| 摘要 |
In a rotation shaft seal provided with a rubber lip portion (3), disposed between a housing (1) and a rotation shaft (2) and sliding on the rotation shaft (2), and a supporting member (4) receiving the lip portion (3) from a low-pressure side (40), the cross-sectional configuration of the lip portion (3) in free state is a trapezoid diminishing to the end having the maximum thickness portion (7) within an area (Z) received by the supporting member (4). |
