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| Number | Title | Issue Date |
| 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 |
| 6719494 | Cable and pipe burial apparatus and method An apparatus for burying cables and pipes in soil includes a support structure adapted for movement across a surface of the soil. A water jetting machine is provided for producing a source of pressurized water. At least two jetting arms are in fluid communication wi... | 04/13/2004 |
| 6647853 | Seabed mine clearance This disclosure relates to a vessel having means at the bow of the vessel to direct a water flow ahead of the vessel downwardly towards the sea bed in front of and to either side of the path of the vessel to displace material from the sea bed including an... | 11/18/2003 |
| 6618966 | Fluid lance apparatus The present invention is a lance for removing dirt or other substances from an underground hole, by the use of air and water under high pressure. The water is used as an abrading material or lance to loosen dirt in a hole or to pick or chip off substances... | 09/16/2003 |
| 6125560 | Dredging apparatus A dredging apparatus comprising a body mounting thruster to direct, in use, a wash of water downwards towards an area of sea bed or the like, connection device to connect the dredging apparatus to a support vessel above the sea bed, said connection device... | 10/03/2000 |
| 6095721 | Method and device for burying a conduit under water A method for the penetration of a body (8), having a leading edge (21) and an inclined ground contacting surface (C, D, E) extending upwardly therefrom, into a porous ground material, the pores of the ground material being at least partially filled with w... | 08/01/2000 |
| 5890840 | In situ construction of containment vault under a radioactive or hazardous waste site A method is disclosed for constructing, verifying, and maintaining underground vaults that isolate and contain radioactive burial sites. The method employs a buoyant lift technique to isolate a block of soil containing the contaminates from the surroundin... | 04/06/1999 |
| 5765965 | Apparatus for in situ installation of underground containment barriers under contaminated lands An apparatus for constructing a subsurface containment barrier under a waste site disposed in soil is provided. The apparatus uses a reciprocating cutting and barrier forming device which forms a continuous elongate panel through the soil having a defined... | 06/16/1998 |
| 5542782 | Method and apparatus for in situ installation of underground containment barriers under contaminated lands An apparatus for cutting soil and constructing sub-surface containment barriers, such as for constructing subsurface containment walls or basins around and under contaminated soils, comprises an elongated beam for abutting an extended length of soil. The ... | 08/06/1996 |
| 5481815 | System to reduce sediment toxicity A method and apparatus for the treatment of sediment. The apparatus provides a plurality of injection sites for injecting a biochemical oxidant into the sediment. The oxidant is useful for oxidizing a bacterial growth inhibitor to a non-inhibiting form th... | 01/09/1996 |
| 5435083 | Aquatic weed eradicator An apparatus and method for removing unwanted vegetation (46). A fork (12) is provided having a vibratory motor (38) attached thereto. The fork is inserted into the rooting medium (48) surrounding the root mass (50) of the vegetation. While the fork is in... | 07/25/1995 |
| 5305585 | System for uprooting aquatic plants An aquatic plant uprooter for ridding a body of water of undesirable plantlife, composed of a hollow handle, a hollow discharge member connected at right angles to the handle, and a plurality of regularly spaced apart nozzles connected with the discharge ... | 04/26/1994 |
| 5288172 | Water jet system for trenching of pipelines A water jet system for trenching of a cable or a pipe below the floor of a river, lake, gulf or ocean bottom. Two opposed water jet legs are carried on a carriage forward of venturi tubes for disposing of the trenched bottom. The carriage includes a hydra... | 02/22/1994 |
| 5285587 | Underwater mining dredge Dredging apparatus (10) is provided with a flow conduit (18), a first pump (28), a second pump (30), and two valves (34, 44). The flow conduit (18) comprises a first leg (20) extending downwardly to a lower portion (22) and a second leg (24) extending upw... | 02/15/1994 |
| 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 |
| 4943186 | Device for the displacement of sediment under water and process for the use of such a device Device and process for the displacement of sediment under water by means of water jets which liquify the sediment so that it flows away under water without polluting the surface water, the improvement being that the device has laterally directed outflow o... | 07/24/1990 |
| 4932144 | Remote underwater excavator and sampler An underwater excavator in which when energized by a supply of hydraulic oil or other means a propeller is set in motion with water being drawn through a water intake into a cylindrical tube and expelled at the water outlet to create a flow of water of su... | 06/12/1990 |
| 4840729 | Oil spill recovery apparatus Crude oils and other oleaginous substances which have washed onto and socket thoroughly into coarse bottom sediments such as sand beaches and sediments forming the bottom of certain holding ponds may be released for recovery by mechanical or hydraulic plo... | 06/20/1989 |
| 4819347 | System for removing submerged sandwaves An apparatus for removing submerged sandwaves includes a transversely elongate manifold having an array of parallel, transversely spaced-apart fluid jets and an elongate eductor plate parallel to and spaced apart from the manifold so as to form a transver... | 04/11/1989 |
| 4787777 | Method and device for progressively producing an underwater laying-out channel A method for progressively producing an underwater laying-out channel (3) for an object (53) to be laid out, like a cable or the like, in an underwater ground by flushing and by mechanically loosening ground formations (7) which are resistive against flus... | 11/29/1988 |
| 4604000 | Method for removing sludge or mud from the bottom of a water area The invention relates to a method and apparatus for the removal of mud from the bottom of a water area by injecting water into said mud which injection according to the invention is done in such a way that the mud layer is changed into a mud layer having ... | 08/05/1986 |
| 4491368 | Method for dredging rock with a pick and water jet combination A method for breaking out rock from a rock bottom under water, in which a cutting means having at least one pick is moved through the rock bottom. During the cutting procedure at least one water jet is directed from a nozzle towards the disintegrating zon... | 01/01/1985 |
| 4073079 | Device for pumping out sanded in crab pots A nozzle pipe has upper and lower guide rings to guide the nozzle down a pot line to the crab pot. A hydraulic pump on the pipe discharges a jet of sea water to wash away drifted sand which anchors the crab pot to the sea bottom. The pump is driven by a h... | 02/14/1978 |
| 4047580 | High-velocity jet digging method The method of digging by piercing soil and rock with a jet of liquid discharged at high velocity from a nozzle together with high-velocity air jets discharged from another nozzle arranged concentrically around the liquid nozzle, characterized by the veloc... | 09/13/1977 |
