Repair in holes and cracks in clay sewer pipe

Claim 1

In aoparatus for repairing a sewer line having a fracture, (a) a liner sleeve, and an elastomer sleeve extending about the liner sleeve, (b) means for installing the liner sleeve and said elastomer sleeve endwise in the sewer line to locate the two sleeves in bridging relation with the fracture, (c) means for displacing filler between the two sleeves to cause the elastomeric sleeve to expand and seal along its length against the sewer line in adjacent bridging relation with the fracture, (d) said means for displacing filler comprising a delivery system including elongated hose means extensible underground, and means to releasably attach said system to said liner sleeve, for travel in the sewer line, and for release from the liner sleeve after said filler displacement, (e) there being a fitting in said sleeve and a fixture to pass filler through said fitting to which said fixture is releasably and controllably clamped, and ducting in said fixture to mix said filler, and including a fluid pressure responsive actuator to maintain the fixture releasably clamped to said fitting, and a fluid pressure line extensible in the sewer to said actuator.