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1. EP1904767 - OIL-CONTROL RING FOR AN INTERNAL COMBUSTION ENGINE

Office European Patent Office
Application Number 06779945
Application Date 14.07.2006
Publication Number 1904767
Publication Date 02.04.2008
Publication Kind B1
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
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
12
Details
20
Rings with special cross-section; Oil-scraping rings
F16J 9/06
F16J 9/20
CPC
F16J 9/068
F16J 9/145
F16J 9/203
Applicants MAHLE INT GMBH
MAHLE METAL LEVE SA
Inventors FERRARESE ANDRE
UEHARA SAMANTHA
Designated States
Priority Data PI0502980 20.07.2005 BR
2006002165 14.07.2006 IB
Title
(DE) ÖLABSTREIFRING FÜR EINEN VERBRENNUNGSMOTOR
(EN) OIL-CONTROL RING FOR AN INTERNAL COMBUSTION ENGINE
(FR) SEGMENT RACLEUR POUR MOTEUR A COMBUSTION INTERNE
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) .

(FR)
L'invention porte sur un segment racleur d'un moteur à combustion interne destiné à être monté entre les parois latérales d'une rainure (10) du piston (P) et comprenant deux segments annulaires (20) et un ressort d'expansion annulaire (30) placé entre les deux segments annulaires (20) et présentant un corps de support (31) formant un plan d'appui pour chaque segment annulaire (20). Le segment racleur comprend également: au moins une section (40) du ressort d'expansion faisant saillie axialement du corps de support (31) dudit ressort d'expansion (30) et dépassant au moins un des plans d'appui d'un segment annulaire (20); et au moins une irrégularité superficielle (50) formée dans au moins un des segments annulaires (20), ses dimensions lui permettant d'être intégrée à l'épaisseur du segment annulaire correspondant (20) et d'interférer avec au moins une section (40) du ressort d'expansion afin de bloquer par rotation le segment annulaire (20) par rapport au ressort d'expansion (30).