Patent ID: 6447216
Filing Date: 2002-09-10
Classification: B05B,F04B

Abstract:
A fluid pumping assembly for particulate material comprising:(a) a pump housing defining a pump cavity including a pumping chamber for handling particulate material, a motive fluid chamber, and a moveable diaphragm between said pumping chamber and said motive fluid chamber; (b) a first means for loading particulate material into said pumping chamber; (c) a second means for injecting a high pressure, high volume purging fluid into said pumping chamber; (d) a third means including a pilot fluid connected to said second means; and (e) a control valve connected (i) to said second means and (ii) to said third means, for turning off said second means and said third means when said first means is loading particulate material into said pumping chamber, thus enabling particulate material to be loaded in a dense phase into said pumping chamber, and thereby optimizing a particulate material moving capacity of the fluid pumping assembly.