Patent ID: 8764019

Claim:
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 the seat, said gasket comprising: a tubular support element; a first elastically deformable portion including a dynamic seal 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, said second elastically deformable portion supported by said tubular support 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 a plurality of waves for creating a spring effect on said lip and which are spaced axially from said guide element along a direction parallel to said axis.