Patents Examined by Judson H. Jones
  • Patent number: 6911747
    Abstract: An X-Y stage system is disclosed which is easy to assemble and compact or slim in construction. Both the X- and Y-stages are allowed to move without getting influence from the magnetic force created by the field magnets. The X-Y stage system has an X-stage movable relatively to a bed through a linear motion guide unit in an X-direction, and a Y-stage movable relatively to the X-stage through another linear motion guide unit in a Y-direction. The linear motors to force the X- and Y-stages are composed of paired field magnets of secondary side held to the bed and the Y-stage, respectively, and armature windings of primary side supported on the opposite sides of the X-stage in a way lying in clearances between the opposing field magnets.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: June 28, 2005
    Assignee: Nippon Thompson Co., Ltd.
    Inventors: Takaaki Tsuboi, Eiji Ida
  • Patent number: 6911791
    Abstract: Load cycle oscillations in the drive train of a motor vehicle are reduced by detecting a change in available torque in the drive train, determining the period of a load cycle oscillation, and, at the commencement of the available torque change, applying at least one additional torque pulse, which causes an oscillation in phase opposition to the load cycle oscillation and which lasts half the period of the load cycle oscillation.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: June 28, 2005
    Assignee: Mannesmann Sachs AG
    Inventor: Gerhard Tebbe
  • Patent number: 6909214
    Abstract: A small motor in a casing has a motor shaft, which has a worm outside the casing. A worm wheel is rotatably mounted to a housing for a reduction mechanism and meshes with the worm. The motor shaft is supported by radial bearings in the housing, and is supported at the bottom by a thrust bearing thereby simplifying the structure. Furthermore, a rotary disc is fixed to the motor shaft to rotate together with the motor shaft. An angle of rotation of the motor shaft is detected by a rotation detector via the rotary disc and converted to a digital signal by an electronic circuit.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: June 21, 2005
    Assignee: Igarashi Electric Works Ltd.
    Inventors: Naoto Seshita, Yoshinori Yamauchi
  • Patent number: 6909205
    Abstract: A motor allowing multiple degrees of output freedom includes a stator having an interior surface forming at least a portion of a sphere or curved surface and first and second substantially orthogonally positioned stator coils wound on the interior surface. A rotor is fixed to an output shaft and movably supported adjacent the stator with an air gap disposed between the rotor and the stator. The rotor includes a plurality of magnets disposed thereon and is movable along the interior surface in directions defining at least first and second degrees of freedom. Upon energization of the first stator coil, a first magnetic field is established to urge at least a first one of the magnets and the rotor in a direction of the first degree of freedom and upon energization of the second stator coil, a second magnetic field is established to urge at least a second one of the magnets and the rotor in a direction of the second degree of freedom.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: June 21, 2005
    Assignee: Engineering Matters, Inc.
    Inventors: Christopher J. Corcoran, Richard R. Fontana
  • Patent number: 6903468
    Abstract: Disclosed is a stage device by which high precision motion and high speed motion can be accomplished simultaneously. The stage device includes a stage, a repulsive magnet unit for accelerating and/or decelerating the stage with respect to a movement direction, and a magnetic driving system for controlling the position of the stage. The repulsive force generator has (i) a repulsive stator, as a set magnet, including a plurality of magnets disposed along a direction orthogonal or substantially orthogonal to the movement direction, with a spacing therebetween while different poles of them are opposed to each other, and (ii) a repulsive movable element, as an insert magnet, to be mountably and demountably inserted into the spacing and being disposed in relation to the repulsive stator so that the same poles are opposed to each other.
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: June 7, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventor: Nobushige Korenaga
  • Patent number: 6903467
    Abstract: The disclosure relates to an apparatus for manufacturing a product, including a product stage assembly, having a movable product stage, the product stage assembly having at least one input is supplied by at least one tube. A tube carrier assembly for positioning the at least one tube relative to the product stage assembly is also provided along with a reaction apparatus positioned to absorb inertial forces created by tube carrier assembly movement substantially independently of inertial forces created by movable product stage movement. A method of operation therefore is also provided.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: June 7, 2005
    Assignee: Nikon Corporation
    Inventor: Andrew J. Hazelton
  • Patent number: 6900558
    Abstract: A reciprocating motor in which a plurality of eddy current preventing holes (26) are formed in the directions of circumference and shaft of a magnet frame (10) in a magnet mounting portion (12) of the magnet frame (10)connected between the magnet (8)and component part which will perform a reciprocating movement, for transmitting a reciprocating movement of the magnet (8) to a component part, to prevent deformation of the magnet frame (10)in molding the eddy current (26) and maintain roundness of the magnet frame precisely by improving the structure of the eddy current preventing holes which are molded in the magnet frame.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: May 31, 2005
    Assignee: LG Electronics Inc.
    Inventors: Won-Hyun Jung, Bon-Cheol Ku
  • Patent number: 6897586
    Abstract: An axial tube assembly of a motor includes an axial tube around which a stator assembly is mounted, an engaging member, and a sleeve in which a bearing is mounted. The engaging member includes a base and a plurality of resilient legs projecting from the base. Each resilient leg has a hook on a distal end thereof. The base of the engaging member is engaged with and thus seals a bottom end of an axial hole of the axial tube. The sleeve is mounted in the engaging member and has a base portion. The hook of each resilient leg is pressed outward to thereby retain the stator assembly in place when the sleeve and the engaging member are received in the axial tube, with the resilient legs of the engaging member together holding the sleeve to thereby allow tight engagement between the sleeve and the bearing.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: May 24, 2005
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventors: Alex Horng, Yin-Rong Hong
  • Patent number: 6897628
    Abstract: Ultrasound for use in promoting a chemical reaction is generated by an electromagnet formed from a pair of magnetostrictive prongs wound with coils that are oriented to produce an oscillating magnetostrictive force when an oscillating voltage is applied, in conjunction with a sensing electromagnet of magnetostrictive material that is arranged to receive the vibrations generated by the driving electromagnet and produce internal magnetic field changes due to the reverse magnetostrictive effect. These field changes generate voltages that are representative of the amplitude of the oscillating magnetostrictive force. The generated voltage is compared to a target value in a control circuit that adjusts the applied oscillating voltage accordingly. The oscillations in the prongs of the electromagnet are transmitted to an ultrasonic horn that is immersed in the reaction medium to provide direct contact with the reaction mixture.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: May 24, 2005
    Assignee: SulphCo, Inc.
    Inventors: Rudolf W. Gunnerman, Charles I. Richman
  • Patent number: 6894408
    Abstract: An actuator is provided in which one or more separate compensating coils are employed to alter the distribution of the magnetic flux density in the air gap to produce a substantially constant force throughout the stroke; and in which current in the separate compensating coils can be adjusted with the stroke using separate power supplies and position feedback.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: May 17, 2005
    Assignee: BEI Technologies, Inc.
    Inventor: Mikhail Godkin
  • Patent number: 6894407
    Abstract: A reciprocating motor is disclosed having a magnet frame (10) connected between a magnet (8) and an element to be reciprocally moved to transmit a reciprocal movement of the magnet (8) to the element, the magnet consisting of a first mounting unit (12) at which the magnet (8) is fixed and a second mounting unit (14) made of a different material with the first mounting unit (12), being connected to the first mounting (12), and with which the element is engaged. A portion of the magnet frame (10) where the magnet is fixed is made of a nonmetallic material to minimize a loss of flux generated from a winding coil (6).
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: May 17, 2005
    Assignee: LG Electronics Inc.
    Inventors: Won-Hyun Jung, Bon-Cheol Ku
  • Patent number: 6894417
    Abstract: An electric machine having multi-set rectangular copper hairpin windings comprises a stator having a plurality of partially closed stator slots. A first winding set and a second winding set are positioned in the stator slots. The first winding set and the second winding set are connected by adjacent leg ends. According to a first embodiment, conductor layers in alternate slots alternate between different phases. The conductor layers in the remaining slots are all of the same phase. Hairpins having unequal length legs are used to implement the first embodiment. According to a second embodiment, conductor layers in alternate slots include one phase for the first winding set and another phase for the second winding set. The conductor layers in the remaining slots are all of the same phase. Hairpins having equal length legs are used to implement the second embodiment.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: May 17, 2005
    Assignee: Remy Inc.
    Inventors: Wei Cai, David Fulton, Christopher L. Congdon
  • Patent number: 6894449
    Abstract: In order to remove vibration or improve a vibration control effect, and achieve device size reduction, an adjusting device is provided in which a weight of a support target object is supported by a pressure of an internal gas of a first chamber gas via a holding member and which adjusts a position in a gravity direction of the holding member by driving a movable member which changes an internal volume of the first gas chamber by changing an internal volume of a second gas chamber based on a state change of at least one of first and second gas chambers. Because of this, when the holding member is displaced in the gravity direction because of the vibration or the like, as the movable member is driven by the adjusting device, the holding member is maintained at an original position.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: May 17, 2005
    Assignee: Nikon Corporation
    Inventor: Kenji Nishi
  • Patent number: 6888278
    Abstract: Low-profile spindle motor whose entire shaft length is utilized to configure, along an encompassing sleeve, a radial dynamic-pressure bearing section. One end of the shaft is unitary with the rotor, and a cover member closes the other end. Between the sleeve upper-end face and the rotor undersurface a thrust bearing section is configured. Micro-gaps are formed continuing between the sleeve upper-end face and the rotor undersurface; the sleeve inner-circumferential surface and the shaft outer-circumferential surface; and the cover member inner face and the shaft end face, where an axial support section is established. Oil continuously fills the micro-gaps, configuring a full-fill hydrodynamic bearing structure. Hydrodynamic pressure-generating grooves in the radial bearing section are configured either so that no axial flow, or so that a unidirectional flow that recirculates from one to the other axial end of the radial bearing section through a communicating pathway is induced in the oil.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: May 3, 2005
    Assignee: Nidec Corporation
    Inventors: Hideki Nishimura, Yoshito Oku, Shinya Yano
  • Patent number: 6888279
    Abstract: An electric motor operated by AC current, that includes a stator and a rotor supported for rotation about an axis relative to the stator. The stator is provided with field windings angularly distributed about the rotor axis and capable of producing a magnetic field vector in the space of the rotor. Circuitry delivers AC current to the windings in a manner that produces an AC magnetic field vector that moves around the axis of the rotor. The rotor has a construction, such as an axially extending conductive loop, that changes its reluctance in the AC magnetic field depending on its orientation to the AC magnetic field vector whereby the rotor is caused to rotate in synchronization with the movement of the AC magnetic field vector.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: May 3, 2005
    Inventor: Lambert Haner
  • Patent number: 6882065
    Abstract: The invention relates to a linear motor, in which the permanent magnets (5), the support (1.1, 1.2) for the permanent magnets (5) and the fixing elements (4) of the support (1.1, 1.2) are completely covered. The covering consists of cover strips (7) that are detachably applied next to the permanent magnets (5) in the border region of the support (1.1, 1.2) and that cover the fixing elements (4), in addition to the fixing boreholes (3) of the support (1.1, 1.2). The permanent magnets (5) are covered by a cover plate (10), which lies on top of the cover strips (7).
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: April 19, 2005
    Assignee: Etel SA
    Inventors: Jean-Pierre Morel, Walter Freund
  • Patent number: 6882073
    Abstract: In order to reduce cost through reduction in material cost and improvement of productivity, in a linear type actuator comprising: a stator unit having coils consisting of wound magnet wires and housed inside stator sub-assemblies and pole teeth arranged on the inner circumference thereof; a rotor unit having a field magnet arranged on the outer circumference thereof and rotatably disposed so as to oppose the pole teeth with a given gap; an output shaft attached to a center portion of the rotor unit and movable in the axial direction thereof; and converting means provided on the innermost diametral circumferential surface of the rotor unit and adapted to convert rotary motion of the rotor unit into linear motion of the output shaft, the converting means is made of a material different from that of the rotor unit.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: April 19, 2005
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Sakae Fujitani, Naoyuki Harada, Kunitake Matsushita
  • Patent number: 6879073
    Abstract: An electromotive linear drive includes one or more drive motors and a corresponding number of torque-reducing transmissions and corresponding driven spindles and a casing. The casing is comprised of two casing parts, whereby the abutting surfaces of the casing parts are sealed by a sealing element or a plurality of sealing elements. Connecting terminals for mechanical and/or electrical components are provided on the exterior of the casing parts.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: April 12, 2005
    Assignee: Dewert Antriebs- und Systemtechnik GmbH & Co. KG
    Inventors: Andreas Roither, Ralf Bokämper, Horst Finkëmeyer, Jürgen Martin
  • Patent number: 6876107
    Abstract: A controlled motion system, which has a mover that is movably mounted on a track for moving along a path. Active and reactive elements are associated with the track and mover, and are configured for driving and controlling the mover along the path. A controller is operatively associated with the active elements for controlling the driving of the mover, and a position sensor is associated with the track and configured for sensing the position information corresponding to the position of the mover along the path. The sensor is associated with the controller for transmitting the position information to the controller. The sensors are also preferably configured such that the position information is transmitted from the mover through the sensor at a sensing speed faster than about 10,000 meters per second.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: April 5, 2005
    Assignee: Jacobs Automation
    Inventor: Keith Jacobs
  • Patent number: 6876105
    Abstract: A wireless encoder system facilitates operation and control of a motor, such as linear motor. The system includes an encoder sensor moveable with a first part of the motor. The encoder sensor is operative to sense movement of the first part relative the second part and provide an encoder signal having an electrical characteristic indicative of the sensed movement. A transmitter, which is associated with the encoder sensor, is operative to transmit a wireless transmitter signal based on the encoder signal. A remote receiver that receives the wireless transmitter signal thus may determine position and/or movement of the first part of the motor relative to a second part of the motor.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: April 5, 2005
    Assignee: Anorad Corporation
    Inventors: Mustansir Faizullabhoy, Anwar Chitayat