Patent ID: 6412467
Filing Date: 2002-07-02
Classification: F01L

Abstract:
A valve stem seal assembly module adapted for installation atop of a valve guide of an internal combustion engine for sealingly engaging a valve stem reciprocally movable through the guide, said module comprising a resilient annular valve stem seal adapted to engage the valve stem and further comprising a seal retainer for circumferentially and frictionally containing said seal, said seal retainer defining a rigid elongate cylindrical body having a longitudinal axis and a circumferentially extending annular flange at its lower end and at least one radially inwardly extending first boss at its upper end, said module further comprising an annular rigid spring retainer including a lower extremity having at least one radially outwardly extending second boss adapted for interlockingly engaging said first boss of said seal retainer in a pre-assembly mode, said spring retainer comprising a radially outwardly extending flange at its upper extremity; said module further comprising an elongate valve return spring having longitudinal extremities engaging said spring retainer flange and said seal retainer flange, respectively, whereby engaging contact between said first and second bosses of said spring retainer and said seal retainer is established in said pre-assembly mode.