Having Bearing Patents (Class 417/423.12)
  • Patent number: 11394275
    Abstract: A motor unit includes a motor having a motor shaft disposed along a central axis which extends in an axial direction, and a cooling unit which cools the motor, wherein the cooling unit includes a first suction port configured to suction a first refrigerant which cools the motor, a first discharge port configured to discharge the first refrigerant suctioned from the first suction port, a second suction port configured to suction a second refrigerant which cools the first refrigerant by exchanging heat with the first refrigerant, and a second discharge port configured to discharge the second refrigerant suctioned from the second suction port.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: July 19, 2022
    Assignee: NIDEC TOSOK CORPORATION
    Inventor: Yoshihisa Okuhata
  • Patent number: 11027113
    Abstract: A mechanical circulatory support device. The mechanical circulatory support device includes an inner casing defining a fluid flow path, the fluid flow path defines a longitudinal axis. A rotor is mounted within the fluid flow path and configured to rotate about the longitudinal axis. A housing is included, the inner casing and the rotor being substantially disposed within the housing. The housing having a cross-sectional shape in a plane transverse to the longitudinal axis which decreases in thickness extending from a medial position to opposite lateral positions.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: June 8, 2021
    Assignee: HeartWare, Inc.
    Inventors: Douglas Godshall, Mustafa Ertan Taskin, Jeffrey A. Larose, Nick Youker, Andre Simon
  • Patent number: 10843258
    Abstract: In accordance with one aspect of the present exemplary embodiment, a molten metal pump comprising a refractory material body defining an elongated chamber is provided. The chamber is configured to receive a shaft and impeller assembly. The chamber includes an open top through which the shaft passes and a bottom inlet. The impeller is located in or adjacent the inlet. The body further defines an elongated passage adjacent to the chamber. An opening provides fluid communication between the elongated passage and the elongated chamber. The elongated passage is in fluid communication with a discharge channel configured to direct molten metal at least substantially perpendicular to an elongated axis of the elongated chamber.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: November 24, 2020
    Assignee: Pyrotek, Inc.
    Inventors: Jason Tetkoskie, Richard S. Henderson
  • Patent number: 10753392
    Abstract: A porous gas bearing is disclosed. The porous gas bearing includes a housing having a fluid inlet and an aperture. A porous surface layer is disposed within the housing surrounding the aperture in a circumferential direction. The porous surface layer includes a plurality of segments arranged in a longitudinal direction of the aperture. The porous surface layer is in fluid communication with the fluid inlet. A damping system includes a plurality of dampers. The plurality of dampers is disposed circumferentially about the aperture. The plurality of dampers is arranged in between a first segment of the plurality of segments of the porous surface layer and a second segment of the plurality of segments of the porous surface layer.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: August 25, 2020
    Assignee: TRANE INTERNATIONAL INC.
    Inventors: Sung Hwa Jeung, Jay H. Johnson, Donald Lee Hill, Matthew Cambio
  • Patent number: 10413647
    Abstract: A mechanical circulatory support device. The mechanical circulatory support device includes an inner casing defining a fluid flow path, the fluid flow path defines a longitudinal axis. A rotor is mounted within the fluid flow path and configured to rotate about the longitudinal axis. A housing is included, the inner casing and the rotor being substantially disposed within the housing. The housing having a cross-sectional shape in a plane transverse to the longitudinal axis which decreases in thickness extending from a medial position to opposite lateral positions.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: September 17, 2019
    Assignee: HeartWare, Inc.
    Inventors: Douglas Godshall, Mustafa Ertan Taskin, Jeffrey A. Larose, Nick Youker, Andre Simon
  • Patent number: 10378555
    Abstract: An electric compressor for compressing a gas, and in particular, an electric compressor for a motor vehicle comprising a compressor wheel, an electric motor, wherein the compressor wheel can be driven by the electric motor, a control unit, wherein the electric motor can be controlled by the control unit, and a housing having at least one open end for receiving the control unit. The housing has at least one recess on the inner circumference at the open end that is designed so as to be open in the direction of the housing interior. The control unit can be inserted into the housing in such a way that it closes the open end of the housing and the recess on the inner circumference.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: August 13, 2019
    Assignee: MAGNA POWERTRAIN BAD HOMBURG GMBH
    Inventors: Wolfgang Back, Nicolai Schmolzer, Gerd Schlager
  • Patent number: 10087945
    Abstract: A centrifugal compressor (1) that includes: an auxiliary bearing (7) which supports a shaft (2), which is supported by a magnetic bearing (6), when the shaft (2) is displaced from a reference position; and a stopper (8) that is provided only for a first auxiliary bearing (7a) among the first auxiliary bearing (7a) and a second auxiliary bearing (7b), that is fixed to the shaft (2), and that restricts a movement of the shaft (2) in both directions in an axial direction by the stopper (8) being brought into contact with the first auxiliary bearing (7a).
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: October 2, 2018
    Assignee: IHI CORPORATION
    Inventors: Kazuaki Kurihara, Nobuyoshi Sakuma
  • Patent number: 9887609
    Abstract: A shaftless fan structure having an axial air slit includes: a base, including a bottom plate connected with a fasten post; a rotor set, including a impeller sleeved on the fasten post and a magnetic member, wherein the impeller is formed with a bottom surface oppositely arranged with respect to the bottom plate, and the magnetic member is disposed on the bottom surface; a rolling bearing, fastened between the fasten post and the rotor set; and a stator set, disposed on the bottom plate and including a magnetic inducing portion oppositely arranged with respect to the magnetic member, wherein an axial air slit is formed between the magnetic inducing portion and the magnetic member. Accordingly, an objective of being shaftless is achieved, and the total height can be reduced through altering the arrangement of the magnetic member and the stator set.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: February 6, 2018
    Assignee: COOLER MASTER CO., LTD.
    Inventors: Fu-Lung Lin, Shih-Wei Huang, Tsung-Wei Lin
  • Patent number: 9816562
    Abstract: A vacuum pump comprises: a ball bearing which supports a rotor; a holding section which elastically holds an outer ring of the ball bearing; and a grease which is filled between the outer ring and the holding section, the grease having a consistency of NLGI No. 1.5 or less.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: November 14, 2017
    Assignee: Shimadzu Corporation
    Inventors: Koichi Shimizu, Osamu Ashida
  • Patent number: 9790951
    Abstract: A shaftless fan includes a fan stator, a vane rotor and a rolling bearing. The rolling bearing is installed between the fan stator and the vane rotor and includes an inner ring, an outer ring, and a plurality of rolling elements rollably installed between the inner and outer rings, and the inner and outer rings of the rolling bearing are rotated in opposite direction with respect to each other, so that the vane rotor can be rotated on the fan stator to connect the fan stator with the vane rotor through the rolling bearing, so as to achieve the shaftless effect.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: October 17, 2017
    Assignee: COOLER MASTER (KUNSHAN) CO., LTD.
    Inventors: Fu-Lung Lin, Hui-Hai Yang, Tong-Xian Chen
  • Patent number: 9664547
    Abstract: A flow measurement assembly includes a coupler and a flow channel. The coupler maintains a magnet and a sensor spaced from the magnet. The flow channel is positionable between the magnet and the sensor. The flow channel includes a housing having an inlet, an outlet spaced from the inlet, and a flow conduit fluidly open to the inlet and the outlet. A ferrous body is movably disposed in the conduit. The sensor is configured to detect a frequency of a change within a magnetic field as the ferrous body travels within the flow conduit between the magnet and the sensor.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: May 30, 2017
    Assignee: Medtronic Xomed, Inc.
    Inventors: Michael Lee Koltz, Jr., Mansur Ibne Omar
  • Patent number: 9592326
    Abstract: A centrifugal blood pump for circulating blood is provided, wherein an impeller makes no contact at all with a housing and a rotating shaft and moves in a rotating manner with the impeller in a stably levitating state. Also provided is a blood pump in which the impeller rotates at high speed even when the blood pump is reduced in scale. The blood pump contains a magnet of enhanced magnetic force at the inside of a housing and at an outer peripheral surface of an impeller and providing a fixed-interval spacing on the periphery of a bearing section makes it possible to ensure a state where no contact at all is made between the housing, a shaft, and the impeller, and makes it possible to cause the impeller to rotate stably over a long period of time.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: March 14, 2017
    Assignee: MEDTECH HEART INC.
    Inventors: Setsuo Takatani, Akihisa Akao, Tadahiko Shinzi
  • Patent number: 9509190
    Abstract: The present invention relates to a downhole electrical motor elongated in a longitudinal direction, comprising a housing, a stator comprised inside the housing, a rotor comprised inside the stator rotatably connected to the stator, wherein the rotor has a locked end and a non-locked end and is locked in the locked end to avoid movement of the rotor in the longitudinal direction, and the rotor is able to move along the longitudinal direction in the non-locked end of the rotor to avoid thrust loads on the rotor due to thermal expansion of the rotor during rotor heating when the electrical motor is in operation and further comprising a locked bearing connected to the stator for supporting the rotor in the locked end and a non-locked bearing connected to the stator for supporting the rotor in the non-locked end, wherein the bearings are at least partially made from a ceramic material.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: November 29, 2016
    Assignee: WELLTEC A/S
    Inventor: Jørgen Hallundbæk
  • Patent number: 9429164
    Abstract: A rotor (2) provided for a canned motor of a wet-running centrifugal pump forms the shaft for the drive of the impeller (7) and includes at least one permanent magnet (12) which is encapsulated in a fluid-tight manner. The peripheral part of the encapsulation in the region of the at least one permanent magnet (12) forms the rotor shaft.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: August 30, 2016
    Assignee: Grundfos Management a/s
    Inventors: Oluf Kjaer, Finn Mathiesen Hoj, Helge Grann, Kare Iversen
  • Patent number: 9427510
    Abstract: A system and a method for starting a rotor of an implantable blood pump are described. For example, a blood pump system includes a rotary motor having a stator and a rotor. The rotor has permanent magnetic poles for magnetic levitation of the rotor, and the stator has a plurality of pole pieces arranged circumferentially at intervals. The blood pump system includes a controller configured to control a start phase of the rotor, wherein the start phase is prior to the rotor being positioned in a predefined geometric volume for pumping blood and wherein the start phase includes performing a rotation of the rotor by an angle larger than an angle corresponding to a quarter of an angular distance between two neighboring magnetic poles of the rotor.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: August 30, 2016
    Assignee: THORATEC CORPORATION
    Inventors: Andre Siebenhaar, Andreas Fleischli
  • Patent number: 9107997
    Abstract: A medical functional device includes at least one first fluid system for receiving at least one medical fluid, at least one first conveying device for conveying the medical fluid, at least one second fluid system for receiving at least one operating fluid, and at least one second conveying device for operating the at least first conveying device, in which the first conveying device is arranged such as to be actuated by means of the operating fluid. A treatment apparatus and a method are also described.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: August 18, 2015
    Assignee: Fresenius Medical Care Deutschland GmbH
    Inventors: Alexander Heide, Juergen Klewinghaus, Robin Partenfelder, Arne Peters, Christoph Wiktor
  • Patent number: 9074601
    Abstract: A pump for pumping molten metal includes a refractory base that can be submerged in a bath of molten metal. A refractory shaft sleeve has upper and lower end portions and is fastened to the base at the lower end portion. The shaft sleeve is enclosed at the upper end portion and includes openings at a lower end portion. The base includes an impeller chamber that is in fluid communication with the shaft sleeve and includes an outlet from the impeller chamber. The pump includes a motor. A refractory shaft extends in the shaft sleeve and is connected to the motor. A refractory impeller is connected to the shaft and is rotatable in the impeller chamber of the base. A gas source flows gas comprising inert gas into the shaft sleeve under pressure. A regulator regulates at least one of flow rate and pressure of the gas so as to avoid cavitation of the pump while outletting the gas through the openings of the shaft sleeve.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: July 7, 2015
    Inventor: Bruno Thut
  • Patent number: 9068572
    Abstract: This centrifugal blood pump apparatus includes an impeller provided in a blood chamber, a first permanent magnet provided in one surface of the impeller, and a second permanent magnet provided in an inner wall of the blood chamber, for attracting the first permanent magnet. The attractive force between the first permanent magnet and the second permanent magnet on the opening side of a sidewall of the blood chamber is set to be smaller than the attractive force between the first permanent magnet and the second permanent magnet on the opposite side of the opening. As a result, inclination of the impeller with respect to a dividing wall during pump operation can be prevented.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: June 30, 2015
    Assignee: Thoratec Corporation
    Inventors: Takayoshi Ozaki, Hiroyuki Yamada, Kenichi Suzuki, Ken Sugiura
  • Patent number: 9057376
    Abstract: A tube pump for transferring molten metal includes a refractory tube having upper and lower end portions. A motor is disposed near the upper end portion of the refractory tube. A refractory shaft extends in the refractory tube and is connected to the motor near the upper end portion of the refractory tube. A refractory impeller is connected to the shaft in the lower end portion of the refractory tube. An upper outlet extends from upper end portion of the refractory tube through which molten metal flows upon rotation of the impeller. The refractory tube is enclosed at its upper end portion. A gas source flows gas into the refractory tube at or near its upper end portion under a pressure which prevents overflow of the molten metal above the outlet. Flux may be directed into the refractory tube alone or with gas.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: June 16, 2015
    Inventor: Bruno H. Thut
  • Patent number: 9024492
    Abstract: A laser-welded joint structure between insulation frame and bearing cup of fan includes a base having a bearing cup and a stator having at least one insulation frame. The insulation frame includes a sleeve portion defining a bore axially extending therethrough. The sleeve portion is provided on an inner wall surface with at least one pressing section that radially projects into the bore to press a lower side against an upper end of the bearing cup and a bearing received therein. A portion of at least one lateral side of each pressing section that is in contact with the upper end of the bearing cup is melted by laser beam to form a laser-welded joint, so that the insulation frame and the bearing cup are integrally connected together at reduced manufacturing cost and have increased structural strength. A method of forming the laser-welded joint structure is also disclosed.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: May 5, 2015
    Assignee: Asia Vital Components Co., Ltd.
    Inventors: Bor-Haw Chang, Ping-Tsang Ho, Chin-Sung Pan, Feng Liu
  • Publication number: 20150104335
    Abstract: The internal-driven compressor having a powered compressor rotor. The internal-driven compressor includes a compressor housing including a suction port and a discharge port, an internal driver including a rotor and a stator, the rotor and the stator located within the compressor housing, the stator located radially inward of the rotor, and a powered compressor rotor including an annular body extending about a center axis, wherein the rotor is fixed to the powered compressor rotor and configured to rotate the powered compressor rotor about the center axis in response to a force imparted by the stator.
    Type: Application
    Filed: October 15, 2013
    Publication date: April 16, 2015
    Applicant: SOLAR TURBINES INCORPORATED
    Inventor: Wolfgang Faller
  • Publication number: 20150098847
    Abstract: An electric vacuum pump includes a rotary member including an armature and a commutator; a brush arranged to slide in contact with the commutator; a motor part provided with a rotary shaft integral with the rotary member; a pump part connected to the rotary shaft and configured to operate in sync with the motor part; and a bearing supporting the rotary shaft between the motor part and the pump part, the commutator and the brush being placed on a non-pump side opposite to a pump side on which the pump part is placed in an axial direction of the rotary shaft with respect to the armature.
    Type: Application
    Filed: October 2, 2014
    Publication date: April 9, 2015
    Inventors: Atsushi SUGIMOTO, Katsuhiko MAKINO, Shota YAMANAKA
  • Patent number: 8979512
    Abstract: An oil-retaining bearing fan device includes a fan base seat, at least one oil-retaining bearing and at least one magnetic member. The oil-retaining bearing is disposed in a bearing hole of the fan base seat. The oil-retaining bearing has at least one receiving hole for receiving the magnetic member therein. The magnetic member serves to apply a magnetic attraction force to a shaft of the fan device to make the shaft quickly restore to its optimal operation position so as to reduce wear and lower the noises and vibration of the fan device in operation. Therefore, the lifetime of the fan device can be prolonged.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: March 17, 2015
    Assignee: Asia Vital Components (Chengdu) Co., Ltd.
    Inventors: Bor-Haw Chang, Shu-Fen Liu
  • Patent number: 8974197
    Abstract: The invention relates to a system and method of providing a compressor mechanism having a front housing, center housing and rear housing. The center housing includes an integrated compressor bearing support and compressor base surface that divides the housing into cantilevered wall sections. The system and method constructed in this manner provides a compact structure for an electric compressor with the ability to reduce noise vibration harshness.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: March 10, 2015
    Assignee: Halla Visteon Climate Control Corporation
    Inventors: Timothy Raymond VanBritson, Michael Gregory Theodore, Jr., Kanwal Bhatia, Scott Wenzel, Brian Robert Kelm
  • Patent number: 8959920
    Abstract: An assembly or system is provided for selectively regulating journal bearing lubrication between at least first and second levels in an aircraft engine. A high pressure pump includes movable portions at least in part supported by a journal bearing. A selector valve is configured to selectively supply lubrication flow to the journal bearing. In addition, a relief valve is configured to receive a signal from the selector valve defining a pressure level at which the relief valve should relieve pressure.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: February 24, 2015
    Assignee: Eaton Corporation
    Inventor: Martin A. Clements
  • Publication number: 20150050170
    Abstract: A magnetic bearing device comprises a first carrier generation section generating a first carrier signal; a second carrier generation section generating a second carrier signal whose phase differs by (?/2+?) radian from the phase of the first carrier signal; a first demodulation section performing demodulation by sampling the first modulated signal at sampling timing shifted by a phase ? from timing at which the first carrier signal becomes a peak; a second demodulation section performing demodulation by sampling the second modulated signal at sampling timing shifted by a phase (??) from timing at which the second carrier signal becomes a peak; and a controller controlling current in each of the first radial electromagnet and the second radial electromagnet, based on a result of the demodulation by each of the first demodulation section and the second demodulation section.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 19, 2015
    Inventor: Junichiro KOZAKI
  • 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
  • Publication number: 20150017031
    Abstract: A pump assembly includes an electric drive motor having a stator and a permanent magnet rotor, at least one impeller connected to the rotor via a rotor shaft, a thrust bearing accommodating axial forces acting on the impeller and rotor shaft in operation, and at least one radial bearing arranged on the rotor shaft. The rotor and stator are designed such that a magnetic axial force, acting in the direction of the rotation axis of the rotor and acting on the rotor in the direction of the inflow direction into the impeller, is produced between the rotor and the stator. The rotor shaft and rotor are mounted displaceably in the axial direction relative to the stator, and with an axial displacement of the rotor shaft in the inflow direction into the impeller, the bearing surfaces of the radial bearing lying opposite one another at least partly disengage.
    Type: Application
    Filed: December 19, 2012
    Publication date: January 15, 2015
    Applicant: Grundfos Holding a/s
    Inventor: Thomas Blad
  • Patent number: 8920141
    Abstract: A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a pump wheel. A rotor shaft is arranged at the pump wheel. The rotor shaft is rotatable and radially supported. A driving wheel is rotatable, radially supported is driven by the internal combustion engine. A connecting device is connects the rotor shaft with the driving wheel so as to be rotatably fixed. A first roller bearing comprises a separate outer bearing ring. The separate outer bearing is directly fixed to a pump frame body. The first roller bearing directly radially supports the rotor shaft or the driving wheel. A separate bearing fixation structure axially pushes the separate outer bearing ring of the first roller bearing so as to be clearance-free against the pump frame body so that the separate bearing fixation structure is directly fixed to the pump frame body.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: December 30, 2014
    Assignee: Pierburg Pump Technology GmbH
    Inventors: Jean-Michel Durand, Pierre Reininger, Laurent Finidori
  • Publication number: 20140377104
    Abstract: A pump assembly has an electric drive motor which is designed as a canned motor which has a bearing (22) in the interior of motor can (14), on which a motor shaft (20) is supported. The bearing (22) has an outer diameter that is smaller than an inside diameter of the motor can (14) and the bearing (22) in the interior of the motor can (14) is supported on a bearing holder (24) which has multiple steps (40) extending traversely to an inner circumference of the motor can (14).
    Type: Application
    Filed: December 14, 2012
    Publication date: December 25, 2014
    Inventor: Kåre Iversen
  • Publication number: 20140377105
    Abstract: A pump assembly includes a pump housing (2) and a stator housing (16), which is connected to the pump housing (2) and in which a wet-running electric motor with a can (18, 18?) is arranged. A plate-like bearing carrier (26, 26?) of sheet-material is arranged between the pump housing and the stator housing (16). The bearing carrier (26, 26?) includes a centering surface (40, 40?) in a manner distanced to its free peripheral edge, said centering surface coming into bearing contact on a corresponding contact surface (42) of the pump housing (2) in a manner such that the bearing carrier (26, 26?) with the can (18, 18?) is centered relative to the pump housing (2).
    Type: Application
    Filed: December 14, 2012
    Publication date: December 25, 2014
    Inventors: Finn Mathiesen Høj, Tom Eklundh Larsen
  • Publication number: 20140377106
    Abstract: An electromagnet has a core with a pair of magnetic poles, a primary coil wound around the core, and a series circuit of a first auxiliary coil wound around the first magnetic pole of the core, a second auxiliary coil wound around the second magnetic pole of the core, and capacitors, and is connected in parallel to the primary coil and the series circuit. The first and the second magnetic poles are each divided into a plurality of split magnetic poles. The first auxiliary coil is composed of a plurality of split auxiliary coils wound around the respective pole in the plurality of split magnetic poles of the first magnetic pole so that the mutual inductance with the primary coil becomes zero. The second auxiliary coil is composed of a plurality of split auxiliary coils wound around the respective pole in a plurality of split magnetic poles of the second magnetic pole so that the mutual inductance with the primary coil becomes zero.
    Type: Application
    Filed: December 21, 2012
    Publication date: December 25, 2014
    Inventors: Junichiro Kozaki, Yoshihiro Nagano
  • Patent number: 8915721
    Abstract: A mini-fan has a drive motor having an external rotor (222) and an internal stator (244). The external rotor (222) is equipped with a rotor shaft (234) that has a necked down portion (258) in the region of its free end (235). The mini-fan (216) has a bearing tube (238) on whose outer side the internal stator (244) is mounted and in whose interior is arranged a bearing arrangement (236) in which the rotor shaft (234) is rotatably supported. A closure arrangement (262) serves to close off the bearing tube (238) in liquid-tight fashion at one end, and is equipped, in the region of the necked down portion (258) of the rotor shaft (234), with at least one resilient securing member (260) that engages into that necked down portion (258) and secures the rotor shaft (234) against being pulled out of the bearing arrangement (236).
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: December 23, 2014
    Assignee: EBM-Papst St. Georgen GmbH & Co. KG
    Inventors: Wolfgang Arno Winkler, Nils Rapp
  • Publication number: 20140371919
    Abstract: A centrifugal compressor for compressing a refrigerant vapour in a refrigeration cycle. The compressor comprises an impeller drive shaft (28) supported by first and second radial bearings (32) for rotation within the compressor housing and an impeller assembly including at least one centrifugal impeller wheel mounted on the impeller drive shaft to rotate with the impeller drive shaft. The first and second radial bearings are hydrodynamic fluid bearings in which the bearing fluid is the refrigerant vapour. The compressor further comprising a conduit (36) for supplying a portion of the refrigerant vapour from the impeller assembly to the first and second fluid bearings.
    Type: Application
    Filed: December 20, 2012
    Publication date: December 18, 2014
    Inventor: Michael Creamer
  • Publication number: 20140363321
    Abstract: A magnetic bearing body supports a rotating shaft using a combined electromagnetic force of a pair of control electromagnets without contact. A controller detects a control index value based on a first coil current passed through a coil of a first control electromagnet of the pair of control electromagnets which generates an electromagnetic force in the same direction as that of a load exerted on the rotating shaft, the control index value being an index of the degree of margin for error in control depending on a value of the first coil current. And the controller controls a middle value of a pair of coil currents passed through the respective corresponding coils of the pair of control electromagnets so that the control index value approaches a predetermined target index value.
    Type: Application
    Filed: December 19, 2012
    Publication date: December 11, 2014
    Inventors: Atsushi Sakawaki, Yuji Nakazawa, Yusuke Irino, Naoya Yamashita
  • Patent number: 8905729
    Abstract: Rotodynamic pumps having an inner drive permanent magnet coupling disposed inside an impeller are provided. The impeller has a casing having a pumping region generally in a pumping plane that is perpendicular to the rotational axis of the impeller and aligned with a permanent magnet coupling that includes outer magnets that are connected to the impeller and at least partially aligned with the pumping region of the impeller, and inner magnets that are connected to an inner magnet ring and are axially aligned with the outer magnets. A canister is sealed to the casing and separates the outer magnets from the inner magnets.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: December 9, 2014
    Assignee: PeopleFlo Manufacturing, Inc.
    Inventors: William R. Blankemeier, Radosav Trninich
  • Patent number: 8905728
    Abstract: Rotodynamic pumps having an inner drive permanent magnet coupling disposed inside an impeller are provided. The impeller has a casing having a pumping region generally in a pumping plane that is perpendicular to the rotational axis of the impeller and aligned with a permanent magnet coupling that includes outer magnets that are connected to the impeller and at least partially aligned with the pumping region of the impeller, and inner magnets that are connected to an inner magnet ring and are axially aligned with the outer magnets. A canister is sealed to the casing and separates the outer magnets from the inner magnets.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: December 9, 2014
    Assignee: Peopleflo Manufacturing, Inc.
    Inventors: William R. Blankemeier, Radosav Trninich
  • Patent number: 8899945
    Abstract: One aspect of the invention provides a centrifugal compressor unit (1) comprising a first motor (3), at least one compressor (2) comprising a drive shaft (9) driven by the rotor (12) of the first motor (3) and a set of impellers (5, 6, 7, 8) mounted on the drive shaft (9). The first motor (3) and the compressor (2) are mounted in a gas-tight common housing (26) operated by the compressor unit (1). The rotor (12) of the first motor (3) and the drive shaft (9) are connected by a flexible coupling (24) placed in the housing (26). The compressor unit includes a second motor (4) that is placed in the housing and of which the rotor (13) is connected to the drive shaft (9) by a second flexible coupling (25).
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: December 2, 2014
    Assignee: Thermodyn
    Inventor: Pierre Laboube
  • Patent number: 8894387
    Abstract: An axial flow pump for a blood circulating pump for the circulation of blood, the rotor the rotor being constructed and arranged to impel blood in a downstream direction upon rotation of the rotor about its axis in a forward circumferential direction. The rotor is provided with hydrodynamic thrust bearing surfaces, each such thrust bearing surface being constructed and arranged to apply a hydrodynamic force to the rotor with a component of the force in the downstream direction upon rotation of the rotor in the forward circumferential direction.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: November 25, 2014
    Assignee: HeartWare, Inc.
    Inventor: Daniel G. White
  • Publication number: 20140341764
    Abstract: A wet rotor pump with an axial flux motor that includes a stator, a containment shell, and a rotor. The stator and the containment shell are arranged in a dry zone while the rotor on an impeller is arranged in a wet zone. The wet rotor pump further has an inlet line for a fluid to be pumped by the impeller, and a bearing for the impeller. Said bearing is arranged at one end of the inlet line and supports the impeller in such a way that the impeller has an axial degree of freedom. The inlet line extends through the stator, the containment shell, and the bearing in the axial direction.
    Type: Application
    Filed: January 17, 2013
    Publication date: November 20, 2014
    Applicant: YASA MOTORS POLAND SP. Z O.O.
    Inventor: Markus Müller
  • Patent number: 8888472
    Abstract: Provided is a waterproof fluid pump including: a motor that is accommodated in a first case and comprises a stator and a rotor, to thus generate a rotating torque; an impeller that is accommodated in a pump housing that is mounted in the first case and that receives the rotating torque of the motor to thus pump fluid; a support shaft to which the rotor and the impeller are rotatably supported and that is fixed to the first case; a first magnet that is fixed to the rotor and is rotated with the rotor; and a second magnet that is fixed to the impeller and is disposed facing the first magnet and that has opposite polarity to that of the first magnet. Thus, fluid may be fundamentally prevented from being introduced into the inside of the motor.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: November 18, 2014
    Assignee: Amotech Co., Ltd.
    Inventor: Byoung Soo Kim
  • Patent number: 8882477
    Abstract: A device for pumping blood, includes a housing having a distal end adapted to be coupled to a catheter, a proximal end having an outlet, and a tubular body extending between the distal and proximal ends along an axis. A rotor is rotatably disposed within the housing. A first magnetic bearing is operative to levitate the rotor along the axis within the housing. A second magnetic bearing controls a rotational frequency of the rotor. A third magnetic bearing controls a radial position of the rotor.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 11, 2014
    Assignee: CircuLite, Inc.
    Inventors: Bryan Patrick Fritz, IV, Martin David Simon
  • Publication number: 20140314599
    Abstract: The present invention relates to a novel bearing arrangement for a centrifugal pump. The bearing arrangement comprises a thrust bearing (50) arranged closer to the end (42?) of the shaft (42) carrying the rotor (44), the thrust bearing (50) being selectable between a four-point contact ball bearing for heavy-duty applications and a single row contact ball bearing for light-duty applications.
    Type: Application
    Filed: April 18, 2014
    Publication date: October 23, 2014
    Applicant: Sulzer Pumpen AG
    Inventor: Heikki Manninen
  • Patent number: 8851864
    Abstract: Vibration of a rotor positioned within a stator of an electric motor of an electric submersible pump assembly is attenuated in a first embodiment by adjusting the length of the rotor to position rotor bearings supporting the rotor within the stator at locations of low amplitude vibration. In a second embodiment, hydraulic pressure is applied to a fluid chamber supporting a thrust bearing that supports the rotor. When hydraulic fluid pressure is applied, the thrust bearing and the rotor move axially. Thus, moving the rotor bearings away from areas of high amplitude vibration of the rotor. In a third embodiment, a sliding mass affixed to the motor is moved in response to vibration of the motor. Movement of the sliding mass changes the vibration profile of the motor.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: October 7, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Carlos Prieto, Larry Parmeter
  • Patent number: 8845308
    Abstract: A thrust module and a seal module for use in an electric submersible pump assembly is provided. The thrust module provides increased lubrication and heat dissipation while increasing sealing redundancies within the module. The thrust module includes a thrust bearing that absorbs thrust from the primary pump. A circulation pump assembly is coupled to the thrust bearing to circulate fluid through the thrust bearing and dissipate heat generated in the thrust bearing through a plurality of fins formed on an exterior surface of the circulation pump assembly. The seal module has labyrinth discs positioned within the seal module that inhibit fluid flow through the seal module. The seal module also includes check valves that release fluid from and allow fluid into the seal module at predetermined pressures. The sealing assembly is interposed between the thrust bearing and a primary pump of the electric submersible pump.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: September 30, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Steven K. Tetzlaff, Chad A. Craig
  • Patent number: 8821136
    Abstract: A supercharger includes a centrifugal compressor having an impeller, a rotational shaft coupled to the impeller, a motor having a stator and a rotor housed in a casing, and a journal air bearing supporting the rotational shaft. The journal air bearing includes a hollow cylindrical member having an inner space therein and a heat transfer member fitted in the inner space. The heat transfer member is made of a material which is less rigid and has a greater coefficient of thermal conductivity than the hollow cylindrical member. The impeller radiates heat transferred through the heat transfer member into ambient air.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: September 2, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Masaaki Komatsu, Tetsuya Takezawa, Junji Takado, Toru Kamiya
  • Patent number: 8807968
    Abstract: Various “contactless” bearing mechanisms including hydrodynamic and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. In one embodiment, a pump apparatus includes a pump housing defining a pumping chamber. The housing has a spindle extending into the pumping chamber. A spindle magnet assembly includes first and second magnets disposed within the spindle. The first and second magnets are arranged proximate each other with their respective magnetic vectors opposing each other. The lack of mechanical contact bearings enables longer life pump operation and less damage to working fluids such as blood.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: August 19, 2014
    Assignee: Thoratec Corporation
    Inventors: Richard K. Wampler, David M. Lancisi
  • Patent number: 8807967
    Abstract: A blower fan includes a shaft including an outer circumferential surface, a rotor magnet arranged to rotate about a rotation axis together with the shaft, a stator arranged radially outwards of the rotor magnet in an opposing relationship with the rotor magnet, a substantially cylindrical holder unit arranged to rotatably support the shaft through a bearing, and an impeller arranged to rotate together with the shaft. The bearing includes a pair of axially spaced-apart bearing units. The rotor magnet and the stator are arranged between the bearing units. The bearing units and the stator are held on an inner circumferential surface of the holder unit.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: August 19, 2014
    Assignee: Nidec Corporation
    Inventors: Hidenobu Takeshita, Tomotsugu Sugiyama
  • Patent number: 8807920
    Abstract: A pump assembly with a rotatable rotor shaft (10), wherein the rotor shaft (10) includes at least one axial bearing (36, 40) and a radial bearing (30, 32), which are integrated into a common bearing assembly (16).
    Type: Grant
    Filed: October 18, 2008
    Date of Patent: August 19, 2014
    Assignee: Grundfos Management a/s
    Inventors: Helge Grann, Alfred Lisbjerg Pedersen