Having A Toothed Surface Patents (Class 411/293)
  • Device for positively locking a screw in a tapped hole
    Patent number: 4252167
    Abstract: The device comprises in combination a screwthreaded block and a screw which are hollow and have screwthreads of opposite direction. These screwthreads cooperate with screwthreads of respectively corresponding direction formed in the inner wall of the tapped hole. There are provided means for stopping the block, and means for preventing rotation between the block and the screw.
    Type: Grant
    Filed: November 29, 1978
    Date of Patent: February 24, 1981
    Assignee: Shur-Lok International S.A.
    Inventor: Alexis Dessouroux