Systems and methods for a vacuum excavator to prevent to formation of blockages know as spoil bridges are provided. The vacuum excavator includes a high vacuum blower that is coupled through a multi-stage airflow system that has a debris tank to which an excavation hose is coupled. A knuckle boom having two arm segments includes actuators to angularly position the arm segments, and hose roller assemblies that carry the excavation hose. The systems and methods control the angular position of the arm segments to control the flow curvature of the excavation hose from an excavation site to the debris tank in order to eliminate or reduce the occurrences of spoil bridges therein.

Systems and methods for a vacuum excavator to prevent to formation of blockages know as spoil bridges are provided. The vacuum excavator includes a high vacuum blower that is coupled through a multi-stage airflow system that has a debris tank to which an excavation hose is coupled. A knuckle boom having two arm segments includes actuators to angularly position the arm segments, and hose roller assemblies that carry the excavation hose. The systems and methods control the angular position of the arm segments to control the flow curvature of the excavation hose from an excavation site to the debris tank in order to eliminate or reduce the occurrences of spoil bridges therein.

Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

The hydro excavation remote dig system provides for a primary and secondary dig tube attachments that permit a vacuum truck to be used for a remote dig setup. Specifically, the attachments include various attachable handles, corrugated tubing that connects to a reinforcement bar device with releasable clamps to maintain the corrugated tubing in an elongated state during use, a debris box with an integrated safety valve, and a dig tip.

Disclosed is an apparatus for screening material at the end of an excavator arm comprising a blade having a bottom edge, a top edge and a connector therebetween for securing to a distal end of the arm of a earth moving equipment. The bucket has a bottom screen having front and rear edges being rotatable about the top edge of the blade section. The bottom screen is positionable so as to extend angled away from the bottom edge of the blade. The bucket further comprises a front screen rotatable relative to the bottom screen having a main portion and an angled bottom portion. The front screen is positionable to a closed position proximate the front edge of the bottom screen such that the front edge of the bottom screen extends past the angled bottom portion of the front screen.

A robot and a collecting method for collecting polymetallic nodules in deep-sea are provided. The robot includes an underwater moving carrier and a collecting module, and the collecting module is fixedly mounted on the underwater moving carrier. The collecting module includes a collecting frame, a collecting pump, a rack and a collecting tube, the collecting frame is installed at the bottom of the rack, and the collecting pump is a piston pump, which includes a piston and a cylinder with open lower-end. The upper part of the cylinder is a collecting area, the lower part is a piston stroke area, the collecting tube is connected to the cylinder of the collecting area, and a check valve is arranged in the middle of the piston.

A robot and a collecting method for collecting polymetallic nodules in deep-sea are provided. The robot includes an underwater moving carrier and a collecting module, and the collecting module is fixedly mounted on the underwater moving carrier. The collecting module includes a collecting frame, a collecting pump, a rack and a collecting tube, the collecting frame is installed at the bottom of the rack, and the collecting pump is a piston pump, which includes a piston and a cylinder with open lower-end. The upper part of the cylinder is a collecting area, the lower part is a piston stroke area, the collecting tube is connected to the cylinder of the collecting area, and a check valve is arranged in the middle of the piston.