Valve stem seal

Details Valve stem seal Valve stem seal

F - Mech Eng,Light,Heat,Weapons

16

J

277/27

F16J 15/50 (2006.01) F01L 3/08 (2006.01) F16J 15/32 (2006.01)

Patent

CA 1138913

076178-BR VALVE STEM SEAL Abstract: A valve stem seal for an intake or exhaust valve in an internal combustion engine where the seal allows a metered amount of oil to run down the valve stem for lubrication of the stem in its valve guide. The seal is formed of a relatively rigid valve seal body (32) having a cylindrical wall or skirt engaging the valve guide boss and an upper radially inwardly offset cylindrical wall of a smaller diameter with a radially inwardly extending flange (37) having metering grooves (39,40) on the upper and lower surfaces thereof, and a resilient insert (43) or collar is positioned on the flange to sealingly engage the reciprocating valve stem; the motion of the collar during reciprocation of the valve stem providing a pumping action through the metering grooves.

334470

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