Piston ring
AssigneeNippon Piston Ring Co., Ltd.
InventorTsutomu Takao
Life of this patent
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Abstract
A piston ring whose piston ring sliding surface is provided with a channel having chrome plating layer, with grooves continuously or discontinuously provided on the borders of the chrome layer and land portions of the piston ring sliding surface so that the ridgelines of the chrome layer form an obtuse angle at each side thereof.
Claims3
In a piston ring whose piston ring sliding surface is provided with a channel having a chrome plating layer therein, the improvement comprising, the piston ring with said chrome layer having an upper groove and lower groove at the borders of said chrome layer and, the land portions of said piston ring sliding surface and the ridgelines of said chrome layer forming an obtuse angle at each side thereof.
Dependencies are inferred from the claim text.