Blow guns

A blow gun comprising a hollow body having an inlet for compressed air at one end of the body, a tube extending from the other end of the body, said tube having a closed end mounted to swivel in the body, and further having radial port leading from the interior to the exterior of the tube adjacent to the closed end of the tube, a cap carried by the closed end of the tube which is radially spaced from the periphery of the tube and shrouds said port, a seal in the body, surrounding the tube, on which the cap normally seats to prevent air from entering said port, but from which one side of the cap can be separated by swinging the tube out of axial alignment with the body to admit air to said port, wherein the improvement comprises a nozzle fixed on the outer end of the tube, said nozzle having a Venturi passage extending outward from the tube, the inner end of such passage being radially spaced from the tube and having ports arranged laterally of the tube which act as inlets when air is discharged through the nozzle and as outlets when the nozzle is obstructed, and a plurality of radial vanes on the periphery of the nozzle which extend from the inner ends of the lateral ports substantially beyond the outer ends thereof.