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| Number | Title | Issue Date |
| 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 |
| 6550486 | Apparatus for scarifying the interior surface of a pipeline This application discloses an automated apparatus for scarifying the interior surface of a pipe or other similar elongated passageway. The apparatus includes a vehicle that propels itself down the inside of the pipe. A scarifying assembly is removably sec... | 04/22/2003 |
| 6435620 | Multiple jet hydrodemolition apparatus and method Apparatus for the hydrodemolition of concrete layer including a movable vehicle, a bed having a guideway extending transversely to a direction of movement of the vehicle, a nozzle assembly having a guide slidably engaging the guideway and a plurality of n... | 08/20/2002 |
| 6418947 | Scarifier for interior surface of pipeline Apparatus for scarifying an interior surface of a pipe both of round and non-round cross section. The apparatus, which has a nozzle for discharging fluid under pressure against the interior surface of the pipe, also has a vehicle moveable along an interio... | 07/16/2002 |
