Patents Assigned to Kabushiki Kaisha Nitto Tekuno Group
  • Patent number: 4069677
    Abstract: An earth anchor includes a steel tension member, or members, sheath encased and embedded in a hardenable material such as mortar grout poured in a bore hole prepared in the ground. Lubricant is applied to the surfaces of the steel tension members before the members are placed within the interior sheaths. Gripping metal pieces are secured to the end portions of the steel tension members in abutment with a pressure bearing plate or plates, also secured to the end portions of the steel tension members. The gripping metal pieces are designed to be sripped from the steel tension end portion member with a force exceeding the predetermined work load of the steel tension members.
    Type: Grant
    Filed: June 16, 1976
    Date of Patent: January 24, 1978
    Assignee: Kabushiki Kaisha Nitto Tekuno Group
    Inventors: Kunimitsu Yamada, Hitaka Kanematsu