Inflatable cushion system for blocking of pipe, assembled of core cushion and several jacket cushions as required

摘要

The cylindrically shaped core cushion (1) provided with a valve and several gas outlets positioned at its convex outer wall (3) is inserted into the pipe and inflated. The ring shaped jacket cushion (4) is placed around the core (1) and inflated after being positioned. More jackets (4) can be added until the space to be blocked is filled. The gas is guided from the core (1) to all jackets (4) through the specific openings provided. The material used is flexible but not elastic in order to achieve a perfect sealing effect.