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1. KR1020080049713 - OIL-CONTROL RING FOR AN INTERNAL COMBUSTION ENGINE

Office Republic of Korea
Application Number 1020087003985
Application Date 19.02.2008
Publication Number 1020080049713
Publication Date 04.06.2008
Publication Kind A
IPC
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
J
PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS
9
Piston-rings, seats therefor; Ring sealings of similar construction in general
06
using separate springs expanding the rings; Springs therefor
F16J 9/06
CPC
F16J 9/068
F16J 9/145
F16J 9/203
Applicants MAHLE INTERNATIONAL GMBH
MAHLE METAL LEVE S.A.
Inventors FERRARESE ANDRE
UEHARA SAMANTHA
Priority Data 2005 200502980 20.07.2005 BR
Title
(EN) OIL-CONTROL RING FOR AN INTERNAL COMBUSTION ENGINE
Abstract
(EN)
An oil-control ring for an internal combustion engine, to be mounted between the sidewalls of a respective groove (10) of a piston (P) and comprising two ring segments (20) and an annular expander (30) disposed between the two ring segments (20) and presenting a support body (31) defining a seating plane for each ring segment (20) , said ring further comprising: at least one expander portion (40) axially projecting from the support body (31) of the expander (30) , beyond at least one of the seating planes of a ring segment (20); and at least one superficial irregularity (50) provided in at least one of the ring segments (20) and which is dimensioned to be contained in the thickness of the respective ring segment (20) and to interfere with at least one expander portion (40), in order to rotatively lock said ring segment (20) in relation to the expander (30). ┬ęKIPO&WIPO 2008