B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
189/12
B23B 35/00 (2006.01) F16L 55/1645 (2006.01) F16L 55/26 (2006.01) H03K 3/356 (2006.01) H03K 17/687 (2006.01)
Patent
CA 1202916
ABSTRACT METHOD OF AND APPARATUS FOR REPAIRING DRAINS AND UNDERGROUND PIPELINES For repairing a drain or pipeline defect (which in the illustrated case is a major collapse, but may be a minor leak, hole or other defect), after cleaning by high pressure water or other methods and/or after reaming out the drain, an ejector body 20 is pushed by rods or is drawn into place by means of a hauling cable 80 until its leading end is to one side and its trailing end is to the other side of the defect. Thereupon, sealing rings 38 are inflated to seal the body's ends, and the components of a multi- component hardening composition are supplied by way of ducting 58 so as to meet and mix in the body 20 and emerge through holes 54 to fill the entire defect and any registering voids in the surrounding earth. Before the composition is fully set, the body 20 is displaced along the drain or pipeline, and the re- maining hardening compound serves to replace the defective or missing drain or pipeline material. After withdrawal of the body 20, the repair may be reamed again, and/or polished.
426875
A.m.k. Pipe Technology Limited
Riches Mckenzie & Herbert Llp
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