Patents by Inventor Mitsutoshi Maeda

Mitsutoshi Maeda 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: 11220073
    Abstract: A method for manufacturing a composite material includes placing a netlike sheet material, through which a resin composition permeates, on reinforcing fiber substrates disposed on a forming die. The method includes covering the reinforcing fiber substrates disposed on the forming die and the bag surface-smoothing sheet with a bag film to form a sealed forming space between the bag film and the forming die. The method includes infusing a resin composition into the forming space to impregnate the reinforcing fiber substrates. The method includes curing the resin composition impregnated in the reinforcing fiber substrates. Warp yarns and weft yarns are disposed in a lattice pattern and, after placing the bag surface-smoothing sheet on the reinforcing fiber substrates so that the warp yarns and the weft yarns form acute angles with respect to corners of the reinforcing fiber substrates, the bag surface-smoothing sheet projecting from the reinforcing fiber substrates is bent.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: January 11, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kazuma Takeno, Mitsutoshi Maeda, Hiroshi Tokutomi, Tetsuya Sato
  • Patent number: 11040502
    Abstract: A method for producing a fiber-reinforced resin molded article includes disposing a suction medium, a resin barrier aeration medium and a fiber base material in a cavity such that the suction medium is disposed between an end part of the fiber base material and a mold, and the resin barrier aeration medium is disposed between the suction medium and the end part of the fiber base material. The method further includes: impregnating the fiber base material with a resin by injecting the resin from an injection part, while reducing a pressure in the cavity by suction from a suction part; curing the resin with which the fiber base material is impregnated; and releasing a fiber-reinforced resin in which the fiber base material and the resin are integrated.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: June 22, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Mitsutoshi Maeda, Kazuma Takeno, Hiroshi Tokutomi, Tetsuya Sato, Kazunori Kuga
  • Publication number: 20190176412
    Abstract: A method for producing a fiber-reinforced resin molded article includes disposing a suction medium, a resin barrier aeration medium and a fiber base material in a cavity such that the suction medium is disposed between an end part of the fiber base material and a mold, and the resin barrier aeration medium is disposed between the suction medium and the end part of the fiber base material. The method further includes: impregnating the fiber base material with a resin by injecting the resin from an injection part, while reducing a pressure in the cavity by suction from a suction part; curing the resin with which the fiber base material is impregnated; and releasing a fiber-reinforced resin in which the fiber base material and the resin are integrated.
    Type: Application
    Filed: August 9, 2017
    Publication date: June 13, 2019
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Mitsutoshi Maeda, Kazuma Takeno, Hiroshi Tokutomi, Tetsuya Sato, Kazunori Kuga
  • Publication number: 20190077097
    Abstract: A method for manufacturing a composite material includes placing a netlike sheet material, through which a resin composition permeates, on reinforcing fiber substrates disposed on a forming die. The method includes covering the reinforcing fiber substrates disposed on the forming die and the bag surface-smoothing sheet with a bag film to form a sealed forming space between the bag film and the forming die. The method includes infusing a resin composition into the forming space to impregnate the reinforcing fiber substrates. The method includes curing the resin composition impregnated in the reinforcing fiber substrates. Warp yarns and weft yarns are disposed in a lattice pattern and, after placing the bag surface-smoothing sheet on the reinforcing fiber substrates so that the warp yarns and the weft yarns form acute angles with respect to corners of the reinforcing fiber substrates, the bag surface-smoothing sheet projecting from the reinforcing fiber substrates is bent.
    Type: Application
    Filed: April 5, 2017
    Publication date: March 14, 2019
    Inventors: Kazuma TAKENO, Mitsutoshi MAEDA, Hiroshi TOKUTOMI, Tetsuya SATO
  • Patent number: 6973234
    Abstract: Each of guided beam incident portions of an optical waveguide device includes a straight incidence area where laser beams enter, a curved area which curves the laser beams entering from the straight incidence area in a predetermined direction, and a widening tapered area which makes the laser beams that have passed through the curved area parallel or substantially parallel to a propagation direction of the laser beams by decreasing propagation angles of the laser beams.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: December 6, 2005
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Kazuo Hasegawa, Tadashi Ichikawa, Hiroyuki Matsubara, Mitsutoshi Maeda, Hiroshi Ito
  • Publication number: 20030223685
    Abstract: Each of guided beam incident portions of an optical waveguide device includes a straight incidence area where laser beams enter, a curved area which curves the laser beams entering from the straight incidence area in a predetermined direction, and a widening tapered area which makes the laser beams that have passed through the curved area parallel or substantially parallel to a propagation direction of the laser beams by decreasing propagation angles of the laser beams.
    Type: Application
    Filed: May 28, 2003
    Publication date: December 4, 2003
    Applicant: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Kazuo Hasegawa, Tadashi Ichikawa, Hiroyuki Matsubara, Mitsutoshi Maeda, Hiroshi Ito
  • Publication number: 20020114601
    Abstract: An optical fiber, a mixture solution of the photosetting resins polymerizing in two different polymerization types, and a transparent container are prepared. The photosetting resins are not copolymerized, and have different activation wavelengths of the photopolymerization initiators for hardening. Employing a combination in which the activation wavelength of a photopolymerization initiator for a photosetting resin with higher refractive index after hardening is longer than the activation wavelength of a photopolymerization initiator for a photosetting resin with lower refractive index after hardening, a core portion can be only formed by hardening the photosetting resin with higher refractive index due to a difference between two wavelengths. Thereafter, a clad portion can be formed by hardening two kinds of photosetting resins, where by an optical transmission device can be manufactured.
    Type: Application
    Filed: November 28, 2001
    Publication date: August 22, 2002
    Inventors: Manabu Kagami, Tatsuya Yamashita, Hiroshi Ito, Kazuo Okamoto, Masatoshi Yonemura, Satoru Kato, Mitsutoshi Maeda, Naoya Chujo, Takashi Wada, Yukitoshi Inui, Shigeru Fukumoto, Naoki Yoshimura
  • Patent number: 4839525
    Abstract: A method of and an apparatus for measuring the coordinates of each edge of a tape is disclosed. The method comprises the steps of attaching a tape to a surface of an object, such as a three-dimensional subject, to be measured in such a manner that at least one edge of the tape is placed along a measurement line, such as an edge, on the surface, the tape and the surface differing from each other in reflectance; projecting a deflected spot beam onto the area of the surface of the object including the edges of the tape; and detecting the portion of the area the reflectance of which sharply varies, thereby calculating the two-dimensional coordinates of the thus-detected values. Accordingly, it is possible to accurately measure the three-dimensional configuration along the measurement line.
    Type: Grant
    Filed: September 9, 1987
    Date of Patent: June 13, 1989
    Assignees: Kabushiki Kaisha Tokai Rika Denki Seisakusho, Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Yukio Kano, Kuniyuki Yoshikawa, Hideaki Kishida, Hiroshi Ito, Mitsutoshi Maeda