Vacuum unit and truck with air and water

A vacuum unit for excavating material, the vacuum unit comprising:

• a vacuum system;
• a compressed air system;
• a water system;
• and
• an air and water nozzle configured to be hand guided by an operator of the vacuum unit while excavating the material, the air and water nozzle comprising:
• a body that is hand held by the operator while excavating the material;
• an air passageway through the body wherein compressed air passes through the air passageway when being used to break up the material that is picked up by the vacuum system;
• a water passageway through the body wherein excavation water from the water system passes through the water passageway when the excavation water is being used to break up the material that is picked up by the vacuum system;
• an air valve wherein the compressed air passes through the air valve when the compressed air is being used to break up the material that is picked up by the vacuum system;
• a water valve wherein the excavation water passes through the water valve when the excavation water is being used to break up the material that is picked up by the vacuum system;
• an air control configured to be operated by the operator while hand guiding the air and water nozzle and while breaking up the material that is picked up by the vacuum system, wherein the air control opens and closes the air valve;
• and
• a water control configured to be operated by the operator while hand guiding the air and water nozzle and while breaking up the material that is picked up by the vacuum system, wherein the water control opens and closes the water valve;
• wherein the body of the air and water nozzle comprises an inner tube and an outer tube, and wherein the air and water nozzle further comprises a first exit orifice extending to the inner tube and at least one second exit orifice extending to an interstitial space between the inner tube and the outer tube.

A vacuum unit for excavating material, the vacuum unit comprising:

• a vacuum system that picks up the material, the vacuum system comprising a debris tank that holds the material once excavated, a blower that draws air out of the debris tank to create vacuum, and a vacuum conduit that extends from the debris tank to an excavation site where the material is excavated;
• a compressed air system that breaks up the material that is picked up by the vacuum system, the compressed air system comprising at least one of an air receiver that stores compressed air or an air compressor that compresses air, the compressed air system further comprising a compressed air conduit that extends from the air receiver or the compressor to the excavation site;
• a water system that breaks up the material that is picked up by the vacuum system, the water system comprising a water tank that stores excavation water used in the water system and a water conduit that extends from the water pump to the excavation site;
• and
• an air and water nozzle configured to be hand guided at the excavation site by an operator of the vacuum unit while excavating the material, wherein the air and water nozzle is configured so that the operator, while hand guiding the air and water nozzle at the excavation site and while breaking up the material that is picked up by the vacuum system, can select between breaking up the material with the compressed air only, breaking up the material with the excavation water only, and breaking up the material with both compressed air and excavation water;
• wherein the body of the air and water nozzle comprises a first tube and a second tube, and wherein the air and water nozzle further comprises a first exit orifice extending to a first space inside the first tube and at least one second exit orifice extending to a second space inside the second tube.