Patent ID: 11906052
Assignee: TENNECO GMBH
Field: Surface technology, coating (Chemistry)
Classification: CPC C  F | IPC C  F

Claim 6:
7. A method of manufacturing a piston assembly comprising the steps of:
providing a piston body including at least one ring groove extending circumferentially around a center axis,
providing a ring body extending circumferentially around the center axis between opposite end surfaces, the end surfaces presenting a gap therebetween, the ring body having an outer surface facing away from the center axis, the outer surface having end sections adjacent the end surface and a middle section intermediate the end sections,
selectively texturing the end sections so that the end sections of the outer surface are rougher than the middle section,
applying a coating to the rough end sections of the outer surface, the coating including chromium nitride (CrN) or diamond-like carbon (DLC), and
disposing the coated piston ring in one of the at least one ring groove of the piston body.