Tennis racket
AssigneeSumitomo Rubber Industries, Ltd.
InventorsFumiya Suzuki, Yosuke Yamamoto
Life of this patent
Estimating the term…
Abstract
In a tennis racket, longitudinal strings extending in a longitudinal direction and transverse strings extending in a transverse direction intersect each other to form a plurality of meshes. At a center, in the transverse direction, of a head, a ratio of an area St of a tip mesh located closest to a tip in the longitudinal direction relative to an area Sc of a center mesh located at a center in the longitudinal direction is not less than. The center mesh is formed in a rectangular shape having short sides in the longitudinal direction and long sides in the transverse direction. Preferably, from the center mesh to the tip mesh, an area of each mesh is set so as to be not larger than an area of a mesh adjacent thereto at a tip side.
Claims19
A tennis racket in which longitudinal strings extending in a longitudinal direction and transverse strings extending in a transverse direction intersect each other to form a plurality of meshes, wherein
- at a center, in the transverse direction, of a head, a ratio of an area St of a tip mesh located closest to a tip in the longitudinal direction relative to an area Sc of a center mesh located at a center in the longitudinal direction is not less than 1.6, and
- the center mesh is formed in a rectangular shape having short sides in the longitudinal direction and long sides in the transverse direction,
- wherein pitches between the longitudinal strings are constant from one end toward the other end of the tennis racket in the transverse direction.
A tennis racket in which longitudinal strings extending in a longitudinal direction and transverse strings extending in a transverse direction intersect each other to form a plurality of meshes, wherein
- at a center, in the transverse direction, of a head, a ratio of an area St of a tip mesh located closest to a tip in the longitudinal direction relative to an area Sc of a center mesh located at a center in the longitudinal direction is not less than 1.6, and
- the center mesh is formed in a rectangular shape having short sides in the longitudinal direction and long sides in the transverse direction, wherein
- when resilience amounts at positions at which a distance Y from a top of the head is 6 cm, 9 cm, 12 cm, and 15 cm are denoted by Hb6, Hb9, Hb12, and Hb15, respectively,
- among the resilience amounts Hb6, Hb9, Hb12, and Hb15, a minimum resilience amount is not less than 0.98 times of a maximum resilience amount.
A tennis racket in which longitudinal strings extending in a longitudinal direction and transverse strings extending in a transverse direction intersect each other to form a plurality of meshes, wherein
- at a center, in the transverse direction, of a head, a ratio of an area St of a tip mesh located closest to a tip in the longitudinal direction relative to an area Sc of a center mesh located at a center in the longitudinal direction is not less than 1.6, and
- the center mesh is formed in a rectangular shape having short sides in the longitudinal direction and long sides in the transverse direction,
- wherein a number of the longitudinal strings is not less than 16 and not greater than 18, and a number of the transverse strings is not less than 18 and not greater than 20.
Dependencies are inferred from the claim text.