Patent ID: 6688947
Filing Date: 2004-02-10
Classification: B24C,Y10T

Abstract:
A method for reducing erosion on the inner wall of a nozzle for an abrasive fluid jet cutting system said erosion due to an abrasive slurry flowing from said nozzle's inlet port, along said nozzle's wall and exiting through said nozzle's outlet port, said method comprises the steps of:forming said nozzle so that at least a portion of it is porous, surrounding said porous portion of the outer wall of said nozzle with a lubricating fluid chamber, forcing lubricating fluid to pass from said lubricating chamber and through said porous wall to form a lubricating film between said nozzle inner wall and said flow of abrasive slurry, wherein said lubrication fluid having been filtered to eliminate contaminants from said lubricating fluid that might clog the pores of said porous portion of said nozzle.