Patent ID: 6571761
Filing Date: 2003-06-03
Classification: F01L

Abstract:
A valve stem seal assembly for an internal combustion engine, said assembly comprising:a) a cylindrical retainer defining a longitudinal axis, said retainer having a cylindrical body defining an interior surface, and a circumferentially oriented annular end wall integral therewith that defines an upper extremity thereof, said end wall positioned radially inwardly relative to said axis, said retainer further defining a lower flanged portion; and b) an elastomeric valve stem seal body disposed on the interior of said cylindrical body of said retainer, said seal body having first and second interiorly disposed annular sealing members, wherein the first annular sealing member is adapted to engage a reciprocally movable valve stem supportably mounted in a valve guide of an internal combustion engine; a portion of the second annular sealing member protrudes below a bottom surface of said lower flanged portion of the retainer, wherein said portion of said second sealing member is adapted to engage a cylinder head portion of the internal combustion engine, said bottom flanged portion of said retainer adapted to be situated against said cylinder head portion, and wherein said second elastomeric sealing member is contiguous with said first elastomeric sealing member, wherein said second elastomeric sealing member including a plurality of circumferentially spaced windows that define areas in which the interior surface of the retainer is exposed.