Branch pipe liner bag and branch pipe lining method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 28, 1999
Grant Date -
N/A
app pub date -
Feb 10, 1999
filing date -
Feb 12, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A branch pipe liner bag is provided for reliably lining a branch pipe even having a curved portion. The branch pipe liner bag has a tubular resin-absorbent material having a flange formed at one end thereof, the outer surface of which is covered with a highly air-tight film. The tubular resin-absorbent material is impregnated with an unhardened hardenable resin, and a separable tube is attached to the flange. According to this invention, since the separable tube is attached to the previously hardened flange of the branch pipe liner bag, the separable tube will never be torn or cut even if the branch pipe liner bag is everted and inserted into a branch pipe having a curved portion with a high fluid pressure, or even if the film covering the branch pipe liner bag is heated and therefore softened by a heat medium or heat generated by the hardening of the thermosetting resin. It is therefore possible to reliably line a branch pipe even having a curved portion, using the branch pipe liner bag, and repair the branch pipe.
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