Abstract: The invention relates to a safety binding (1) for a snowboard, particularly a safety binding to be attached in pairs to a snowboard. The invention solves the problem of reducing force peaks on the lower extremities of the athlete, which, for example, in the event of a fall exceed a force value which can be set, and in this event also enabling a three-dimensional rotation of the lower extremities. This is achieved in that a lower binding part (2), which can be fixed to the snowboard, and an upper binding part (3), which can be fixed to the shoe, are disposed on mutually facing support surfaces in a sliding manner, wherein the support surfaces are designed as the surface elements of two spherical caps, the common center of curvature of which is located above the lower binding part.

Abstract: An apparatus for producing an essentially wedge-shaped wood flake comprises a chipping tool rotating about a first, horizontal axis for chipping the flake out of the wood such that the flake has a first, concave surface and a second, convex surface. The flake is delimited between the surfaces. A circular saw blade is provided rotating about a second, vertical axis for removing wood in an area in which the surfaces intersect in an imaginary tip, prior to the chipping out.