초록 ▼

A spray gun for cleaning using a dense fluid such as CO.sub.2, provides snow pellets of controllable size and kinetic energy, the kinetic energy being at a significantly higher level than has heretofore been attainable. A heated or thermal ionized gas is passed at substantial pressure accelerates th

A spray gun for cleaning using a dense fluid such as CO.sub.2, provides snow pellets of controllable size and kinetic energy, the kinetic energy being at a significantly higher level than has heretofore been attainable. A heated or thermal ionized gas is passed at substantial pressure accelerates the snow particles with an enveloping stream of gas. Charge build-up both within the snow delivery tube and in the substrate region is minimized by the use of a grounding helix in the snow delivery tube, in conjunction with the thermal ionized gas.

대표청구항 ▼

[ What is claimed is:] [1.] A spray gun for spraying a particulate of a dense fluid comprising:a spray gun body having a central bore from a proximal to a distal end along a central axis, and including a gas passageway radially spaced from the central bore;a nozzle coupled to the distal end of the s

[ What is claimed is:] [1.] A spray gun for spraying a particulate of a dense fluid comprising:a spray gun body having a central bore from a proximal to a distal end along a central axis, and including a gas passageway radially spaced from the central bore;a nozzle coupled to the distal end of the spray gun body, the nozzle having converging walls and a distal end orifice;a snow delivery tube mounted within the central bore of the spray gun body;a grounding helix about the snow delivery tube;means for supplying a heated ionized gas to the gas passageway; andmeans for supplying an expanded dense fluid particulate stream through the snow delivery tube.