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US4506591A
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Ocean floor dredge system having a pneumohydraulic means suitable for providing tripping and heave compensation modes
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US4438902A
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Pipe string lift system
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US4407716A
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Liquid flow system including multi-axial liquid flow screening means for excluding oversized slender objects carried by a liquid
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US4387518A
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Separable liquid flow screening means for excluding oversized, slender objects carried by a liquid, and dredge means including same
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CA1116189A
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Steerable ocean floor dredge vehicle
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US4347675A
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Dredging means having means for excluding oversized slender objects
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US4367601A
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Separable means for excluding oversized slender objects
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US4408404A
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Pivotable articulated support shoe for hydraulic nozzle
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US4327505A
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Remotely steerable dredge vehicle
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US4319782A
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Means for controlling feed of particulate material into airlift pipe
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US4346937A
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Dredging apparatus including suction nozzles
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US4319414A
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Dredgehead having forward water-deflecting means comprising two transverse elements
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US4382361A
|
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Ocean floor dredge system having a pneumohydraulic means suitable for providing tripping and heave compensation modes
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US4323216A
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Balanced support plates
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US4347029A
|
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Pipe transfer system
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US4365787A
|
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Pipe string lift system
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US4413925A
|
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Independently balanced support plates
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US4249324A
|
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Steerable ocean floor dredge vehicle
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US4311342A
|
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Dredge head with mechanical and pumping action
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US4200999A
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Pivotable means for decreasing drag effects on a generally cylindrical dredge pipe
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