Abstract: A pump housing comprises a circumferential wall forming an outer wall of the pump housing; a pump casing which connects to the circumferential wall on a first outer side to form a first chamber, the pump casing comprising a central opening to form an axial supply of the pump housing for material to be pumped; and pressurizing means to pressurize the first chamber.

Abstract: A pump housing comprises a circumferential wall forming an outer wall of the pump housing; a pump casing which connects to the circumferential wall on a first outer side to form a first chamber, the pump casing comprising a central opening to form an axial supply of the pump housing for material to be pumped; and pressurizing means to pressurize the first chamber.

Abstract: The invention relates to a centrifugal pump (1) comprising a pump housing (2) which is provided with an axial inlet (6), an outlet (5) and a rotor (7) which is attached in the pump housing (2) such that it can rotate about an axial rotation axis A. The rotor (7) is provided with a central boss (9), a shaft shield (11) fastened to the boss (9), a suction shield (12) attached so as to be axially set apart from the shaft shield (11), which suction shield (12) has an axial supply (14) aligned with the axial inlet (6) of the pump housing (2), and a plurality of rotor blades (15) which are fastened between the shields (11, 12). The radial inner ends (18) of the rotor blades (15) are connected to the suction shield (12) by a substantial perpendicular connection.

Abstract: A suction head (1) for a dredger, includes;—an outlet (2) for fluidly coupling the suction head with a suction tube (3) for transport of dredge to the loading space of a floating dredger;—a sand inlet (4), which in use faces a sand bed (5) to be sucked away, for taking in a flow of dredge (6) in the suction head, and which flow of dredge runs in a dredge flow direction (7) at the sand inlet;—a side inlet (8) fluidly coupled with the sand inlet, wherein the side inlet and the outlet are arranged at opposite sides of the suction head for introducing a lateral flow (9) from outside the suction head into the suction head locally at the sand inlet, which lateral flow runs substantially transverse relative to the dredge flow direction.

Abstract: A vessel (4) includes a crane (1) connected to a deck (5) of the vessel. The crane (1) includes a frame (10) which is rotatable about a horizontal hinge axis (H), a rotation mechanism (20) connected to the frame (10) at a position away from the horizontal hinge axis (H), arranged to rotate the frame (10) about the horizontal hinge axis (H) from an upper position to a lower position and vice versa, and a swivel member (30), which is with a first end (31) rotatable connected to the deck (5) and which is with a second end (32) rotatable connected to the rotation mechanism (20). The swivel member (30) is rotatable between an inward position associated with the upper position of the frame (10) to an outward position associated with the lower position of the frame (10).

Abstract: The invention relates to a dredging arrangement for dredging material from an underwater bottom (6). The dredging arrangement comprises a drag head body (11) and a visor (12), the visor (12) being connected to the drag head body (11) and is moveable with respect to the drag head body (11) over a predetermined range. The biasing device (60) is provided in between the drag head body (11) and the visor (12) exerting a biasing force on the visor (12) over a biasing portion of the predetermined range, the biasing portion being at least 25% of the range.

Abstract: A vessel (4) includes a crane (1) connected to a deck (5) of the vessel. The crane (1) includes a frame (10) which is rotatable about a horizontal hinge axis (H), a rotation mechanism (20) connected to the frame (10) at a position away from the horizontal hinge axis (H), arranged to rotate the frame (10) about the horizontal hinge axis (H) from an upper position to a lower position and vice versa, and a swivel member (30), which is with a first end (31) rotatable connected to the deck (5) and which is with a second end (32) rotatable connected to the rotation mechanism (20). The swivel member (30) is rotatable between an inward position associated with the upper position of the frame (10) to an outward position associated with the lower position of the frame (10).

Abstract: The invention relates to a centrifugal pump (1) comprising a pump housing (2) which is provided with an axial inlet (6), an outlet (5) and a rotor (7) which is attached in the pump housing (2) such that it can rotate about an axial rotation axis A. The rotor (7) is provided with a central boss (9), a shaft shield (11) fastened to the boss (9), a suction shield (12) attached so as to be axially set apart from the shaft shield (11), which suction shield (12) has an axial supply (14) aligned with the axial inlet (6) of the pump housing (2), and a plurality of rotor blades (15) which are fastened between the shields (11, 12). The radial inner ends (18) of the rotor blades (15) are connected to the suction shield (12) by a substantial perpendicular connection.