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| Number | Title | Issue Date |
| 7802384 | Method and device for excavating submerged stratum An excavation technique for a stratum capable of excavating a submerged stratum such as a layer containing an underground resource by using laser irradiation in liquid is provided. In this technique, a laser beam transmitted through laser transmission means 20 | 09/28/2010 |
| 6979152 | Intake nozzle for vacuum conveyor An intake conduit apparatus comprises an intake conduit adapted at a downstream output end thereof for connection to an intake of a vacuum conveyor, and adapted at an upstream input end thereof to facilitate entry of granular material. Ramps slope inward and downstr... | 12/27/2005 |
| 6966132 | Method and device for moving subsea rocks and sediments A method for moving subsea rocks and sediments which can be at significant depths, in connection with removal of protective rocks around installations where maintenance is to be conducted. Tubing with an ejector nozzle is arranged completely externally in relation t... | 11/22/2005 |
| 6904640 | Joint assembly of vacuum cleaner and vacuum cleaner having the same A vacuum cleaner having a joint assembly to selectively rotate an extension pipe with respect to a handle. The joint assembly has a joint body removably installed between the extension pipe and the handle to allow the extension pipe 130 to rotate with respect... | 06/14/2005 |
| 6874261 | Method for treating an underwater bed A method of forming a trench in the bed of a body of water, the bed having an initial undisturbed upper surface, comprises suspending a pressure line from a vessel floating on the body of water, the pressure line terminating downwardly in a downwardly directed nozzl... | 04/05/2005 |
| 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 |
| 6263594 | Dredging system The present invention is useful for dredging underneath a floating vessel, where a conventional dredge cannot reach the location of the material to be dredged. A neutral buoyancy pipe is attached to the end of the suction pipe and acts as an extension of ... | 07/24/2001 |
| 5979088 | Dredging installation An installation for sucking up material from the bed of a body of water includes a housing (1) that is provided with a suction pipe (2) which extends toward the bed of the body of water and that has a suction opening (22) and is connected to a pump (4) lo... | 11/09/1999 |
| 5913604 | Dredging installation An installation for sucking up material from the bed of a body of water includes a housing (1) that is provided with a suction pipe (2) which extends toward the bed of the body of water and that has a suction opening (22) and is connected to a pump (4) lo... | 06/22/1999 |
| 5553976 | Fluid riser between seabed and floating vessel An ocean riser assembly for conveying fluids between the seabed and the surface of the sea includes a fluid conveying pipe formed into a helical configuration or into a planar cyclically undulating configuration, such as a sinusoid, that extends longitudi... | 09/10/1996 |
| 5546682 | Sediment relocation machine The invention relates to an apparatus for relocating sedimentary materials particularly from the bottom of water channels. The invention utilizes a water jet fluidizer to displace sedimentary materials and to suspend them in a water flow. The water flow c... | 08/20/1996 |
| 5421105 | Dredging system A dredging apparatus for dredging waterways containing sediment includes a hood having a passage for water and sediment to enter the hood under the influence of a submersible dredge pump apparatus. The dredge pump apparatus includes an inlet line having a... | 06/06/1995 |
| 4926571 | Connection for connecting compressed-air lines A connection for connecting compressed-air lines arranged on the body of a floating dredge leading to measuring devices, control devices or the like, with measuring air lines mounted on a suction pipe of the floating dredge used for suction pipe position ... | 05/22/1990 |
| 4839061 | Method and apparatus for treatment of hazardous material spills Spills of hazardous materials are treated at the site of the spill using an integrated spill responder system which enables personnel to remain at a safe distance from the spill. The mobile, fully self-contained system is dispatched to the spill site and ... | 06/13/1989 |
| 4764137 | Floatable dredge hose A floatable heavy duty hose assembly for conveying fluid entrained materials during dredging and related operations which includes a flexible cylindrical conduit which is reinforced at spaced intervals and wherein a plurality of floats are mounted in surr... | 08/16/1988 |
| 4681372 | Deep sea mining apparatus An undersea mining apparatus including a hydraulically operated ejector pump for submerged use to provide a reduced pressure adjacent the outlet of a lift pipe, to thereby induce flow of mineral nodules from the ocean floor through the pipe. The jet flow ... | 07/21/1987 |
| 4622766 | Hand held suction nozzle with metal detector A device connecting a suction dredge to a metal detector search coil, providing a movable suction tube held perpendicular to the search coil, and centered approximately over the coil's area of maximum sensitivity, further allowing said suction tube to be ... | 11/18/1986 |
| 4552084 | Suction dredger In a suction dredger or the like, intended for use in ice-filled waters, there is an overflow tube with a stationary lower portion and a vertically movable upper portion. At the lower end of the stationary tube portion, there is a closure member partly co... | 11/12/1985 |
| 4521305 | Rotating self-cleaning screen A rotating self-cleaning screen capable of functioning as a dredge cutterhead, and also usable to screen debris from a conduit. A motor-driven rotating drum screen having openings defined in the periphery thereof includes a debris ejector rotating about a... | 06/04/1985 |
| 4479741 | Device for laying underground or digging up subsea conduits A self-propelling device for burying and digging up subsea conduits laid on beds of an incoherent material. The device has: disintegrating members using high pressure water jets to create a slurry of material, digging members having suction members which draw ... | 10/30/1984 |
| 4470208 | Dredge with adjustable bottom support for suction pipe and method Method for suctioning submerged bottom material with the aid of at least a suction pipe connected to a vessel, whereby said suction pipe is lowered from said vessel in an inclined or vertical position and an underpressure is created in said suction tube f... | 09/11/1984 |
| 4429476 | Self-immersing jet pump A jet pump which is used in dredging situations and includes a series of water nozzles which create a slurry in a sand mass by erosion thereof, the slurry being conveyed to a receiving station.... | 02/07/1984 |
| 4423559 | Gold dredge suction nozzle An elongated tubular member including inlet and outlet end sections is provided and each section includes inlet and outlet ends. The inlet end of the outlet section and the outlet end of the inlet section include coacting structure universally coupling th... | 01/03/1984 |
| 4413925 | Independently balanced support plates This invention provides apparatus for supporting extremely heavy weights, such as a lengthy horizontal pipe string for ocean floor mining or dredging, from a downwardly facing horizontal ledge surface. The apparatus comprises a pair of support plates arra... | 11/08/1983 |
| 4411079 | Suction drag system The invention relates to a suction drag system for dredging vessels which can be placed or removed respectively on an existing vessel, such as a hopper barge (1,2), the system comprising a suction pipe (26,28) with suction head, a suction pump (29) with d... | 10/25/1983 |
| 4408404 | Pivotable articulated support shoe for hydraulic nozzle This invention provides means for supporting a hydraulic nozzle (of the type utilized, for example, to obtain valuable mineral ores from ocean depths) with a support surface in a manner so that the attitude of the support surface relative to the ocean flo... | 10/11/1983 |
| 4373276 | Device for conveying a slurry, such as sand or gravel or the like, lying under water A dredger device for conveying sand or gravel or the like lying under water in which the material enters a conveyor head and is conveyed through a variable length tube into a receptacle on the dredger. In the interior of the variable length tube there is ... | 02/15/1983 |
| 4372337 | Rotary distributor valve The housing of a distributor valve has a first inlet for admission of a liquid which is maintained at a first pressure, a second inlet for admission of a liquid which is maintained at a higher second pressure, and at least two outlets. The cylindrical val... | 02/08/1983 |
| 4352251 | Hand operated suction dredge head and hydraulic submersible pump assembly A portable and lightweight suction dredge head which is held by a diver and is hand operated so as to be easily moved about in the working position. These heads are, for example of sizes from three inches to eight inches in intake diameter. The dredge hea... | 10/05/1982 |
| 4351122 | System for controlling the position of the drag pipe of a dredge Dredge with drag pipe, consisting of a number of pipe sections interconnected by hinged joints, whereby drag lines are connected to said hinged joints and to the front and rear end of the drag pipe and furthermore the rotatably supported front end of the ... | 09/28/1982 |
| 4346937 | Dredging apparatus including suction nozzles There is provided a dredge vehicle supporting a dredge assembly for collecting ore particles from the ocean floor. The dredge assembly includes several nozzles extending forwardly of the supports for the vehicle, pump means for developing a suction flow i... | 08/31/1982 |
| 4319414 | Dredgehead having forward water-deflecting means comprising two transverse elements Apparatus to direct the flow of water passing towards and alongside of a dredgehead (of the type, for example, utilized to obtain valuable mineral ores from the ocean depths) in a downwardly direction, so as to utilize the force of the water to assist the... | 03/16/1982 |
| 4319782 | Means for controlling feed of particulate material into airlift pipe To limit the amount of solid particulate matter fed into an airlift pipeline from, especially, a suction nozzle device, the density of the suspension passing from the suction nozzle to the airlift system is measured. If the measured density is above a pre... | 03/16/1982 |
| 4302052 | Modular hydraulic mining tool with slurry inlet metering An improved hydraulic mining tool is disclosed wherein the major components of the tool are formed as separate discrete modules, each including a high torsional strength common mounting flange which permits the modules to be interchangeably attached to on... | 11/24/1981 |
| 4282661 | Towing suction device for a dredging craft Towing suction device for a dredging craft, which device comprises at least one tube which extends in a dredging position at an angle of inclination with the horizontal outboard along side the craft, in which a displacable tube part is disconnectably coup... | 08/11/1981 |
| 4249324 | Steerable ocean floor dredge vehicle A steerable ocean floor dredge vehicle is provided which is of the towed variety, or partially self-propelled. The vehicle is towed from a surface ship via a rigid length of pipe or tubing, connected to the dredge vehicle via a pivoting joint permitting p... | 02/10/1981 |
| 4217709 | Submarine sand sampler A subsurface sampler which obtains samples of sand from offshore deposits. A 27 foot tube within a tube is lowered to the ocean floor while suspended from flotation tanks. The sampler is free of suspension cables and thus is detached from boat motions. Su... | 08/19/1980 |
| 4200999 | Pivotable means for decreasing drag effects on a generally cylindrical dredge pipe This invention provides a substantially flat plate hingedly connected to a substantially cylindrical pipe intended to be moved through the water in a generally longitudinal alignment, the plate extending behind the pipe during movement through the water. ... | 05/06/1980 |
| 4149739 | Dual passage pipe for cycling water to an undersea mineral aggregate gathering apparatus A dual passage string of pipe for use in cycling fluid from a ship to an undersea mineral aggregate gathering apparatus. The string of pipe is made up of sections of concentric inner and outer pipes. The outer pipes are screwed together and the inner pipe... | 04/17/1979 |
| 4147454 | Method of and apparatus for construction of pipes for marine use, as for ocean mining and the like The present invention is concerned with methods of and apparatus for constructing cylindrical structures such as large-diameter pipes for the transport of materials in ocean mining and the like, whereby one or more rolls of previously prepared sheet mater... | 04/03/1979 |
