Patent ID: 8469295

Claim:
A method for dislodging and releasing particles of explosives or narcotics from a target surface, comprising: providing at least one nozzle, the nozzle including a first orifice for the emission of a first jet of pressurized gas directed towards said target surface and at least one second orifice for the emission of a second jet of pressurized gas directed towards said target surface, wherein a velocity of gas emitted by said second jet is equal to or greater than a velocity of gas emitted in said first jet; controlling at least one of: the first jet and the second jet using at least one controller, wherein controlling the at least one of: the first jet and the second jet includes emitting the pulse of said second jet at less than one second prior to the emission of the pulse from said first jet, and maintaining the pulse of said second jet during the pulse of said first jet, and wherein said velocity of said at least one second jet is controlled by the ratio of the cross section of the orifice of said at least one second jet compared to the cross section of the orifice of said first jet.