A cleaning system 210 having nozzle assembly 10 for a pressured
fluid
stream entrained with abrasive that includes a pressured fluid receiving portion
15 adapted to accommodate a pressured fluid dispenser 20. An abrasive
entrainment chamber 25 is oriented to accept pressured fluid jetted thereacross
from the pressured fluid dispenser. The abrasive entrainment chamber is adapted
to establish a venturi suction responsive to pressured fluid being jetted thereacross.
An access port 30 is provided in fluid communication with the abrasive entrainment
chamber for permitting suction of abrasive into the abrasive entrainment chamber
for entrainment in a pressured fluid being jetted thereacross. A spray enclosure
35 is positioned at the abrasive entrainment chamber and oriented to receive
pressured fluid dispensed from the pressured fluid dispenser at the pressured fluid
receiving portion. The spray enclosure is configured to substantially conform to
a spray pattern 40 of pressured fluid jetted from the pressured fluid dispenser
with minimized influence on the spray pattern at side-edge portions 45 thereof
for promoting substantially uniform dispersion of pressured fluid and abrasive
across the spray pattern.
