| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealing device fully exerting a pumping function in an initial condition while improving the sealing performance. SOLUTION: This sealing device is provided with a surface contact part 9c contacting a rotational shaft 20 with surface to surface in the initial condition after installed between a housing 10 and the rotational shaft 20 at a connection area of continuously provided parallel thread projections 9d and concave thread projections 9. |
