Patents by Inventor Takeshi Shiki

Takeshi Shiki 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).

  • Method of preparing mortar or concrete
    Patent number: 4715719
    Abstract: A method and apparatus of measuring water percentages of a fine aggregate comprising the steps of prewetting the fine aggregate, containing the prewetted fine aggregate in an air-tightly closed container, applying a centrifugal force to said container over a predetermined period to remove a portion of a quantity of water deposited on the fine aggregate, and measuring the water content remaining in or on the fine aggregate after being subjected to the centrifugal force, and thus determining a percentage of water adhered to the fine aggregate and a percentage of water of the fine aggregate in which interstice thereof is saturated with water while a surface thereof is dry.
    Type: Grant
    Filed: July 7, 1986
    Date of Patent: December 29, 1987
    Assignee: Yasuro Ito and Taisei Corporation
    Inventors: Yasuro Ito, Yoshiro Higuchi, Takeshi Shiki, Yukikazu Tsuji, Masanori Tsuji, Mitsutaka Hayakawa
  • Method of preparing mortar or concrete
    Patent number: 4686852
    Abstract: A method and apparatus of measuring water percentages of a fine aggregate comprising the steps of prewetting the fine aggregate, containing the prewetted fine aggregate in an air-tightly closed container, applying a centrifugal force to said container over a predetermined period to remove a portion of a quantity of water deposited on the fine aggregate, and measuring the water content remaining in or on the fine aggregate after being subjected to the centrifugal force, and thus determining a percentage of water adhered to the fine aggregate and a percentage of water of the fine aggregate in which interstice thereof is saturated with water while a surface thereof is dry.
    Type: Grant
    Filed: October 16, 1985
    Date of Patent: August 18, 1987
    Assignees: Yasuro Ito, Taisei Corporation
    Inventors: Yasuro Ito, Yoshiro Higuchi, Takeshi Shiki, Yukikazu Tsuji, Masanori Tsuji, Mitsutaka Hayakawa