| 摘要 |
PCT No. PCT/GB96/01200 Sec. 371 Date Feb. 12, 1998 Sec. 102(e) Date Feb. 12, 1998 PCT Filed May 20, 1996 PCT Pub. No. WO96/37726 PCT Pub. Date Nov. 28, 1996A self-centering suspension for use in supporting a vehicle or vehicles intended to travel in a pipeline includes a body and two sets of three wheels spaced apart along the length of the body. Each wheel is mounted on a lever arm biased by torsion springs against the inner surface of the pipeline. Each lever arm has a stub arm which is eccentrically arranged relatively to a rotary joint in the form of a pin, and the stub arm slidingly engages a circumferential groove in a ring. Each ring slides on the body. A set of three wheels are thus constrained to move inwards and outwards together. |
