초록 ▼

A method for blocking the bore of a pipe comprising moving an inflatable bag along the bore of the pipe from an access point in the pipe to a point where the bore is to be blocked, inflating the bag until it engages the internal wall of the pipe or main and causing the bag to maintain its inflated c

A method for blocking the bore of a pipe comprising moving an inflatable bag along the bore of the pipe from an access point in the pipe to a point where the bore is to be blocked, inflating the bag until it engages the internal wall of the pipe or main and causing the bag to maintain its inflated condition. Where an expandable foam is used.

대표청구항 ▼

[ We claim:] [1.] A device for blocking the bore of a pipe or main, comprising:a reservoir containing an expandable material,an inflatable bag stored in the reservoir in an inverted state and closing off an open end of the reservoir, andan insertion element detachably connected to the reservoir for

[ We claim:] [1.] A device for blocking the bore of a pipe or main, comprising:a reservoir containing an expandable material,an inflatable bag stored in the reservoir in an inverted state and closing off an open end of the reservoir, andan insertion element detachably connected to the reservoir for moving reservoir and the bag along the pipe or main from an access point in the pipe to the point where the bore is to be blocked.