Variable inertia head racket
AssigneeLisco, Inc.
InventorPatrick Stennett
Life of this patent
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Abstract
A tennis racket comprising a head formed as a closed loop at the upper end, a handle for being gripped by a player at the lower end and coupling beams therebetween, the head being formed with varied inertial cross-sectional configurations around its periphery with a nearly circular cross-sectional configuration at the upper edge of the head and the lower edge of the head and with an oval wide-beam cross-sectional configurations at the sides of the head between the 2 and 5 o'clock positions and the 7 and 10 o'clock positions for generating a stiffness that is about 70% of the other sections which have nearly circular cross-sectional configuration and strings in a plane secured in the head.
Claims4
A tennis racket comprising a head formed as a closed loop at the upper end, a handle for being gripped by a player at the lower end and coupling beams therebetween, the head being formed with varied inertial cross-sectional configurations around its periphery with a nearly circular cross-sectional configuration at the upper edge of the head and the lower edge of the head and with oval wide-beam cross-sectional configurations at the sides of the head between the 2 and 5 o'clock positions and the 7 and 10 o'clock positions for generating a stiffness that is about 70% of the stiffness at the upper edge of the head and the lower edge of the head which have nearly circular cross-sectional configurations and strings in a plane secured in the head.
A tennis racket frame comprising a head at the upper end, a handle for being gripped by a player at the lower end and coupling beams therebetween, the head being formed as a closed loop for the support of strings in a plane, the cross-sectional configuration of the head being formed with varied inertial cross-sectional configurations around its periphery with a nearly circular cross-sectional configuration at the upper and lower edges of the head and with oval cross-sectional configurations at the sides of the head for generating a stiffness that is less than the stiffness at the upper and lower edges of the head.
Dependencies are inferred from the claim text.