| 摘要 |
Sandblasting machine which includes a container for the sand, the bottom end of which is in communication with a sand flow-regulating valve, in turn communicating with a mixing chamber for the compressed air and sand. The outlet of said mixing chamber consists of the inner end of a hose serving to feed the air-sand mixture to the sandblasting nozzle. This inner end of the hose forms a valve seat, which, in conjunction with a ball member, forms a shut-off valve for the sand and air mixture. This shut-off valve is operated by a pneumatic cylinder remotely controlled at the sandblasting nozzle. The inner end of the hose may easily be periodically cut when the abrasive action of the sand wears it out.
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