Patent ID: 8171659

Claim:
A method of soil working performing one or more of soil fracture, soil excavation and soil treatment, said method comprising the steps of: Supplying a source of pressurized gas; Supplying a source of fluidized material; Positioning a tool, which is coupled to the source of pressurized gas and to the source of fluidized material and includes a distal end having a distal exit opening and a nozzle with a contraction portion and a throat, with the distal end thereof adjacent the soil; Directing a stream of the pressurized gas from the source of pressurized gas through the nozzle and through the distal exit opening of the tool at the soil being worked; and Entraining a stream of fluidized material from the source of fluidized material in the gas stream within the tool after the gas stream passes the throat of the nozzle and prior to the combined gas and fluidized material stream exiting the distal exit opening.