Abstract: A surf-type board, such as a snowboard. Several threaded sleeves which are anchored in the body of the surf-type board and each have an inner thread accessible from the top of the body of the surf-type board, and which form an anchoring system for attachment of a binding or similar function element to the body of the surf-type board, and to an anchoring system for a binding or similar function element to be attached to the top of a surf-type board.

Abstract: A ball-game racket, in particular a tennis racket, having a racket head consisting of a tension frame and netting and having a shaft (6) with handle extending away from the racket head, has at least one spring-mass system which is provided on one side of a midplane enclosing the longitudinal axis of the shaft and arranged perpendicular to the plane of the netting and has, in a movement channel extending from the handle into the racket head, at least one mass weight which is movable in the longitudinal direction of the channel against the action of a spring element between a starting position in the handle and an end position in the racket head.

Abstract: A ball-game racket, particularly a tennis racket, including a hollow, outdly closed racket body that forms a racket handle and a racket frame including a racket head, the racket frame being provided with stringing formed of intersecting string lengths on the racket head and defining a stringing plane, at least part of the string lengths having on the inside of the frame, at least in an axial direction perpendicular to the stringing plane, a mobility greater than the corresponding mobility of the outer side of the racket frame.