Patent ID: 8448929
Filing Date: 2013-05-28
Classification: B23B,B25B,F16B,Y10T

Abstract:
1. A riveting screw tack ( 50 ) to be introduced into the respective coaxial openings ( 22 , 22 ′) of at least two elements ( 20 , 20 ′) to be assembled and in the guide slots ( 12 ) of a template-forming boring grid ( 10 ), coaxial with the openings ( 22 , 22 ′) of the two elements ( 20 , 20 ′), the tack comprising: a hollow cylindrical body ( a central rod ( a nut ( two axial half-clips ( a central spacer ( the rod/half-clip set being axially mobile within the hollow body ( at least in the rest position of the tack ( the hollow body comprising a nearly-spherical ring-shaped centering bearing ( said centering bearing being held by an external cylindrical surface ( wherein the tack also has a cap (