Patents by Inventor Taichi Okada

Taichi Okada 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: 11892048
    Abstract: A spring steel wire includes a main body made of a steel and having a line shape, and an oxidized layer covering an outer peripheral surface of the main body. The steel constituting the main body contains not less than 0.5 mass % and not more than 0.7 mass % C, not less than 1 mass % and not more than 2.5 mass % Si, not less than 0.2 mass % and not more than 1 mass % Mn, and not less than 0.5 mass % and not more than 2 mass % Cr, with the balance being Fe and unavoidable impurities. The steel constituting the main body has a pearlite structure. The oxidized layer has a thickness of not less than 2 ?m and not more than 5 ?m. The oxidized layer contains not less than 60 mass % Fe3O4.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: February 6, 2024
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hiromu Izumida, Yoshiki Natsumeda, Taichi Okada
  • Publication number: 20220186803
    Abstract: A spring steel wire includes a main body made of a steel and having a line shape, and an oxidized layer covering an outer peripheral surface of the main body. The steel constituting the main body contains not less than 0.5 mass % and not more than 0.7 mass % C, not less than 1 mass % and not more than 2.5 mass % Si, not less than 0.2 mass % and not more than 1 mass % Mn, and not less than 0.5 mass % and not more than 2 mass % Cr, with the balance being Fe and unavoidable impurities. The steel constituting the main body has a pearlite structure. The oxidized layer has a thickness of not less than 2 ?m and not more than 5 ?m. The oxidized layer contains not less than 60 mass % Fe3O4.
    Type: Application
    Filed: June 15, 2020
    Publication date: June 16, 2022
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Hiromu IZUMIDA, Yoshiki NATSUMEDA, Taichi OKADA
  • Patent number: 11339855
    Abstract: An object of the present invention is to provide a tensioner that has a reduced number of components and weight, and is easy to assemble. The tensioner has a base member loosely fitted into an open rear end of a cylindrical plunger with a closed front end against the resiliency of a biasing means accommodated inside the plunger. The tensioner includes a plunger stopper mechanism configured such that an engaging part formed on the base member detachably engages an engaging groove provided on an inner circumferential surface of the plunger directly or via another member.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: May 24, 2022
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Taichi Okada, Masanori Watanabe
  • Patent number: 11242916
    Abstract: An object of the present invention is to provide a tensioner that has a reduced number of components and lighter weight and is easy to assemble. The tensioner according to the present invention is configured such that a base member is detachably and mechanically joined to a rear end opening of a cylindrical plunger with a closed front end against the resilience of biasing means that is accommodated inside the plunger such as to be freely extend and contract. The joint between the plunger and the base member is a mechanical connection that is one of a thread engagement, a press-fit, and a pin connection.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: February 8, 2022
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Taichi Okada, Masanori Watanabe
  • Publication number: 20200256433
    Abstract: An object of the present invention is to provide a tensioner that has a reduced number of components and lighter weight and is easy to assemble. The tensioner according to the present invention is configured such that a base member is detachably and mechanically joined to a rear end opening of a cylindrical plunger with a closed front end against the resilience of biasing means that is accommodated inside the plunger such as to be freely extend and contract. The joint between the plunger and the base member is a mechanical connection that is one of a thread engagement, a press-fit, and a pin connection.
    Type: Application
    Filed: December 27, 2019
    Publication date: August 13, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Taichi Okada, Masanori Watanabe
  • Publication number: 20200149614
    Abstract: An object of the present invention is to provide a tensioner that has a reduced number of components and weight, and is easy to assemble. The tensioner has a base member loosely fitted into an open rear end of a cylindrical plunger with a closed front end against the resiliency of a biasing means accommodated inside the plunger. The tensioner includes a plunger stopper mechanism configured such that an engaging part formed on the base member detachably engages an engaging groove provided on an inner circumferential surface of the plunger directly or via another member.
    Type: Application
    Filed: October 17, 2019
    Publication date: May 14, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Taichi Okada, Masanori Watanabe
  • Patent number: 9588424
    Abstract: A photosensitive resin composition is prepared by dispersing at least one of a hydrophobic polymer and a mixture of an oil-soluble photopolymerization initiator and a water-insoluble or sparingly water-soluble compound having at least one photoactive, ethylenically unsaturated group in an aqueous solution that contains both a water-soluble polymer and a diazo resin is obtained by condensing a water-soluble salt of an optionally substituted 4-diazodiphenylamine with formaldehyde in the presence of sulfuric acid and phosphoric acid. This photosensitive resin composition gives a photosensitive film having excellent stability over time and a wide exposure latitude. By adding a specific fluorine compound to the photosensitive resin composition, a screen plate has an excellent discharge performance.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: March 7, 2017
    Assignee: SUNTYPE CO., LTD.
    Inventors: Yoshio Umeda, Kenji Ota, Yuichi Ono, Taichi Okada, Yukina Kuwahara, Takafumi Somei, Setsuka Nakajima, Masataka Miyazaki, Toru Mori, Suguru Komatsu, Michihiro Iljima
  • Publication number: 20150212413
    Abstract: A photosenstive resin composition is prepared by dispersing at least one of a hydrophobic polymer and a mixture of an oil-soluble photopolymerization initiator and a water-insoluble or sparingly water-soluble compound having at least one photoactive, ethylenically unsaturated group in an aqueous solution that contains both a water-soluble polymer and a diazo resin is obtained by condensing a water-soluble salt of an optionally substituted 4-diazodiphenylamine with formaldehyde in the presence of sulfuric acid and phosphoric acid. This photosensitive resin composition gives a photosensitive film having excellent stability over time and a wide exposure latitude. By adding a specific fluorine compound to the photosensitive resin composition, a screen plate has an excellent discharge performance.
    Type: Application
    Filed: September 25, 2012
    Publication date: July 30, 2015
    Inventors: Yoshio Umeda, Kenji Ota, Yuichi Ono, Taichi Okada, Yukina Kuwahara, Takafumi Somei, Setsuka Nakajima, Masataka Miyazaki, Toru Mori, Suguru Komatsu, Michihiro Iijima