Patent ID: 7900932
Filing Date: 2011-03-08
Classification: F01L

Abstract:
1. A valve stem seal assembly, comprising: an annular valve seal retainer that includes upper and lower portions that are connected together by a single step; wherein the diameter of the upper portion is less than the diameter of the lower portion; wherein an outwardly radially extending flange is integrally connected perpendicular to the lower portion of the annular valve seal retainer; and an annular elastomeric sealing member having a first radially inwardly directed sealing lip and a second substantially radially inwardly directed sealing lip, wherein the annular elastomeric sealing member engages only a top surface of a valve guide; wherein said sealing lips do not extend above said upper portion of said annular valve seal retainer; wherein the annular elastomeric sealing member is bonded to an interior wall of the upper portion of the annular valve seal retainer; and wherein the first sealing lip has a generally vertical planar portion that extends a predetermined length parallel to the upper portion of the annular valve seal retainer which provides support to the vertical planar portion so as to provide a single continuous gripping surface.