| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sealing device which attains low torque. <P>SOLUTION: The sealing device includes: a first plastic seal ring 10 structured to make the tip end 12a of the lip part 12 thereof contact with the inner circumferential surface of a shaft hole 310 by making the diameter of the first seal ring 10 itself expanded as fluid pressure at high pressure side (H) rises; and a second seal ring 20 of an elastic body mounted to the high pressure side (H) than the first seal ring 10 in an annular groove 210 and structured to press the body part 11 by the fluid pressure and to come into close contact with the groove bottom surface of the annular groove 210. <P>COPYRIGHT: (C)2013,JPO&INPIT |
