| 摘要 |
A gasket (1) for a valve (2) of an internal combustion engine (3) is described; the valve comprises a guide element (15) defining a through seat, and a stem (16) movably sliding in such a seat; the gasket (1) comprises a tubular supporting element (22) coaxial to the valve (2), and an elastically deformable element (21) interposed between said supporting element (22) and the valve (2); the elastically deformable element (21) comprises a first portion (28) adapted to cooperate with the stem (16) of the valve (2), a second portion (29) adapted to cooperate with an external surface of the guide element (15) and a third portion (30) axially interposed between the first and the second portions (28, 29), overhangingly carrying a gas-tight lip (31) adapted to cooperate with the stem (16) of the valve (2), and comprising, on the side opposite to the lip (31), a surface (40) adapted to cooperate with a first region (41) of said supporting element (22); the third portion (30) is shaped so that, no matter how two points belonging to the surface (40) are chosen, the segment joining said points is completely contained within the third portion (30). |
