公开(公告)号：EP2313660A1

公开(公告)日：2011-04-27

申请号：EP08756888.7

申请日：2008-06-04

申请人： Supavac Pty Ltd

发明人： KROHN, Mark

IPC分类号： F04F1/02 ,  B65G53/28 ,  F04F5/20 ,  B65G53/10 ,  B65G53/50 ,  F04F5/24 ,  B65G53/14 ,  B65G65/40

CPC分类号： F04F5/24 ,  F04F1/02 ,  F04F5/34

摘要： A pneumatic evacuation pump including: an inlet assembly (10) having an inlet valve (14) interposed between an inlet accepting material (13) from a material supply and a charging port (17) and selectively operable purge air injection means (20) located on the charging port side of said inlet valve; a chamber of selectable length (11 ) and substantially constant cross section and having a charge end opening to said charging port and a discharge end; and a delivery assembly (12) having a passage opening to said discharge end and extending to a delivery outlet, a delivery valve (24) interposed in said passage between said discharge end and said delivery outlet, a selectively operable, venturi vacuum source (31) opening to said passage between said discharge valve and said discharge end, and selectively operable exhaust air injection means (41) located downstream of said discharge valve and utilizing exhaust air from said venturi; a compressed air supply supplying said venturi and said purge air injection means; and control means acting to coordinate a' cycle of operation of said venturi vacuum source, said purge air injection means, said exhaust air injection means and said inlet and delivery valves.