Patents by Inventor Shuichi Tada

Shuichi Tada 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: 11424055
    Abstract: Provided are a SmFeN magnetic powder which is superior not only in water resistance and corrosion resistance but also in hot water resistance, and a method of preparing the powder. The present invention relates to a method of preparing a magnetic powder, comprising: plasma-treating a gas; surface-treating a SmFeN magnetic powder with the plasma-treated gas; and forming a coat layer on the surface of the surface-treated SmFeN magnetic powder.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: August 23, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Rieko Yoshimoto, Satoshi Yamanaka, Shuichi Tada, Hideaki Yoshiwara
  • Publication number: 20220157520
    Abstract: A method of producing a compound for bonded magnets, the method including: heat-curing a thermosetting resin and a curing agent having a ratio of the number of reactive groups of the curing agent to the number of reactive groups of the thermosetting resin of at least 2 but not higher than 11 to obtain an additive for bonded magnets; and kneading the additive for bonded magnets, magnetic powder, and a thermoplastic resin to obtain a compound for bonded magnets in which a filling ratio of the magnetic powder is at least 91.5% by mass.
    Type: Application
    Filed: November 16, 2021
    Publication date: May 19, 2022
    Applicant: NICHIA CORPORATION
    Inventors: Satoshi YAMANAKA, Takayuki YANO, Shuichi TADA, Masahiro ABE, Kenta IWAI
  • Publication number: 20220157500
    Abstract: The present invention relates to a composition for bonded magnets having good hot water resistance and a method of manufacturing the composition. The method of manufacturing a composition for bonded magnets includes: obtaining a first kneaded mixture by kneading a rare earth-iron-nitrogen-based magnetic powder and an acid-modified polypropylene resin; and obtaining a second kneaded mixture by kneading the first kneaded mixture with a polypropylene resin and an amorphous resin having a glass transition temperature of 120° C. or higher and 250° C. or lower, wherein, with respect to 100 parts by weight of the rare earth-iron-nitrogen-based magnetic powder, the amount of the acid-modified polypropylene resin is 3.5 parts by weight or greater and less than 10.4 parts by weight, and the total amount of the polypropylene resin and the amorphous resin is 0.35 part by weight or greater and less than 3.88 parts by weight.
    Type: Application
    Filed: January 28, 2022
    Publication date: May 19, 2022
    Applicant: NICHIA CORPORATION
    Inventors: Shuichi TADA, Satoshi YAMANAKA
  • Patent number: 11270820
    Abstract: The present invention relates to a composition for bonded magnets having good hot water resistance and a method of manufacturing the composition. The method of manufacturing a composition for bonded magnets includes: obtaining a first kneaded mixture by kneading a rare earth-iron-nitrogen-based magnetic powder and an acid-modified polypropylene resin; and obtaining a second kneaded mixture by kneading the first kneaded mixture with a polypropylene resin and an amorphous resin having a glass transition temperature of 120° C. or higher and 250° C. or lower, wherein, with respect to 100 parts by weight of the rare earth-iron-nitrogen-based magnetic powder, the amount of the acid-modified polypropylene resin is 3.5 parts by weight or greater and less than 10.4 parts by weight, and the total amount of the polypropylene resin and the amorphous resin is 0.35 part by weight or greater and less than 3.88 parts by weight.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: March 8, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Shuichi Tada, Satoshi Yamanaka
  • Publication number: 20210287832
    Abstract: The present invention relates to a composite component including a metal component having a substantially cylindrical shape or a substantially annular shape, and a ring-shaped bonded magnet disposed on the outer periphery of the metal component, the ring-shaped bonded magnet containing a thermoplastic resin, magnetic particles, and rubber particles.
    Type: Application
    Filed: June 2, 2021
    Publication date: September 16, 2021
    Applicant: NICHIA CORPORATION
    Inventors: Rie YOSHIDA, Masahiro ABE, Michiya KUME, Kohei IHARA, Shuichi TADA
  • Patent number: 11056255
    Abstract: The present invention relates to a composite component including a metal component having a substantially cylindrical shape or a substantially annular shape, and a ring-shaped bonded magnet disposed on the outer periphery of the metal component, the ring-shaped bonded magnet containing a thermoplastic resin, magnetic particles, and rubber particles.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: July 6, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Rie Yoshida, Masahiro Abe, Michiya Kume, Kohei Ihara, Shuichi Tada
  • Publication number: 20200211742
    Abstract: The present disclosure aims to provide a bonded magnet having good magnetic properties and a method of preparing the bonded magnet. The present disclosure provides a method of preparing a bonded magnet, including: a first compression step of compressing a magnetic powder having an average particle size of 10 ?m or less while magnetically orienting it to obtain a first molded article; a second compression step of bringing the first molded article into contact with a thermosetting resin having a viscosity of 200 mPa·s or less, followed by compression to obtain a second molded article; and a heat treatment step of heat treating the second molded article.
    Type: Application
    Filed: December 27, 2019
    Publication date: July 2, 2020
    Applicant: NICHIA CORPORATION
    Inventors: Takashi ASADA, Shuichi TADA
  • Publication number: 20200105445
    Abstract: The present invention provides a bonded magnet having good heat resistance. The present invention relates to a bonded magnet containing a SmFeN magnetic powder, nylon 12, and a hexafluoroisopropanol-unextractable component. The present invention also relates to a method of preparing a bonded magnet, including: bringing a raw material bonded magnet containing a SmFeN magnetic powder and nylon 12 into contact with an amorphizing agent; and heat-treating the raw material bonded magnet in contact with the amorphizing agent.
    Type: Application
    Filed: September 27, 2019
    Publication date: April 2, 2020
    Applicant: NICHIA CORPORATION
    Inventor: Shuichi TADA
  • Publication number: 20200098495
    Abstract: Provided are a SmFeN magnetic powder which is superior not only in water resistance and corrosion resistance but also in hot water resistance, and a method of preparing the powder. The present invention relates to a method of preparing a magnetic powder, comprising: plasma-treating a gas; surface-treating a SmFeN magnetic powder with the plasma-treated gas; and forming a coat layer on the surface of the surface-treated SmFeN magnetic powder.
    Type: Application
    Filed: September 25, 2019
    Publication date: March 26, 2020
    Applicant: NICHIA CORPORATION
    Inventors: Rieko YOSHIMOTO, Satoshi YAMANAKA, Shuichi TADA, Hideaki YOSHIWARA
  • Publication number: 20190027286
    Abstract: The present invention relates to a composition for bonded magnets having good hot water resistance and a method of manufacturing the composition. The method of manufacturing a composition for bonded magnets includes: obtaining a first kneaded mixture by kneading a rare earth-iron-nitrogen-based magnetic powder and an acid-modified polypropylene resin; and obtaining a second kneaded mixture by kneading the first kneaded mixture with a polypropylene resin and an amorphous resin having a glass transition temperature of 120° C. or higher and 250° C. or lower, wherein, with respect to 100 parts by weight of the rare earth-iron-nitrogen-based magnetic powder, the amount of the acid-modified polypropylene resin is 3.5 parts by weight or greater and less than 10.4 parts by weight, and the total amount of the polypropylene resin and the amorphous resin is 0.35 part by weight or greater and less than 3.88 parts by weight.
    Type: Application
    Filed: July 19, 2018
    Publication date: January 24, 2019
    Applicant: NICHIA CORPORATION
    Inventors: Shuichi TADA, Satoshi YAMANAKA
  • Publication number: 20180315526
    Abstract: The present invention relates to a composite component including a metal component having a substantially cylindrical shape or a substantially annular shape, and a ring-shaped bonded magnet disposed on the outer periphery of the metal component, the ring-shaped bonded magnet containing a thermoplastic resin, magnetic particles, and rubber particles.
    Type: Application
    Filed: April 27, 2018
    Publication date: November 1, 2018
    Applicant: NICHIA CORPORATION
    Inventors: Rie YOSHIDA, Masahiro ABE, Michiya KUME, Kohei IHARA, Shuichi TADA
  • Patent number: 9597828
    Abstract: In a method for manufacturing a cylindrical bonded magnet, a molding space having a cylindrical shape is filled with a bonded magnet composition containing a magnetic material and a resin. The magnetic material disposed in the molding space is magnetically oriented using an orientation magnet. The orientation magnet includes a first permanent magnet and a second permanent magnet. The first and second permanent magnets are disposed such that same poles are opposite each other in the axial direction.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: March 21, 2017
    Assignee: NICHIA CORPORATION
    Inventors: Shinji Yoshima, Muneo Yamamoto, Shuichi Tada, Akihiro Imayama
  • Patent number: 7140201
    Abstract: A hydrous silica gel is dehydrated by freezing, thawing, and removing water separated by thawing, thereby yielding silica particles. In addition, the silica particles thus formed is washed and fired, thereby producing a synthetic quartz glass power. A water glass is dealkalized, an oxidizing agent and an acid are added, the mixture thus formed is passed through a hydrogen type cation exchange resin, the aqueous silica solution thus formed is then gelled, and the gelled material is then washed and fired, thereby producing a synthetic quartz powder. Silica is sequentially held for a predetermined time at each temperature range of 150 to 400° C., 500 to 700° C., and 1,100 to 1,300° C., thereby producing a quartz glass.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: November 28, 2006
    Assignees: M. Watanabe & Co., Ltd., Asahi Denka Kogyo Kabushiki Kaisha
    Inventors: Kunio Sugiyama, Shuichi Tada, Jinichi Omi, Tadahiro Nakada, Hiroshi Morita, Masaki Kusuhara, Hiroyuki Watanabe, Hirofumi Uehara, Keiko Sanpei
  • Publication number: 20040213724
    Abstract: High purity synthetic quartz glass particles are derived from alkali metal silicate and have a total amount of metal impurities content of at least 1 &mgr;g/g and, in particular, have oxygen-deficient defects. The high-purity synthetic quartz glass particles having high viscosity similar to natural quartz and high-purity similar to known synthetic quartz can be provided at a low cost.
    Type: Application
    Filed: March 17, 2004
    Publication date: October 28, 2004
    Inventors: Masaki Kusuhara, Hiroyuki Watanabe, Hirofumi Uehara, Keiko Sanpei, Naoyasu Kurita, Shuichi Tada, Jinichi Omi, Makio Takahashi, Hiroshi Morita
  • Publication number: 20030005724
    Abstract: A hydrous silica gel is dehydrated by freezing, thawing, and removing water separated by thawing, thereby yielding silica particles. In addition, the silica particles thus formed is washed and fired, thereby producing a synthetic quartz glass power.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 9, 2003
    Inventors: Kunio Sugiyama, Shuichi Tada, Jinichi Omi, Tadahiro Nakada, Hiroshi Morita, Masaki Kusuhura, Hiroyuki Watanabe, Hirofumi Uehara, Keiko Sanpei