Abstract: A ski base coating including an embossed push-off aid which consists of a plurality of steps having steep gradient push-off flanks (1', 1", 3) in push-off direction and flat angle ramps in gliding direction. The upper side of the steps is formed of a continuous honeycomb arrangement of equilateral or biaxially symmetric hexagonal fields (2', 2"). For improved push-off effect the fields (2', 2") are so arranged that one of the hexagon sides (1', 1") each extends transversely of the push-off direction, that this hexagon side (1', 1") is designed as push-off edge, and that the hexagon faces form the flat angle step ramps. (FIG.

Abstract: In a process of forming a profiled tread surface on a ski, a cutting tool is moved in steps of defined length in the longitudinal direction of the tread surface to be profiled and in steps of defined length transversely to said longitudinal direction. The cutting tool thus moved is used to form said tread surface with individual recesses, which partly overlap and are defined by sawtooth-shaped step ramps extending in said longitudinal direction. Adjacent transverse rows of said recesses overlap preferably by one-half of the length of each of said transverse steps.

Abstract: A ski, particularly an Alpine ski, wherein the steering of the ski while edging, particularly its ability to execute carved turns, and its edge grip, are improved in that the lateral boundary lines of its bottom edges are so designed that the width of the ski has a relative maximum adjacent to the midpoint of the ski and a relative minimum in the forebody and in the afterbody of the ski. To facilitate the use of the design according to the invention in skis differing in length, it is proposed to superpose a concave base curve and a convex curve portion at the center of the ski. In order to facilitate the use of numerically controlled machines for manufacture, a complete mathematical expression for an embodiment of the invention is stated.

Abstract: In a process of forming a profiled tread surface on a ski, a cutting tool is moved in steps of defined length in the longitudinal direction of the tread surface to be profiled and in steps of defined length transversely to said longitudinal direction. The cutting tool thus moved is used to form said tread surface with individual recesses, which partly overlap and are defined by sawtooth-shaped step ramps extending in said longitudinal direction. Adjacent transverse rows of said recesses overlap preferably by one-half of the length of each of said transverse steps.

Abstract: In a process of forming a profiled tread surface on a ski, a cutting tool is moved in steps of defined length in the longitudinal direction of the tread surface to be profiled and in steps of defined length transversely to said longitudinal direction. The cutting tool thus moved is used to form said tread surface with individual recesses, which partly overlap and are defined by sawtooth-shaped step ramps extending in said longitudinal direction. Adjacent transverse rows of said recesses overlap preferably by one-half of the length of each of said transverse steps.

Abstract: This invention relates to means for suppressing vibration in implements which serve to strike the ball and comprise a striking surface, a hoop which encloses the striking surface, and a handle. The invention relates particularly to tennis rackets and aims at suppressing the high-frequency vibration which is excited by the impact of the ball.In these striking implements, at least two longitudinal or transverse strings or at least one longitudinal string and at least one transverse string are mechanically coupled to each other by a vibration absorber.

Abstract: A cross-country ski binding comprises a toe iron which has two side portions, which extend substantially at right angles to the tread and engage at least one portion which projects from the sole of the skiing boot in front of its toe portion. A clamping member serving to retain the projecting portion is pivoted at least at one end to one side portion. In position for use, the clamping member extends transversely to the longitudinal direction of the ski. The clamping member is pivotally movable in a plane which is transverse to the longitudinal direction of the ski. At its other end, the clamping member is adapted to be releasably locked to the other side portion of the toe iron. In a top plan view, the toe iron has a constriction which is disposed in front of the tip of the foot and which is preferably narrower than the foot. The portion which projects from the sole has a recess which registers with the constriction.

Abstract: A ski comprising an elongated body having a leading end portion which terminates in an upwardly curved scoop. The scoop has a rounded end, which is tapered in width and has a length of up to 90 mm, and a succeeding portion which has parallel side faces.

Abstract: The racket comprises a closed frame, a stringing which is stretched in this frame and forms a striking surface, and a handle for holding the racket. The handle merges at one end into the frame and forms an integral body therewith. Said body comprises an elongated core of an initially expansible material, and mainly longitudinally extending reinforcing fibers surrounding said core. The body is stiffened by structural straps at the outer surfaces of the handle and frame, which outer surfaces extend substantially at right angles to the striking surface, and on the inner surfaces of the frame, which inner surfaces extend substantially at right angles to the striking surface. The elongated core extends from the free end of the handle and through the latter into the frame and extends entirely around the frame.