Patent ID: 6321624
Filing Date: 2001-11-27
Classification: F16B,H01R

Abstract:
A screw clamping apparatus comprising: a shank for use to exert a clamping force on an object selected from a range of objects of known size in an article, said shank including an outer wall and a drive formation for the location of drive means therewith, a threaded portion along at least a part of the outer wall and a series of weakened sections along the threaded portion of the shank, said drive formation being in the form of an axial recess extending into the threaded portion of the shank, said drive means being of a length to extend into the axial recess to lie in said recess in the threaded portion, an end of the drive means and the threaded portion defining a plane of shear of the shank, the weakened sections being spaced with respect to the range of objects such that when a predetermined turning torque is reached to exert a clamping force on the selected object in the article, one of the weakened sections lies substantially in an entry plane of the article to shear substantially in said entry plane.