Patents Examined by Judson H. Jones
  • Patent number: 7166938
    Abstract: Disclosed herein is a horizontal and vertical transportation system using permanent magnet excited transverse flux linear motors which is capable of linearly transporting an object in the horizontal direction and in the vertical direction using permanent magnet excited transverse flux linear motors, thereby obtaining a simple structure of the system and preventing any occurrence of dust generated by abrasion between the parts of the system. The system comprises a horizontal transportation unit and a vertical transportation unit. The horizontal transportation unit is adapted for transporting the object in the horizontal direction by means of a thrust from a permanent magnet excited transverse flux horizontal linear motor. The vertical transportation unit is installed on the horizontal transportation unit. The vertical transportation unit is adapted for transporting the object in the vertical direction by means of thrusts from permanent magnet excited transverse flux vertical linear motors.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: January 23, 2007
    Assignee: Korea Electrotechnology Research Institute
    Inventors: Do Hyun Kang, Jong Moo Kim
  • Patent number: 7129601
    Abstract: A method and apparatus for supporting a movable member (10) with respect to a fixed member (40) is provided. The movable member (10) includes a magnetically permeable portion (81) contained therein and magnetic element (50) fixedly attached thereto and movable therewith. The movable member (10) is supported for rotation with respect to the fixed member (40) by an outer bearing surface (11) of the movable member and an inner bearing surface (20) of the fixed member (40). The fixed member (40) provides access to the movable member (10) from two sides thereof. A magnetically permeable stator element (70) is fixedly attached to the fixed member (40) and positioned within a magnetic flux field of the magnetic element (50) such that an air gap (73) is formed between the magnetic element (50) and the stator element (70).
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: October 31, 2006
    Assignee: GSI Group Corporation
    Inventors: David C. Brown, Felix Stukalin, Michael B. Nussbaum, Kurt Pelsue
  • Patent number: 7129603
    Abstract: A water-cooled stator bar clip for electrical generators and a method for applying a corrosion-resistant protective coating, preferably Sc, Ti, Cr, Zr, Nb, Mo, Hf, Ta, W, Ni, and Al, and their alloys or oxides to existing stator bar end fittings in order to significantly reduce the possibility of leaks through the brazed connections of the copper stator bar end connections. The coatings can be applied locally using various known physical vapor deposition (“PVD”), chemical vapor deposition (“CVD”) or other direct coating techniques known in the art. For example, the coatings can be applied using ion plasma deposition, sputtering or wire arc techniques (all PVD processes) or by using electroplating, high velocity oxygen free (“HVOF”) deposition, DC arc or electroless plating. Preferably, the coatings are applied either to new stator bar clips or to existing clips in the field.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: October 31, 2006
    Assignee: General Electric Company
    Inventors: Young Jin Kim, Paul Joseph Martiniano, Reed Roeder Corderman, Scott Andrew Weaver, Alan Michael Iversen, James Rollins Maughan
  • Patent number: 7116018
    Abstract: An oscillating motor has a rotor rotation of about ±15° from a rest position. The rotor has two salient poles which face a respective permanent magnet across a small air gap. The stator has a laminated stator core supporting the magnets and also two salient poles each supporting a stator coil. The stator poles confront the rotor across a small air gap between the rotor poles. When no current is flowing through the coils, the rotor rests in a rest position with the poles aligned between the north and south poles of the magnets. During operations, the stator coils induce like magnetic poles in the stator poles which in turn induce like magnetic poles in the rotor poles causing the rotor to swing towards opposite magnetic poles of the permanent magnets. When current flows in the reverse direction, the rotor swings to the opposite poles of the magnets.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: October 3, 2006
    Assignee: Johnson Electric S.A.
    Inventor: Georg Strobl
  • Patent number: 7105956
    Abstract: A high precision z-theta stage having a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis comprises parallel spaced apart linear translation stages, a carriage supported between the parallel translation stages, and a rotation stage carried by the carriage between the parallel translation stages. Each brushless linear motor is connected to the carriage to apply translation forces in a horizontal plane intersecting the vertical center of gravity.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: September 12, 2006
    Assignee: Aerotech, Inc.
    Inventors: Stephen J. Botos, Brian P. O'Connor
  • Patent number: 7098562
    Abstract: A motor assembly 30 includes an electric motor 32 having a rotatable shaft 40, the shaft 40 having a worm 38; and a gear unit 33 operatively associated with the motor, the gear unit has first and second opposing ends. The gear unit 33 includes a gearwheel 36 operatively coupled with the worm 38 of the shaft 40 such that rotation of the shaft rotates the gearwheel. A driver 42 is operatively coupled with gearwheel so as to rotate therewith. The driver 42 is constructed and arranged to provide a driving member 43, 44 accessible at each of the first and second ends of the gear unit.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: August 29, 2006
    Assignee: Siemens VDO Automotive Corporation
    Inventors: JonYeon Oh, Barry Anderson, Martin Bass
  • Patent number: 7095190
    Abstract: An improved arrangement for operating a contact roller (7) and an associated method, characterized inter alia by the following features: a linear motor drive (14) is allocated to the contact roller (7) in order to change positon; a force adjustment device (400) is provided for the linear motor drive (14); a suitable sensor is also provied in order to determine speed or acceleration.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: August 22, 2006
    Assignee: Bruckner Maschinenbau GmbH
    Inventor: Bernd Sieber
  • Patent number: 7091679
    Abstract: A motor is disclosed that uses magnetic propulsion for generating movement along a travel path in which the motor controller is mounted onboard the thrust block, thereby reducing connections the need for a remote motor controller. The motor includes a thrust rod extending along a travel path. The thrust rod includes an array of magnets arranged along the travel path arranged to create magnetic fields spaced along the travel path for generating magnetic propulsion when electrical coils on the thrust block are energized. The thrust block comprising a mounting body, electrical coils, and the onboard motor controller. The block may integrally provide a bearing surface that slides along a rail that may also provide the mounting structure and main support for the motor. A encoder mounted to the thrust block with a scale mounted directly to guide rail is also provided.
    Type: Grant
    Filed: February 19, 2004
    Date of Patent: August 15, 2006
    Assignee: Pacific Bearing Company
    Inventors: Robert Schroeder, Robert Gronewold, Cleve Koehler, Richard Stevens, Glen Michalske
  • Patent number: 7088018
    Abstract: An electromagnetic drive type actuator comprises a movable plate having a flat surface, a support positioned around the movable plate, an elastic member connecting the movable plate with the support, wirings extending through the support, the movable plate, and the elastic member, and a magnetic field generator. The elastic member is elastically deformable and supports the movable plate so as to allow the movable plate to move in directions orthogonal to the flat surface of the movable plate. The wirings pass currents. The magnetic field generator generates a magnetic field in a space around the movable plate. The magnetic field has a direction parallel to the flat surface of the movable plate. The movable plate is moved in the directions orthogonal to the flat surface of the movable plate by a mutual effect between the currents flowing through the wirings and the magnetic field generated by magnetic field generator.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: August 8, 2006
    Assignee: Olympus Corporation
    Inventor: Kazuya Matsumoto
  • Patent number: 7084532
    Abstract: The invention provides an apparatus and a method for positioning an object coupled to a first support structure and a second support structure. A first actuator drives the first support structure along a first axis and a second actuator drives the first support structure along a second axis orthogonal to the first axis. A third actuator comprising a forcer and a stator is provided for driving the second support structure that is guided for movement relative to the first support structure along a third axis orthogonal to the first and second axes. The forcer is coupled to the second support structure and is movable with respect to the stator, and the stator is relatively stationary and decoupled from the second support structure.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: August 1, 2006
    Assignee: ASM Assembly Automation Ltd.
    Inventors: Gary Peter Widdowson, Man Chung Raymond Ng, Yen Hsi Terry Tang
  • Patent number: 7084533
    Abstract: A dual-function, three-axis positioning system having a high precision z-theta state with a horizontal translation axis (z-axis) and a rotary axis (theta-axis) parallel with the translation axis and a second horizontal translation axis (x-axis) comprises parallel spaced apart linear translation states, a first carriage supported between the parallel translation stages, and a rotation stage carried by the carriage between the parallel translation stages. A removable or permanently fixed second carriage is mounted on or being part of the first carriage.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: August 1, 2006
    Assignee: Aerotech, inc.
    Inventors: Stephen J. Botos, Brian P. O'Connor
  • Patent number: 7071584
    Abstract: A linear motor includes tubular outer yoke (4), tubular inner yoke (3) disposed in outer yoke (4), coil (2) provided to inner yoke (3), permanent magnet (5a, 5b) vibrating following a magnetic flux produced by coil (2), and vibrator (6) made of magnetic material and supporting permanent magnets (5a, 5b). Magnetic loop produced by outer yoke (4) and inner yoke (3) travels through vibrator (6) free from interference by vibrator (6) because vibrator (6) is made of magnetic material. As a result, the linear motor vibrates efficiently.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: July 4, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shinichiro Kawano, Yukio Honda, Hiroshi Murakami
  • Patent number: 7071583
    Abstract: A uniaxial drive unit is provided with a tiltable pulse generating device having a joystick, which generates a continuous pulse of a frequency corresponding to the tilt angle of the joystick, and a rotary encoder having a knob, which generates a pulse of a frequency corresponding to the turning speed of the knob and generates pulses of the number corresponding to the turning angle of the knob to drive a linear motor. High-speed and medium-speed operations are carried out by using the tiltable pulse generating device, and low-speed fine feed is carried out by using the rotary encoder.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: July 4, 2006
    Assignee: Tokyo Seimitsu Co., Ltd.
    Inventor: Takashi Fukasawa
  • Patent number: 7071638
    Abstract: An actuator control apparatus is provided, capable of causing a state value which changes according to the action of an actuator to match a prescribed target value. A synchronizing mechanism is modeled as the collision of an inertial system object and an elastic system object, and taking as a state amount the deviation between the actual position (Psc) of a coupling sleeve and the target position (Psc_cmd), a computation coefficient (VPOLE) of a switching function used in sliding mode control which takes the state amount as a variable is, in a first process until the coupling sleeve makes contact with a synchronizer ring, set according to the actual position (Psc) of the coupling sleeve, and in a process until the coupling sleeve engages a synchronized gear, is set such that the pressing force of the coupling sleeve matches a target pressing force.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: July 4, 2006
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuji Yasui, Kanako Shimojo, Eijiro Shimabukuro
  • Patent number: 7067942
    Abstract: A linear motor including a coil, a plurality of first magnet groups having polar directions disposed in periodically different directions, and a plurality of second magnet groups having polar directions disposed in periodically different directions. In a set including a predetermined magnet of the first magnet groups and a magnet of the second magnet groups, corresponding to the predetermined magnet, magnetization directions of the set of magnets have mutually different tilts with respect to the central axis of the coil. The coil includes a first coil effective to produce a Lorentz's force between the first coil and the first magnet groups, and a second coil effective to produce a Lorentz's force between the second coil and the second magnet groups.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: June 27, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobushige Korenaga, Toshiya Asano
  • Patent number: 7064464
    Abstract: The invention relates to an electromechanical linear drive, in particular for an injection moulding machine, comprising an electric motor with a hollow-shaft rotor, open on one side, with a subsequent screw gear which converts the rotational movement of the hollow-shaft rotor into a linear movement. The hollow-shaft rotor is supported on the motor housing, at the end thereof closed by a end wall, such as to rotate, by means of a central bearing spigot projecting axially from the end wall.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: June 20, 2006
    Assignee: Demag Ergotech GmbH
    Inventor: Georg Ickinger
  • Patent number: 7057314
    Abstract: An electromagnetic drive motor assembly (EDMA) has at least one bridge that extends along a radial direction to conduct heat away from the magnetic gap and towards the outer surface of the EDMA. The EDMA includes a conductive ring between a first plate and a second plate. The conductive ring has an inner ring, an outer ring, and at least one bridge between the inner and outer rings. The inner ring is adapted to receive a voice coil such that the heat generated by the voice coil conducts through the inner ring, the bridge, and then to the outer ring. As such, a heat conducting path is provided within the EDMA to remove the heat away from the voice coil. This allows the EDMA to operate more efficiently. The EDMA may also include a flux return having a pole piece that protrudes from the first plate. The inner ring of the conducting ring may receive the pole piece to form an intermediate gap between the pole piece and the inner ring.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: June 6, 2006
    Assignee: Harman International Industries, Inc.
    Inventor: Jerry Moro
  • Patent number: 7057313
    Abstract: A voice coil motor used, for example, in a positioning device associated with either a first object table or a second object table in which the coil is cooled with a cooling jacket in thermal contact with the coil, the cooling jacket comprising at least one channel for circulation of a cooling fluid, the or each channel being arranged such as to be substantially located in a portion of the cooling jacket adjacent to the coil, for use, for example, in a lithographic projection apparatus including a radiation system for supplying a projection beam of radiation, a first object table for holding a mask, a second object table for holding a substrate, a projection system for imaging irradiated portions of the mask onto target portions of the substrate. The cooling jacket may be formed of a ceramic material and may be of a monolithic construction.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: June 6, 2006
    Assignee: ASML Netherlands B.V.
    Inventors: Edwin J. Buis, Noud J. Gilissen, Yim Bun P. Kwan, Paulus H. C. M. Schapendonk
  • Patent number: 7042125
    Abstract: A fluid bearing design is provided which according to one aspect includes a shaft defining together with a surrounding sleeve an asymmetric journal bearing, and a thrust bearing at or near an end of the shaft towards which the asymmetric journal bearing is pumping, with that end of the shaft being closed off. The journal bearing asymmetry establishes a hydraulic pressure toward the closed end of the shaft. This pressure provides an axial thrust to set the bearing gap for the conical bearing. The conical bearing itself is a relatively balanced bearing, although it may have a bias pumping toward the shaft and the journal bearing. A pressure closed equalization path from the journal bearing through the conical bearing to the end of the shaft may be established to maintain a constant hydraulic force across the conical bearing, and which may also prevent any asymmetry in the conical bearing from affecting the net thrust force acting upon the end of the shaft where the conical bearing is located.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: May 9, 2006
    Assignee: Seagate Technology LLC
    Inventors: Jeffry Arnold LeBlanc, Alan Lyndon Grantz, Troy Michael Herndon, Michael David Kennedy, Anthony Joseph Aiello, Robert Alan Notthingham
  • Patent number: RE39747
    Abstract: The modular conveyor system comprises N interconnected track sections, forming a continuous track, wherein each track section features a plurality of individually controlled coils stretching along the length thereof. Plural pallets, each having thrust producing magnets, travel independently alone the track. The track also comprises multiple linear encoder readers spaced at fixed positions therealong, and each pallet includes a linear encoder strip having a length R greater than the spacing E between the readers. Track section controllers associate the encoder strips with only one reader at any time in order to resolve the position of the pallets based on the fixed position of the readers and the relative positions of the strips in relation thereto. The section controllers also regulate and commutate the coils of the corresponding track sections in order to independently control each pallet. Communication links interface adjacent section controllers situated in adjacent track sections.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: July 31, 2007
    Assignee: ATS Automation Tooling Systems Inc.
    Inventors: Laura Peltier, Robert Gordon Lankin, Wayne Michael Robinson, David Kyle MacKay, Jeffrey John Fortuna, Sajeev Madusuthanan, Scott Charles Lindsay, Michael A. Cybulski, Michael J. Hancock, Robert A. Holl, Donald J. Mowat, Kenneth Peltier