Patents by Inventor Katsuhiro Oikawa

Katsuhiro Oikawa 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: 20240081867
    Abstract: Provided is a fixture rod that is excellent in bonding strength between a core material and a reinforcing fiber layer and has high rigidity and high durability against a deformation load. A fixture rod according to one embodiment of the present disclosure comprises: a core member containing a resin; and a reinforcing fiber layer provided on the core member, and is configured such that the resin of the core member and a resin of the reinforcing fiber layer are the same resin, or the resin of the core member and the resin of the reinforcing fiber layer are different resins, and a critical surface tension of each of the resin of the core member and the resin of the reinforcing fiber layer is 20 mN/m or more.
    Type: Application
    Filed: October 12, 2021
    Publication date: March 14, 2024
    Inventors: Katsuhiro OIKAWA, Takuji KAWAMURA
  • Publication number: 20240058038
    Abstract: Provided is a fixture rod having improved bonding strength between a core member and a reinforcing fiber layer, high rigidity, and high durability against a deformation load. The fixture rod according to one embodiment of the present disclosure comprises: a core member containing fibers; and a reinforcing fiber layer provided on the core member, and a part of the fibers of the core member is exposed from the core member, and a part of the fibers with the exposed part is embedded in the reinforcing fiber layer.
    Type: Application
    Filed: October 12, 2021
    Publication date: February 22, 2024
    Inventors: Katsuhiro OIKAWA, Takuji KAWAMURA
  • Publication number: 20230329756
    Abstract: A fixture rod which reduces damage at the time of fixing with a screw, has high rigidity, and has high durability against a deformation load is provided. A fixture rod according to one embodiment of the present disclosure is configured to comprise a core member and a reinforcing fiber layer provided on the core member.
    Type: Application
    Filed: September 10, 2021
    Publication date: October 19, 2023
    Inventors: Katsuhiro OIKAWA, Takuji KAWAMURA
  • Patent number: 11497202
    Abstract: The present invention provides a reel leg fixing apparatus having a sufficient strength in the coupling between the operation nut and the movable hood while reducing the thickness and the weight of the movable hood efficiently and effectively. In the reel leg fixing apparatus according to the present invention, the movable hood and the operation nut are coupled together when a locking portion bent and provided at an end of the movable hood is engaged with a recess at an end of the operation nut. The movable hood is formed of a prepreg sheet as a fiber-reinforced resin member including reinforcement fibers impregnated with a synthetic resin, and the reinforcement fibers oriented at least in the axial direction extend continuously at least in a coupling between the movable hood and the operation nut.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: November 15, 2022
    Assignee: GLOBERIDE, INC.
    Inventors: Hideyuki Naito, Katsuhiro Oikawa, Masaru Akiba, Yoshiharu Kiyota
  • Patent number: 10952417
    Abstract: One object is to provide a reel leg fixing apparatus including a hood portion having an efficiently reduced thickness and weight while maintaining a sufficient strength. Another object of the present invention is to provide a reel leg fixing apparatus including a hood portion having a reduced thickness and weight while efficiently ensuring necessary strength at relevant portions, and a method of fabricating the reel leg fixing apparatus. Still another object of the present invention is to provide a reel leg fixing apparatus including a hood portion having an oblique end that allows weight reduction and maintains a sufficient strength.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: March 23, 2021
    Assignee: GLOBERIDE, Inc.
    Inventors: Katsuhiro Oikawa, Hideyuki Naito, Koichi Ito
  • Patent number: 10321669
    Abstract: One object is to provide a reel seat allowing reinforcement of a hood for retaining a reel leg while maintaining the appearance and restricting the increase in weight, and a fishing rod having such a reel seat. A reel seat according to an embodiment of the present invention includes a fixed hood for retaining one end of a reel leg on the reel seat body, and a fiber-reinforced resin sheet is provided so as to extend over an outer circumference of the fixed hood and an outer circumference of the reel seat body. The reinforcement fibers may extend over the entire length of the fiber-reinforced resin sheet. The reinforcement fibers in the fiber-reinforced resin sheet extend in a direction slanted or orthogonal with respect to a longitudinal direction of the rod.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: June 18, 2019
    Assignee: Globeride, Inc.
    Inventors: Masaru Akiba, Katsuhiro Oikawa
  • Publication number: 20170280694
    Abstract: One object is to provide a reel leg fixing apparatus including a hood portion having an efficiently reduced thickness and weight while maintaining a sufficient strength. Another object of the present invention is to provide a reel leg fixing apparatus including a hood portion having a reduced thickness and weight while efficiently ensuring necessary strength at relevant portions, and a method of fabricating the reel leg fixing apparatus. Still another object of the present invention is to provide a reel leg fixing apparatus including a hood portion having an oblique end that allows weight reduction and maintains a sufficient strength.
    Type: Application
    Filed: June 14, 2017
    Publication date: October 5, 2017
    Inventors: Katsuhiro OIKAWA, Hideyuki NAITO, Koichi ITO
  • Publication number: 20160286773
    Abstract: The present invention provides a reel leg fixing apparatus having a sufficient strength in the coupling between the operation nut and the movable hood while reducing the thickness and the weight of the movable hood efficiently and effectively. In the reel leg fixing apparatus according to the present invention, the movable hood and the operation nut are coupled together when a locking portion bent and provided at an end of the movable hood is engaged with a recess at an end of the operation nut. The movable hood is formed of a prepreg sheet as a fiber-reinforced resin member including reinforcement fibers impregnated with a synthetic resin, and the reinforcement fibers oriented at least in the axial direction extend continuously at least in a coupling between the movable hood and the operation nut.
    Type: Application
    Filed: March 2, 2016
    Publication date: October 6, 2016
    Inventors: Hideyuki NAITO, Katsuhiro Oikawa, Masaru Akiba, Yoshiharu Kiyota
  • Publication number: 20150272099
    Abstract: One object is to provide a reel leg fixing apparatus including a hood portion having an efficiently reduced thickness and weight while maintaining a sufficient strength. Another object of the present invention is to provide a reel leg fixing apparatus including a hood portion having a reduced thickness and weight while efficiently ensuring necessary strength at relevant portions, and a method of fabricating the reel leg fixing apparatus. Still another object of the present invention is to provide a reel leg fixing apparatus including a hood portion having an oblique end that allows weight reduction and maintains a sufficient strength.
    Type: Application
    Filed: March 19, 2015
    Publication date: October 1, 2015
    Inventors: Katsuhiro Oikawa, Hideyuki Naito, Koichi Ito
  • Publication number: 20150181852
    Abstract: One object is to provide a reel seat allowing reinforcement of a hood for retaining a reel leg while maintaining the appearance and restricting the increase in weight, and a fishing rod having such a reel seat. A reel seat according to an embodiment of the present invention includes a fixed hood for retaining one end of a reel leg on the reel seat body, and a fiber-reinforced resin sheet is provided so as to extend over an outer circumference of the fixed hood and an outer circumference of the reel seat body. The reinforcement fibers may extend over the entire length of the fiber-reinforced resin sheet. The reinforcement fibers in the fiber-reinforced resin sheet extend in a direction slanted or orthogonal with respect to a longitudinal direction of the rod.
    Type: Application
    Filed: December 29, 2014
    Publication date: July 2, 2015
    Inventors: Masaru Akiba, Katsuhiro Oikawa
  • Publication number: 20150181851
    Abstract: One object is to provide a reel seat allowing reinforcement of a hood for retaining a reel leg while maintaining the appearance and restricting the increase in weight, and a fishing rod having such a reel seat. A reel seat according to an embodiment of the present invention includes a fixed hood for retaining one end of a reel leg on the reel seat body, and a fiber-reinforced resin sheet is provided so as to extend over an outer circumference of the fixed hood and an outer circumference of the reel seat body. The reinforcement fibers may extend over the entire length of the fiber-reinforced resin sheet. The reinforcement fibers in the fiber-reinforced resin sheet extend in a direction slanted or orthogonal with respect to a longitudinal direction of the rod.
    Type: Application
    Filed: December 29, 2014
    Publication date: July 2, 2015
    Inventors: Masaru Akiba, Katsuhiro Oikawa
  • Patent number: 7305792
    Abstract: Where a super-elastic alloy is used as a core material, boundary separation can be prevented on substantial deflection. The super-elastic alloy is used as the core material, an outside layer made with fiber-reinforced resin is provided outside except the tip part region of the core material, and a resin-rich layer greater in resin ratio than the outside layer is provided between the outside layer and the core material so as to be adjacent to the core material.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: December 11, 2007
    Assignee: Daiwa Seiko, Inc.
    Inventors: Yoshinao Kato, Takenori Ohtsu, Hideyuki Naito, Tetsuo Akutsu, Katsuhiro Oikawa, Hidenori Kosai
  • Publication number: 20050178040
    Abstract: Where a super-elastic alloy is used as a core material, boundary separation can be prevented on substantial deflection. The super-elastic alloy is used as the core material, an outside layer made with fiber-reinforced resin is provided outside except the tip part region of said core material, and a resin-rich layer greater in resin ratio than said outside layer is provided between said outside layer and the core material so as to be adjacent to the core material.
    Type: Application
    Filed: January 31, 2005
    Publication date: August 18, 2005
    Inventors: Yoshinao Kato, Takenori Ohtsu, Hideyuki Naito, Tetsuo Akutsu, Katsuhiro Oikawa, Hidenori Kosai