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| Number | Title | Issue Date |
| 7334358 | Portable dredging equipment A portable dredging apparatus comprising a cutter housing in communication with a hydraulic power supply and a discharge pump through lengths of tubing whereby said cutter housing is submersible. The cutter housing is comprised of a platform having walls depending t... | 02/26/2008 |
| 7181871 | Sludge harvester for removing sludge from sludge ponds A sludge harvester for removing a concentrated nutrient sludge from a sludge pond includes a frame, one or more wheels or skids attached to the frame, means for gently breaking up at least a portion of the sludge layer adjacent to a dilute layer, and means for captu... | 02/27/2007 |
| 7117618 | Combination bucket/breaker apparatus for excavator boom stick An excavating machine, representatively a tracked excavator has a boom stick portion on which both an excavating bucket and a hydraulic breaker are mounted for hydraulically driven pivotal movement between first and second limit positions. The bucket may be operated... | 10/10/2006 |
| 6848860 | Maintenance apparatuses for permeability improvement in fluid containment basins The apparatuses for improving the permeability of a fluid containment basin having a plurality of ridges and furrows in the bottom of the basin are configured to disturb sediment that has settled on the ridges so as to place the sediment back into suspension. In one... | 02/01/2005 |
| 6209965 | Marine clathrate mining and sediment separation A method and apparatus for mining of hydrocarbons from a hydrocarbon-containing clathrate such as is found on the ocean floor. The hydrocarbon containing clathrate is disaggregated from sediment by first disrupting clathrate-containing strata using contin... | 04/03/2001 |
| 6085446 | Device for excavating an elongated depression in soil An excavating device has conical milling tools each having a longitudinal center axis. At least one motor is provided for rotatingly driving the milling tools about their longitudinal center axis. The milling tools each have a mantle surface. The mantle s... | 07/11/2000 |
| 6053663 | Device for creating a local water flow A device for creating a localized water jet within a body of water allows for the displacement of material from the floor of the body of water. The device includes two powered screws within a jet pipe. The screws are arranged coaxially and their direction... | 04/25/2000 |
| 6003952 | Underwater mining machine An underwater mining machine includes a chassis mounted on a powered drive arrangement for driving the chassis on an underwater surface, the chassis having a front end and a rear end and being adapted to be manoeuvrable and driven in at least a forward di... | 12/21/1999 |
| 5950732 | System and method for hydrate recovery A system for recovering liquid hydrocarbons from hydrates on an ocean floor includes a vessel, a positioning subsystem coupled to the vessel for holding the vessel in a desired location over a hydrate formation, a hydrate recovery subsystem coupled to the... | 09/14/1999 |
| 5617654 | Dredge rotary cutter head A dredge apparatus with an improved cutter includes a hull, a boom extending from the hull, and a cutter element rotatably mounted at the free end of the boom. The cutter element is positioned adjacent a suction line that is supported by the boom. The imp... | 04/08/1997 |
| 5603204 | Aquatic plant harvester Floating aquatic vegetation is harvest from the surface of a body of water. The vegetation is chopped or shredded when floating in situ on the body of water. The vegetation is then removed from the water surface. The chopping, shredding, tearing or other ... | 02/18/1997 |
| 5447018 | Aquatic plant de-rooting apparatus An aquatic plant de-rooting apparatus includes a jib and a vertically adjustable hanger to be mounted on a vessel. The hanger carries two forwardly convergent rotors, each with a series of flat blades projecting radially from it. The rotors are independen... | 09/05/1995 |
| 4946227 | Bucket wheel assembly A bucket wheel assembly for excavating solid material from the ground which can be slurried with water has a series of buckets mounted on a framework rotatable about a substantially horizontal axis, the buckets, being secured to the framework at spaced po... | 08/07/1990 |
