Patent ID: 6910957

Claim:
An abrasive entraining assembly for a pressured fluid stream, said assembly comprising: a pressured fluid receiving portion adapted to accommodate a pressured fluid dispenser; an abrasive entrainment chamber oriented to accept pressured fluid jetted thereacross from the pressured fluid dispenser, said abrasive entrainment chamber adapted to establish a venturi suction responsive to pressured fluid being jetted thereacross; an access port in fluid communication between said abrasive entrainment chamber and an abrasive metering assembly, said access port adapted to permit suction of abrasive into said abrasive entrainment chamber for entrainment in a pressured fluid being jetted thereacross; said abrasive metering assembly comprising a ball valve positioned at a juncture between an air intake, an abrasive supply and said access port for controlling fluid communication therebetween; and a ball member of said ball valve being adapted to regulate an amount of abrasive permitted to be deployed from said abrasive supply into air taken up through said air intake, wherein said air intake further comprises a variably adjustable closure member adapted to increase and decrease air amounts permitted to be drawn through said air intake by rotation of said closure member.