An elastomeric valve stem seal component is adapted for installation over a valve guide of an internal combustion engine. The seal component incorporates fabric reinforcement within an annular jacket body of the component. In one preferred form, the fabric is positioned intermediate two elastomeric layers...http://www.google.fr/patents/US6659469?utm_source=gb-gplus-shareBrevet US6659469 - Molded rubber jacket with fabric reinforcement for valve stem seal
Molded rubber jacket with fabric reinforcement for valve stem seal
