A screw nail includes a nail shaft portion extending along one direction, and a head portion whose diameter is enlarged along other direction orthogonal to an extension direction. A sharp tip end portion is formed on one end side of the nail shaft portion, and the head portion is formed at an end portion on the other end side. The nail shaft portion is formed with a screw thread, and the head portion is formed with an engaging portion capable of engaging with a rotary tool. A convex portion protruding along an axis direction of the nail shaft portion is formed on an end surface of the head portion. A concave portion that is concave with respect to the convex portion is formed between the convex portion and the engaging portion. A virtual plane specified by vertexes of the convex portion is a plane orthogonal to the axis direction.

A screw nail includes a nail shaft portion extending along one direction, and a head portion whose diameter is enlarged along other direction orthogonal to an extension direction. A sharp tip end portion is formed on one end side of the nail shaft portion, and the head portion is formed at an end portion on the other end side. The nail shaft portion is formed with a screw thread, and the head portion is formed with an engaging portion capable of engaging with a rotary tool. A convex portion protruding along an axis direction of the nail shaft portion is formed on an end surface of the head portion. A concave portion that is concave with respect to the convex portion is formed between the convex portion and the engaging portion. A virtual plane specified by vertexes of the convex portion is a plane orthogonal to the axis direction.

The present invention relates to attachment mean (1) for connecting plane components in dry construction, in particular for fixing two-dimensional construction material to a metallic substructure, having a shaft (2) on one end region of which a point (3) and on the other end region of which a head (4) are formed, a fine thread (5) being formed on the shaft (2) in order to increase extraction values of the attachment means (1), at least in regions, a number of grooves (6) being provided on the shaft (2) which extend substantially parallel to the central axis (X) of the shaft (2).

The present invention relates to attachment mean (1) for connecting plane components in dry construction, in particular for fixing two-dimensional construction material to a metallic substructure, having a shaft (2) on one end region of which a point (3) and on the other end region of which a head (4) are formed, a fine thread (5) being formed on the shaft (2) in order to increase extraction values of the attachment means (1), at least in regions, a number of grooves (6) being provided on the shaft (2) which extend substantially parallel to the central axis (X) of the shaft (2).

A fastener with increased grip strength is provided. Specifically, the fastener can include a head on a first end, a point on a second end opposite from the first end, and a shank in between the head and the point. A plurality of first deformations can be provided each including a first frustoconical portion and a first transition portion. One or more flutes can further be provided that extends from the point through the plurality of the first deformations forming one or more continuous helices. A plurality of second deformations can also be provided each including a second frustoconical portion and a second transition portion. The second deformations can be structurally similar to the first deformations, but having their orientations flipped 180 degrees. The fastener can also include one or more weld spaces for a collated configuration.

A fastener with increased grip strength is provided. Specifically, the fastener can include a head on a first end, a point on a second end opposite from the first end, and a shank in between the head and the point. A plurality of first deformations can be provided each including a first frustoconical portion and a first transition portion. One or more flutes can further be provided that extends from the point through the plurality of the first deformations forming one or more continuous helices. A plurality of second deformations can also be provided each including a second frustoconical portion and a second transition portion. The second deformations can be structurally similar to the first deformations, but having their orientations flipped 180 degrees. The fastener can also include one or more weld spaces for a collated configuration.

The invention relates to a connection element for interconnecting at least two workpieces, having a shaft; a connection-element head, radially protruding beyond the external side of the shaft, at the one end of the shaft; a drive configuration on the connection-element head and a front shaft end, wherein in a holding portion of the shaft that emanates from the lower side of the connection-element head at least one pair of closed annular protrusions are disposed thereon, of which at least one annular protrusion is not completely disposed in a plane that runs perpendicularly to the longitudinal axis of the shaft; and the spacings between the two annular protrusions of the pair along the circumference are of dissimilar size, or the two annular protrusions of the pair of annular protrusions are disposed so as to be mutually parallel; wherein the front end of the shaft is configured as a tapered hole-forming portion, and wherein a maximum external diameter of the hole-forming portion is between 3% and 10% smaller, in particular 5% smaller, than a maximum external diameter of the annular protrusions.

The invention relates to a connection element for interconnecting at least two workpieces, having a shaft; a connection-element head, radially protruding beyond the external side of the shaft, at the one end of the shaft; a drive configuration on the connection-element head and a front shaft end, wherein in a holding portion of the shaft that emanates from the lower side of the connection-element head at least one pair of closed annular protrusions are disposed thereon, of which at least one annular protrusion is not completely disposed in a plane that runs perpendicularly to the longitudinal axis of the shaft; and the spacings between the two annular protrusions of the pair along the circumference are of dissimilar size, or the two annular protrusions of the pair of annular protrusions are disposed so as to be mutually parallel; wherein the front end of the shaft is configured as a tapered hole-forming portion, and wherein a maximum external diameter of the hole-forming portion is between 3% and 10% smaller, in particular 5% smaller, than a maximum external diameter of the annular protrusions.

The present invention relates to a dosing apparatus for dosing a good, in particular a good to be dried such as a fermentation substrate or dung, comprising a conveyor for conveying a good to be dried in a conveying direction, wherein the good to be dried may be fed onto the conveyor by a feeding system and wherein the conveyor may deliver the good to be dried to a downstream unit such as a drying apparatus, and a control unit designed to control a conveying speed of the conveyor, wherein the conveyor is pivotally arranged about a vertical swivel axis, characterized in that the control unit is arranged and designed to control an oscillating movement, preferably a speed, in particular an angular speed, and/or a frequency of the oscillating movement, of the conveyor about the swivel axis.

The present invention relates to a dosing apparatus for dosing a good, in particular a good to be dried such as a fermentation substrate or dung, comprising a conveyor for conveying a good to be dried in a conveying direction, wherein the good to be dried may be fed onto the conveyor by a feeding system and wherein the conveyor may deliver the good to be dried to a downstream unit such as a drying apparatus, and a control unit designed to control a conveying speed of the conveyor, wherein the conveyor is pivotally arranged about a vertical swivel axis, characterized in that the control unit is arranged and designed to control an oscillating movement, preferably a speed, in particular an angular speed, and/or a frequency of the oscillating movement, of the conveyor about the swivel axis.