With Separable Means Holding Tool Collapsed Above Ground Only Patents (Class 175/264)
  • Anchoring device and method for settling the device in the ground
    Patent number: 3935912
    Abstract: The present invention relates to an anchoring device which rigidly supports many kinds of standing objects in public works or in the construction industry and provides resistance to pulling loads exerted on the device, and also to a method for settling the device in the bottom of a deep shaft bored into the ground.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: February 3, 1976
    Inventor: Mituo Shibata