Patents by Inventor Yoshinobu Honkura

Yoshinobu Honkura 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).

  • Patent number: 10607755
    Abstract: Anisotropic rare earth magnet powder particles include R2TM14B1-type crystals of a tetragonal compound consisting of one or more rare earth element, B, and one or more transition element, and enveloping layers containing at least Nd and Cu. Surfaces of the R2TM14B1-type crystals are enveloped by the enveloping layers. The particles has an average crystal grain diameter of 0.05 to 1 ?m. The particles contain, when the whole particles are taken as 100 atomic %, 11.5 to 15 atomic % of total rare earth element (Rt); 5.5 to 8 atomic % of B; and about 0.05 atomic % to about 2 atomic % of Cu. The powder particles have an atomic ratio of Cu, which is a ratio of the total number of Cu atoms to a total number of atoms of Rt, falling within the range of 1 to 6%. The powder particles do not include dysprosium Dy, Tb, Ho and Ga. Coercivity of the magnetic powder is more than 955 kA/m.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: March 31, 2020
    Assignee: AICHI STEEL CORPORATION
    Inventors: Yoshinobu Honkura, Chisato Mishima, Masao Yamazaki
  • Patent number: 10473732
    Abstract: A magnetometer provides a newly designed signal processing circuit that can reduce noise and increase the magnetic sensitivity by means of reducing the noise of GND electrode potential occurred at the timing when the pulse current passes through the magnetic wire. It is characterized by preparing a differential element with a neutral coil electrode, a differential sample holding circuit and a differential amplifier circuit.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: November 12, 2019
    Assignee: Magnedesign Corporation
    Inventor: Yoshinobu Honkura
  • Publication number: 20190310324
    Abstract: The invention relates to a three-dimensional magnetic field detection device (1) which comprises three soft-magnetic bodies (21, 22) and a magnetic field detection element (3, 12, 13, 14) comprising three GSR elements. For three axial directions that are orthogonal to each other at an origin point that is the center point of measurement, the invention measures, for a first axial direction, a first-axial-direction magnetic field using two elements sandwiching the origin point, measures, for a second axial direction, a second-axial-direction magnetic field through disposing one element at the position of the origin point, and measures, for a third axial direction, a third-axial-direction magnetic field through combining the two elements for the first axial direction and the three soft-magnetic bodies and forming two crank-shaped magnetic circuits having point symmetry.
    Type: Application
    Filed: June 13, 2019
    Publication date: October 10, 2019
    Applicant: ASAHI INTECC CO., LTD.
    Inventor: Yoshinobu HONKURA
  • Publication number: 20190302195
    Abstract: In a GSR sensor element, tm and ti of rising pulse detection are close, and the induced voltage is significantly high at tm. Thus, a variation due to the magnetic field cannot be ignored. To remove an induced voltage from an output voltage and achieve a GSR sensor with a rising pulse detection system. On the basis of the knowledge that the polarity of an induced voltage becomes opposite relative to a direction of the current flowing in a magnetic wire, if one coil includes therein two magnetic wires in which currents of opposite polarities flow, an induced current is cancelled, allowing for the detection of a voltage in proportion to a magnetic field.
    Type: Application
    Filed: June 14, 2019
    Publication date: October 3, 2019
    Applicant: ASAHI INTECC CO., LTD.
    Inventors: Yoshinobu HONKURA, Eiki KIKUCHI, Kazue KUDO, Junichi TANABE, Shinpei HONKURA
  • Patent number: 10398341
    Abstract: The gradiometers of the present invention are developed by applying GSR sensors to have the detectability of magnetic field same to that of SQUID without a cryogenic temperature retainer. Plural GSR elements are fitted on two parallel convex line guides of the gradiometer board using two parallel concave line guides of the GSR element board to keep the parallel among wires direction of GSR elements perfectly and to cancel the outside magnetic field noise without a magnetic shield room.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: September 3, 2019
    Assignee: MAGNEDESIGN CORPORATION
    Inventor: Yoshinobu Honkura
  • Patent number: 9925023
    Abstract: An implant overdenture system is used to fix an implant overdenture onto alveolar ridge by the support of implants. The implant overdenture has artificial teeth, a denture base, and magnetic assemblies. The implants each have an implant body and a keeper. A largest circumscribed circle diameter d1 in an outer shape of a surface-to-be-attracted of the keeper is equal to or larger than ?1.8 mm, and a largest diameter d2 of the implant body is equal to or larger than ?1.2 mm and equal to or less than ?3.5 mm, and these largest diameters have a relationship expressed by d1/d2?1.5.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: March 27, 2018
    Assignee: AICHI STEEL CORPORATION
    Inventors: Kazuo Arai, Yoshinobu Honkura, Yasuhiro Takeuchi, Rudi Wigianto
  • Patent number: 9857436
    Abstract: The magnetometers possess detector part with a magnetic wire sensitive to magnetic field consisting of a domain structure of the surface domain with circular spin alignment and core domain with longitudinal spin alignment and micro coil surrounding its magnetic wire to pick up the change of longitudinal magnetizing caused by spin rotation in surface domain with circular spin alignment called as GSR effect excited by pulse with frequency of 0.5 GHz to 4 GHz. Peak coil voltage is detected by a circuit characterized with pulse generator, GSR element, Buffer circuit, sample holding circuit, amplifier circuit and means to invert it to external magnetic field. The induced coil voltage caused by parasitic coil capacitance and wiring loop is vanished by combination coil of right and left turn coil. The magnetometers can provide lower noise, wide measuring range with a small size detector part and is applied to smartphones, wearable computer and so on.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: January 2, 2018
    Assignee: MAGNEDESIGN CORPORATION
    Inventor: Yoshinobu Honkura
  • Patent number: 9799446
    Abstract: A production method for an anisotropic bonded magnet includes: filling the annular cavity with a magnet raw material including one or more types of rare-earth anisotropic magnet powder and a binder resin; applying aligning magnetic fields to the magnet raw material being aligned in the softened or molten binder resin, the aligning magnetic fields are applied from an even number of aligning magnetic pole bodies arranged around outer periphery of the annular cavity such that directions of magnetic fields are alternated; subjecting the magnet raw material to a molding to form a compact; rotating the aligning magnetic pole bodies in circumferential direction for a predetermined angle; and applying demagnetization magnetic fields to the compact from the aligning magnetic pole bodies during the alignment step. The demagnetization magnetic fields are in directions for cancelling magnetization of the compact caused by the aligning magnetic fields.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: October 24, 2017
    Assignee: AICHI STEEL CORPORATION
    Inventors: Yoshinobu Honkura, Hironari Mitarai, Hiroshi Matsuoka, Masayuki Kato, Ikuzou Okumura
  • Publication number: 20170221618
    Abstract: Anisotropic rare earth magnet powder particles include R2TM14B1-type crystals of a tetragonal compound consisting of one or more rare earth element, B, and one or more transition element, and enveloping layers containing at least Nd and Cu. Surfaces of the R2TM14B1-type crystals are enveloped by the enveloping layers. The particles has an average crystal grain diameter of 0.05 to 1 ?m. The particles contain, when the whole particles are taken as 100 atomic %, 11.5 to 15 atomic % of total rare earth element (Rt); 5.5 to 8 atomic % of B; and about 0.05 atomic % to about 2 atomic % of Cu. The powder particles have an atomic ratio of Cu, which is a ratio of the total number of Cu atoms to a total number of atoms of Rt, falling within the range of 1 to 6%. The powder particles do not include dysprosium Dy, Tb, Ho and Ga. Coercivity of the magnetic powder is more than 955 kA/m.
    Type: Application
    Filed: April 11, 2017
    Publication date: August 3, 2017
    Inventors: Yoshinobu Honkura, Chisato Mishima, Masao Yamazaki
  • Publication number: 20170221631
    Abstract: A production method for an anisotropic bonded magnet includes: filling the annular cavity with a magnet raw material including one or more types of rare-earth anisotropic magnet powder and a binder resin; applying aligning magnetic fields to the magnet raw material being aligned in the softened or molten binder resin, the aligning magnetic fields are applied from an even number of aligning magnetic pole bodies arranged around outer periphery of the annular cavity such that directions of magnetic fields are alternated; subjecting the magnet raw material to a molding to form a compact; rotating the aligning magnetic pole bodies in circumferential direction for a predetermined angle; and applying demagnetization magnetic fields to the compact from the aligning magnetic pole bodies during the alignment step. The demagnetization magnetic fields are in directions for cancelling magnetization of the compact caused by the aligning magnetic fields.
    Type: Application
    Filed: April 11, 2017
    Publication date: August 3, 2017
    Inventors: Yoshinobu Honkura, Hironari Mitarai, Hiroshi Matsuoka, Masayuki Kato, Ikuzou Okumura
  • Publication number: 20170176547
    Abstract: A magnetometer provides a newly designed signal processing circuit that can reduce noise and increase the magnetic sensitivity by means of reducing the noise of GND electrode potential occurred at the timing when the pulse current passes through the magnetic wire. It is characterized by preparing a differential element with a neutral coil electrode, a differential sample holding circuit and a differential amplifier circuit.
    Type: Application
    Filed: December 14, 2016
    Publication date: June 22, 2017
    Inventor: Yoshinobu HONKURA
  • Patent number: 9666341
    Abstract: A method for production of an anisotropic bonded magnet includes: aligning magnetic pole bodies which include an even number of permanent magnets arranged uniformly around an outer periphery of an annular cavity filled with magnetic raw material, aligning magnetic fields to cause rare-earth anisotropic magnet powder to be semi-radially aligned; compressively molding the semi-radially aligned magnet raw material to obtain an annular compact; discharging the compact from the annular cavity; demagnetizing causing the aligning magnetic pole bodies to relatively move only in circumferential direction with respect to the compact after the molding step thereby to apply demagnetization magnetic fields to the compact; The demagnetization magnetic fields are applied from the aligning magnetic pole bodies with opposite poles to those during the alignment step, and the demagnetization magnetic fields are in directions for cancelling the magnetization of the compact caused by the aligning magnetic fields.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: May 30, 2017
    Assignee: AICHI STEEL CORPORATION
    Inventors: Yoshinobu Honkura, Hironari Mitarai, Hiroshi Matsuoka, Masayuki Kato, Ikuzou Okumura
  • Patent number: 9640319
    Abstract: The anisotropic rare earth magnet powder of the present invention includes powder particles having R2TM14B1-type crystals of a tetragonal compound of a rare earth element (R), boron (B), and a transition element (TM) having an average crystal grain diameter of 0.05 to 1 ?m, and enveloping layers containing at least a rare earth element (R?) and copper (Cu) and enveloping surfaces of the crystals. Owing to the presence of the enveloping layers, coercivity of the anisotropic rare earth magnet powder can be remarkably enhanced without using a scarce element such as Ga and Dy.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: May 2, 2017
    Assignee: AICHI STEEL CORPORATION
    Inventors: Yoshinobu Honkura, Chisato Mishima, Masao Yamazaki
  • Publication number: 20170100051
    Abstract: The gradiometers of the present invention are developed by applying GSR sensors to have the detectability of magnetic field same to that of SQUID without a cryogenic temperature retainer. Plural GSR elements are fitted on two parallel convex line guides of the gradiometer board using two parallel concave line guides of the GSR element board to keep the parallel among wires direction of GSR elements perfectly and to cancel the outside magnetic field noise without a magnetic shield room.
    Type: Application
    Filed: October 7, 2016
    Publication date: April 13, 2017
    Inventor: Yoshinobu HONKURA
  • Publication number: 20170101697
    Abstract: A tension annealing treatment consisting of a furnace and the operation method can improve magnetic properties of magnetic wire with a diameter of under 20 ?m and achieve continuous operation without wire breakage by controlling the temperature and tensile stress in the furnace with designated values accurately by means of a wire diameter measuring device, tension measuring device, plural capstans and tension rollers between plural capstans installed in the furnace. The interval between a wire supply bobbin and a wire winding up bobbin is divided into serval parts which are controlled to have same conveyance speed and tensile stress to dissolve the deference of each other by controlling the rotary speed of capstans and the tension loaded by tension rollers.
    Type: Application
    Filed: October 10, 2016
    Publication date: April 13, 2017
    Applicant: MAGNEDESIGN CORPORATION
    Inventor: Yoshinobu HONKURA
  • Publication number: 20160329150
    Abstract: The present invention provides a magnetic wire alignment machine and its method to produce magnetic wire alignment on the substrate at the fine interval without twist stress. The magnetic wires can be allied along the groove on the substrate with the accuracy of ±1 ?m by the very small interval by means of a precision feeding device which can adjust the parallel displacement between the wire as a basic line and the grove observed by a microscope. The magnetic wires cut under uniform tension are temporally fixed on the grooves on the substrate by the magnetic force and cured by the resin without twist stress.
    Type: Application
    Filed: May 6, 2016
    Publication date: November 10, 2016
    Applicant: MAGNEDESIGN CORPORATION
    Inventor: Yoshinobu HONKURA
  • Publication number: 20160238673
    Abstract: The magnetometers possess detector part with a magnetic wire sensitive to magnetic field consisting of a domain structure of the surface domain with circular spin alignment and core domain with longitudinal spin alignment and micro coil surrounding its magnetic wire to pick up the change of longitudinal magnetizing caused by spin rotation in surface domain with circular spin alignment called as GSR effect excited by pulse with frequency of 0.5 GHz to 4 GHz. Peak coil voltage is detected by a circuit characterized with pulse generator, GSR element, Buffer circuit, sample holding circuit, amplifier circuit and means to invert it to external magnetic field. The induced coil voltage caused by parasitic coil capacitance and wiring loop is vanished by combination coil of right and left turn coil. The magnetometers can provide lower noise, wide measuring range with a small size detector part and is applied to smartphones, wearable computer and so on.
    Type: Application
    Filed: February 12, 2016
    Publication date: August 18, 2016
    Applicant: MAGNEDESIGN CORPORATION
    Inventor: Yoshinobu HONKURA
  • Patent number: 9404980
    Abstract: The magnetometers possess a detector part with a magnetosensitive material sensitive to the magnetic field and coil surrounding its magnetosensitive material to pick-up the magnetic field, a pulse generator circuit supplies pulse current to the magnetic material, a sample holding circuit including with an electronic switch synchronized with pulse timing for switching on/off and holding capacitance to charge electricity produced by the pickup coil during the switch on period, and an amplifier circuit amplifies the holding capacitance voltage. Magnetometers possess a Buffer circuit connecting the output side of the pickup coil with the input side of the Buffer circuit and connects the output side of the Buffer circuit with the input side of the electronic switch to transfer the pulse signal voltage induced in the pickup coil from the input side to the output side keeping the pulse signal voltage of the outside at the same level as the inside.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: August 2, 2016
    Assignee: MAGNEDESIGN CORPORATION
    Inventor: Yoshinobu Honkura
  • Publication number: 20160116551
    Abstract: A technique is provided which reduces the coil pitch and increases the number of coil turns in an MI element and allows for high sensitivity and miniaturization. The MI element is configured such that a magnetic wire and a coil wound around the magnetic wire are disposed on an electrode wiring substrate. When manufacturing the coil, a three-layer structure of the coil and thin film coil strips formed by a vapor deposition process are focused on thereby to allow the coil pitch to be 14 micrometers or less. The three-layer structure comprises coil lower portions of a recessed shape, coil upper portions of a protruding shape, and through-hole portions that connect the coil lower portions with the coil upper portions.
    Type: Application
    Filed: June 20, 2014
    Publication date: April 28, 2016
    Applicant: MAGNEDESIGN CORPORATION
    Inventor: Yoshinobu HONKURA
  • Patent number: 9312055
    Abstract: A production method for a case-integrated bonded magnet includes: filling a tubular cavity with a magnet raw material that includes a rare-earth magnet powder and a thermosetting resin binder; heating the magnet raw material to cause the thermosetting resin softened or melted while compressively molding the magnet raw material to obtain a tubular compact; discharging the tubular compact from the tubular cavity while press-fitting the tubular compact into a metal tubular case having an inner peripheral surface coaxial with the tubular cavity; and heat-curing the tubular compact with the tubular case to cure the thermosetting resin. The tubular compact press-fitted into the tubular case is thermally cured thereby causing the tubular compact to transform to a tubular bonded magnet, which expands unexpectedly due to heat.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: April 12, 2016
    Assignee: AICHI STEEL CORPORATION
    Inventors: Yoshinobu Honkura, Hironari Mitarai, Hiroshi Matsuoka, Masayuki Kato, Ikuzou Okumura