Tamaoka, Takashi Yamamoto
  • Patent number: 8810096
    Abstract: A spindle motor includes a stationary portion and a rotating portion. The stationary portion preferably includes a shaft portion, a lower plate portion, and an outer tubular portion. The rotating portion preferably includes an inner tubular portion and a flange portion including a communicating hole. An upper seal portion is arranged radially outward of a first gap, and a lower seal portion is arranged radially outward of a second gap. The upper and lower seal portions are arranged in communication with each other through the communicating hole. The communicating hole and a space extending from the upper seal portion to the lower seal portion through the first gap, the second gap, and a third gap are filled with a lubricating oil. The third gap includes a dynamic pressure generation portion arranged to produce a radially inward pressure acting on the lubricating oil.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: August 19, 2014
    Assignee: Nidec Corporation
    Inventors: Junya Mizukami, Takayuki Oe, Yoichi Sekii, Naoki Sabashi, Hideki Nishimura, Takehito Tamaoka, Takashi Yamamoto
  • Patent number: 8810095
    Abstract: A dynamic pressure bearing is defined in a first gap between a shaft portion and a sleeve portion. An upper seal portion extending upward and a lower seal portion extending downward are arranged radially outward of the dynamic pressure bearing. Each of the upper seal portion and the lower seal portion includes a surface including a lubricating oil located therein. The upper seal portion and the lower seal portion are arranged in communication with each other through a communicating hole defined in the sleeve portion. The communicating hole and a space ranging from the upper seal portion to the lower seal portion through the first gap are filled with the lubricating oil. The axial distance between the surfaces of the lubricating oil in the upper seal portion and the lower seal portion is arranged to be shorter than the axial distance between an upper end and a lower end of the dynamic pressure bearing.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: August 19, 2014
    Assignee: Nidec Corporation
    Inventors: Junya Mizukami, Takayuki Oe, Yoichi Sekii, Naoki Sabashi, Hideki Nishimura, Takehito Tamaoka, Takashi Yamamoto
  • Patent number: 8794839
    Abstract: A bearing apparatus includes a stationary shaft, a first annular member, and a rotating member. The rotating member includes a first inner circumferential surface arranged opposite to the outer circumferential surface of the stationary shaft, and a second inner circumferential surface arranged opposite to an outer circumferential surface of the first annular member. A lubricating oil is arranged in a gap between a surface of a stationary member and the rotating member. On an upper side of an upper surface of the lubricating oil, the first annular member and the rotating member are arranged radially opposite to each other with a slight gap defined therebetween, so that a labyrinth seal is defined. The labyrinth seal and a fixing range over which the stationary shaft and the first annular member are fixed to each other are arranged to overlap with each other in a radial direction.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: August 5, 2014
    Assignee: Nidec Corporation
    Inventors: Akihiro Kimura, Teiichi Hirono, Kunio Sakurada, Kyoko Horise, Takehito Tamaoka, Kazuhiro Sato, Yoichi Sekii
  • Patent number: 8777488
    Abstract: A motor includes a rotor having a permanent magnet; a sleeve rotatably supporting the rotor; fluid provided in a gap between the rotor and the sleeve; a stator having a electromagnet disposed opposite to the permanent magnet to rotate the rotor relative to the stator; and a boss interposed between the sleeve and the stator. In the motor, the sleeve, the stator, and the boss are provided as separate members.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: July 15, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Hiromitsu Gotoh, Atsushi Ohta
  • Patent number: 8746977
    Abstract: Provided is a bearing capable of satisfying demands for cost reduction and further quietness, and stably maintaining high support accuracy. A sliding bearing (4) includes an inner member (5) having a mounting surface (9) with respect to a rotary shaft (2), and an outer member (6) being arranged on a radially outer side of the inner member (5). A radial bearing gap is formed between an outer peripheral surface (5a1) of the inner member (5) and an inner peripheral surface (7a1) of the outer member (6), and a lubricating oil is interposed in the radial bearing gap. Further, between the inner member (5) and the outer member (6), sealing gaps (S, S) for maintaining an oil level of the lubricating oil on both axial sides of the radial bearing gap are formed. At least a part of the mounting surface (9) of the inner member (5) is made of a metal.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: June 10, 2014
    Assignee: NTN Corporation
    Inventors: Masaharu Hori, Natsuhiko Mori, Wei Shin Sim
  • Patent number: 8734019
    Abstract: Method, retention mechanism and bearing device for retaining at least one pad inside the bearing device. The bearing device includes a ring having at least a retaining head, at least one pad disposed inside the ring and having a bottom recess portion configured to receive the at least a retaining head, the at least one pad being configured to pivot on the at least a retaining head, and a retention mechanism configured to retain the at least one pad within a predetermined volume inside the ring. The retention mechanism is configured to apply a retaining force on the at least one pad, in addition to a force between the retaining head and the at least one pad, where the retaining force acts substantially along a radial direction of the ring, away from a center of the ring.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: May 27, 2014
    Assignee: Nuovo Pignone S.p.A.
    Inventors: Sergio Palomba, Marco De Iaco, Andrea Masala, Anichini Alessio, Grifoni Francesco
  • Patent number: 8734130
    Abstract: An exemplary anisotropic member supports a semi-floating bearing in a bore and can reduce non-synchronous vibration of the bearing in the bore. An anisotropic member can include an annular body configured to receive a semi-floating bearing and to space the bearing a distance from a bore surface and can be configured to impart anisotropic stiffness and damping terms to the semi-floating bearing when positioned in the bore. Such a member is suitable for use in a rotating assembly for a turbocharger where the bearing may be a semi-floating bearing. Various exemplary members, bearings, housings, assemblies, etc., are disclosed.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: May 27, 2014
    Assignee: Honeywell International Inc.
    Inventors: Walter Lee Meacham, Kostandin Gjika, Mohsiul Alam, Gerald D. LaRue
  • Publication number: 20140133789
    Abstract: An apparatus includes a stationary shaft and a sleeve rotatable with respect to the shaft. A fluid dynamic bearing is defined by the stationary shaft and the sleeve. A fluid channel includes a first axially extending portion in the fluid dynamic bearing, and a radially extending portion extending radially outward from the first axially extending portion. In addition the fluid channel includes a second axially extending portion extending axially downward from the radially extending portion. The apparatus further includes a pump seal including grooves formed in the second axially extending portion.
    Type: Application
    Filed: January 17, 2014
    Publication date: May 15, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Lynn B. Le, Alan Lyndon Grantz
  • Patent number: 8690435
    Abstract: A dynamic pressure bearing has a reduced axial dimension and is constructed to ensure smooth feeding of a lubricating oil. The dynamic pressure bearing includes a communicating hole and at least one tapered seal, and is constructed such that an opening angle of one of the at least one tapered seal through which oil feeding is possible is in a range of about 30 degrees inclusive to about 180 degrees exclusive, a tapered seal wall surface depth W1 of the tapered seal is about 0.3 mm or more, and a sum of distances over which the lubricating oil travels from both sides of an end portion of the communicating hole in a cross-section beyond a wall surface of the communicating hole along a wall surface opposite the end portion of the communicating hole exceeds an inside diameter of the communicating hole.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: April 8, 2014
    Assignee: Nidec Corporation
    Inventors: Akihiro Kimura, Kyoko Horise, Ryota Ogino, Kunio Sakurada, Teiichi Hirono
  • Publication number: 20140072250
    Abstract: A bearing assembly includes a bearing formed to at least radially guide a shaft, a seat for the bearing, an annular gap around the bearing between the bearing and the seat that allows the bearing to undergo a movement perpendicular to an axis of the bearing, a magnetorheological fluid in the gap and a magnetic field source configured to subject the magnetorheological fluid to a magnetic field. Also, a method of controlling a strength of the magnetic field generated by the magnetic field source to control a viscosity of the magnetorheological fluid and affect an operating condition of the bearing assembly.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 13, 2014
    Applicant: Aktiebolaget SKF
    Inventors: Henning Kern, Jochen Lorenscheit, Horst Niedermeyer, Ilim Topaloglu
  • Publication number: 20140056548
    Abstract: A rotary device includes a fixed body including a shaft; a rotary body including a sleeve being configured to surround the shaft through lubricant; and first and second taper seals provided in a space between the fixed body and the rotary body in which gas-liquid interfaces of the lubricant exist, respectively, when the rotary device is operated, the first and taper seals being configured such that a lower limit of a filling ratio of the second taper seal corresponds to a predetermined range of the filling ratio of the first taper seal including its lower limit of the filling ratio, and an upper limit of the filling ratio of the second taper seal corresponds to a predetermined filling ratio of the first taper seal that is larger than an upper limit of the predetermined range and lower than an upper limit of the first taper seal.
    Type: Application
    Filed: May 16, 2013
    Publication date: February 27, 2014
    Applicant: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Mitsuo Kodama, Ryusuke Sugiki
  • Patent number: 8618706
    Abstract: A motor includes a rotatable component rotatable relative to a stationary component, a fluid operable to flow between the rotatable and stationary component, and a capillary sealing component. The capillary sealing component provides a capillary seal and includes at least one tapered slot configured to pump the fluid between the rotatable and stationary components.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: December 31, 2013
    Assignee: Seagate Technology LLC
    Inventors: Alan L. Grantz, Lynn B. Le, Klaus Kloeppel
  • Patent number: 8568033
    Abstract: In a bearing apparatus, a first cup portion defining a portion of a stationary portion of a bearing apparatus includes a circular plate portion and a cylindrical portion projecting downward from an outer edge portion of the circular plate portion. A rotating portion of the bearing apparatus includes an annular recessed portion arranged to accommodate at least a lower end portion of the cylindrical portion. Accordingly, it is possible to limit the axial dimension of the bearing apparatus while also enabling a radial dynamic pressure groove array. Additionally, one end of a through hole defined in the rotating portion is arranged to open into the annular recessed portion.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: October 29, 2013
    Assignee: Nidec Corporation
    Inventors: Akihiro Kimura, Teiichi Hirono, Kunio Sakurada, Kyoko Horise
  • Patent number: 8562220
    Abstract: A fluid dynamic bearing system having a first conical bearing and a second conical bearing working in opposition to the first conical bearing, wherein the two conical bearings are disposed along a stationary shaft, wherein the first and the second conical bearing each comprises a bearing cone disposed on the shaft having bearing surfaces as well as a conical counter bearing disposed in a rotor component that are separated from one another by a bearing gap filled with a bearing fluid, wherein the bearing gap has a first open end that is sealed by a first sealing gap partially filled with bearing fluid, wherein the bearing fluid in the sealing gap forms a fluid meniscus.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: October 22, 2013
    Assignee: Minebea Co., Ltd.
    Inventors: Wolfgang Efinger, Matthias Bosnjak
  • Patent number: 8562221
    Abstract: Disclosed herein is a spindle motor including: a shaft; a sleeve supporting the shaft; a hub including the shaft coupled to the center of rotation thereof; a sealing member including an operating fluid provided between the shaft and the sleeve and formed to be spaced apart from an outer peripheral surface of the sleeve; an oil sealing part including an oil interface formed between an inner peripheral surface of the sealing member and the outer peripheral surface of the sleeve facing each other, and a sealing surface layer formed on an outer side of the oil interface. The sealing surface layer is formed from an inner side of the oil interface formed in the oil sealing part of a fluid dynamic pressure bearing part toward the outer side thereof, thereby making it possible to improve an oil sealing effect in the oil interface.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: October 22, 2013
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Ju Ho Kim
  • Patent number: 8454239
    Abstract: A first axial gap (L1) is formed between a seal portion (9) and a sleeve portion (8). With this, it is possible to set a moving amount of a shaft member (2) in an axial direction with high accuracy irrespective of accuracy of members such as the sleeve portion (8).
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: June 4, 2013
    Assignee: NTN Corporation
    Inventors: Kimihiko Bitou, Isao Komori, Tetsuya Kurimura
  • Patent number: 8449190
    Abstract: An turbocharger assembly can include a compressor side ring disposed at least partially in a compressor side annular notch of a bearing, the ring in contact with a bore wall of a housing and the bearing to hinder axial flow of lubricant to a compressor end of the bearing and to reduce variation in a lubricant squeeze film thickness defined by and between the bearing and the bore wall and a turbine side ring disposed at least partially in a turbine side annular notch, the ring in contact with the bore wall and the bearing to hinder axial flow of lubricant to the turbine end of the bearing and to reduce variation in the lubricant squeeze film thickness. Various other springs, bearings, housings, assemblies, etc., are also disclosed.
    Type: Grant
    Filed: July 21, 2012
    Date of Patent: May 28, 2013
    Assignee: Honeywell International Inc.
    Inventor: Gerald D. Larue
  • Publication number: 20130119801
    Abstract: There is provided a bearing assembly including: a sleeve supporting a rotation of a shaft via dynamic fluid pressure generated in oil interposed therebetween; a boss rotating together with the shaft; and a sealing part including an oil sealing part disposed above the sleeve to seal the oil between the oil sealing part and the shaft and a gap forming part extended upwardly in an axial direction from the oil sealing part to form a gap preventing a leakage of the oil between the gap forming part and the boss.
    Type: Application
    Filed: September 14, 2012
    Publication date: May 16, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Viatcheslav SMIRNOV, Chang Keun Jun, Duck Shik Kim
  • Patent number: 8419281
    Abstract: An inner periphery of a molded part having a step from an inner periphery of an electroformed part is molded to a nonconductive coating which covers the surface of a master. When the nonconductive coating is removed, a radial clearance having a diameter greater than that of a bearing clearance is created between the inner periphery of the molded part, which is exposed to the interior, and an outer periphery of a shaft member. A bearing member which forms the bearing and radial clearance with the shaft member is manufactured by performing electroforming on the master with the nonconductive coating formed on part of the surface of the master, thereby forming the electroformed part; then injection molding the bearing member with the electroformed part and the nonconductive coating on the surface of the master inserted into a cavity; and then removing the nonconductive coating from the bearing member.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: April 16, 2013
    Assignee: NTN Corporation
    Inventors: Kenji Hibi, Yasuhiro Yamamoto, Tetsuya Yamamoto, Mitsuo Sasabe
  • Patent number: 8403565
    Abstract: An oil film is formed in a radial bearing clearance of a first radial bearing portion (R1) and a second radial bearing portion (R2) so as to rotatably support a shaft member (2). A bearing sleeve (8) and the shaft member (2) are accommodated in a housing (7), and the housing (7) has an inner space filled with a lubricant oil and has an opening sealed by a seal member (9). A first seal space (S1) is formed by means of an inner peripheral surface (9a2) of the seal member (9). The housing (7) and the seal member (9) are formed through injection molding of a resin.
    Type: Grant
    Filed: March 13, 2007
    Date of Patent: March 26, 2013
    Assignee: NTN Corporation
    Inventors: Masaharu Hori, Yoshiharu Inazuka
  • Patent number: 8388227
    Abstract: A hydrodynamic bearing assembly according to an aspect of the invention may include: a sleeve against which a shaft is supported so that an upper end of the shaft, being compressed and inserted into a hub base of a rotor case, protrudes upwardly in an axial direction; a first oil sealing unit having a first oil interface provided between the hub base and a counterpart component arranged downwardly in the axial direction; and a second oil sealing unit communicating with the first oil sealing unit through a communication channel and being tapered to form a second oil interface inside or outside the sleeve, wherein oil in the first oil sealing unit moves toward the second oil sealing unit along an inner diameter direction by a rotation of the rotor case.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: March 5, 2013
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Chang Jo Yu
  • Patent number: 8356938
    Abstract: A fluid dynamic bearing apparatus includes shaft member 2, housing 7, sleeve portion 8, and sealing portions 9, 10. The housing 7 includes a straight cylindrical inner circumferential surface with a constant diameter and openings at both axial ends thereof. The sleeve portion 8 is provided separately from the housing 7 and fixed to the inner circumferential surface of the housing 7. A radial bearing gap is formed between the inner circumferential surface 8a of the sleeve portion 8 and the outer circumferential surface 2a of the shaft member 2 , and thrust bearing gaps are formed between the end faces 9b, 10b of the sealing portions 9, 10 and the end faces 8b, 8c of the sleeve portion 8 opposing these to support the shaft member 2 in a non-contact manner in the radial direction and in the thrust direction by the hydrodynamic effect of a lubricating oil produced in each bearing gap.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: January 22, 2013
    Assignee: NTN Corporation
    Inventors: Kazuto Shimizu, Toshiyuki Mizutani, Masaharu Hori
  • Patent number: 8348291
    Abstract: A suspension strut includes a suspension strut bearing and a deflector seal. The suspension strut bearing has an upper portion mounted above a lower portion and a bearing seal mounted therebetween. The upper portion does not rotate with a steerable assembly while the lower portion does, with the upper portion including a lower surface adjacent to a seal opening. The deflector seal is elastomeric and is a toroidal shape, having a radially inner portion and a radially outer portion. The inner portion is secured against the lower portion of the strut bearing, and the outer portion is cantilevered outward from the inner portion to allow for elastic flexing of the outer portion. The outer portion allows for upward elastic flexing into contact with the lower surface of the upper portion of the strut bearing when a fluid or contaminant impinges upon a lower surface of the outer portion.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: January 8, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Myron P. Sedman, David M. Caldwell, Ferdous M. Ghazi, James Logan, Jr., William A. Morris
  • Patent number: 8337086
    Abstract: A bearing apparatus includes a shaft, a thrust cup including an annular potion and a cylindrical portion, a rotating member including a through hole defined therein, and a lubricating oil. A second gap defined between a lower surface of the rotating member and an upper surface of the annular portion of the thrust cup includes a first region in communication with a capillary seal portion, and a second region positioned radially inward of the first region and having an axial dimension smaller than that of the first region. A lower end portion of the through hole is open at a location radially outwardly away from a boundary between the first and second regions, so that a local circulation of the lubricating oil arises within the first region during rotation of the rotating member.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: December 25, 2012
    Assignee: Nidec Corporation
    Inventors: Takayuki Oe, Teiichi Hirono, Kunio Sakurada, Junya Mizukami
  • Publication number: 20120315137
    Abstract: A bearing chamber apparatus (2) comprising a bearing chamber (4) having one or more seals (7) which seal an interior (5) of the chamber from an exterior (24) of the chamber; and further comprising: a pump in fluid communication with the interior of the chamber; and a controllable valve (20) in fluid communication with the interior of the chamber and the outside atmosphere. The arrangement allows oil leakage from the bearing chamber to be prevented and also allows a minimum pressure to be maintained within the bearing chamber.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 13, 2012
    Applicant: ROLLS-ROYCE PLC
    Inventors: Aida ALVAREZ, Yi WANG, Lee A. CLARK
  • Patent number: 8328424
    Abstract: A resilient (slide) bearing device, for example for use in connection with support of a rotating element in a vessel, where the bearing insert comprises devices for gradual absorption of loads to which the bearing is exposed. This is achieved by the devices for gradual absorption of loads comprising two or more elastic elements with different modulus of elasticity, where the elements are furthermore placed in layers. A method for maintenance and service of the device is also presented.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: December 11, 2012
    Assignee: FRAMO Engineering AS
    Inventors: Lars Seim, Ketil Bøe, Vidar Åsmul
  • Patent number: 8322927
    Abstract: A fluid dynamic bearing having at least one first bearing part as well as a second bearing part that are rotatably supported with respect to one another about a rotational axis and separated from one another by a bearing gap filled with bearing fluid. Associated bearing surfaces of the bearing parts form a first and a second radial bearing that are marked by grooved bearing patterns disposed on at least one bearing surface. Between the radial bearings, there is a separator gap having an enlarged gap distance compared to the bearing gap. The ends of the grooved bearing patterns of the radial bearings adjoining the separator gap penetrate into the separator gap. This measure prevents the creation of negative pressure at the ends of the grooved bearing patterns, as a result of which the formation of air bubbles is also reduced.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: December 4, 2012
    Assignee: Minebea Co., Ltd.
    Inventors: Olaf Winterhalter, Andreas Kull
  • Publication number: 20120299418
    Abstract: There is provided a bearing assembly and a motor including the same, bearing assembly including: a shaft including a first magnet provided thereon; a sleeve including a second magnet provided therein and disposed to face the first magnet so as to support the shaft; and a damping part disposed at a position at which the first and second magnets have maximum magnetic flux density in order to damp vibrations of the first and second magnets.
    Type: Application
    Filed: August 3, 2011
    Publication date: November 29, 2012
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Ki Suk Woo, Ju Ho Kim, Shin Young Cheong, Han Byul Kim
  • Patent number: 8304946
    Abstract: The present invention provides a spindle motor which has superior operating characteristics. The spindle motor includes a stationary support shaft which is fastened to a base plate, a thrust plate which is fitted over the stationary support shaft, a sleeve which is rotatably provided around the stationary support shaft and is coupled to a rotor casing, and an annular stopper which is fastened to the sleeve or the rotor casing to support the lower surface of the thrust plate and prevent the sleeve from being removed. A first fluid sealing part is formed between the stopper and the thrust plate. The spindle motor further includes an annular sealing cap which is coupled to the sleeve or the rotor casing to store fluid between the sealing cap and an upper surface of the sleeve. A second fluid sealing part is formed between the sealing cap and the stationary support shaft.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: November 6, 2012
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Chang Jo Yu, Duck Young Kim