Inflatable seal for pipes comprises core surrounded by inflatable cylindrical sleeve whose outer surface fits against inner surface of pipe, core being open at both ends so that it forms by-pass

摘要

The inflatable seal for pipes (8) of different diameter comprises a core (1) which is surrounded by an inflatable cylindrical sleeve (4). The outer surface (5) of this is flexible but not elastic and fits against the inner surface (10) of the pipe. The core is open at both ends so that it forms a by-pass.