The invention relates to a material collection container of a suction excavator, having a suction connection at its rear end-face wall and a suction flow duct that leads from the suction connection through a collection chamber and a filter unit. The suction connection is positioned at the rear end-face wall in such a way that its cross section is intersected by the plane of symmetry of the material collection container. After passing through the collection chamber, the suction flow is divided into at least two subflows that are conducted in air ducts situated on both sides of the plane of symmetry.

The invention further relates to a suction excavator having this type of material collection container.

Systems for reducing or preventing pluggage of spoil material in an excavation vacuum apparatus wherein the pluggage prevention system of the excavation vacuum apparatus may trigger one or more mitigation operations (e.g., addition of water through spray nozzles) to loosen the build-up of spoil material and/or to at least partially shut down the excavation vacuum apparatus to prevent more material being fed to the system.

Systems for reducing or preventing pluggage of spoil material in an excavation vacuum apparatus wherein the pluggage prevention system of the excavation vacuum apparatus may trigger one or more mitigation operations (e.g., addition of water through spray nozzles) to loosen the build-up of spoil material and/or to at least partially shut down the excavation vacuum apparatus to prevent more material being fed to the system.

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 liquid pump includes an inner and an outer tube. The inner tube can have a distal end that is position within interior volume of the outer tube. A conical filter is on the distal end of the inner tube. A gas pump provides compressed air which is output through a plurality of inner tube holes on an inner surface of the inner tube on a distal portion of the inner tube and a plurality of annular space holes which are adjacent to an annular space between the inner tube and the outer tube.

The liquid pump includes an inner and an outer tube. The inner tube can have a distal end that is position within interior volume of the outer tube. A conical filter is on the distal end of the inner tube. A gas pump provides compressed air which is output through a plurality of inner tube holes on an inner surface of the inner tube on a distal portion of the inner tube and a plurality of annular space holes which are adjacent to an annular space between the inner tube and the outer tube.

A bi-directional sled includes a support structure and a shroud assembly. The shroud assembly is supported to the support structure for pivotal movement about an axis extending through the support structure between a first orientation and a second orientation. The shroud assembly has a shroud with a first edge and a second edge opposite the first edge. With the support structure moving the shroud assembly in the first direction relative to material to be dredged friction between the shroud assembly and material to be dredged pivots the shroud and the first edge into a first orientation to contact material to be dredged. With the support structure moving the shroud assembly in the second direction relative to material to be dredged the shroud and second edge are pivoted into a second orientation to contact material to be dredged.

A bi-directional sled includes a support structure and a shroud assembly. The shroud assembly is supported to the support structure for pivotal movement about an axis extending through the support structure between a first orientation and a second orientation. The shroud assembly has a shroud with a first edge and a second edge opposite the first edge. With the support structure moving the shroud assembly in the first direction relative to material to be dredged friction between the shroud assembly and material to be dredged pivots the shroud and the first edge into a first orientation to contact material to be dredged. With the support structure moving the shroud assembly in the second direction relative to material to be dredged the shroud and second edge are pivoted into a second orientation to contact material to be dredged.