Patent ID: 8096274

Claim:
A rocker arm arrangement for opening valves situated below the arrangement, the arrangement comprising: a rocker shaft forming a bearing journal having a central axis and a running surface, the journal having a first traverse oil channel below the central axis and leading to at least one outlet on the running surface; at least one rocker arm mounted on said rocker shaft for pivoting about said central axis from a base position to an actuating position in which a corresponding valve is open, each said rocker arm having a central bore and a second transverse oil channel having at least one inlet on the central bore; and a bearing shell press-fit into each said bore, each said bearing shell having an inner shell surface and an outer shell surface, the inner shell surface having a circumferentially extending internal groove having opposite ends which terminate below said central axis, at least one of said ends extending to a respective said at least one outlet when the rocker arm is in said base position, the outer shell surface having at least one circumferentially extending external groove extending to a respective said at least one inlet, the bearing shell having at least one opening connecting the internal groove to a respective said at least one said external groove.