Microdredging systems comprising a pumping platform and loading platform are described. In certain embodiments, system operates autonomously and is adapted to allow the loading platform undock from the pumping platform for disposal of the removed sediment.

Microdredging systems comprising a pumping platform and loading platform are described. In certain embodiments, system operates autonomously and is adapted to allow the loading platform undock from the pumping platform for disposal of the removed sediment.

A pipe layer attachment for an excavator includes a winch configured to wind and unwind a cable having a hook attached thereto. The pipe layer attachment also includes a pipe layer boom configured to mount onto a boom of the excavator as a cantilever with the pipe layer boom extending beyond an end of the boom. The pipe layer boom is configured to be connected to an arm attachment pin connection of the boom and an arm cylinder pin connection of the boom.

Microdredging systems comprising a pumping platform and loading platform are described. In certain embodiments, system operates autonomously and is adapted to allow the loading platform undock from the pumping platform for disposal of the removed sediment.

Microdredging systems comprising a pumping platform and loading platform are described. In certain embodiments, system operates autonomously and is adapted to allow the loading platform undock from the pumping platform for disposal of the removed sediment.

Described are a vessel and vessel/barge systems for dredging underwater surfaces. The vessel includes a hull with a bottom, bow portion, stern portion, port side, and starboard side. The vessel also includes a deck supported by the hull and a pump system mounted within the hull. A drag arm pivotably couples to the pump system. The vessel additionally includes a void defined by contiguous watertight walls or bulkheads joined to and extending upward from the bottom of the hull. The contiguous watertight walls or bulkheads are (i) vertically extensive of a perimeters of an aperture in the bottom of the hull, (ii) outboard, astern, and forward the aperture, or (iii) some combination thereof. The barge is releasably coupled to the vessel. Moreover, the barge is in fluidic communication with the drag arm.

Microdredging systems comprising a pumping platform and loading platform are described. In certain embodiments, system operates autonomously and is adapted to allow the loading platform undock from the pumping platform for disposal of the removed sediment.

Microdredging systems comprising a pumping platform and loading platform are described. In certain embodiments, system operates autonomously and is adapted to allow the loading platform undock from the pumping platform for disposal of the removed sediment.

Disclosed is a low-thickness rolling guide telescopic rocker arm, which includes a telescopic arm bracket, a rolling friction telescopic arm, an up/down-rolling support telescopic arm guide mechanism, and a left/right-righting telescopic arm guide mechanism. The up/down-rolling support telescopic arm guide mechanism includes an up/down support telescopic arm guide wheel or an up/down support telescopic arm guide piece. The up/down support telescopic arm guide wheel includes an up/down support guide axle and an up/down support sleeve wheel. The up/down support guide axle and the up/down support sleeve wheel are separately connected. The left/right-righting telescopic arm guide mechanism includes a left/right-righting telescopic arm guide wheel or a left/right-righting telescopic arm guide piece. The up/down support telescopic arm guide wheel is arranged on the telescopic arm bracket or the rolling friction telescopic arm.

Disclosed is a low-thickness rolling guide telescopic rocker arm, which includes a telescopic arm bracket, a rolling friction telescopic arm, an up/down-rolling support telescopic arm guide mechanism, and a left/right-righting telescopic arm guide mechanism. The up/down-rolling support telescopic arm guide mechanism includes an up/down support telescopic arm guide wheel or an up/down support telescopic arm guide piece. The up/down support telescopic arm guide wheel includes an up/down support guide axle and an up/down support sleeve wheel. The up/down support guide axle and the up/down support sleeve wheel are separately connected. The left/right-righting telescopic arm guide mechanism includes a left/right-righting telescopic arm guide wheel or a left/right-righting telescopic arm guide piece. The up/down support telescopic arm guide wheel is arranged on the telescopic arm bracket or the rolling friction telescopic arm.