Back to results
US 2010/0160094 A1Published application
Sports equipment with resonant core bodies and method for production thereof
OwnerRoland Sommerinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerRoland Sommerinventor
Estimating the term…
Provided is a shaped body for production of sports equipment such as tennis, squash, and badminton rackets, golf clubs, hockey and ice hockey sticks and baseball bats. The shaped body includes a core of two tubular resonant bodies, running parallel to and spaced at a distance from each other and surrounded by a common covering. A spacer body with convexly curved opposed ends is arranged between the resonant bodies, whereby the mass of the resonant bodies is greater than that of the spacer body. The vibrations of the two vibrating systems, in the form of the resonance bodies, are overlaid in an advantageous manner, by means of the coupling of the resonance bodies. The invention further relates to a method for the production of the shaped body and the use of the shaped body in sports equipment.
A structural member to manufacture a sports equipment, in particular tennis, squash, badminton racquets, golf clubs, field hockey and ice hockey sticks and baseball bats, having two hollow cylindrical resonating elements arranged in parallel and having outer and inner surfaces that are each continuously convexly curved in a latitudinal cross section thereof, spaced at a distance from one another and enclosed by a common covering with nothing interposed between the common covering and the hollow cylindrical resonating elements, and with a distancing element disposed between the resonating elements, characterized in that the mass of each resonating element is greater than the mass of the distancing element, that the compressive strength of the distancing element is the highest in the direction of an axis that connects the center points of the resonating elements, and wherein the distancing element includes opposed concave ends that are conterminous with each of the respective curved outer surfaces of the resonating elements.
A structural member to manufacture a sports equipment, the structural member comprising two single layer hollow cylindrical resonating elements arranged in parallel and spaced at a distance from one another, a distancing element disposed directly between the resonating elements, and a common covering disposed directly on and internally contacting only the resonating elements and the distancing element, characterized in that the mass of each resonating element is greater than the mass of the distancing element and the compressive strength of the distancing element is the highest in the direction of an axis that connects center points of the resonating elements, each of the hollow cylindrical resonating elements having inside and outside surfaces that are each continuously convexly curved in a latitudinal cross section thereof and the sports equipment being one of a tennis racquet, a squash racquet, a badminton racquet, a golf club, a field hockey stick, an ice hockey stick and a baseball bat.
A sports racquet comprising a handle, a frame, and strings disposed in a plane, the frame peripherally surrounding the strings and including a structural member having two hollow cylindrical resonating elements arranged in parallel, spaced at a distance from one another and having a distancing element disposed therebetween, the distancing element disposed along an axis connecting respective center points of the resonating elements and being generally orthogonal to the plane, each hollow cylindrical resonating element formed of a single layer of material having opposed inner and outer surfaces having the same shape and each of the inner and outer surfaces continuously convexly curved along a latitudinal cross section of the hollow cylindrical resonating element, wherein the resonating elements and distancing element are enclosed by a common covering that conformally covers the resonating elements and distancing element.
Dependencies are inferred from the claim text.