Patents by Inventor Hiroshi Takezaki

Hiroshi Takezaki 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: 20200367737
    Abstract: A cover (220, 320, 420) for covering a part in a circumferential direction of an outer circumferential surface of a rigid endoscope 10 includes an outer cover portion (222, 322, 422) having flexibility and an inner cover portion (223, 323, 423) provided on an inner surface of the outer cover portion (222, 322, 422) and configured to define a flow passage for a washing fluid to be supplied to an observation window portion 14 of the rigid endoscope 10, and the outer cover portion(222, 322, 422) is mounted onto the outer circumferential surface of the rigid endoscope 10 by the outer cover portion (222, 322, 422) bending.
    Type: Application
    Filed: August 2, 2017
    Publication date: November 26, 2020
    Applicants: Nagasaki University, TryTec Co., Ltd.
    Inventors: Keitaro MATSUMOTO, Takeshi NAGAYASU, Katsunori TAKAGI, Hiroshi TAKEZAKI, Junji MORI
  • Patent number: 10668609
    Abstract: A hand tool includes a trigger manually operated by an operator, a tool body configured to movably support the trigger, a biasing member configured to generate a biasing force for biasing the trigger in a direction opposite to a operation direction of the trigger, and a contacting member operated by a biasing force of the biasing member to act on the trigger or tool body. The biasing member and the contacting member are assembled integrally with the tool body or the trigger.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: June 2, 2020
    Assignee: MAX CO., LTD.
    Inventors: Hiroshi Tanaka, Tohru Uchiyama, Mitsugu Takezaki, Hiroki Yamamoto
  • Publication number: 20200040204
    Abstract: A method of producing polybutylene terephthalate resin shaped moldings includes supplying a 3D printer with a polybutylene terephthalate resin powder mixture that contains 100 parts by weight of a polybutylene terephthalate resin powder material having a mean diameter of more than 1 ?m and 100 ?m or less, a uniformity coefficient of 4 or less, and a terminal carboxyl group quantity of 35 eq/t or more and 50 eq/t or less, and 0.1 to 5 parts by weight of inorganic particles having a mean diameter of 20 to 500 nm.
    Type: Application
    Filed: October 2, 2019
    Publication date: February 6, 2020
    Inventors: Kei Watanabe, Kazusada Takeda, Yosuke Nishimura, Hiroshi Takezaki, Hisashi Miyama, Mikiya Nishida
  • Patent number: 10260116
    Abstract: An apparatus for shaving a tap hole surface of a blast furnace or the like wherein efficiency can be improved, and a worker can be freed from physically burdensome work in the vicinity of the lower furnace wall of a blast furnace under high temperature. The apparatus includes a surface shaving unit having smoothing bits, and a rotating mechanism unit that, when the surface shaving unit is pressed against the tap hole surface, rotates the surface shaving unit, by utilizing the pressing force, by a predetermined angle in a predetermined direction substantially parallel to the surface, and holds the surface shaving unit at the rotated position. The rotating mechanism unit eliminates the need for work such that every time a conventional surface shaving unit is separated from the tap hole surface after being pressed against the surface, a worker manually rotates the surface shaving unit by a predetermined angle.
    Type: Grant
    Filed: December 25, 2015
    Date of Patent: April 16, 2019
    Assignee: TRYTEC CO., LTD.
    Inventors: Hiroshi Takezaki, Shinichi Fujisawa
  • Patent number: 10239970
    Abstract: Fine polymer particles made by a method include producing an emulsion in a liquid prepared by dissolving and mixing a polymer A and a polymer B in organic solvents in which a solution phase composed primarily of the polymer A and a solution phase composed primarily of the polymer B are formed as separate phases, wherein the solvents in the two phases resulting from the phase separation are substantially identical to each other, and contacting the emulsion with a poor solvent for the polymer A to precipitate the polymer A, wherein the particles have a glass transition point of 150° C. or more and 400° C. or less, an average particle diameter of 1 ?m or more to 100 ?m or less, and a particle diameter distribution index of the particles is 2 or less, wherein the polymer A is nonvinyl type polymer.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: March 26, 2019
    Assignee: Toray Industries, Inc.
    Inventors: Itaru Asano, Yuji Echigo, Hiroshi Takezaki
  • Publication number: 20180338927
    Abstract: In a system where phase separation into two phases occurs when an ether cellulose derivative (A), a polymer (B) different from the ether cellulose derivative (A), and an alcohol solvent (C) are mixed together, the two phases including a solution phase mainly containing the ether cellulose derivative (A) and a solution phase mainly containing the polymer (B), the two separated phases containing approximately the same solvent, an emulsion is formed and brought into contact with a poor solvent (D) to provide an ether cellulose derivative microparticle having an average particle diameter of 1 to 1,000 ?m, a linseed oil absorption of 50 to 1,000 mL/100 g, and an average surface pore size of 0.05 to 5 ?m.
    Type: Application
    Filed: October 26, 2016
    Publication date: November 29, 2018
    Inventors: Takahiko Otsubo, Kotoe Ohta, Yuji Echigo, Hiroshi Takezaki, Suguru Takaki, Satoshi Minakami, Akinori Ito, Hisashi Miyama
  • Patent number: 10125252
    Abstract: By first forming an emulsion in a system that separates into two phases which include a solution phase containing an ethylene-vinyl alcohol copolymer (A) as the main component and a solution phase containing a polymer (B) different from the ethylene-vinyl alcohol copolymer (A) as the main component when the copolymer (A), the polymer (B), and an organic solvent (C) having an SP value of 20 (J/cm3)1/2 to 30 (J/cm3)1/2 are dissolved and mixed together, and then causing the ethylene-vinyl alcohol copolymer (A) to precipitate as microparticles by bringing a poor solvent (D) of the ethylene-vinyl alcohol copolymer (A) into contact with the emulsion, it is possible to obtain ethylene-vinyl alcohol copolymer microparticles that have a narrow particle size distribution wherein the particle size distribution index in a dry-powder state is 2 or less, have a true spherical particle shape, and exhibit excellent re-dispersibility into liquid.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: November 13, 2018
    Assignee: Toray Industries, Inc.
    Inventors: Takahiko Otsubo, Itaru Asano, Hiroshi Takezaki
  • Patent number: 10072377
    Abstract: A fiber reinforced composite material having high interlaminar toughness and compressive strength under wet heat conditions, as well as an epoxy resin composition for production thereof and a prepreg producible from the epoxy resin composition is described. The prepreg includes at least constituents [A], [B], and [C] as specified below and reinforcement fiber, wherein 90% or more of constituent [C] exists in the depth range accounting for 20% of the prepreg thickness from the prepreg surface: [A] epoxy resin; [B] epoxy resin curing agent; and [C] polymer particles insoluble in epoxy resin.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: September 11, 2018
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Yuko Shimizu, Nobuyuki Tomioka, Shirou Honda, Maki Nagano, Yuji Echigo, Hiroshi Takezaki, Junko Kawasaki, Hiroshi Taiko
  • Publication number: 20180186926
    Abstract: A polyester resin powder mixture has a small average particle size, excellent powder flowability, and high strength after molding. The polyester resin powder mixture is obtained by blending 0.1-5 parts by weight of silica microparticles having an average particle size of 20-500 nm in 100 parts by weight of a polyester resin powder having an average particle size that is over 1 ?m and is less than or equal to 100 ?m, and that has a uniformity of 4 or less.
    Type: Application
    Filed: April 27, 2016
    Publication date: July 5, 2018
    Inventors: Kei Watanabe, Kazusada Takeda, Yosuke Nishimura, Hiroshi Takezaki, Hisashi Miyama, Mikiya Nishida
  • Patent number: 9988501
    Abstract: A method of producing polymer particles includes, in a system in which a polymer A and a polymer B are dissolved in and mixed with an organic solvent to undergo phase separation into two phases which are a solution phase containing the polymer A as a major component and a solution phase containing the polymer B as a major component, continuously adding an emulsion including the polymer A, the polymer B and the organic solvent, and a poor solvent for the polymer A to a vessel continuously to allow the polymer A to precipitate; and separating polymer A particles from the vessel continuously.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: June 5, 2018
    Assignee: Toray Industries, Inc.
    Inventors: Yoshinori Kondo, Yuji Echigo, Akira Kitamura, Hiroshi Takezaki
  • Publication number: 20180105669
    Abstract: Carbon-black-encapsulated polyamide microparticles are obtained by bringing a poor solvent of polyamide into contact with an emulsion to cause carbon-black-encapsulated polyamide to be precipitated, the emulsion being formed in a system that has separated into two solution phases when carbon black is mixed with a polymer solution prepared by dissolving a polyamide, a polymer (B) different from the polyamide, and an organic solvent (C), the polymer (B) being the main component in one of the phases, and, in the other of the phases, the polyamide being the main component and the carbon black being selectively distributed; wherein it is possible to obtain black polyamide microparticles having a number-average particle size of 1-200 ?m and a temperature difference between the melting temperature and the cooling crystallization temperature of 25° C. or more, the microparticles being suitable for use in powder bed fusion additive manufacturing.
    Type: Application
    Filed: December 9, 2015
    Publication date: April 19, 2018
    Inventors: Takahiko Otsubo, Hisashi Miyama, Hiroshi Takezaki
  • Patent number: 9920193
    Abstract: Provided are: fine vinylidene fluoride resin particles which are solid and have an average particle diameter of 0.3 ?m or more but less than 100 ?m, a particle diameter distribution index of 1-2, a repose angle of less than 40°, and an average sphericity of 80 or more said fine vinylidene fluoride particles being suitable for coating materials and coating applications; and a method for producing the fine vinylidene fluoride resin particles.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: March 20, 2018
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Yuji Echigo, Makiko Saito, Itaru Asano, Yoko Wakahara, Hiroshi Takezaki
  • Patent number: 9862804
    Abstract: A polyarylene sulfide resin powder/grain composition in which 100 weight parts of polyarylene sulfide resin powder/grain material whose average particle diameter exceeds 1 ?m and is less than or equal to 100 ?m and whose uniformity degree is less than or equal to 4 has been blended with 0.1 to 5 weight parts of an inorganic fine particle having an average particle diameter greater than or equal to 20 nm and less than or equal to 500 nm.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: January 9, 2018
    Assignee: Toray Industries, Inc.
    Inventors: Kei Watanabe, Kazusada Takeda, Hiroshi Takezaki, Kei Makita, Yosuke Nishimura
  • Patent number: 9828477
    Abstract: A prepreg containing a carbon fiber [A] and a thermosetting resin [B], and in addition, satisfying at least one of the following (1) and (2). (1) a thermoplastic resin particle or fiber [C] and a conductive particle or fiber [D] are contained, and weight ratio expressed by [compounding amount of [C] (parts by weight)]/[compounding amount of [D] (parts by weight)] is 1 to 1000. (2) a conductive particle or fiber of which thermoplastic resin nucleus or core is coated with a conductive substance [E] is contained.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: November 28, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Nobuyuki Arai, Norimitsu Natsume, Kenichi Yoshioka, Junko Kawasaki, Hiroshi Takezaki
  • Patent number: 9822228
    Abstract: A prepreg containing a carbon fiber [A] and a thermosetting resin [B], and in addition, satisfying at least one of the following (1) and (2). (1) a thermoplastic resin particle or fiber [C] and a conductive particle or fiber [D] are contained, and weight ratio expressed by [compounding amount of [C] (parts by weight)]/[compounding amount of [D] (parts by weight)] is 1 to 1000. (2) a conductive particle or fiber of which thermoplastic resin nucleus or core is coated with a conductive substance [E] is contained.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: November 21, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Nobuyuki Arai, Norimitsu Natsume, Kenichi Yoshioka, Junko Kawasaki, Hiroshi Takezaki
  • Patent number: 9777130
    Abstract: Polyphenylene sulfide microparticles have a linseed oil absorption amount of 40 to 1,000 mL/100 g and a number average particle diameter of 1 to 200 ?m. The porous PPS microparticles have a large specific surface area and therefore promote fusion of particles when molded into various molded bodies by applying thermal energy, thus enabling formation or molding of a coating layer of particles at a lower temperature in a shorter time. The porous PPS microparticles have a porous shape and therefore enable scattering light in multiple directions and suppression of specific reflection of reflected light in a specific direction, thus making it possible to impart shading effect and matte effect when added to a medium.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: October 3, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Takahiko Otsubo, Itaru Asano, Yoko Wakahara, Hiroshi Takezaki
  • Publication number: 20170204484
    Abstract: An apparatus for shaving a tap hole surface of a blast furnace or the like wherein efficiency can be improved, and a worker can be freed from physically burdensome work in the vicinity of the lower furnace wall of a blast furnace under high temperature. The apparatus includes a surface shaving unit having smoothing bits, and a rotating mechanism unit that, when the surface shaving unit is pressed against the tap hole surface, rotates the surface shaving unit, by utilizing the pressing force, by a predetermined angle in a predetermined direction substantially parallel to the surface, and holds the surface shaving unit at the rotated position. The rotating mechanism unit eliminates the need for work such that every time a conventional surface shaving unit is separated from the tap hole surface after being pressed against the surface, a worker manually rotates the surface shaving unit by a predetermined angle.
    Type: Application
    Filed: December 25, 2015
    Publication date: July 20, 2017
    Applicant: TRYTEC CO., LTD.
    Inventors: Hiroshi TAKEZAKI, Shinichi FUJISAWA
  • Patent number: 9676936
    Abstract: The invention provides a prepreg that can give a fiber-reinforced composite material exhibiting stable and excellent interlaminar fracture toughness and impact resistance under wide molding conditions. The prepreg includes at least a reinforcement fiber [A], a thermosetting resin [B], and the following component [C] wherein 90% or more of the material [C] is present inside a region of the prepreg that extends from any surface of the prepreg to a prepreg site having, from the surface, a depth of 20% of the thickness of the prepreg. The component [C] satisfies requirements that (i) the storage elastic modulus G? of the material constituting the particles is more than 1 MPa, and 70 MPa or less at 180° C., and that (ii) the ratio of the storage elastic modulus G? of the material constituting the particles at 160° C. to the storage elastic modulus G? of the material at 200° C. ranges from 1 to 5; and is insoluble in the thermosetting resin [B].
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: June 13, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Yuko Shimizu, Hiroshi Kobayashi, Nobuyuki Tomioka, Hiroshi Takezaki, Shirou Honda
  • Patent number: 9676937
    Abstract: [Problem] To provide: a fiber-reinforced composite material having both Mode I interlaminar fracture toughness and compressive strength under wet heat conditions; an epoxy resin composition for producing the fiber-reinforced composite material; and a prepreg produced using the epoxy resin composition. [Solution] An epoxy resin composition comprising at least the following constituents [A], [B] and [C]: [A] an epoxy resin; [B] composite polyamide microparticles which satisfy such a requirement (b1) the materials constituting the particles are a polyamide (B1) and a thermoplastic elastomer resin (B2), such a requirement (b2) that the melting point or the glass transition temperature of the polyamide (B1) is higher than 100° C. and such a requirement (b3) the number average particle diameter is 0.1 to 100 ?m; and [C] a curing agent.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: June 13, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Hiroshi Kobayashi, Takahiko Otsubo, Hiroshi Takezaki, Nobuyuki Tomioka
  • Patent number: 9617395
    Abstract: The production of polyamide 1010 polymer particles, in which polyamide 1010 resin, a different polymer B and an organic solvent are dissolved and mixed and thereupon an emulsion is formed within a system for phase separation into two phases, being a solution phase having the polyamide 1010 resin as the main component and a solution phase having the polymer B as the main component, and thereafter a poor solvent of the polyamide 1010 resin is brought into contact therewith to precipitate the polyamide 1010 resin, wherein the formation of the emulsion is carried out at a temperature of 100° C. or higher, thereby making it possible to obtain highly crystalline polyamide 1010 particles having a high sphericity.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: April 11, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Makiko Saito, Hiroshi Takezaki