US 9,810,323 B2
Piston ring
Paulo Jose Da Rocha Mordente, Jundiai (BR); Paulo R. Vieira De Morais, São Bernardo do Campo (BR); and Jose V. Lima Sarabanda, São Paulo (BR)
Assigned to Mahle International GmbH, (DE); and Mahle Metal Leve S/A, (BR)
Appl. No. 14/891,275
Filed by Mahle International GmbH, Stuttgart (DE); and Mahle Metal Leve S/A, Jundiai (BR)
PCT Filed May 15, 2014, PCT No. PCT/BR2014/000156
§ 371(c)(1), (2) Date Nov. 13, 2015,
PCT Pub. No. WO2014/183180, PCT Pub. Date Nov. 20, 2014.
Claims priority of application No. 10 20130121339 (BR), filed on May 15, 2013.
Prior Publication US 2016/0084380 A1, Mar. 24, 2016
Int. Cl. F16J 9/20 (2006.01); F16J 9/26 (2006.01); F16J 9/14 (2006.01); C23C 14/06 (2006.01)
CPC F16J 9/26 (2013.01) [C23C 14/0641 (2013.01); F16J 9/14 (2013.01); F16J 9/203 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A piston ring, comprising:
a metallic base, an outer slide layer, and an intermediate layer disposed between the base and the outer slide layer;
wherein the base extends between at least two end regions, each of the at least two end regions having a chamfer extending radially inward from an outer radial face of the respective end region;
wherein the outer slide layer and the intermediate layer are disposed exclusively on the chamfer of each end region of the base;
wherein a radial thickness of the intermediate layer increases towards the outer radial faces such that a radial thickness in the at least two end regions and a radial thickness of the metallic base between the at least two end regions are the same.