Wood screw with intermediate thread sections tapering to the front

A method of inserting a wood screw into a massive wood base, the method comprising:

• applying a screw tip at a first end of the wood screw on the massive wood base, wherein the screw tip is formed as a point-shaped end;
• applying an insertion force to the wood screw, such that the screw tip penetrates into the massive wood base;
• and
• applying a torque to the wood screw such that a thread between the screw tip and a screw head self-cuttingly cuts a counter-thread in the massive wood base,
• wherein intermediate portions of a shaft located between more than a half of neighboring thread turns taper towards the screw tip, which intermediate portions radially displace wood material when the wood screw axially penetrates into the massive wood base, the intermediate portions forming a saw tooth structure;
• and
• wherein the tapered portions are pivoted with respect to a screw axis such that the respective tapered portion intersects a mass equivalent circular cylinder core in the center between a respective back thread turn and a respective front thread turn.

A method of manufacturing a wood screw, the method comprising:

• forming a shaft portion of the wood screw with a thread which is self-cutting in massive wood;
• forming a screw head connected to the shaft portion directly or indirectly at a back side;
• forming a screw tip connected to the shaft portion directly or indirectly at a front side, for predrilling-freely penetrating into the massive wood base such that the screw tip is formed as a point-shaped end;
• forming intermediate portions with a surface that tapers towards the screw tip between more than half of the neighboring thread turns along the shaft portion, such that the intermediate portions form a saw tooth structure;
• and
• wherein the tapered portions are pivoted with respect to a screw axis such that the respective tapered portion intersects a mass equivalent circular cylinder core in the center between a respective back thread turn and a respective front thread turn.

A method for using a wood screw, the method, comprising:

• selecting a wood screw having a shaft with a thread which is self-cutting in massive wood, a screw head which is connected to the shaft directly or indirectly at a back side, and a screw tip which is connected to the shaft directly or indirectly at a front side,
• wherein the screw tip is formed as a point-shaped end, wherein along the shaft intermediate portions between more than a half of neighboring thread turns taper towards the screw tip, the intermediate portions forming a saw tooth structure;
• arranging the wood screw such that the screw tip is proximal to a surface of a massive wood base;
• applying an insertion force for introducing the screw tip into a massive wood base;
• rotating the screw head;
• and
• wherein the tapered portions are pivoted with respect to a screw axis such that the respective tapered portion intersects a mass equivalent circular cylinder core in the center between a respective back thread turn and a respective front thread turn.