Abrading – Machine – Sandblast
Patent
1998-08-17
2000-10-17
Banks, Derris H.
Abrading
Machine
Sandblast
451354, B24C 306
Patent
active
061322962
ABSTRACT:
The machine consists of a blast housing, a reclaim duct, a reclaim hopper and a support framework. In use, the machine is supported on a horizontal surface over which it is driven and carries out a shot blasting or other operation on an adjacent vertical surface. The blast housing contains a centrifugal throwing wheel which is driven by an electric motor, whereby particulate material introduced into the cage is projected at high speed onto the surface. The reclaim duct receives particulate material, together with debris produced by the action of the material on the surface which rebounds from the surface, and feeds the debris and particulate material to the reclaim hopper. The central axis of the reclaim duct follows a three-dimensionally curved path which describes an upward turn through approximately 90.degree. and also an arc of about 145.degree. in an imaginary horizontal plane perpendicular to the vertical surface. The upper end of the reclaim duct is connected to the reclaim hopper. The particulate material which is returned to the hopper is separated from the debris from the surface by air wash, and returned to the throwing wheel.
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