Golf ball
AssigneeBridgestone Tire Company Limited
InventorHideo Watanabe
Life of this patent
Estimating the term…
Abstract
A golf ball satisfies the following conditions (1) to (6): (1) the number of dimples is 360 to 492; (2) total volume enclosed by the dimples as expressed as a percentage of the volume of the golf ball, VR, is 0.715% to 0.825%; (3) the total surface area of the dimples as expressed as a percentage of the surface area of the golf ball, SR, is not less than 70%; (4) the cover has a Shore D hardness of 53 to 63; (5) the difference obtained through subtraction of JIS C hardness of the surface portion of the core from JIS C hardness of the cover is 0 to 20; and (6) initial velocity is in excess of 77.7 m/s (255 ft/s).
Claims10
A golf ball comprising a core and a cover, said golf ball satisfying the following conditions (1) to (6):
- (1) the number of dimples is 360 to 492;
- (2) total volume enclosed by the dimples as expressed as a percentage of the volume of said golf ball, VR, is 0.715% to 0.825%;
- (3) total surface area of the dimples as expressed as a percentage of the surface area of said golf ball, SR, is not less than 70%;
- (4) said cover has a Shore D hardness of 53 to 63;
- (5) a difference obtained through subtraction of JIS C hardness of a surface portion of said core from JIS C hardness of said cover is 0 to 20;
- and
- (6) initial velocity is in excess of 77.7 m/s (255 ft/s).
Dependencies are inferred from the claim text.