PISTON RING Russian patent published in 2016 - IPC F16J9/12 

FIELD: machine building.

SUBSTANCE: invention relates to the piston ring. The piston ring, in particular compression piston ring, is made with main part, that has radial external work surface, radial internal peripheral surface, top and bottom side surface, and lock. The ring work surface has at least formed along circle division to chambers, that receives the wear-resistance coating, in particular PVD coating, starting from edges of the lock wall, if looking towards perimeter of the main part. Wherein from outside the coating on the main part a wall projection is made, it goes with set height along definite length of the perimeter at both sides of the lock.

EFFECT: invention improves reliability of the device.

5 cl, 5 dwg