Wurth International Ag

Adolf Würth Gmbh & Co. Kg

Wuerth International Ag

Adolf Wuerth Gmbh & Co. Kg

Swg Schraubenwek Gaisbach Gmbh

Swg Schraubenwerk Gaisbach Gmbh

Andreas Wunderlich

Rainer Eckert

Johannes Starke

Siegfried Humm

Frank Wolpert

Juergen Wanner

Jürgen Wanner

Jurgen Wanner

Eberhard Wied

Jürgen Küenzlen

A wood screw, having a shaft, a screw tip, and thread turns. The thread turns run circumferentially on at least a portion of the shaft, preferably through or into a screw tip. The wood screw includes at least one arc-shaped protrusion between at least two adjoining ones of the thread turns.

Wood screw having a crescent-shaped protrusion between thread turns

A screw has a shaft section which extends axially, a screw thread at the shaft section, which screw thread has thread turns that extend radially starting from the shaft section, a screw tip section which connects to the shaft section, at least one first scraping edge at the screw tip section, and at least one second scraping edge in a region of the shaft section adjacent to the screw tip section. The at least one first scraping edge and the at least one second scraping edge are spaced at a distance from each other and extend in an axial direction over different areas of the screw.

Screw having discontinuous scraping edges

Wood screw for predrilling-freely inserting into a wood base, in particular into a massive wood base, wherein the wood screw comprises a shaft portion with a thread which is self-cutting in wood, a screw head which is connected to the shaft portion directly or indirectly at a back side, and a screw tip which is connected to the shaft portion directly or indirectly at a front side, for predrilling-freely penetrating into the wood base, wherein at the shaft portion between neighboring thread turns, portions are formed which taper towards the screw tip.

Wood screw with intermediate thread sections tapering to the front

Screw for introducing into an underground, comprising a screw shaft and a screw head which is adjoining the screw shaft, in which a drive is formed for rotary driving the screw by a drive element, wherein the drive comprises a hollow wing section at an outer side of the screw with a circular hollow core and hollow wings which are provided along the circumference, wherein the drive comprises a hollow recess section at an inner side of the screw, and wherein the drive at a transition between the hollow wing section and the hollow recess section comprises a chamfer section whose outer surface is angled with respect to an outer surface of the hollow wing section and with respect to an outer surface of the hollow recess section.

Screw and drive element with chamfer

A method for integrally forming a drilling tip on a wire nail, in particular in order to produce a screw with the aid of a pair of pinching jaws, provides for the bulge formed by the displaced material during the integral forming of the drilling tip to be sheared off the drilling tip along the entire length of the cutting edges of the drilling tip produced and to be left connected to the drilling tip only along the longitudinal side edges of the latter by a predetermined breaking point.

Method and pair of pinching jaws for producing a drilling tip

The invention relates to a particle board screw having a conical screw tip with a thread. The thread extends from the screw shaft to the front end of the screw tip. In order to make it easier to screw in, and in order to reduce the splitting effect in wood, a shoulder or rib is disposed in the front region of the screw, which is to say on the end or inside of the tapering part, preferably extending around the entire circumference with no pitch. The rib has a front flank running almost transversely to the longitudinal axis of the screw and a more strongly inclined rear flank. The screw has a reduced screw-in torque.

Particle board screw

Disclosed is a screw for hard wood, comprising a screw tip () with two cutting edges () that extend approximately parallel to each other and perpendicular to the longitudinal axis of the screw. The cutting angle of the cutting edges amounts to about 90&#xb0;. A centering tip () which slightly protrudes from the two cutting edges () is embodied in the extension of the longitudinal axis of the screw. Said centering tip () prevents the screw from deviating to the side at the beginning of the drilling process.

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Kupferzell, Germany

Andreas Wunderlich