Patent ID: 6083001
Filing Date: 2000-07-04
Classification: A61C,B24C

Abstract:
A particle feeding device comprising a container member adapted to hold abrasive particles, a mixing chamber in which a quantity of abrasive particles from said container member are combined with a carrier gas, anda substantially vibration-free pressure differential feed system that enables the delivery of a substantially linear flow of abrasive particles over a range of carrier gas pressures, said substantially vibration-free pressure differential system including a first valve disposed above the particle level in the mixing chamber and a second valve disposed beneath said mixing chamber wherein flow of abrasive particles is caused by a discontinuous gas pressure differential between the container member holding the abrasive particles and the mixing chamber,said device further including a control mechanism which controls the rapid opening and closing of at least one of said first and second valves to create said discontinuous gas pressure differential.