| 摘要 |
PCT No. PCT/AU87/00002 Sec. 371 Date Oct. 30, 1989 Sec. 102(e) Date Oct. 30, 1989 PCT Filed Jan. 2, 1987 PCT Pub. No. WO87/04223 PCT Pub. Date Jul. 16, 1987.A sealing member for sealing between a rotating surface (12) and a stationary cylindrical surface (13). The sealing member (8) is sealing engaged to the rotating surface (12) and is so constructed that) at a rotational speed greater than a predetermined speed of rotation of the rotating surface, the seal lip (27), due to centrifugal force, disengages from the stationary cylindrical surface (13) and, at or below the predetermined speed of rotation, sealingly engages the stationary cylindrical surface (13). |
