EP 2241730 B1 20161228 - Valve stem seal with gas relief features
Title (en)
Valve stem seal with gas relief features
Title (de)
Ventilschaftdichtung mit Gasentlastungsfunktionen
Title (fr)
Joint de tige de soupape avec fonctions de libération de gaz
Publication
Application
Priority
EP 09005463 A 20090417
Abstract (en)
[origin: EP2241730A1] A valve stem seal can include an elastomeric component having a first portion for having a sealed engagement with a valve stem (34), and a pressure relief lip engaging a valve guide (36). The pressure relief lip can have a sealing configuration and a venting configuration. The venting configuration can allow excess exhaust gases to vent from a combustion chamber (26). After the venting of excess exhaust gases, the pressure relief lip can close to the sealing configuration to prevent oil from entering the combustion chamber (26). The elastomeric body or the valve guide can include a pressure relief channel. The elastomeric body can also include a bumper engaging the valve guide (36). The pressure relief channel can be disposed in the bumper.
IPC 8 full level
F01L 3/08 (2006.01)
CPC (source: EP)
F01L 3/08 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2241730 A1 20101020; EP 2241730 B1 20161228; HU E032708 T2 20171030
DOCDB simple family (application)
EP 09005463 A 20090417; HU E09005463 A 20090417