Particle Supply Valve For Use In Blasting Apparatus

Author:  Naoyoshi Tomioka, Tokyo, Japan
Source:  US Patent 5,897,427
Doc ID:  1999120
Year of Publication:  1999
Abstract:  
A blasting apparatus has two or more pressured tanks and a switching member for selecting one of the pressured tanks from which particles are to be fed to an ejection portion, thereby which enabling a continuous blasting operation. The blasting apparatus has a particle supply valve which uses a valve rod and piston arrangement for preventing leakage of particles. Such a valve arrangement enables airtightness to be retained within pressurized chambers of the valve housing for a long period of time.