Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsKatsunori Sato, Atsuki Kasashima
Life of this patent
Estimating the term…
Abstract
In a golf ball possessing a spherical surface having a first radius from a ball center, the spherical surface includes a plurality of small spherical regions having a second radius from the center which is smaller than the first radius. The golf ball is improved in flight performance owing to the reduced air resistance.
Claims13
A golf ball possessing a spherical surface having a first radius R from a ball center, wherein the spherical surface includes a plurality of small spherical regions having a second radius r from the center which is smaller than the first radius and a plurality of depressions are formed in each said small spherical regions and a plurality of dimples are formed on said spherical surface outside said small spherical regions,
- wherein said depressions in the small spherical regions have a depth of 0.04 to 0.19 mm and said dimples on the spherical surface have a depth of 0.08 to 0.2 mm.
A golf ball possessing a spherical surface having a first radius R from a ball center, wherein the spherical surface includes a plurality of small spherical regions having a second radius r from the center which is smaller than the first radius and a plurality of depressions are formed in each said small spherical regions and a plurality of dimples are formed on said spherical surface outside said small spherical regions,
- wherein the difference between said first radius R and said second radius r is from 0.02 to 0.15 mm.
Dependencies are inferred from the claim text.