Patents by Inventor Wataru Yagi

Wataru Yagi 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).

  • Publication number: 20240155795
    Abstract: Provided is a heat-dissipating waterproof structure having both excellent heat dissipation ability and high waterproofness. A heat-dissipating waterproof structure (300) provided between a top part (203) of a casing (200) to accommodate a heat source (102) and the heat source (102) includes a water receiving part (301) that guides a liquid having entered into the casing (200) through an outlet (203A) provided in the top part (203) of the casing (200), and a water guide channel (302) that guides the liquid having been guided by the water receiving part (301) to be discharged to outside of a space where the heat source (102) is accommodated, and the water receiving part (301) has at least a sloping surface which gradually becomes higher the further it is from being immediately above the heat source (102).
    Type: Application
    Filed: January 18, 2024
    Publication date: May 9, 2024
    Applicant: NEC Platforms, Ltd.
    Inventors: Takahiro Yagi, Kiyotaka Yokoyama, Akira Katsumata, Wataru Imura
  • Patent number: 7658538
    Abstract: A method for evaluating a solder joint portion by means of which a part and a substrate are joined to each other includes a preparation process for preparing the substrate including the solder joint portion, a thermal shock process for applying thermal shock to the solder joint portion multiple times, and an evaluation process for obtaining a change of a crystal grain size in the solder joint portion caused by the application of the thermal shock so as to evaluate a lifespan of the solder joint portion based on the change of the crystal grain size obtained.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: February 9, 2010
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Hirofumi Koike, Akikazu Matsumoto, Wataru Yagi, Takefumi Isogai, Yoshiharu Hirose, Hiroaki Kadoura, Juntaro Seki, Hisaaki Takao
  • Publication number: 20080240201
    Abstract: A method for evaluating a solder joint portion by means of which a part and a substrate are joined to each other includes a preparation process for preparing the substrate including the solder joint portion, a thermal shock process for applying thermal shock to the solder joint portion multiple times, and an evaluation process for obtaining a change of a crystal grain size in the solder joint portion caused by the application of the thermal shock so as to evaluate a lifespan of the solder joint portion based on the change of the crystal grain size obtained.
    Type: Application
    Filed: March 27, 2008
    Publication date: October 2, 2008
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Hirofumi KOIKE, Akikazu MATSUMOTO, Wataru YAGI, Takefumi ISOGAI, Yoshiharu HIROSE, Hiroaki KADOURA, Juntaro SEKI, Hisaaki TAKAO
  • Patent number: 7374814
    Abstract: A soft magnetic powder material includes an iron powder, and a plated layer formed on a surface of the iron powder and possessing a lubricating property. The plated layer includes a lubricant material and a matrix in which the lubricant material disperses. The soft magnetic powder material is manufactured by an electroless deposition process, by which a plated layer is formed by depositing, on a surface of an iron powder, at least one element building a matrix, along with a micro-powdered lubricant material.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: May 20, 2008
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Naoki Kamiya, Wataru Yagi
  • Publication number: 20070008235
    Abstract: An antenna device 1 has an antenna unit 2 which includes an antenna core member 5 including a soft magnetic member 51 having conductivity and a conductor member 6 which is attached to the antenna core member 5. At least part of the antenna core member 5 (for example, a core sheet 50A) is a sensor electrode which is able to detect an object. The sensor electrode is used as a sensor electrode such as a capacitance-operated sensor electrode. Thus, it is possible to provide an antenna device and a door handgrip apparatus having an antenna unit including an antenna core member which is shared for an antenna function and a sensor function.
    Type: Application
    Filed: April 15, 2004
    Publication date: January 11, 2007
    Applicant: AISEN SEIKI KABUSHIKI KAISHA
    Inventors: Makoto Tsukahara, Toshihiko Sakai, Wataru Yagi, Kiyokazu Ieda, Kota Maruyama
  • Patent number: 7015781
    Abstract: A magnetic circuit member contains spherical and/or caterpillar-shaped graphite dispersed in a ferritic iron matrix including silicon.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: March 21, 2006
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Akikazu Matsumoto, Wataru Yagi
  • Patent number: 6980171
    Abstract: An antenna is comprised of a core portion laminated by a magnetic ribbon through a deformable member and a coil portion wound around the core portion.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: December 27, 2005
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kota Maruyama, Wataru Yagi, Makoto Tsukahara
  • Publication number: 20050205848
    Abstract: A soft magnetic powder material includes an iron powder, and a plated layer formed on a surface of the iron powder and possessing a lubricating property. The plated layer includes a lubricant material and a matrix in which the lubricant material disperses. The soft magnetic powder material is manufactured by an electroless deposition process, by which a plated layer is formed by depositing, on a surface of an iron powder, at least one element building a matrix, along with a micro-powdered lubricant material.
    Type: Application
    Filed: March 8, 2005
    Publication date: September 22, 2005
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Naoki Kamiya, Wataru Yagi
  • Publication number: 20050099080
    Abstract: A rotor for an electric rotary machine includes a rotatable rotor body, a plurality of magnet portions provided at the rotor body in circumferential direction with a certain interval, and a supporting portion provided at the rotor body for supporting the plurality of the magnet portions. At least the supporting portion of the rotor body is made of ferritic cast iron as base material.
    Type: Application
    Filed: November 3, 2004
    Publication date: May 12, 2005
    Applicants: AISIN SEIKI KABUSHIKI KAISHA, AISIN TAKAOKA CO., LTD.
    Inventors: Akikazu Matsumoto, Wataru Yagi, Naoki Kamiya, Norihiro Akita, Takeshi Kamasaka
  • Publication number: 20050073804
    Abstract: A door handle apparatus includes a handle body attached to a door, a cover made of resin attached to the handle body and including a design layer decorated metallic like color tone, an antenna portion attached to a space formed between the handle body and the cover and having at least one of transmitting function and receiving function, and a metallic microparticle paint layer included in the design layer of the cover and formed by depositing metallic miroparticles by painting.
    Type: Application
    Filed: September 22, 2004
    Publication date: April 7, 2005
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Kota Maruyama, Wataru Yagi, Kiyokazu Ieda
  • Patent number: 6800146
    Abstract: A magnetic circuit member contains a matrix portion including iron and silicon; and graphite particles in the matrix. Each of the graphite particles has either a spherical shape or a compact vermicular shape. The inclusion of graphite particles having a relatively low conductivity in the matrix portion having a good magnetic property prevents eddy currents from forming in the magnetic circuit member in an alternating magnetic field, thus preserving the original magnetic property found in the absence of the alternating magnetic field. Each of the graphite particles has a spherical or compact vermicular shape that does not intercept magnetic flux passing through the material forming the magnetic circuit member. The graphite contained in the material improves liquidity of the melted material in casting, thus the magnetic circuit member can be manufactured by casting.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: October 5, 2004
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Akikazu Matsumoto, Wataru Yagi
  • Patent number: 6723179
    Abstract: A soft magnetism metal powder having a majority of particles, each of which, when cross-sectioned, has no greater than ten crystal particles on average, may be coated on an outer surface of each of the particles with a resistive material having a higher resistivity than the underlying parent phase. The soft magnetism metal powder may be prepared by heating a soft magnetism metal powder to a high temperature in a high temperature atmosphere, thereby reducing the number of crystal particles in each of the soft magnetism metal powder particles. A soft magnetism metal formed body may be prepared by pressing the soft magnetism metal particles at a sufficient temperature and pressure.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: April 20, 2004
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Wataru Yagi, Kota Maruyama, Yoshiharu Iyoda, Aiko Nakashima, Toshihisa Terazawa, Naoki Kamiya
  • Publication number: 20030184489
    Abstract: An antenna is comprised of a core portion laminated by a magnetic ribbon through a deformable member and a coil portion wound around the core portion.
    Type: Application
    Filed: March 25, 2003
    Publication date: October 2, 2003
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Kota Maruyama, Wataru Yagi, Makoto Tsukahara
  • Patent number: 6595073
    Abstract: A magnetostrictive device for a torque sensor which has a high sensor sensitivity whether the excitation frequency is in a high frequency range or in a low frequency range and can withstand excess load torques well, and also a method of easily manufacturing the device. In manufacturing the magnetostrictive device 1 for a torque sensor, which has a magnetic anisotropic portion 15 formed on the surface of a shaft body 10 thereof, the method of forming the magnetic anisotropic portion 15 comprises the steps of: forming spiral grooves in the surface of the shaft body 10 to form a plurality of troughs 16 and ridges 17 alternately; and directly applying a compressive stress only to the ridges 17 to cause deformations accompanied by plastic flow and to provide an almost planar plateau portion 171 at a crest portion of each of the ridges 17.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: July 22, 2003
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Wataru Yagi, Kouta Maruyama, Atsunao Itoh, Yoshio Kato
  • Publication number: 20030005978
    Abstract: A magnetic circuit member contains a matrix portion including iron and silicon; and graphite particles in the matrix. Each of the graphite particles has either a spherical shape or a compact vermicular shape. The inclusion of graphite particles having a relatively low conductivity in the matrix portion having a good magnetic property prevents eddy currents from forming in the magnetic circuit member in an alternating magnetic field, thus preserving the original magnetic property found in the absence of the alternating magnetic field. Each of the graphite particles has a spherical or compact vermicular shape that does not intercept magnetic flux passing through the material forming the magnetic circuit member. The graphite contained in the material improves liquidity of the melted material in casting, thus the magnetic circuit member can be manufactured by casting.
    Type: Application
    Filed: March 19, 2002
    Publication date: January 9, 2003
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Akikazu Matsumoto, Wataru Yagi
  • Patent number: 6400330
    Abstract: A bar antenna includes a single body ferromagnetic substance core, a bobbin which accommodates the core in a hollow space and has a plurality of coil windings, a case in which is positioned the core and the bobbin, and a potting material in the case and/or the bobbin. The potting material isolates the core from temperature changes, humidity changes and vibration.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: June 4, 2002
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kota Maruyama, Wataru Yagi, Eiji Mushiake, Wataru Kuwayama
  • Publication number: 20020046782
    Abstract: A soft magnetism metal powder having a majority of particles, each of which, when cross-sectioned, has no greater than ten crystal particles on average, may be coated on an outer surface of each of the particles with a resistive material having a higher resistivity than the underlying parent phase. The soft magnetism metal powder may be prepared by heating a soft magnetism metal powder to a high temperature in a high temperature atmosphere, thereby reducing the number of crystal particles in each of the soft magnetism metal powder particles. A soft magnetism metal formed body may be prepared by pressing the soft magnetism metal particles at a sufficient temperature and pressure.
    Type: Application
    Filed: October 16, 2001
    Publication date: April 25, 2002
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Wataru Yagi, Kota Maruyama, Yoshiharu Iyoda, Aiko Nakashima, Toshihisa Terazawa, Naoki Kamiya
  • Publication number: 20020033777
    Abstract: A bar antenna includes a single body ferromagnetic substance core, a bobbin which accommodates the core in a hollow space and has a plurality of coil windings, a case in which is positioned the core and the bobbin, and a potting material in the case and/or the bobbin. The potting material isolates the core from temperature changes, humidity changes and vibration.
    Type: Application
    Filed: June 13, 2001
    Publication date: March 21, 2002
    Inventors: Kota Maruyama, Wataru Yagi, Eiji Mushiake, Wataru Kuwayama
  • Patent number: 6030468
    Abstract: A cold accumulator filled with a cold accumulating material including 20 to 95 at % of at least one element selected from the group consisting of cerium (Ce), neodymium (Nd), praseodymium (Pr), magnetic body dysprosium (Dy), holmium (Ho), erbium (Er) and thulium (Tm), and 5 to 80 at % of an additive containing at least silver (Ag), thereby improving the specific heat at 10 to 30 K. The cold accumulating material can increase the efficiency of heat accumulating at 10 to 30 K, and the cold accumulator can be applied to refrigerators which generate refrigeration at cold low temperatures of 10 to 30 K.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: February 29, 2000
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Wataru Yagi, Masuo Yamada, Tetsuya Goto, Yoshiki Hoshino, Uichiro Mizutani
  • Patent number: 5588433
    Abstract: There is provided an ultrasonic diagnostic apparatus in which ultrasonic waves are transmitted and received in directions each along the associated one of a plurality of scan lines extending in a depth direction within the subject to obtain received signals, and data representative of displacement of the respective pixel points along each scan line within the subject are evaluated on the basis of the thus obtained received signals, thereby displaying an image based on the data representative of the displacement. According to the ultrasonic diagnostic apparatus, color data of a pixel train involved in the presence of displacement (color-displayed) appearing continuously by less than N pixels (typically, one pixel to two or three pixels at most) is replaced by data representative of the absence of the displacement (not color-displayed).
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: December 31, 1996
    Assignee: Fujitsu Limited
    Inventors: Takeshi Shirai, Wataru Yagi