| 摘要 |
A temporary pipeline plug includes a cylindrical outer shaft defining an interior passage which receives and supports an interior shaft. A pair of pressure plates are adjustably supported at one end of the inner and outer shafts and captivate an expandable resilient member therebetween. The expandable member is expanded by compressive force between the pressure plates created by relative rotation of the inner shaft with respect to the outer shaft. A multiply spoked anchor is secured to the opposite end of the outer shaft and an intermediate support member is rotatably supported upon the outer shaft to provide a safety support for the pipeline plug when installed. |
