Stator Within Armature Patents (Class 417/354)
  • Publication number: 20030072656
    Abstract: An ultra-thin pump of the present invention includes a ring-shaped impeller including many vanes arranged along its outer region and a rotor magnet at its inner region, a motor stator provided in a space encircled by an inner peripheral surface of the rotor magnet of the impeller, and a pump casing that includes an suction port, a discharge port and a cylinder disposed between the motor stator and the rotor magnet and houses the impeller. The impeller is rotatably supported by the cylinder. A cooling system of the present invention includes a cooling device for cooling a heat-producing device by heat exchange using coolant, a radiator for removing heat from the coolant, and the ultra-thin pump for circulating the coolant. The ultra-thin pump is simple in structure, operates efficiently and can be manufactured at low cost, and the cooling system is thin in structure and performs efficient cooling.
    Type: Application
    Filed: September 23, 2002
    Publication date: April 17, 2003
    Inventors: Kyo Niwatsukino, Yoichi Shukuri, Yoshimitsu Aizono, Shigeru Narakino
  • Publication number: 20030068238
    Abstract: A cooling fan dust structure has provided on the end of the fan blade hood a recess that mutually forms an overcut height difference with a flange protruding from the peripheral of a motor base so to prevent the airflow carrying dust an easy ingression and even keep off the flying dust from entering into the spindle as the fan blade unit rotates.
    Type: Application
    Filed: October 9, 2001
    Publication date: April 10, 2003
    Inventor: Hsin Mao Hsieh
  • Publication number: 20030068237
    Abstract: A cooling fan dust guard has provided on the inner side of fan blades ribs and recess that mutually form an overcut height difference with a bushing opening so to prevent the airflow carrying dust an easy ingression and even keep off the flying dust from entering into the spindle.
    Type: Application
    Filed: October 5, 2001
    Publication date: April 10, 2003
    Inventor: Hsieh Hsin Mao
  • Publication number: 20030059318
    Abstract: A cooling fan has a housing. A stator is securely mounted in the housing and has a coil, an upper pole sheet and a lower pole sheet coaxially provided at a top and a bottom of the coil respectively. A circuit board is provided beneath the lower pole sheet. An oil-retaining bearing is mounted in the stator. A rotator is received in the housing and has a cap covering the stator. A spindle is formed at the center of the cap and inserted through the oil-retaining bearing. A dustproof disk is provided between the circuit board and the lower pole sheet and is received in the cap of the rotator. A gap between the circuit board and the cap is sealed by the dustproof disk, and dust will not enter into the rotator to block the oil-retaining bearing.
    Type: Application
    Filed: September 24, 2001
    Publication date: March 27, 2003
    Inventor: Hsin-Mao Hsieh
  • Patent number: 6533559
    Abstract: A heat dissipation fan has a casing, two fans and multiple stationary blades. The fans are co-axially rotatably mounted in the casing. Multiple rotating blades are arranged around the outer periphery of each fan. The stationary blades are secured in the casing and between the rotating blades of the two fans. The angle of the rotating blades on both of the fans is the same. The angle of the stationary blades is perpendicular to that of the passing rotating blades. Accordingly, the airflow generated by the dissipation fan will be enhanced with the multiple layers of rotating blades. The stationary blades reverse the direction of the airflow. The dissipating effect of the dissipation fan is further increased.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: March 18, 2003
    Inventor: Hsin-Mao Hsieh
  • Publication number: 20030039560
    Abstract: A fan in which, on one end of the motor shaft 6 a stepped portion 19 having a small diameter is formed, on which a central portion of the motor yoke 11 is press-fitted and fixed by caulking, thereby the motor yoke is mounted directly on the shaft 6. By such a structure, the conventional boss between the shaft 6 and the motor yoke 11 can be omitted and the structure can be simplified.
    Type: Application
    Filed: October 15, 2002
    Publication date: February 27, 2003
    Applicant: Minebea Co., Ltd.
    Inventors: Kiyoshi Shinokubo, Shoichi Takei
  • Patent number: 6517326
    Abstract: In a conventional blowing apparatus, vibration is increased depending upon a combination of rotor magnetic poles, the number of stator salient poles and blades of a fan. In a blowing apparatus comprising a stator having a core including a M-number of salient poles, and a rotor having permanent magnets having a P-number of magnetic poles rotatably disposed such as to be opposed to magnetic pole surfaces of the stator, the stator and the rotor, in combination, forming a motor for rotating a fan having a N-number of blades, mN≠nM or mN≠nP is satisfied. With this feature, a synergism between vibration generated by cogging torque of the motor and vibration generated by rotation of the fan is moderated, and vibration and noise are reduced.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: February 11, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyasu Fujinaka, Shizuka Yokote, Yukihiro Okada
  • Patent number: 6511299
    Abstract: A fan in which, on one end of the motor shaft 6 a stepped portion 19 having a small diameter is formed, on which a central portion of the motor yoke 11 is press-fitted and fixed by caulking, thereby the motor yoke is mounted directly on the shaft 6. By such a structure, the conventional boss between the shaft 6 and the motor yoke 11 can be omitted and the structure can be simplified.
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: January 28, 2003
    Assignee: Minebea Co., Ltd.
    Inventors: Kiyoshi Shinokubo, Shoichi Takei
  • Patent number: 6511300
    Abstract: An impeller arrangement in which adjacent blades (ventilating surfaces) are overlapped with each other as viewed in the axial direction is realized easily and cost-effectively even in a synthetic-resin-molded product. In an impeller for an axial flow type blower driven by an outer rotor type motor which is integrated to a rotatably supported shaft and a motor yoke to be rotated about the shaft around an outer side of a stator together with the motor yoke for ventilation, the impeller comprises a plurality of impellers (divided impellers, for example, a front side divided impeller and a rear side divided wheel), so that each of the divided impellers can be molded by a simple molding method using axially coupled type metal dies.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: January 28, 2003
    Assignee: Minebea Co., Ltd.
    Inventor: Shuichi Otsuka
  • Publication number: 20020192087
    Abstract: A heat dissipation fan that has a casing, a stator and a fan. The stator is pressed onto a sleeve secured in the casing. The stator has a coil and two pole disks respectively abutting opposite sides of the coil. A low-friction member is mounted in the sleeve. The fan is rotatably mounted in and around the stator inside the casing. A permanent magnet is mounted in the fan to make the fan a rotor. A shaft securely attached to the fan extends from the fan and passes through the low-friction member. The permanent magnet has an axial height shorter than that of the coil of the stator. The permanent magnet has a horizontal central line axially displaced from a horizontal central line of the coil of the stator. Accordingly, the fan with the shaft will not move axially during the operation of the heat dissipation fan. Power loss will be avoided.
    Type: Application
    Filed: June 14, 2001
    Publication date: December 19, 2002
    Inventor: Hsin-Mao Hsieh
  • Publication number: 20020187059
    Abstract: The invention relates to an electric fan, in particular, for motor vehicles, comprising an electric drive motor, a fan wheel coupled with the drive motor, and an electronic control unit for controlling the motor. In order to make the electric fan structurally more simple and more cost-effective to assemble, it is proposed that the drive motor and the control unit be arranged in a common housing, and that the housing have air vents for passage of a flow of cooling air generatable by the fan wheel, and a heat sink of the control unit be arranged at at least one air vent.
    Type: Application
    Filed: May 6, 2002
    Publication date: December 12, 2002
    Applicant: AFL Germany Electronics GmbH
    Inventors: Matthias Gold, Dirk Herke, Frank Hoenig
  • Publication number: 20020180285
    Abstract: A fan assembly is described having a circular arrangement of fins located around a circular arrangement of blades. Air leaving tips of the blades has high velocity to efficiently break down a convection barrier layer on each of the fins. By breaking down the convection barrier layer, more heat is transferred from the fins to the air. An additional set of blades is located around the fins and an additional set of fins is located around the additional set of blades. Each fin is attached to a respective turn of a coiled heat pipe. The heat pipe has an end which is thermally connected to a processor of a computer.
    Type: Application
    Filed: May 30, 2001
    Publication date: December 5, 2002
    Inventor: Sridhar V. Machiroutu
  • Patent number: 6488483
    Abstract: A heat dissipation fan that has a casing, a stator and a fan. The stator is pressed onto a sleeve secured in the casing. The stator has a coil and two pole disks respectively abutting opposite sides of the coil. A low-friction member is mounted in the sleeve. The fan is rotatably mounted in and around the stator inside the casing. A permanent magnet is mounted in the fan to make the fan a rotor. A shaft securely attached to the fan extends from the fan and passes through the low-friction member. The permanent magnet has an axial height shorter than that of the coil of the stator. The permanent magnet has a horizontal central line axially displaced from a horizontal central line of the coil of the stator. Accordingly, the fan with the shaft will not move axially during the operation of the heat dissipation fan. Power loss will be avoided.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: December 3, 2002
    Inventor: Hsin-Mao Hsieh
  • Patent number: 6471494
    Abstract: A vacuum pumping apparatus includes a pump housing 1 and a motor housing 8. The housings 1 and 8 are fastened together so as to be a sealed structure by O-rings 51-58 interposed therebetween. A shaft 17 of a driving device 70 and a driving shaft 15 carrying a rotor 2a are detachably connected via a coupling 91. During operation of the apparatus, a rotor chamber 41 in the pump housing 1 and a motor chamber 43 in the motor housing 8 are equalized in pressure, which requires no mechanical seal therebetween. The coupling 91 facilitates easy removal or detachment of a motor part B from a pump part A, which results in convenient maintenance of the pump part A.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: October 29, 2002
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Atsuyuki Miura, Koichi Nakayama, Yoshihiro Naito, Toyoki Furuhashi
  • Patent number: 6457953
    Abstract: An axial flow fan for cooling electronic components comprising a plurality of blades for cooling electronic components wherein the blades comprise a plurality of specially designed airfoil sections, each section having along substantially the entire length thereof, a cross-sectional shape characterized by a maximum thickness located substantially constantly between about 16% chord to about 23% chord and a maximum camber located substantially constantly between about 40% chord to about 51% chord. The circuitry, housing, and blades are designed so that the axial width of the axial fan is decreased while maintaining performance parameters and design constraints.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: October 1, 2002
    Assignee: NMB (USA) Inc.
    Inventors: Phillip James Bradbury, Phep Xuan Nguyen, Chalmers R. Jenkins, Jr.
  • Patent number: 6447272
    Abstract: In a blower in which an impeller (8), a motor yoke (11) and the like are attached to a shaft which is supported by bearings (4), (5), and a stator core (16) is arranged inside of the motor yoke (11), an annular groove (19) is provided at one end portion of the shaft (6) around its periphery and a central portion of the motor yoke (11) that is formed in a cup-shape is press-fitted and fixed to the annular groove (19). Since a zinc die-cast-made boss that has been conventionally needed may be dispensed with, the structure may be simplified and the assembling work may be performed without fail.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: September 10, 2002
    Assignee: Minebea Co., Ltd.
    Inventor: Mitsugu Tsuchiya
  • Patent number: 6447265
    Abstract: A rotary pump for pumping fluids through a patient having a housing with an internal region, a stator member and an impeller positioned within the housing and having impeller blades, wherein the impeller is magnetically suspended and rotated, and wherein the geometric configuration of the rotary pump is sized and proportioned to minimize stagnant and traumatic fluid flow within the rotary pump. The plurality of magnetic impeller blades are preferably rare earth, high-energy-density magnets selected from the group consisting of samarium cobalt and neodymium-iron-boron alloy.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: September 10, 2002
    Assignees: The University of Pittsburgh, The United States of America as represented by the United States National Aeronautics and Space Administration
    Inventors: James F. Antaki, Bradley Paden, Gregory Burgreen, Nelson Groom
  • Patent number: 6406274
    Abstract: A heat dissipation device includes a rotor, a plurality of centrifugal blades provided around the rotor, a stator provided inside the rotor for driving the rotor to rotate, and a base provided under the rotor and the stator without enclosing the rotor. The base includes a central portion connected with the stator, and a plurality of extension portions extending from the central portion to the outside. A plurality of holes are formed at a side of each of the plurality of extension portions away from the central portion, respectively.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: June 18, 2002
    Assignee: Delta Electronics, Inc.
    Inventors: Kuo-cheng Lin, Yu-huang Huang, Ming-shi Tsai, Wen-shi Huang
  • Patent number: 6400053
    Abstract: A D.C brushless motor includes a housing, a circuit board, a balance plate, a stator, a rotor, and a magnetically non-inductive member. The housing includes a compartment, and a bottom wall that defines the compartment includes a tube seat formed thereon for engaging with an axle tube of the stator, which, in turn, receives a rotational shaft of the rotor. The rotor includes a permanent magnet mounted to an inner periphery thereof. The balance plate includes a fixing hole so as to be mounted around the axle tube of the stator, wherein there is a gap between an inner periphery defining the fixing hole and the axle tube. The balance plate is made of magnetically inductive material such that the balance plate and the permanent magnet attract each other. The magnetically non-inductive member avoids contact between the pole plate of the stator and the balance plate.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: June 4, 2002
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventor: Alex Horng
  • Patent number: 6394768
    Abstract: A DC brushless fan is reflow-soldered to a substrate, efficiently and densely mounted on the substrate, and the fan and its coupling section are provided with a high impact resistance, thereby providing a small and reliable piece of equipment having a high productivity. The DC brushless fan includes a housing having a bottom surface, a side surface, and a top surface. The bottom surface is located adjacent and opposite to a substrate of a piece of equipment, and provided on the bottom surface side are a plurality of lands for being mechanically or electrically soldered to the substrate of the equipment. A stator, a bearing device, and a rotor are provided inside the housing. The stator has a stator core and a coil wound around the stator cone, and the rotor has a magnet and is supported by the bearing device. The fan further includes a fan blade rotating with the rotor.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: May 28, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiaki Fukuda, Takamasa Yamaguchi
  • Patent number: 6386837
    Abstract: A miniature heat dissipating fan includes a housing and an impeller. A circuit board and a stator bobbin, a balance plate, and an axle support. The axle support has an axle or a bearing member mounted thereto. The impeller has a bearing member or an axle and arranged in a manner that the axle and the bearing member support each other. The impeller further includes a ring magnet wherein the ring magnet and the balance plate attract each other.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: May 14, 2002
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventor: Alex Horng
  • Patent number: 6386276
    Abstract: A heat-dissipating device for dissipating internal heat generated from the heat-dissipating device is provided. The heat-dissipating device includes a motor having a rotator and a stator for causing the rotator to rotate, and a fan connected with the rotator and having a hub having a slot and a plurality of holes thereon for rotating and dissipating the heat.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: May 14, 2002
    Assignee: Delta Electronics, Inc.
    Inventors: Chang Shun Chen, Kuo-Cheng Lin, Wen-Shi Huang
  • Patent number: 6386839
    Abstract: A high performance radiator fan includes an axial fan and a centrifugal fan. The axial fan has a plurality of arched-shaped blades located between a protrusive circular hub and a closed motor shell for drawing airflow from the upper end of the axial fan through the curved blades into the centrifugal fan. The airflow is converged and spun out at high speed and great volume by centrifugal force to enhance heat dissipation efficiency.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: May 14, 2002
    Inventor: Wen-Hao Chuang
  • Patent number: 6379126
    Abstract: The invention enhances a joined portion between a bearing holder and a stator core in a blower. In the blower including a stator core attached to the outer circumference of a bearing holder, a setscrew for impeding the stator core from being pulled out is interposed between the bearing holder and the stator core. The setscrew is used for fixing in place of adhesives which is used in conventional art, ensuring the joining between the bearing holder and the stator core as well as facilitating the disassembling work.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: April 30, 2002
    Assignee: Minebea Co., Ltd.
    Inventor: Mitsuo Konno
  • Publication number: 20020028146
    Abstract: An impeller arrangement in which adjacent blades (ventilating surfaces) are overlapped with each other as viewed in the axial direction is realized easily and cost-effectively even in a synthetic-resin-molded product. In an impeller for an axial flow type blower driven by an outer rotor type motor which is integrated to a rotatably supported shaft and a motor yoke to be rotated about the shaft around an outer side of a stator together with the motor yoke for ventilation, the impeller comprises a plurality of impellers (divided impellers, for example, a front side divided impeller and a rear side divided wheel), so that each of the divided impellers can be molded by a simple molding method using axially coupled type metal dies.
    Type: Application
    Filed: August 1, 2001
    Publication date: March 7, 2002
    Applicant: MINEBEA CO., LTD.
    Inventor: Shuichi Otsuka
  • Publication number: 20020025261
    Abstract: A centrifugal fan capable of exhibiting enhanced waterproof performance without using a resin mold while being simplified in structure. Air is sucked from one axial side of a revolving shaft of an electric motor and discharged in a radial direction of the revolving shaft. A second side wall of a casing and a wall of a blade support of an impeller have opposite surface portions arranged opposite to each other in an axial direction of the revolving shaft, respectively. The opposite surface portions are formed into a configuration which permits the opposite surface portions to cooperate with each other to provide a labyrinth structure for preventing water from intruding into a space defined between a cup-like member and the second wall from an outside in the radial direction of the revolving shaft. A first side wall and the second side wall are formed with drainage through-holes.
    Type: Application
    Filed: August 21, 2001
    Publication date: February 28, 2002
    Inventors: Naruhiko Kudo, Kesatsugu Watanabe
  • Patent number: 6332758
    Abstract: Air-bearing fan includes a dust-proof cover, a fan blade structure, a magnet, a stator, a sleeve, an electronic circuit board, a housing and a thrust disk. While the fan blade structure is rotating, air can be induced into a ring-shaped gap so that an air-bearing is formed. And, air is also induced into a thrust gap and forms a thrust bearing. Therefore, this invention significantly reduces the noise and increases the fan's rotating speed, fan capacity and life.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: December 25, 2001
    Assignee: Hsin-Mao Hsieh
    Inventors: Ping-Huey Tang, Chi-Wei Tien, Hsin-Pu Chen
  • Publication number: 20010043869
    Abstract: A miniature heat dissipating fan includes a housing and an impeller. A circuit board and a stator bobbin, a balance plate, and an axle support. The axle support has an axle or a bearing member mounted thereto. The impeller has a bearing member or an axle and arranged in a manner that the axle and the bearing member support each other. The impeller further includes a ring magnet wherein the ring magnet and the balance plate attract each other.
    Type: Application
    Filed: June 21, 2001
    Publication date: November 22, 2001
    Applicant: Sunonwealth Electric Machine Industry Co. Ltd.
    Inventor: Alex Horng
  • Publication number: 20010031209
    Abstract: In a conventional blowing apparatus, vibration is increased depending upon a combination of rotor magnetic poles, the number of stator salient poles and blades of a fan. In a blowing apparatus comprising a stator having a core including a M-number of salient poles, and a rotor having permanent magnets having a P-number of magnetic poles rotatably disposed such as to be opposed to magnetic pole surfaces of the stator, the stator and the rotor, in combination, forming a motor for rotating a fan having a N-number of blades, mN≠nM or mN≠nP is satisfied. With this feature, a synergism between vibration generated by cogging torque of the motor and vibration generated by rotation of the fan is moderated, and vibration and noise are reduced.
    Type: Application
    Filed: April 13, 2001
    Publication date: October 18, 2001
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Hiroyasu Fujinaka, Shizuka Yokote, Yukihiro Okada
  • Publication number: 20010031210
    Abstract: A blood pump preferably has a magnetically suspended rotor that rotates within a housing. The rotor may rotate about a stator disposed within the housing. Radial magnetic bearings may be defined within the stator and the rotor in order to suspend the rotor. The radial magnetic bearings may be passive magnetic bearings that include permanent magnets disposed within the stator and the rotor or active magnetic bearings. The pump may further include an axial magnetic bearing that may be either a passive or an active magnetic bearing. A motor that drives the rotor may be disposed within the housing in order to more easily dissipate heat generated by the motor. A primary flow path is defined between the rotor and the stator, and a secondary flow path is defined between the stator and the rotor. Preferably, a substantial majority of blood passes through the primary flow path.
    Type: Application
    Filed: April 24, 2001
    Publication date: October 18, 2001
    Inventors: James F. Antaki, Bradley Paden, Gregory Burgreen, Nelson J. Groom
  • Patent number: 6290471
    Abstract: A miniature heat dissipating fan includes a housing and an impeller. A circuit board and a stator bobbin, a balance plate, and an axle support. The axle support has an axle or a bearing member mounted thereto. The impeller has a bearing member or an axle and arranged in a manner that the axle and the bearing member support each other. The impeller further includes a ring magnet wherein the ring magnet and the balance plate attract each other.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: September 18, 2001
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventor: Alex Horng
  • Patent number: 6267567
    Abstract: A cooling fan has a housing having a recess defined therein and a seat formed on a bottom face thereof. A circuit board is secured on the seat of the housing. A coil has an opening defined therethrough and a bracket is provided beneath the coil to fix it on the circuit board. A sleeve, of which a first end is enclosed, is received in the opening of the coil and has a fastener formed at a second end thereof and engaged with the outer periphery of the coil. A collar is provided at a bottom face of the sleeve. A self-lubricating bearing is provided in the sleeve and on the collar. A rotor having a core is received in the bearing and inserted through the collar.
    Type: Grant
    Filed: April 4, 2000
    Date of Patent: July 31, 2001
    Inventor: Hsin-Mao Hsieh
  • Patent number: 6244835
    Abstract: A blood pump preferably has a magnetically suspended rotor that rotates within a housing. The rotor may rotate about a stator disposed within the housing. Radial magnetic bearings may be defined within the stator and the rotor in order to suspend the rotor. The radial magnetic bearings may be passive magnetic bearings that include permanent magnets disposed within the stator and the rotor or active magnetic bearings. The pump may further include an axial magnetic bearing that may be either a passive or an active magnetic bearing. A motor that drives the rotor may be disposed within the housing in order to more easily dissipate heat generated by the motor. A primary flow path is defined between the rotor and the stator, and a secondary flow path is defined between the stator and the rotor. Preferably, a substantial majority of blood passes through the primary flow path.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: June 12, 2001
    Inventors: James F. Antaki, Bradley Paden, Gregory Burgreen, Nelson J. Groom
  • Patent number: 6132182
    Abstract: A blower unit which, in one embodiment, includes an elongate main mounting member, a stator, a fan subassembly, and a blower housing, is described. In the one embodiment, the elongate main mounting member is the main structural member of the unit. The stator includes a stator core and stator windings, and the stator is secured to the main mounting member. The fan subassembly includes a rotor and a plurality of vanes. The rotor includes a substantially cylindrical iron ring and a magnetic portion having a substantially cylindrical shape. The magnetic portion is secured within the inner diameter of the iron ring and defines a rotor bore. The stator is located in the rotor bore and is concentric with respect to the rotor. The rotor is coupled to the plurality of vanes so that the vanes rotate with the rotor. The fan subassembly also includes bearing assemblies which are spring biased toward, and into rotatable engagement with, the elongate main mounting member.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: October 17, 2000
    Assignee: General Electric Company
    Inventors: Khan Mohamed Khirullah Genghis Khan, Roger Neal Johnson, Thomas Merlin Jahns, Vijay Kumar Stokes, John Leo August, Jr., Harold Lown
  • Patent number: 6132170
    Abstract: A heat dissipating fan includes a casing, a stator seat, a fan wheel, and a lid. The casing includes a compartment for receiving the fan wheel, and a bottom wall that defines the compartment has an axle tube formed thereon. The casing further includes an air outlet defined in an end edge thereof and communicated with the compartment. The fan wheel includes a number of blades and an axle that is rotatably received in the axle tube. The lid is engaged on top of the casing and includes an air inlet. Each blade includes an upper section extended beyond the air inlet, while a lower section of each blade is below the lid. When the fan wheel rotates, ambient air is driven into the casing via the air inlet of the lid to carry heat in the casing away via the air outlet of the casing. The heat dissipating fan may drive more air by increasing an active area of the blades with reduced noise.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: October 17, 2000
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventor: Alex Horng
  • Patent number: 6050785
    Abstract: A miniature heat dissipating fan assembly includes a casing, a circuit board, a balance plate, a stator, a rotor, and a cover plate. The casing includes a compartment and an air outlet communicated with the compartment. A bottom wall that defines the compartment includes a tube seat formed thereon. The circuit board includes a fixing hole so as to be mounted around the tube seat. The balance plate also includes a fixing hole so as to be mounted around the tube seat. The stator includes an axle tube received in the tube seat, while the rotor includes an axle rotatably received in the axle tube, and a fastening member is provided to a distal end of the axle to retain the axle in place. The cover plate is attached to the casing and includes an air inlet. The balance plate is made of magnetic material and mounted below the rotor. A permanent magnet on the rotor and the balance plate attract each other to generate an attraction therebetween.
    Type: Grant
    Filed: November 4, 1998
    Date of Patent: April 18, 2000
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventor: Alex Horng
  • Patent number: 6050782
    Abstract: High velocity vacuum pump, such as turbomolecular pump, drag pump, centrifugal pump or the like, comprising a stator (10) and a rotor (18,43,53), which is axially and radially suspended with respect to the stator (10) by magnetic bearings (27). The vacuum pump may comprise two at the same rotor provided, parallelly acting pump portions, each one comprising two pumping steps. The rotor may be cylindrical and rotates around an inner stator shaft and within an outer stator portion. In that way, one pumping step (22) is formed between the inner stator shaft and the rotor and another pumping step (24) between the outer stator portion (10) and the rotor. The magnet bearing comprises at least one rotation symmetric magnet (27) and is disposed to give rise to a rotation symmetric magnetic field which is centered around the rotational axis.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: April 18, 2000
    Assignee: Magnetal AB
    Inventor: Torbjorn Lembke
  • Patent number: 6015272
    Abstract: A rotary pump for pumping fluids through a patient having a housing with an internal region, a stator member and an impeller positioned within the housing and having impeller blades, wherein the impeller is magnetically suspended and rotated, and wherein the geometric configuration of the rotary pump is sized and proportioned to minimize stagnant and traumatic fluid flow within the rotary pump. The plurality of magnetic impeller blades are preferably rare earth, high-energy-density magnets selected from the group consisting of samarium cobalt and neodymium-iron-boron alloy.
    Type: Grant
    Filed: June 26, 1996
    Date of Patent: January 18, 2000
    Assignees: University of Pittsburgh, The United States of America as represented by Administrator of the National Aeronautics and Space Administration
    Inventors: James F. Antaki, Bradley Paden, Gregory Burgreen, Nelson Groom
  • Patent number: 5979541
    Abstract: With the objective of providing a cooling fan and a cooling fan assembly in which the cooling efficiency is high, and which has been lightened, the invention has been composed by a cooling fan 1, a casing 2 composed from a casing main body 3 and a lid part 4 in which a circular aperture 42 is formed, a fan motor 5 arranged within this casing 2, a circuit board 8 and the like. A plurality of radiator plates 32 are arranged in a standing formation in the outer peripheral part 312 of the casing main body 3. The fan motor 5 includes a rotor 7 in which seven fan blades 72 are arranged as projecting toward the outer peripheral direction, and a stator 6 fixed in a base plate 31. The outermost diameter b of the large diameter part 722 of the fan blades 72 is set so that it is larger than the inner periphery of the aperture 42, and the outer diameter c of the inner diameter part 723 of the fan blades 72 is set as smaller than the inner diameter of the aperture 42.
    Type: Grant
    Filed: August 6, 1997
    Date of Patent: November 9, 1999
    Assignee: Seiko Epson Corporation
    Inventor: Kohichi Saito
  • Patent number: 5931660
    Abstract: A gas premix burner in which gas and air are mixed in a suction region of an impeller to form a combustion mixture. The impeller is associated with a blower housing and an electronic control circuit board, all of which are arranged upstream in a blower chamber having at least one flame separating wall. The arrangement prevents the gas and the combustion mixture from reaching the motor landings or the printed circuit board.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: August 3, 1999
    Assignee: Papst Motoren GmbH & Co. KG
    Inventors: Wolfgang Amrhein, Fritz Schmider
  • Patent number: 5899669
    Abstract: A compressor device, more particularly a two-stage compressor device (1), consists of a low-pressure compressor (4), a first compartment (7) of a cooling part (6) connected to the low-pressure compressor (4) by a first flexible connector (21), a high-pressure compressor (5) which is connected to the exit (11) of the first compartment (7), a second compartment (8) of the cooling part (6) which is connected to high-pressure compressor (5) by a second flexible connector (22), and a conduit (15) which is connected to the exit of the second compartment (8) for the discharge of the compressed gas. Flexible connections (21-22) are situated at opposite sides of a compression part (3) formed by the low-pressure compressor (4) and the high-pressure compressor (5), such that flexible connectors (21-22) extend substantially opposite each other. The arrangement of flexible connectors (21-22) in compressor device (1) avoids the transmission of movements and vibrations from compression part (3) to cooling part (6).
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: May 4, 1999
    Assignee: Atlas Copco Airpower, naamloze vennootschap
    Inventor: Guido Rene Louisa Van Grimberge
  • Patent number: 5893705
    Abstract: A blower unit includes an elongate main mounting member, a stator, a fan subassembly, and a blower housing. The elongate main mounting member is the main structural member of the unit. The stator includes a stator core and stator windings, and the stator is secured to the main mounting member. The fan subassembly includes a rotor and a plurality of vanes. The rotor includes a substantially cylindrical iron ring and a magnetic portion having a substantially cylindrical shape. The magnetic portion is secured within the inner diameter of the iron ring and defines a rotor bore. The stator is located in the rotor bore and is concentric with respect to the rotor. The rotor is coupled to the plurality of vanes so that the vanes rotate with the rotor. The fan subassembly also includes bearing assemblies which are spring biased towards, and into rotatable engagement with, the elongate main mounting member. The fan subassembly further includes a shroud for partially enclosing the plurality of vanes.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: April 13, 1999
    Assignee: General Electric Company
    Inventors: Khan Mohamed Khirullah Genghis Khan, Roger Neal Johnson, Thomas Merlin Jahns, Vijay Kumar Stokes, John Leo August, Jr., Harold Lown
  • Patent number: 5678988
    Abstract: A gas premix burner in which gas and air are mixed in a suction region of an impeller to form a combustion mixture. The impeller is associated with a blower housing and an electronic control circuit board, all of which are arranged upstream in a blower chamber having at least one time separating wall. The arrangement prevents the gas and the combustion mixture from reaching the motor landings or the primed circuit board.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: October 21, 1997
    Assignee: Papst-Motoren GmbH & Co. KG
    Inventors: Wolfgang Amrhein, Fritz Schmider
  • Patent number: 5650678
    Abstract: A bearing holder capable of holding therein a pair of bearings while keeping axes of the bearings to be positively aligned with each other and minimizing stress applied to the bearings. The bearing holder which is made of plastic resin and in which the bearings are held is mounted on a housing made of plastic resin. The bearing holder includes a hollow cylindrical holder body which is provided on an inner surface thereof with a plurality of projections inwardly projected therefrom so as to be contacted with an outer periphery of each of the bearings. The projections each are formed so as to continuously extend in a longitudinal direction of the holder body. The holder body is formed at each of both ends thereof with a plurality of slits each extending along each of both sides of each of the slits.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: July 22, 1997
    Assignee: Sanyo Denki Co., Ltd.
    Inventors: Shinjiro Yokozawa, Kesatsugu Watanabe
  • Patent number: 5547350
    Abstract: A shaftless compressor module has a module casing containing an axial chamber and an annular chamber which is coaxial with the axial chamber. An annular motor stator can be fixedly positioned in the annular chamber coaxially with the longitudinal axis of the axial chamber. An annular motor rotor can be positioned in the annular chamber coaxially with the annular motor stator. A shaftless impeller is rotatably mounted within the axial chamber. The impeller has a plurality of impeller passageways, with one end of each passageway being open to the inlet of the module casing and the other end of each passageway being located in a radially outer periphery of the impeller. Magnetic bearings can counter axial thrust and radial thrust. Annular gas seals can prevent gas flow through the second chamber. A plurality of these modules can be connected together to form a multiple stage shaftless compressor wherein each impeller can be driven at a different speed.
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: August 20, 1996
    Assignee: Dresser-Rand Company
    Inventors: Dharamendra N. Rawal, Philippe Auber
  • Patent number: 5492458
    Abstract: An electric fan includes a housing having a hub formed in the center, a shaft has one end force-fitted in the hub and having an annular flange formed in the other end, two polar plate are force-fitted on the shaft, and a stator is disposed between the polar plates. The upper polar plate and the lower polar plate each includes a hole for engaging with the shaft and the holes have one or more teeth for solidly engaging with the shaft.
    Type: Grant
    Filed: January 6, 1995
    Date of Patent: February 20, 1996
    Inventor: Alex Horng
  • Patent number: 5297942
    Abstract: A quiet fluid passing apparatus comprising a fluid passing rotor comprising open porous structure extending along an annular path, the rotor forming passage means to pass fluid through the rotor open porous structure as the rotor rotates; said path having an inner circumference with diameter ID and an outer circumference with diameter OD, and wherein ##EQU1## The quiet, fluid-passing apparatus may include open porous structure in combination with structures, such as blades and honeycomb material, to form rotors capable of moving fluid in axial or radial directions.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: March 29, 1994
    Inventors: Roc V. Fleishman, John M. Popovich, Carsten H. Idland
  • Patent number: 5281106
    Abstract: A radial-blade double-inlet fan (1) which includes a casing (2) with two inlet openings (8,10) facing each other, an external electrical rotor motor (14) located in casing (2), having a stator (16) and a rotor (18), and of a radial impeller (20) which is connected to rotor (18) and which axially extends on both sides beyond motor (14) into the direction of inlet openings (8,10). To absorb the oscillations, motor (14) is flexibly supported by the casing. Stator (16) is connected to stator flange (32), and rotor (18) encloses stator (16) only along one side approximately up to stator flange (32).
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: January 25, 1994
    Assignee: ebm Elektrobau Mulfingen GmbH & Co.
    Inventors: Wilhelm Reinhardt, Markus Neckermann
  • Patent number: 5267842
    Abstract: An axial flow fan for ventilating electrical and electronic equipment includes a brushless, DC external rotor-type central drive motor. The stator is supported by a bearing tube formed of plastic, which is connected together with a mounting flange to form a single piece.
    Type: Grant
    Filed: August 4, 1992
    Date of Patent: December 7, 1993
    Assignee: Papst Licensing GmbH
    Inventors: Siegfried Harmsen, Rolf Muller, Gunter Wrobel
  • Patent number: RE34456
    Abstract: The invention relates to a miniature axial fan particularly of an axially compact construction, having a central motor driving a rotor disk with a housing surrounding the rotor disk in which an interior housing wall on the inflow side is cylindrical and extends past the axial center of the housing and then this cylinder wall expands outwardly to the outlet side of the housing to produce an enlargement of the flow cross-section. The housing has webs extending inwardly from the outlet side of the housing that carry the central driving motor with the rotor disk. A number of blades are mounted on the rotor disk which numbers differs from the number of webs.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: November 23, 1993
    Assignee: Papst Motoren
    Inventors: Siegfried Harmsen, Gunter Wrobel