| 摘要 |
The centrifugal blaster comprises a rotatably supported blasting wheel having radially extending impeller blades adjacent the periphery of the wheel. The blades are relatively short and have their inner ends spaced a uniform distance short of the axis of the rotation of the wheel to define an abrasive supply space between the inner ends of the blades. A tube extends into the abrasive supply space for delivering abrasive onto the impeller blades and comprises a main passageway having an axis parallel to and spaced radially outwardly from the axis of rotation of the blasting wheel. A discharge extension on the inner end of the main portion extends radially outwardly and terminates in a discharge opening adjacent to and in a closely spaced relationship with the inner ends of the blades.
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