Patent ID: 8468994
Filing Date: 2013-06-25
Classification: F01L

Abstract:
1. A valve assembly for an engine comprising: a tubular valve stem guide seated in the engine head and having a bore; a valve having a valve stem reciprocably slidable in the bore of the valve stem guide; a lower valve stem seal having an annular body sealingly surrounding the valve stem and a skirt at the lower end of the lower valve stem seal overlying the valve stem guide and sealing therewith; and an upper valve stem seal having an annular body sealingly mounted on the valve stem for reciprocating movement with the valve stem and including a skirt portion at the lower end thereof overlapping with the annular body of the lower valve stem seal during the reciprocating movement; whereby the upper and lower valve stem seals cooperate to prevent flow of oil to the bore of the valve stem guide.