Title:
SELF-TAPPING SCREW
Document Type and Number:
WIPO Patent Application WO/2018/208149
Kind Code:
A8
Abstract:
Self-tapping screw made of synthetic material having a shank on which a thread is formed, which shank defines a screw center line, - wherein the screw has a proximal end and a distal insertion end, - wherein the shank comprises a first portion and a second portion, - wherein the second portion is situated proximal relative to the first portion, in particular connects to the first portion, - wherein the thread has the same pitch in the first and second portions, - wherein the thread has a complete thread cross-section in the second portion, - wherein in the first portion, in the direction of the thread, the thread is divided into thread segments having an incomplete thread cross-section, - wherein the thread segments have a leading end and a trailing end, - wherein relative to the screw center line, the leading end of the one thread segment extends further in radial direction than the leading end of the thread segment preceding it and forms a cutting edge, characterized in that - in at least the majority of the thread segments the thread top in question, for at least substantially its full length, starting with the leading end, when considered in thread direction, is situated at a constant radial distance from the screw center line.
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Inventors:
VELDHOEN GEORGE GUSTAAF (NL)
Application Number:
PCT/NL2018/050297
Publication Date:
April 25, 2019
Filing Date:
May 07, 2018
Export Citation:
Assignee:
PARTNERSHIP TWELLO B V (NL)
International Classes:
F16B33/00
Attorney, Agent or Firm:
FERGUSON, Alexander (NL)
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