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| Number | Title | Issue Date |
| 8298347 | Method and apparatus for cleaning a substantially vertical surface A method of and apparatus for cleaning a surface, such as a wall of a waste boiler of a Kivcet furnace, are described. The invention comprises suspending a pair of spaced apart cables adjacent a surface to be cleaned, attaching ends of the rail to respective ones of... | 10/30/2012 |
| 7159600 | Scarifying apparatus for interior surface of pipeline field The invention relates to an apparatus for scarifying the interior surface of a sewer pipe. The apparatus consists of a chassis, with an outer frame coupled to the chassis and an inner frame slidably coupled to the outer frame. Two extendible arms are attached to opp... | 01/09/2007 |
| 7100622 | Pipe scarifier A scarifier for scarifying an interior surface of a sewer pipe, which includes an elongated frame having spaced apart upstanding frame elements at either end forming a plurality of guide surfaces on each side. A first track extends from one end of the frame to anoth... | 09/05/2006 |
| 7066188 | Interior sewer pipeline scarifying apparatus This application discloses an apparatus for scarifying the interior surface of a sewer pipe, which can remain in the sewer under active flow conditions. The apparatus includes at least one scarifying head, which may transverse back and forth along a rail assembly, w... | 06/27/2006 |
