Abrasive Particle Blast Apparatus for Surface Treatment

Author:  Harvey G. Van Fossen
Source:  US Patent 4,202,142
Doc ID:  1978051
Year of Publication:  1978
Abstract:  
Recovery and feed system for abrasive blast in surface treatment comprising treatment and return by air to separate spent abrasive particles from dust and dirt and collecting the separated abrasive particles in a chamber, automatically withdrawing fresh abrasive particles from a storage bin when the recycle falls below a predtermined level in the chamber.