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| Number | Title | Issue Date |
| 5327794 | Device for driving a tool positioned on a pivotable part Device for driving a tool (4) positioned on a pivotable part (2). The device comprises a combustion engine (5) or the like which is arranged stationary, such that the extension of the motor drive shaft (6) is perpendicular to and crosses the pivot axis (2... | 07/12/1994 |
| 4646450 | Handling device for suction head equipment The invention relates to the rapid exchange of a detachably fastened part such as the suction head (3) of the suction pipe (2) of a hopper suction dredge (1) or a part of the suction head by a rapid-action coupling (7,8) and by a device (10,12,13,14,15) o... | 03/03/1987 |
| 4597200 | Detachable coupling for a suction head Suction pipe with trailing head for a trailing suction dredger, the pipe being provided at its lower end with a connection piece of the trailing head in which the essentially rectangular throughflow opening of the trailing head passes into the circular cr... | 07/01/1986 |
| 4584784 | Method and device for maintaining tools at a level A tool is controlled below a water surface by carrying out a level comparison between a level-fixed measuring element postioned on land and a level-varying measuring element belonging to the tool and by adjusting the level of the tool with respect to a fl... | 04/29/1986 |
| 4545139 | Under ice pipelay apparatus and method A construction machine with a cutter is provided to simultaneously cut a slot in an ice sheet, to excavate a trench in the underlying seabed, and to bottom-tow a pipeline in the trench formed by the cutter.... | 10/08/1985 |
| 4464851 | Underwater harvester for marine life A mechanical harvester for marine bivalve mollusks and the like. A harvester head is provided for movement along a bottom to be harvested, which head includes driven tined elements for dislodging mollusks from the bottom and for removing dislodged mollusk... | 08/14/1984 |
| 4352250 | Suction dredger installation A suction dredger installation provided with a vessel, at least one pump, at least one suction pipe hingedly connected to the vessel, said suction pipe comprising three pipe sections hingedly interconnected, the first of which is supported by a ladder, an... | 10/05/1982 |
| 4289355 | Attachment flange for flexible conduit A plate is attachable to a supporting structure such as a wall. Means carried by the plate encircle and hold a flexible conduit passing through the plate and the structure. The conduit is detachably held at adjustably selected positions along the length t... | 09/15/1981 |
| 4242814 | Cutter wheel for a dredging apparatus A cutter wheel for a dredging apparatus mounted for rotation about a shaft and having outwardly projecting cutting blades mounted on openings formed in the cylindrical peripheral plane of said wheel, while a stationary suction mouth is provided inside sai... | 01/06/1981 |
| 4127288 | Movable connection for line sections Movable connection between each time two parts of at least one line and a support construction substantially parallel therewith and connected thereto to enable a pivoting movement substantially about a longitudinal axis parallel to the longitudinal axes o... | 11/28/1978 |
| 4123860 | Flexible connections for suction dredger pipes Rigid pipe sections of a dredger are pivotally connected to allow universal movement therebetween and a flexible, elastic bellows communicates the adjacent ends of the pipe sections. The bellows in its free state is prestressed so as to be under compressi... | 11/07/1978 |
| 4083135 | Flexible connecting arrangement for suction dredgers A dredging pipe assembly includes at least two rigid sections physically connected together by a cardan joint and connected for fluid continuity by a pair of flexible sections disposed in spaced apart relation with the cardan joint between them. A flexibl... | 04/11/1978 |
| 4083133 | Swingable water and slush tube assembly for suction dredgers In a suction dredger, the connection between the water tube flange and the water duct flange is more reliable in operation, if the slush tube is adapted to turn by means of a rotary gland with respect to the slush tube flange to be rigidly coupled with th... | 04/11/1978 |
| 4058914 | Alternate flow suction dredge Suction dredges of a character having a flexibly mounted suction tube ladder provided on its free end with a suction head having dual mouths opening in opposite directions and a valve therein to afford selective opening of one or the other of the mouths. ... | 11/22/1977 |
| 4023518 | Dredge pipe coupling system A system of subaqueous excavation and material removal having the combination of a hopper dredging vessel, hopper barges with independent dumping capacity and a prime mover vessel such as a tug, each barge having a stern notch and a bow portion which is c... | 05/17/1977 |
| 3973512 | Ship connecting structure A system of subaqueous excavation and material removal having the combination of a hopper dredging vessel, hopper barges with independent dumping capacity and a prime mover vessel such as a tug, each barge having a stern notch and a bow portion which is c... | 08/10/1976 |
