Patents by Inventor Nobukatsu Yamato

Nobukatsu Yamato 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: 5667857
    Abstract: The present invention provides a molding sheet material having a sandwich structure produced by preparing a fiber reinforced thermoplastic resin layer (A) reinforced with a woven fabric or a knitted web and a fiber reinforced thermoplastic resin layer (B) reinforced with a random mat and using the layer (A) as a core layer and the layer (B) as a skin layer, or using the layer (B) as a core layer and the layer (A) as a skin layer. When this sheet material is molded into a three-dimensional structure, the layer (B) serves as a cushion to prevent the occurrence of a wrinkle or a crease in the layer (A). A toe puff for a safety shoe having a light weight and excellent pressing resistance can be prepared through the molding of this sheet material. In the sheet materials, the core layer or the skin layer consisting of a thermoplastic resin reinforced with a woven fabric or a knitted web of a reinforcing fiber may be prepared from a woven fabric or a knitted web of a reinforcing fiber alone.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: September 16, 1997
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Shoichi Watanabe, Hirokazu Inoguchi, Yoshihiro Kanzaka, Yoshiharu Tanaka, Hideji Ikehara, Ryuji Saiki, Nobukatsu Yamato, Tomohiro Mori, Minoru Senna
  • Patent number: 5560985
    Abstract: The present invention provides a molding sheet material having a sandwich structure produced by preparing a fiber reinforced thermoplastic resin layer (A) reinforced with a woven fabric or a knitted web and a fiber reinforced thermoplastic resin layer (B) reinforced with a random mat and using the layer (A) as a core layer and the layer (B) as a skin layer, or using the layer (B) as a core layer and the layer (A) as a skin layer. When this sheet material is molded into a three-dimensional structure, the layer (B) serves as a cushion to prevent the occurrence of a wrinkle or a crease in the layer (A). A toe puff for a safety shoe having a light weight and excellent pressing resistance can be prepared through the molding of this sheet material. In the sheet materials, the core layer or the skin layer consisting of a fiber reinforced thermoplastic resin reinforced with a woven fabric or a knitted web of a reinforcing fiber may be prepared from a woven fabric or a knitted web of a reinforcing fiber alone.
    Type: Grant
    Filed: September 27, 1993
    Date of Patent: October 1, 1996
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Shoichi Watanabe, Hirokazu Inoguchi, Yoshihiro Kanzaka, Yoshiharu Tanaka, Hideji Ikehara, Ryuji Saiki, Nobukatsu Yamato, Tomohiro Mori, Minoru Senna