Abstract: The invention relates to a method and to a connector set for connecting beams from wood material, in particular solid wood, glued laminated wood, laminated veneer wood, or plywood board, in particular for connections that are under a compressive as well as a tensile load, wherein a connector has at least one plate-shaped portion for insertion into prefabricated slots in the beam or the beams, wherein at least the plate-shaped portion of the connector is composed of synthetic resin densified wood, wherein the synthetic resin densified wood is composed of a plurality of hardwood layers disposed on top of one another and synthetic resin, and wherein wood screws for fixing the connector are provided.

Abstract: A drilling screw contains on its front end facing away from the screw head a drill bit having two drilling cutters. At an axial distance from the drilling cutters the screw shank has a constriction, within which the diameter of the screw shank is smaller than the diameter of the hole produced by the drill bit. The constriction is configured such that it has a shoulder running almost transversely to the longitudinal axis and facing the screw head and from which the diameter gradually approaches again the core diameter of the shank. Within this constriction begins the thread, wherein the thread edge initially has a distance from the longitudinal axis of the screw which corresponds roughly to the radius of the hole. The thread edge then runs along a spiral up to the final outer diameter of the thread on the shank.

Abstract: A design for a rotary drive both for a tool and for a workpiece to be rotationally driven is proposed. This rotary drive design contains a cylindrical basic shape which deviates from a circular cylindrical shape. The contour or the cross section through this basic shape has a plurality of rounded projections and rounded recesses arranged between said projections. The projections tangentially touch a circle having a maximum radius, while the recesses, for their part, tangentially touch a circle having a minimum radius. Deviating from this cylindrical basic shape, in the regions between the projections are configured conical surfaces, which are not instrumental in the transmission of torques, but take care of centering and alignment between the tool and the workpiece.

Abstract: The invention concerns a screw, in particular a self-tapping screw, with a screw thread which reaches to the front end of the screw formed as a drilling tip. In the front area, starting with a distance from the front end of the screw, there is an opposite thread showing the same pitch as the screw thread, however, its thread height is lower than the thread height of the screw thread. This second, opposite single-thread, double-thread or triple-thread/multi-thread only reaches over the tapered drilling tip and leaves the shank of the screw free. It forms a cutting edge with its thread edge which is used to cut fibers in order to reduce wedge effect during screwing in the screw. The screw is particularly suitable for wood or wood-like materials in the edge areas of structural elements.

Abstract: A screw, in particular a self-tapping screw, has a screw thread which covers up to the front end of the screw formed as a drilling tip or cutting tip. In the front area, starting with a distance from the front end of the screw, there is an opposite thread showing the same pitch as the screw thread, however, its thread height is lower than the thread height of the screw thread. This second, opposite single-thread, double-thread or triple-thread/multi-thread forms a cutting edge with its thread edge which is used to cut fibers in order to reduce wedge effect during screwing in the screw. The screw is particularly suitable for wood or wood-like materials in the edge areas of structural elements.

Abstract: A screw, in particular a self-tapping screw, has a screw thread which covers up to the front end of the screw formed as a drilling tip or cutting tip. In the front area, starting with a distance from the front end of the screw, there is an opposite thread showing the same pitch as the screw thread, however, its thread height is lower than the thread height of the screw thread. This second, opposite single-thread, double-thread or triple-thread/multi-thread forms a cutting edge with its thread edge which is used to cut fibers in order to reduce wedge effect during screwing in the screw. The screw is particularly suitable for wood or wood-like materials in the edge areas of structural elements.

Abstract: In order to ergonomically optimize the hand side of combination pliers, whose gripping arms in each case form a mouth jaw on their ends and are in operative connection by means of a joint in such a way that in the case of different activities with the pliers the adaptation of the gripping arms to the anatomy and anthropometry of the human hand is retained, it is proposed that the gripping arms face one another elliptically in the plane thereof and that in the vicinity of the coupling surface to the hand the gripping arms have an elliptical cross-section.

Abstract: Prior universal pliers with two gripping arms (11, 15) and an adjustable jaw have the disadvantage that during adjustment one must change hands while using the pliers which is unfavourable as regards the economic requirements. This disadvantage is obviated by the present invention in that both gripping arms (11, 15) are non-displaceably articulated on one another and one of the two jaws (19) is displaceably mounted with respect to its associated gripping arm (15) at right angles to the jaw opening.