Head Technology Gmbh

Dystar Textilfarben Gmbh & Co. Deutschland Kg

Head Sport Gmbh

Stefan Mohr

Ralf Schwenger

Harald Rosenkranz

Johan Kotze

Daniel Lau

Manfred Emberger

Klaus Rambach

Jürgen Wilke

Claus Müller

Herfried J Lammer

Norbert Grund

Thomas Bechtold

Wolfgang Schrott

Nathan Elliott

Wolfgang Hiebsch

Gert Rhomberg

Wolfgang Schlor

Rob Cottey

Christos Tsangalis

Reinhard Schneider

Jürgen Dipl-Ing Wilke

The invention relates to a ball game racket frame () including a head portion (), a shaft portion () and a grip portion (). The ball game racket frame () comprises a fiber composite material having fibers embedded in a matrix. At least 5% of the fibers are natural fibers in at least one cross-section () of a portion of the ball game racket frame (). The invention further relates to a ball game racket frame () in which the proportion of natural fibers in at least one cross-section () of the shaft portion () and/or the grip portion (), respectively, is greater than the proportion of natural fibers in at least one cross-section () of the head portion (). The invention further relates to a method for manufacturing such ball game racket frames ().

Ball game racket frame and method for manufacturing a ball game racket

The present invention relates to a method for characterizing a racket head of a ball game racket frame as well as to the representation of a racket head.

Characterization of a ball game racket frame

The present invention relates to a ball game racket frame with a head portion and a handle portion, wherein the ball game racket frame comprises a fiber composite with at least one multi-fiber roving that is at least partially twisted.

Ball game racket frame

The invention relates to a frame for a ball game racket comprising a handle region and a head region with a bridge, wherein a part of the head region and/or the handle region comprise(s) a carbon fiber composite material and wherein the bridge comprises magnesium and is formed as one part.

Ball game racket with magnesium bridge

The present invention relates to a ball game racket, a method for adjusting the length of the handle portion of a ball game racket and a handle shell for the handle portion of a ball game racket.

Handle shell for ball game racket

The invention relates to a bridge for a ball game racket as well as to a frame for a ball game racket comprising a bridge.

Bridge for a ball game racket

The present invention relates to a grommet strip for a racket for ball games, wherein the grommet strip comprises a longitudinal direction and a plurality of grommetscomprising grommet through-holes, wherein each of the grommetsdefines a grommet axis A and each of the grommet through-holesdefines a hole axis B, wherein the grommet axes A and the hole axes B extend substantially parallel to each other and wherein the hole axes B of some grommets are offset with respect to the grommet axes A thereof in the longitudinal direction of the grommet strip.

Grommet strip

The present invention relates to a racket for ball games comprising a frame forming a head portion and a handle portion, wherein the head portion accommodates a string bed comprising strings and defining a string plane, wherein the strings of the string bed are passed through several holes in the head portion, wherein at least three strings are passed through three of said holes in such a way that the longitudinal axis of each of said three holes extends in a first direction and the string passed through the hole extends within the string bed in a second direction, wherein the first and the second direction include an angle having an absolute value between 0.5&#xb0; and 15&#xb0; and wherein the absolute values of the angles of these three strings differ by maximally 3&#xb0;.

Racket for ball games having sound

The present invention relates to an elastic grip sleeve for the grip of a ball game racket, the sleeve having an inner surface and an outer surface, wherein the inner surface is provided at least in parts with an adhesive strip. The present invention moreover relates to a retrofit kit for a ball game racket, comprising a grip sleeve and at least an adhesive strip. Moreover, according to the invention there is provided a method for attaching a grip sleeve to the grip portion of a ball game racket.

Elastic grip sleeve and grip cap for ball game racket

The invention relates to a racket for ball games, in particular a tennis or squash racket, comprising a head region for receiving a stringing as well as at least one joint which is provided in the head region and the joint axis of which is arranged essentially perpendicularly with respect to a stringing plane formed by the stringing.

Racket comprising a joint

A ball game racket according to the present invention comprises a racket head and a racket shaft, wherein the racket head comprises a stringing having transverse strings and longitudinal strings each having a vibration length. The racket head comprises a means which reduces the vibration length of a plurality of strings on both sides of the stringing depending on the deflection of the strings. The means is attached as a separate part to the racket head.

Ball game racket with variable vibration length

The present invention relates to a grip tape for ball game rackets having a conical or trapezoidal base shape in the longitudinal direction or a length and a width, wherein the width varies at least along an essential portion of the length. The present invention also relates to a replacement grip tape including the features of a grip tape of the invention, and a process for producing a grip tape of the invention. Moreover, the present invention also relates to a grip for a ball game racket including a portion facing the head region of the ball game racket and having a first cross-section and a portion facing the end of the ball game racket and having a widening cross-section for holding the grip, as well as the combination of grip and grip tape.

Grip tape and grip for ball game racket

The disclosure relates to a racket for ball games, and in particular, a tennis or squash racket, with a head region for receiving a stringing defining a stringing plane, a grip portion for holding the racket, and a heart region wherein the heart region has two arms and a bridge. The bridge may be pivot-mounted on both arms relative to an axis substantially perpendicular to the stringing plane. The present disclosure further relates to a method for manufacturing a racket including the step of manufacturing a racket frame with a head region, two arms, and a grip portion in a blow molding process. The method may also include manufacturing a bridge for a racket frame in the blow molding process. The method may further include connecting the bridge with the remaining racket frame.

Racket with moveably mounted bridge

A racket for ball games may include a frame which is formed by a frame profile or a hollow profile and has a racket head and a handle portion connected thereto preferably via a heart region. Two indentations that are symmetrical relative to the longitudinal axis of the racket may be provided in the heart region of the frame. A vibrating device may be arranged in each of the two indentations. The vibrating means of the racket may preferably be effective for vibrations having at least two vibration modes or degrees of freedom. Additionally or alternatively, a racket for ball games may include a frame which forms a head region for receiving strings and a handle portion for holding the racket. The frame may include one respective inwardly-facing C-profile in at least two segments of the head region.

Racket for ball games

The present invention relates to a dampening device for ball game rackets. The dampening device of the present invention includes at least one dampening element having a foot or base region, a head region and a neck or connection region arranged between the foot region and the head region. The provision of a neck or connection region leads to an optimum distance between foot or base region and head region and/or an optimum and safe positioning of the head region in the stringing plane at a preferred distance from the heart region of the racket. Preferably, the neck region is tapered or necked relative to the foot or base region and/or the head region at least in the width or thickness direction of the dampening device of the invention.

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Dornbirn, Austria

Stefan Mohr