Golf ball
AssigneeBridgestone Corporation
InventorsShinichi Kakiuchi, Junji Umezawa
Life of this patent
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Abstract
In a wound golf ball comprising a wound core having thread rubber wound on a center to form a thread rubber layer thereon and a cover around the wound core, the center has an optimum combination of a diameter A of 26-32 mm with a specific gravity D, the thread rubber layer is formed of inorganic filler-loaded thread rubber and has a specific gravity in the range of 0.93-1.05, and the cover is formed of an inorganic filler-loaded resin and has a specific gravity in the range of 1-1.4. The ball is improved in flying distance.
Claims7
A wound golf ball comprising a wound core having thread rubber wound on a center to form a thread rubber layer thereon and a cover around the wound core, wherein
- said center is a liquid center having a diameter A in the range of 26 to 32 mm and a specific gravity D which satisfy the relationship:
- 1.20.ltoreq.D.ltoreq.-0.9446.times.A+0.0215.times.A.sup.2 -0.00014.times.A.sup.3 +14.12,
- where the specific gravity D is in the range of 1.20 to 1.50
- said thread rubber layer is formed of thread rubber loaded with an inorganic filler such that the thread rubber layer has a specific gravity of 0.95 to 1.05, and
- said cover is formed of a resin loaded with an inorganic filler such that the cover has a specific gravity of 1.1 to 1.4.
Dependencies are inferred from the claim text.