Patents by Inventor Yuzuru Suzuki

Yuzuru Suzuki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • LINEAR TYPE ACTUATOR
    Publication number: 20050046291
    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 movble 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: Application
    Filed: October 8, 2004
    Publication date: March 3, 2005
    Inventors: Yuzuru Suzuki, Sakae Fujitani, Naoyuki Harada, Kunitake Matsushita
  • Bobbin, motor, and method of winding magnet wire
    Publication number: 20050040725
    Abstract: A bobbin comprises three hollow-cylindrical sections, specifically a middle body section, and two lateral body sections. The middle body section has its diameter diminished compared to the two lateral body sections thus forming an annular recess which allows a magnet wire to be wound with an additional number of turns around the bobbin without increasing a motor size. With this bobbin structure, when the number of turns of a magnet wire is set to remain unchanged, the diameter of flanges of the bobbin can be reduced resulting in a downsized motor.
    Type: Application
    Filed: August 18, 2004
    Publication date: February 24, 2005
    Inventor: Yuzuru Suzuki
  • Electric rotary machine having positioning ring for securing salient poles in place
    Patent number: 6856065
    Abstract: An electric rotary machine includes a stator comprising: a stator ring; a plurality of discrete salient poles each comprising a bobbin with guide grooves and a pole tooth with a groove, disposed inside the stator ring, and fixed by a molding resin injected inside the stator ring; and a positioning ring having protrusions at its outer circumference and engaging with the discrete salient poles such that the protrusions are each fitted into the groove of the pole tooth.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: February 15, 2005
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Seiichi Matsuura, Sakae Fujitani, Kazuo Muramatsu
  • STEPPING MOTOR
    Publication number: 20050023918
    Abstract: There is provided a stepping motor of low vibration realized by reducing cogging with a simple structure while maintaining the performances such as torque.
    Type: Application
    Filed: August 31, 2004
    Publication date: February 3, 2005
    Inventors: Yuzuru Suzuki, Taketoshi Ohyashiki, Kunitake Matsushita
  • Bobbin and motor
    Publication number: 20050017593
    Abstract: In a motor comprising a stator assembly and a rotor assembly housed inside the stator assembly, a bobbin is structured to be oval-cylindrical in its radial cross section, rather than circular-cylindrical, such that a body section of the bobbin is composed of four continuous walls, two of which are formed of flat plates oriented perpendicular to the minor axis of the oval and disposed opposite to each other in parallel, and the other two of which are formed of outwardly arced plates oriented perpendicular to the flat walls and disposed opposite to each other in a symmetric manner. Pole teeth are provided only at portions corresponding to the arced walls to thereby reduce the dimension between the flat walls for downsizing while allowing an increased number of turns of a magnet wire wound around the bobbin.
    Type: Application
    Filed: July 21, 2004
    Publication date: January 27, 2005
    Inventor: Yuzuru Suzuki
  • Electric rotary machine
    Patent number: 6833649
    Abstract: An electric rotary machine is provided, in which a stator armature includes a stator ring that encloses a plurality of salient poles each with a pole tooth thereby forming a magnetic circuit, and in which the inner surface of the stator ring is made flat at portions to be in contact with the outer end faces of the pole teeth so that the stator ring can make surface-to-surface contact with the pole teeth without any air gap therebetween so as to secure a well-balanced magnetic circuit.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: December 21, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Kunitake Matsushita, Seiichi Matsuura
  • Planetary gear reduction device with torque limiter function
    Patent number: 6824490
    Abstract: A planetary gear reduction device with a torque limiter function includes a housing, an input shaft rotatably supported by one end of the housing and connected to a power source so as to input a torque from the power source, an output shaft rotatably supported by the other end of the housing so as to output the torque from the power source, a reduction gear train provided between the input shaft and the output shaft and constituted of a plurality of gears meshing with one another, and a torque limiting mechanism mounted in the reduction gear train. In this device, when an excessive torque is generated in the output shaft, torque transmission from the input shaft to the output shaft is disconnected by the action of the torque limiting mechanism.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: November 30, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Kunitake Matsushita, Kazuo Muramatsu
  • Electric rotary machine with stator armature including barrier walls
    Patent number: 6822356
    Abstract: An electric rotary machine includes a stator armature which comprises: a stator ring; a plurality of discrete salient poles each including a pole tooth and a coil, disposed inside the stator ring thereby forming a magnetic circuit, and fixed by a molding resin injected inside the stator ring from an injection port of a molding die; and a plurality of barrier walls. Each of the barrier walls is disposed between the injection port of the molding die and two coil terminal pins to which the coil has its both wire terminations connected respectively.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: November 23, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Seiichi Matsuura, Kunitake Matsushita, Kazuo Muramatsu
  • Electric rotary machine with armature of discrete salient pole structure
    Patent number: 6815861
    Abstract: An electric rotary machine comprises: a cylindrical pole tooth ring provided with a plurality of slits; and a plurality of salient poles each including a pole tooth. The salient poles are each positioned and fixed such that the pole tooth is fitted into the slit, which, by means of openings formed on the pole tooth ring along and close to the side wall of the slit, is adapted to be elastically deformed when receiving the pole tooth fitted thereinto.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: November 9, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Seiichi Matsuura, Sakae Fujitani
  • Permanent magnet stepping motor having pole teeth misaligned by an electrical angle
    Patent number: 6809438
    Abstract: The stator assembly of a PM stepping motor having a two-phase structure in which two stators arranged along the circumferential direction in such a manner that respective pole teeth are intermeshed together are combined back to back so as to phase-shift the respective pole teeth in the two stators at an electrical angle of 90°. The field rotor magnet is so arranged as to face the respective pole teeth at a small distance, and is magnetized on its circumferential surface along the circumferential direction with a plurality of alternating N- and S-poles having a preset width not matching the pole tooth pitch of each stator.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: October 26, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Taketoshi Ohyashiki, Sakae Fujitani
  • Portable telephone set and image display method thereof
    Publication number: 20040180699
    Abstract: The portable telephone set 10 comprises a user's input processing part 11, a various item processing part 12, a display control part 13, an image converter part 14, a memory unit 15 and an image display part 16 for an LCD or the like. Image data displayed as waiting display or menu display on an image display part 16 is extracted by a user's copying operation, then format converted in an image converter part 14 to a JPEG file or the like and then registered in a memory unit 15. The plurality of pieces of the stored image data are appropriately read out and displayed.
    Type: Application
    Filed: March 9, 2004
    Publication date: September 16, 2004
    Applicant: NEC CORPORATION
    Inventor: Yuzuru Suzuki
  • Stepping motor
    Patent number: 6791223
    Abstract: There is provided a stepping motor of low vibration realized by reducing cogging with a simple structure while maintaining the performances such as torque.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: September 14, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Taketoshi Ohyashiki, Kunitake Matsushita
  • Linear actuator, and production and inspection method thereof
    Publication number: 20040164623
    Abstract: In a motor portion of a linear actuator, a rear end cap and a front end protrusion, which are disposed respectively at the rear and front ends of a stator assembly, and which include rear and front bearings to rotatably support a rotor assembly, are formed by injection-molding simultaneously and integrally with a stator support member which fixedly supports constituent members of the stator assembly, whereby the stator assembly, the rear end cap, and the front end protrusion can be coaxially aligned to one another with a high degree of precision thus improving the assembling precision of the motor portion. Also, since the front bearing can be attached to the front end protrusion before an output shaft is attached, the rotation characteristic of the rotor assembly can be evaluated before the output shaft is attached.
    Type: Application
    Filed: February 24, 2004
    Publication date: August 26, 2004
    Inventors: Yuzuru Suzuki, Taketoshi Ohyashiki, Kazuo Muramatsu
  • Thrust member attached to outer surface of motor body, and motor including same
    Publication number: 20040164631
    Abstract: Cutouts are formed in a front end plate disposed of a motor body. A thrust member, which has a hump segment to touch and press against a rear end surface of a rotary shaft frontward, is detachably attached to the motor body such that distal ends of arm segments of the thrust member are fitted into respective cutouts of the front end plate.
    Type: Application
    Filed: February 24, 2004
    Publication date: August 26, 2004
    Inventors: Yuzuru Suzuki, Taketoshi Ohyashiki
  • Mechanism for deflecting headlamp optical axis without speed reduction gears
    Publication number: 20040165395
    Abstract: A mechanism for deflecting a headlamp optical axis comprises a connecting lever, a bracket, a stepping motor, a front end plate, and a traveling block. The bracket is attached to an outside frame constituting an automotive vehicle body, and the stepping motor is attached to the bracket in a horizontally movable manner. The stepping motor has a rotary shaft which has a screw formed thereon and engaging threadedly with the traveling block. The connecting lever is attached to the outside frame in a horizontally movable manner. In the mechanism structured above, when the rotary shaft rotates, the traveling block is caused to travel along the rotary shaft thereby causing the both ends of the connecting lever to move in respective arc paths, whereby an optical axis of a headlamp attached to one of the both ends of the connecting lever is deflected.
    Type: Application
    Filed: February 24, 2004
    Publication date: August 26, 2004
    Inventors: Yuzuru Suzuki, Kunitake Matsushita, Sylvie Belavsky
  • Linear actuator having mechanism for stopping linear movement of output shaft without touching rotor
    Publication number: 20040164624
    Abstract: A stopper member is included in a linear actuator comprising a stator assembly, a rotor assembly, an output shaft, and a stopper pin which is fixedly disposed at a frontward portion of the output shaft, and which is adapted to axially control the mode and amount of movement of the output shaft initiated by rotation of the rotor assembly. The stopper member is disposed fixedly with respect to the stator assembly and stops the axial movement of the output shaft without making it happen that the stopper pin which moves together with the output shaft touches the rotor assembly.
    Type: Application
    Filed: February 25, 2004
    Publication date: August 26, 2004
    Inventors: Yuzuru Suzuki, Shinji Tamaki
  • Rotor structure of inner rotor type motor
    Patent number: 6768242
    Abstract: There is disclosed a rotor structure of an inner rotor type motor comprising a stator including annular stator yokes each having a plurality of pole teeth along an inner circumference thereof and coils arranged inside the stator yokes, each coil constructed by winding a magnet wire and a rotor rotatably disposed with a small gap from the pole teeth of the annular yokes and having a permanent magnet arranged opposite to the pole teeth. The permanent magnet comprises a plurality of discrete segment magnets, which are arranged apart from each other by resin molding. Thus, the inexpensive inner rotor type motor rotor can be structured by using the magnet having excellent magnetic characteristics.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: July 27, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Kunitake Matsushita
  • Actuator
    Patent number: 6765320
    Abstract: The present invention provides a rotor magnet with a claw pole type of actuator of a single phase structure and a magnetization method of the rotor magnet, in which detent and dynamic torques are sufficiently ensured, an angle range of rotational operation is wide, the cost is inexpensive and the characteristics are stable. In the actuator of such structure, the rotor magnet is rotatably arranged through a fine space inside an armature coil, wherein the rotor magnet comprises a single cylindrical type of magnet having a distribution pattern of a magnetic flux in which the magnetic pole peak position of at least one of the N and S poles is shifted stepwise in the axial direction thereof.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: July 20, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Sakae Fujitani, Masaki Kagawa
  • Actuator with number of stator teeth equal to number of rotor poles
    Patent number: 6756871
    Abstract: An inexpensive, small, high-efficiency actuator having a single-phase claw pole structure permits easy assembly or winding and enables a rotor to act in a fixed direction by detent torque even in a deenergization mode.
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: June 29, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Sakae Fujitani, Masaki Kagawa
  • Electric rotary machine having bobbins with thin-walled extensions of flange
    Patent number: 6737782
    Abstract: An electric rotary machine includes a stator comprising: a stator ring; a plurality of discrete salient poles each comprising a pole tooth, disposed inside the stator ring thereby forming a magnetic circuit, and fixed by a molding resin injected inside the stator ring; and a plurality of bobbins each constituting the salient pole, adapted to lodge the pole tooth fitted thereinto and to have a magnet wire wound thereon, and each including its outward-positioned flange having at its respective both ends two flexible thin-walled extensions which are adapted to securely hold the wound magnet wire in place, stay unbent during winding operation, and which are bent when the salient poles are put inside the stator ring.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: May 18, 2004
    Assignee: Minebea Co., Ltd.
    Inventors: Yuzuru Suzuki, Seiichi Matsuura, Masato Hata