Patent ID: 6332837
Filing Date: 2001-12-25
Classification: B08B

Abstract:
An apparatus for removing gases and particles comprisinga housing having a plurality of circumferentially disposed walls defining an open end for facing a workpiece;an energy reducing means in said housing for reducing the speed and energy of spark particles, said means including a first pyramid-shaped element disposed in said housing in spaced relation to said walls with a first open end facing said open end of said housing to receive a flow of material from the workpiece and a second open opposite end, and a second pyramid shaped element disposed in said housing with a closed apex end concentrically within said second open end of said first pyramid-shaped element to define a gap therebetween and to deflect the flow of material into said gap, said second pyramid shaped element being spaced from said walls of said housing; anda suction unit connected to said housing for withdrawing a flow of material from between said first pyramid shaped element and said housing walls.