The invention relates to a device (10) for dredging a watercourse or body of water, the device includes a watercraft (105) which supports a grinder, the grinder (110) for grinding plants found in the watercourse or body of water comprising an inlet (115) for plants and an outlet (120) for ground plants, and a floating receptacle (125) which is connected to the outlet of the grinder in order to collect the scraps of ground plants.

The Row Digger provides a tool that enables an operator of the Row Digger to remove dirt piles interfering with irrigation between crop field furrows and irrigation trenches. The Row Digger includes a frame capable of moving from a transportation position to an operation position. The Row Digger also includes a plurality of digger arms extending from a central hub and each terminating in a corresponding digging disc. The central hub is connected to the frame at a hub angle and is capable of rotation about a hub axis. Each digging disc is also connected to the corresponding digger arm at a disc angle. Each digging disc enters a crop furrow and utilizes the slopes of the ridges to create the rotation required about the hub axis and ensure a path of travel for the digging discs that removes the impeding dirt piles.

The Row Digger provides a tool that enables an operator of the Row Digger to remove dirt piles interfering with irrigation between crop field furrows and irrigation trenches. The Row Digger includes a frame capable of moving from a transportation position to an operation position. The Row Digger also includes a plurality of digger arms extending from a central hub and each terminating in a corresponding digging disc. The central hub is connected to the frame at a hub angle and is capable of rotation about a hub axis. Each digging disc is also connected to the corresponding digger arm at a disc angle. Each digging disc enters a crop furrow and utilizes the slopes of the ridges to create the rotation required about the hub axis and ensure a path of travel for the digging discs that removes the impeding dirt piles.

Apparatuses that include a nozzle, vacuum units, and vacuum trucks for excavating material, for instance, around buried utility lines. Multiple embodiments include an (e.g., air and water) nozzle, for instance, that breaks up material (e.g., earth) that is picked up with vacuum. Various embodiments include vacuum, compressed air, and water systems. Various nozzles include two passageways or tubes (e.g., one inside the other), exit orifices (e.g., from each passageway), or a combination thereof. Tubes may be concentric or a passageway may be between inner and outer tubes. Nozzles may be configured to be hand guided by an operator while excavating the material. Embodiments may include air and water valves, controls, or both.

A system and method of off shore mining for retrieval and extraction of heavy mineral concentrate from placer deposits or other suitable materials. The system comprises a dredge vessel and a barge, coupled in conjunction to the dredge vessel. The dredge vessel having thereon a dredging unit, at least one gravity separator and spiral separators for procurement of total heavy minerals from dredged sediment and debris. The barge is configured to acquire and process the total heavy minerals, wherein the barge has thereon at least one magnetic separator, electro-magnetic separators, and density separators for separation of desired minerals based on their physical properties. The system further comprises at least one discharge conduit for tailing of wastes, leftover after extraction and separation of desired minerals, back into water bodies.

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.

A dredging tube system includes a tube unit and a plurality of spaced-apart sediment-trapping units. The tube unit includes a tube structure that has an inner surrounding surface surrounding a longitudinal axis. The sediment-trapping units are mounted fixedly on the inner surrounding surface and are arranged along the longitudinal axis. Each of the sediment-trapping units includes a plurality of sediment-trapping members that cooperatively form an annular ring structure. Each of the sediment-trapping members has an abutment portion that has a curved outer surface entirely abutting against the inner surrounding surface of the tube structure, and a projecting portion that extends radially and inwardly from the abutment portion.

A curing system for Cured-In-Place-Pipe includes a generator, low pressure high volume blower, heater, upstream sensor and control system housed within a vehicle for mobilization from job site to job site. In use a technician inserts CIPP into a pipe requiring repair, and inputs project specifications such as diameter of CIPP, thickness of CIPP and length of host pipe into the curing system's control system. The technician connects the curing system to the upstream end of the CIPP and initiates the curing process, including the steps of evacuation of ambient air from lining system; pressurizing lining system; superheating lining system; evacuation of superheated air; and relieving pressure after liner has cooled down. During the process, an upstream sensor and a downstream sensor measure parameters such as pressure and temperature and send this data to a control system. The control system includes algorithms that guide the process by adjusting specific parameters such as flow rate, temperature, exhaust rate, and duration, based on upstream and downstream sensor data and differentials there between.

A push rack pipe pusher having a base. A first frame coupled to the base. A second frame coupled to the base. A first pressurized cylinder coupled to the base. A second pressurized cylinder coupled to the base. A third pressurized cylinder coupled to the base. A fourth pressurized cylinder coupled to the base. A lower track conveyer system coupled to the base and positioned between the first frame and the second frame. An upper track conveyer system coupled to the pressurized cylinders and positioned between the first frame and the second frame. A control unit coupled to the upper track conveyer system, the lower track conveyer system, and the pressurized cylinders.

Vacuum units and vacuum trucks, for example, for excavating material, for instance, around buried utility lines. Multiple embodiments include an air and water nozzle that provides air and water to break up material (e.g., earth) that is picked up by a vacuum system. Various embodiments include a vacuum system, a compressed air system, a water system, and an air and water nozzle configured to be hand guided by an operator while excavating the material. In a number of embodiments, the air and water nozzle can include a body that is hand held by the operator while excavating the material, an air passageway through the body, a water passageway through the body, an air valve, a water valve, an air control that opens and closes the air valve, and a water control that opens and closes the water valve.