Patents by Inventor Takahide Saiki

Takahide Saiki 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).

  • Pregrouted PC steel material and method for hardening pregrout layer thereof
    Patent number: 10081943
    Abstract: Provided is a pregrouted PC steel material comprising a PC steel stranded wire composed of a plurality of steel wires, a pregrout layer disposed on the outer periphery of the PC steel stranded wire so as to accommodate the PC steel stranded wire, a sheath covering the outer periphery of the pregrout layer, and a capsule including a pregrout-hardening agent and a film with which the agent is covered, the capsule being interposed among the steel wires constituting the PC steel stranded wire. The capsule has a strength such that the capsule is not broken before tensioning the PC steel stranded wire but is broken by a tensile force during the tensioning. Also provided is a method for hardening the pregrout layer.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: September 25, 2018
    Assignees: Sumitomo (SEI) Steel Wire Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Takahide Saiki, Masato Yamada, Yoshihiko Touda, Takashi Ichiki, Kiminori Matsushita, Katsuhito Oshima, Jun Sugawara, Shingo Nakajima, Shuhei Maeda
  • PREGROUTED PC STEEL MATERIAL AND METHOD FOR HARDENING PREGROUT LAYER THEREOF
    Publication number: 20150159377
    Abstract: Provided is a pregrouted PC steel material comprising a PC steel stranded wire composed of a plurality of steel wires, a pregrout layer disposed on the outer periphery of the PC steel stranded wire so as to accommodate the PC steel stranded wire, a sheath covering the outer periphery of the pregrout layer, and a capsule including a pregrout-hardening agent and a film with which the agent is covered, the capsule being interposed among the steel wires constituting the PC steel stranded wire. The capsule has a strength such that the capsule is not broken before tensioning the PC steel stranded wire but is broken by a tensile force during the tensioning. Also provided is a method for hardening the pregrout layer.
    Type: Application
    Filed: July 5, 2013
    Publication date: June 11, 2015
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takahide Saiki, Masato Yamada, Yoshihiko Touda, Takashi Ichiki, Kiminori Matsushita, Katsuhito Oshima, Jun Sugawara, Shingo Nakajima, Shuhei Maeda