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US 9,085,056 B2Granted
Method for producing a piston ring
AssigneeFederal-Mogul Burscheid GmbH
InventorsPeter-Klaus Esser, Juergen Gillen
Life of this patent
Estimating the term…
Abstract
A piston ring is produced by providing a metallic main body, at least including a radially outer running surface, a radially inner circumferential surface and upper and lower flank surfaces interposed therebetween, with a defined taper in the region of an approximately cylindrical running surface, providing at least the running surface with at least one wear-resistant layer, and removing the at least one wear layer in the region of the entire circumference of the ring that forms a scraping edge forming a land having a predefinable width.
Claims7
A method for producing a piston ring, comprising
- providing a metallic body having an axis of symmetry including a radially outer circumferential running surface, a radially inner circumferential surface and upper and lower flank surfaces interposed therebetween, with a taper in the region of the running surface,
- providing at least the running surface with at least one wear-resistant layer comprising a PVD topcoat, and
- at least partially removing a region of the at least one wear-resistant layer to form a circumferential scraping edge with an abutting circumferential land of predetermined width which is parallel to the axis of the metallic main body, at least the PVD topcoat having been removed from both the scraping edge and the land, and the land comprising base material of the running surface.
Dependencies are inferred from the claim text.