Back to results
US 10,864,408 B2Granted
Golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorsTakahiro Sajima, Hironori Takihara, Toshiyuki Takubo
Life of this patent
Estimating the term…
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 minute projections 18 are exposed on the surface of the golf ball. 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. The surface of the golf ball has a maximum height Sz of not less than 5 μm and not greater than 200 μm.
Claims7
A golf ball comprising a core and a cover positioned outside the core, wherein
- the cover has a plurality of minute projections on a surface thereof,
- each minute projection has an exposed portion that is exposed on a surface of the golf ball,
- 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, and
- an average value Hay of heights H of the exposed portions is not less than 2 μm and not greater than 50 μm,
- wherein the arithmetic average height Sa is based on a three-dimensional image obtained from a laser microscope scanning of the golf ball surface to generate unevenness data and corresponds to the average height of the surface of the golf ball as measured according to the standards of ISO-25178.
2 more elements
Dependencies are inferred from the claim text.