LATERAL SIDE PROTECTION OF A PISTON RING WITH A THERMALLY SPRAYED COATING

摘要

A piston ring is disclosed that includes a radially extending upper surface, a radially extending lower surface, a radially innermost surface extending between the upper surface and the lower surface, and a radially outermost surface extending between the upper surface and the lower surface. The lower surface includes a thermally sprayed coating, and both the radially outermost surface and the upper surface lack the coating. Accordingly, the thermally sprayed coating may generally be applied solely to the lower radially extending surface of the ring.