Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsAkira Kimura, Hirotaka Shinohara
Life of this patent
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Abstract
A golf ball composed of a core and a cover has a spin rate and a launch angle on approach shots at a head speed (HS) of 20 m/s or 10 m/s that satisfy formulas (1) and (2) below: Spin W/Spin D≥0.70 (1) Ang W/Ang D<1.20 (2). Here, Spin D is the spin rate (rpm) under dry conditions, Spin W is the spin rate (rpm) under wet conditions, Ang W is the launch angle (°) under wet conditions and Ang D is the launch angle (°) under dry conditions. The golf ball suppresses a decrease in the spin rate on approach shots in rainy weather and thus has an improved controllability, making it especially useful to professional golfers and skilled amateurs who desire a high spin performance around the green.
Claims10
A golf ball comprising a core and a cover, wherein the ball has a spin rate and a launch angle on approach shots at a head speed (HS) of 20 m/s that satisfy formulas (1) and (2) below:
- Spin W/Spin D≥0.70 (1)
- Ang W/Ang D<1.20 (2),
- where Spin D is the spin rate (rpm) under dry conditions, Spin W is the spin rate (rpm) under wet conditions, Ang W is the launch angle (°) under wet conditions and Ang D is the launch angle (°) under dry conditions, and wherein the cover has an outermost layer on which a coating layer is formed, which coating layer is formed of a coating composition consisting of a urethane coating containing both a base resin comprising a polyester polyol, an acrylic additive and a solvent, and a curing agent comprising a polyisocyanate.
A golf ball comprising a core and a cover, wherein the ball has a spin rate and a launch angle on approach shots at a head speed (HS) of 10 m/s that satisfy formulas (1) and (2) below:
- Spin W/Spin D≥0.70 (1)
- Ang W/Ang D<1.20 (2),
- where Spin D is the spin rate (rpm) under dry conditions, Spin W is the spin rate (rpm) under wet conditions, Ang W is the launch angle (°) under wet conditions and Ang D is the launch angle (°) under dry conditions, and wherein the cover has an outermost layer on which a coating layer is formed, which coating layer is formed of a coating composition consisting of a urethane coating containing both a base resin comprising a polyester polyol, an acrylic additive and a solvent, and a curing agent comprising a polyisocyanate.
Dependencies are inferred from the claim text.