Sandblast Abrading Apparatus

Author:  Merrigan, James P.
Source:  US Patent 4,067,150
Doc ID:  1978012
Year of Publication:  1978
Abstract:  
Air from a source of pressurized air, acting through a ball-type vibrator and a resilient mounting, serves to form a cloud of abrasive material within a reservoir of such material. Air from the same source serves to aspirate a continuous charge of the cloud of material and to discharge it from a nozzle.