Patents Assigned to Sumida Corporation
  • VARIABLE INDUCTOR
    Publication number: 20110234354
    Abstract: A variable inductor 10 includes: a first coil 1; a second coil 2 which emanates a magnetic flux in a cancelling direction with respect to the magnetic flux generated in the first coil 1; a movable core 5 positioned between the first coil 1 and the second coil 2 for carrying out opening & closing operation; and a magnetic core 3a, 3b having a closed magnetic-path structure which involves the first coil 1, the second coil 2 and the movable core 5. The magnetic core 3a includes a magnetic-core center-core portion 4a around which the first coil 1 is wound and the second magnetic core 2 includes a magnetic-core center-core portion 4b around which the second coil 2 is wound.
    Type: Application
    Filed: June 6, 2011
    Publication date: September 29, 2011
    Applicant: SUMIDA CORPORATION
    Inventor: Mitsugu KAWARAI
  • Inverter circuit
    Patent number: 8013536
    Abstract: From the individual small areas of a conductor pattern arranged on the back side of a circuit board, there are individually extended leader patterns, which are midway led by through holes to the surface side of the circuit board. The individual leader patterns led to the surface side are connected with a terminal portion on the low-voltage side through jumper pads. The desired small areas are enabled to function by shorting the jumper pads with solder. The individual small areas are constituted to have a capacity of 1 pF, when caused to function, and they have such a capacity as a pattern capacitor as is proportional to the number of the shorted jumper pads.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: September 6, 2011
    Assignee: Sumida Corporation
    Inventor: Takeshi Hatakeyama
  • Composite magnetic device
    Patent number: 7999646
    Abstract: To provide a composite magnetic device having characteristics of two magnetic elements, being capable of reducing a manufacturing cost, and preferably enabling the respective magnetic elements to easily exhibit the same characteristics.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: August 16, 2011
    Assignee: Sumida Corporation
    Inventor: Satoshi Minamidate
  • COMPOSITE MAGNETIC MATERIAL AND MAGNETIC ELEMENT
    Publication number: 20110168939
    Abstract: The object of the present invention is to provide a composite magnetic material having well-balanced magnetic properties and chemical properties, and a magnetic element using thereof. Concretely, the present provides the composite magnetic material comprising a binder and a magnetic powder contains followings: Mn not less than 0.25 wt % and not larger than 3 wt %, Si not less than 1 wt % and not larger than 7 wt %, Cr not less than 2 wt % and not larger than 8 wt %, and the rest of Fe and inevitable impurities with respect to the total weight of a magnetic powder material, and a ratio of powder particles having the major/minor axis is not less than 2 is not larger than 5% of the total powder particles.
    Type: Application
    Filed: February 10, 2011
    Publication date: July 14, 2011
    Applicant: SUMIDA CORPORATION
    Inventors: Akihiko NAKAMURA, Keisuke WATANABE
  • Composite magnetic sheet and production method thereof
    Patent number: 7976720
    Abstract: The present invention provides a composite magnetic sheet having a high magnetic permeability, to be produced easily at a low cost. The composite magnetic sheet includes magnetic substance powders and polytetrafluoroethylene powders.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: July 12, 2011
    Assignee: Sumida Corporation
    Inventor: Shinichi Sakamoto
  • Inductor
    Patent number: 7969266
    Abstract: Provided is an inductor capable of adjusting an inductance in dozens of nH increments without requiring a large number of components. The inductor includes: a conductor; a first core body and a second core body each having an opposed surface, the opposed surface of the first core body and the opposed surface of the second core body facing each other so as to enclose the conductor; and a holding part provided with a slide surface for varying an opposed area of the opposed surfaces of the first core body and the second core body, for holding at least one of the first core body and the second core body at a desired position.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: June 28, 2011
    Assignee: Sumida Corporation
    Inventors: Kan Sano, Yuichiro Urano
  • Inductance element
    Patent number: 7940153
    Abstract: An inductance element has a first core portion having a winding frame portion; a coil provided on the winding frame portion; a ring-shaped member having an insertion hole to dispose the first core portion therein; and a terminal member having an bonding arm to be fixed to the ring-shaped member via an adhesive member, and a mounting portion.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: May 10, 2011
    Assignee: Sumida Corporation
    Inventor: Tsutomu Watanabe
  • COIL
    Publication number: 20110090035
    Abstract: In the winding wire at the winding completion end side, two wires are piled up vertically and wound together from the inner circumferential side towards the outer circumferential side. The winding wire at the winding start end side that has remained on the inner circumferential side is drawn forth from the inner circumferential side to the outer circumferential side so as to form a curve along the flat surface of the coil. In the crossing portions of the winding wire at the winding completion end side and the winding wire at the winding start end side, the two wires of each winding wire are superimposed and caused to cross each other in a state in which the wires are laid down transversely.
    Type: Application
    Filed: September 15, 2010
    Publication date: April 21, 2011
    Applicant: SUMIDA CORPORATION
    Inventors: Shuichi KIKUCHI, Fumihito Meguro, Yoshiyuki Hatayama
  • Self-excited inverter driving circuit
    Patent number: 7928661
    Abstract: To provide a low-cost self-excited inverter driving circuit exhibiting an excellent operational efficiency. A main inverter section is so constructed that a part of output signals is fed back by a resonance loop circuit to cause a self-excited oscillation to occur in the vicinity of a resonance frequency decided by leakage inductors and capacitors on the secondary side of a high voltage transformer, thereby performing an inverter operation. It is further arranged that a halt interval setting signal, which is generated by a triangular wave forming circuit and a control section, is applied to the main inverter section, thereby halting the inverter operation in accordance with the halt interval setting signal.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: April 19, 2011
    Assignee: Sumida Corporation
    Inventor: Hiroyuki Miyazaki
  • Coil device for antenna and antenna system for rear window of vehicle
    Patent number: 7920041
    Abstract: In a coil device for an antenna, a wide surface of a connector connecting section and a mounting surface of a fixing section are substantially vertically arranged. A connecter terminal can take a first arrangement or a second arrangement to a resin member. In the first arrangement the connector terminal can take, the connector connecting section is positioned on one end side in the width direction of the resin member, and in the second arrangement, the connector connecting section is positioned on the other end side in the width direction of the resin member by turning the connector connecting section in the first arrangement 180 degrees.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: April 5, 2011
    Assignee: Sumida Corporation
    Inventors: Takanobu Rokuka, Shigeru Mahara
  • Magnetic element
    Patent number: 7893807
    Abstract: A magnetic element including a first core and a second core each of which has a winding core provided with a flange portion having a flange surface at least at one end thereof; and an intermediate core to form a closed magnetic circuit which is disposed between said first core and said second core in a manner being integrally connected with said first core and said second core.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: February 22, 2011
    Assignee: Sumida Corporation
    Inventor: Kan Sano
  • Magnetic element
    Patent number: 7872556
    Abstract: A magnetic assembly includes a mounting substrate and a magnetic element mounted on the mounting substrate. The magnetic element includes a drum core provided with a flange portion at each end of a winding shaft, a coil wound on the winding shaft, and a shield core engaged with the drum core, the shield core including an engagement portion having a shape that corresponds to the shape of a portion of the outer circumference of at least one of the flange portions so that the engagement portion mates with the at least one flange portion.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: January 18, 2011
    Assignee: Sumida Corporation
    Inventor: Kan Sano
  • MAGNETIC COMPONENT
    Publication number: 20110006867
    Abstract: Provided is a magnetic component capable of omitting a process of binding both ends of a lead wire to terminals and having stable connection between the lead wire and the terminals. The magnetic component is provided with a core including a spool portion around which a lead wire is wound, and external terminals to which the both ends of the lead wire are connected. Each of the external terminals includes a protruding portion (terminal end fixing portion) which is capable of receiving movement of the lead wire in a direction opposite to a winding direction, and the external terminals and the lead wire are connected to each other.
    Type: Application
    Filed: August 29, 2008
    Publication date: January 13, 2011
    Applicant: SUMIDA CORPORATION
    Inventors: Juichi Oki, Yoshiyuki Hatayama
  • Coil Component And Method For Manufacturing Coil Component
    Publication number: 20110006870
    Abstract: In an inductor including a coil, a drum type core constituted by a soft magnetic metal material and a resin material, and a filling member constituted by a soft magnetic metal material and a resin material in which a magnetic flux excited by aforesaid coil goes through aforesaid drum type core and aforesaid filling member serially, the present invention constitutes an inductor, wherein aforesaid drum type core is constituted by injection molding so as to include a receiving portion, aforesaid coil is arranged in aforesaid receiving portion, and aforesaid filling member is filled therein.
    Type: Application
    Filed: June 6, 2008
    Publication date: January 13, 2011
    Applicant: SUMIDA CORPORATION
    Inventor: Shinichi Sakamoto
  • Coil component
    Patent number: 7859377
    Abstract: A coil component is provided, and the coil component for an inductor is deformable dependent on flex of a flexible printed board due to elapse of time when mounted thereon, and has high resistance against dropping impact and has an inductance value. The coil component includes an anisotropic compound magnetic sheet which is layered on at least any one or both of the upper surface and the lower surface of an air core coil formed spirally in a plane and which is composed of flat or needle-shaped soft magnetic metal powder, which has a major axis and a minor axis and is dispersed in a resin material, the major axis of which corresponds to an in-plane direction of the air core coil.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: December 28, 2010
    Assignee: Sumida Corporation
    Inventor: Mitsugu Kawarai
  • ROTATION ANGLE DETECTING SENSOR
    Publication number: 20100308808
    Abstract: The present invention is made to provide a rotation angle detecting sensor capable of being miniaturized. The rotation angle detecting sensor includes a rotating body; an encoder structure 3 having n (n represents a positive integer) cycles of phases each ranging from phase 0° to phase 360°, each phase being formed by periodically changing the width of the conductor pattern; and a sensor body having a plurality of inductance elements C1, C2, C3, C4 and disposed opposing the encoder structure 3 with a space. The cycle number n of the phase of the encoder structure 3 is a positive integer equal to or greater than three, the plurality of inductance elements C1, C2, C3, C4 have a phase difference of 90 degrees therebetween, and the two adjacent inductance elements are disposed apart from each other by a space of at least half a phase of the encoder structure 3.
    Type: Application
    Filed: November 10, 2008
    Publication date: December 9, 2010
    Applicant: SUMIDA CORPORATION
    Inventors: Tetsuo Yamagata, Hiroaki Nagasawa
  • Magnetic element
    Patent number: 7821369
    Abstract: To provide a magnetic element the ends of the coil of which can be drawn out from the core easily, is compact, and further, is one in which magnetic saturation does not arise easily. A magnetic element has a core unit provided with a wound coil, a center core 105 inserted into the interior of the inner periphery of the coil, planar cores disposed at both ends of the center core, and a side core disposed between the planar cores and on the outside periphery of the coil. The side core is disposed so as to form an open portion between the two planar cores around the coil, with a recessed portion formed in a surface of the side core facing the coil in which the coil is partially contained.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: October 26, 2010
    Assignee: Sumida Corporation
    Inventor: Kan Sano
  • Three-axis antenna, antenna unit and receiving device
    Patent number: 7796091
    Abstract: To attain sensitivity not deviating in any of XYZ directions. A three-axis antenna with a cross-shaped core 2 having a pair of X-axis arms 22a, 22b projecting in the X-axis direction in an orthogonal coordinate system and a pair of Y-axis arms 23a, 23b projecting in the Y-axis direction orthogonal to aforementioned X-axis direction, and having Z-axis winding wire 26 provided in a substantially rectangular frame shape outside the head sections of aforementioned X-axis arms 22a, 22b and the head sections of aforementioned Y-axis arms 23a, 23b. Aforementioned Z-axis winding wire is housed in a case having a bottom so as to cover the entire head surfaces of X-axis arms 22a, 23b and head surfaces of Y-axis arms 23a, 23b in aforementioned cross-shaped core 2.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: September 14, 2010
    Assignee: Sumida Corporation
    Inventor: Hozumi Ueda
  • Cold cathode tube drive device
    Patent number: 7791284
    Abstract: A cold-cathode tube driving apparatus wherein the number of booster transformers has been reduced and the increase in installation space and in cost has been suppressed. This cold-cathode tube driving apparatus comprises a booster transformer (2); a plurality of cold-cathode tubes (3-1 to 3-N); and a time division control circuit (control circuit 6 and time division FETs 4-1 to 4-N) for lighting one or more of the plurality of cold-cathode tubes (3-1 to 3-N) in a time division manner by use of a high frequency voltage after boosted by the booster transformer (2).
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: September 7, 2010
    Assignee: Sumida Corporation
    Inventors: Tadashi Otsuki, Toru Takahara, Akio Niekawa
  • MOTOR
    Publication number: 20100219725
    Abstract: A motor having a sensor to detect a rotation angle that enables reduction in size and weight is provided. The motor may include a reduction gear having a planetary gear, which is provided between a rotor and a rotation axis of the motor, a conductor pattern periodically changing in width, which is formed on a surface perpendicular to the rotation axis of the rotor, and a rotation angle detection sensor, which is provided to oppose the conductor pattern.
    Type: Application
    Filed: September 1, 2008
    Publication date: September 2, 2010
    Applicant: SUMIDA CORPORATION
    Inventors: Tetsuo Yamagata, Hiroaki Nagasawa