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US 6,273,512 B1Granted
Hydrovac excavating blast wand
OwnerRobert C. Rajewskiinventor
Life of this patent
Estimating the term…
Abstract
A hydrovac wand is provided with a crossfire nozzle arrangement that reduces thrust to the wand operator, and that has a spray pattern that eliminates spray back. A pair of jets erode a hole while two other jets push the debris back to a suction hose. Two high pressure swivels are provided at the end of the wand to allow the wand to rotate in all directions without binding. Boom controls are placed on the wand to maximize digging rates.
Claims9
A hydrovac digging device in combination with a hydrovac truck having a boom and a water tank, the hydrovac digging device comprising:
- a hydrovac blast wand having a digging end and a control end;
- a nozzle arrangement at the digging end;
- a hose connected to the water tank of the hydrovac truck;
- connections at the control end of the hydrovac blast wand, the connections being connected to the hose for supplying fluid through the hydrovac blast wand to the nozzle arrangement;
- and
- boom controls on the hydrovac blast wand at the control end of the hydrovac blast wand.
3 more elements
Dependencies are inferred from the claim text.