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US 5,456,008 AGranted
Process for hard-coating a ball
AssigneeSarma
InventorJean-Claude Hugon
Life of this patent
Estimating the term…
Abstract
This invention relates to a process for hard-coating a ball, consisting in: hollowing in the outer surface of the ball a depression whose periphery lies at a certain distance from the two polar faces of the ball in order that it is bordered by elevated zones; coating the whole of the spherical outer surface with a layer of hard matter; and machining the layer over a depth such that this layer disappears completely on the elevated zones and remains only in the depression. The invention also relates to a ball employed in this process.
Claims4
Process for hard-coating a ball having two flat polar faces, said process comprising:
- hollowing in the outer surface of the ball intermediate the polar faces a depression which is bound by an elevated surface adjacent each polar face, each of said elevated surfaces extending around the entire periphery of its adjacent polar face;
- coating the depression and the elevated surfaces with a layer of hard matter;
- and
- machining the layer of hard matter such that the layer is removed completely from the elevated surfaces and remains only in the depression.
1 more element
Dependencies are inferred from the claim text.