Patent ID: 9574663
Date: 2017-02-21
CPC Classifications: F16J

Claim:
1. A single-piece oil control ring for a piston, comprising: a body configured to be mounted on a piston groove of the piston and including at least one upper portion and at least one lower portion each having a free end facing towards a cylinder wall of an internal combustion engine; wherein the free end of at least one of the upper portion and the lower portion respectively defines a first surface extending substantially perpendicular to the body and a receding second surface extending from the first surface substantially at an incline, the first surface protruding towards the cylinder wall in relation to the second surface; wherein the first surface has a first area of contact with the cylinder wall, and wherein at least 95% of the first area contacts the cylinder wall; and wherein the second surface defines an acute angle in relation to the first surface, the acute angle being greater than or equal to 30 degrees.