| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an oil seal 1 capable of stabilizing the thickness of an oil film which is formed and the amount of leakage as the angle formed between a seal lip 2 and an axis 4 does not change siginificantly even if a cocking phenomenon occurs with the member to be slid such as the axis 4. <P>SOLUTION: In an oil seal 1 coming into tight contact with the objective member for free sliding such as the axis 4 at the lip end 3 of the seal lip 2, the lip end 3 comprises an R surface 7 between an oil side slope 5 and an atmosphere side slope 6. The R surface 7 continuously comprises an oil-side R surface 8 where the radius curvature r<SB>1</SB>of cross section is relatively small and an atmosphere-side R surface 9 where the radius of the curvature r<SB>2</SB>of a cross section is relatively large. The oil seal 1 comes into tight contact with the objective member for free sliding by both the oil-side R surface 8 and the atmosphere-side side R surface 9. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
