Golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorsTakahiro Sajima, Hironori Takihara, Toshiyuki Takubo
Life of this patent
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Abstract
A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 μm and not greater than 30 μm. An average value Hav of heights H of the minute projections 18 is not less than 0.5 μm and not greater than 50 μm. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 μm and not greater than 50 μm.
Claims4
A golf ball comprising a main body and a paint layer positioned outside the main body, wherein
- the golf ball has, on a surface thereof, a plurality of minute projections,
- an average value Dav of diameters D of the minute projections is not less than 5 μm and not greater than 40 μm, and
- an average value Pav of pitches P each between a minute projection and another minute projection adjacent to this minute projection is not less than 20 μm and not greater than 95 μm.
Dependencies are inferred from the claim text.