Patent ID: 6702534
Filing Date: 2004-03-09
Classification: E05D,E05Y,F16B

Abstract:
A spreader dowel, comprising:a sleeve having a cylindrical configuration continuously from end-to-end and including an area formed with an internal first thread portion for engagement by a screw having a head-distal end and a head-proximal end and provided with a continuous thread from the head-proximal end to the head-distal end, said sleeve having opposite ends and including first longitudinal slots on one of the ends for defining an expansion zone and second longitude slots extending inwardly from an end face on the other end, said sleeve having in a region of the second longitude slots toward the end face a zone which is formed with an internal second thread with a thread diameter which is smaller than a thread diameter of the screw while having a same pitch as the thread diameter of the screw, the internal second thread portion being cylindrical; and a spreader piece having a conical portion connected to the screw and widening the expansion zone, when the screw is inserted.