Gasket for a Valve in an Internal Combustion Engine

A gasket for a valve of an internal combustion engine, said valve comprising a guide element defining a through seat, and a slidingly displaceable rod in such a seat, said gasket comprising:

• a first elastically deformable portion adapted to cooperate with the rod of said valve;
• a second elastically deformable portion adapted to cooperate with an outer surface of said guide element;
• and
• a third elastically deformable portion interposed between said first and second elastically deformable portions and bearing a cantilevered gas tight seal lip adapted to cooperate with said rod of said valve;
• said lip displaying a frustoconical configuration having a decreasing section in opposite direction to the pressure forces directed in use towards said first elastically deformable portion and being connected to said third elastically deformable portion at its greater portion part;
• wherein said lip is connected, on the side exposed to said pressure forces, to said third elastically deformable portion by means of a surface bearing at least one wave.