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1. (WO2017157490) MULTIPLE-PIECE OIL STRIPPING PISTON RING WITH REDUCED FRICTION

Pub. No.:    WO/2017/157490    International Application No.:    PCT/EP2016/078954
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Tue Nov 29 00:59:59 CET 2016
IPC: F16J 9/06
Applicants: FEDERAL-MOGUL BURSCHEID GMBH
Inventors: MACHLINER, Stephan
RUCH, Fabian
Title: MULTIPLE-PIECE OIL STRIPPING PISTON RING WITH REDUCED FRICTION
Abstract:
The present invention relates to a three-piece oil stripping piston ring (2) having an upper disc-shaped stripping ring (4), a lower disc-shaped stabilizing ring (6), and a circular expander (8) which has projections (10) which protrude in the axial direction on an inner side, wherein the circular expander (8) is arranged between the upper stripping ring (4) and the lower stabilizing ring (6), wherein the projections (10) bear in each case on the inside against an inner side (14) of the stripping ring (4) or an inner side (16) of the stabilizing ring (6), and wherein an outer radius (18) of the stripping ring (4) is greater than an outer radius (20) of the lower stabilizing ring (6), with the result that there is a radius difference δ between the stripping ring (4) and the stabilizing ring (6).