Patent ID: 6851623

Claim:
A water spray nozzle ring assembly for use in the application of spay-on fireproofing material upon a surface, the assembly comprising: a nozzle ring comprising a plurality of recesses for accepting a plurality of nozzle tips; a plurality of a first type of nozzle tips from which water emanates at a first pressure, the first type of nozzle tips being arranged about the face of the nozzle ring so that water emanating therefrom contacts the fireproofing material at a first distance from the nozzle ring, wherein the first type of nozzle tips provides a first water spray pattern for at least essentially uniformly mixing water and the fireproofing material; and a plurality of a second type of nozzle tips from which water is emanates at a pressure greater than the first pressure, the second type of nozzle tips being arranged about the face or the nozzle ring so that water emanating therefrom contacts the fireproofing material at a second distance greater than the first distance, wherein the second type of nozzle tips provides a second water spray pattern different from the first water spray pattern that provides additional impact pressure of the fireproofing material against the surface; wherein the second water spray pattern at the higher water pressure causes an increase in concentration of fireproofing material at the second distance over the concentration or fireproofing material existing at the first distance.