| abstract |
A VACUUM PICKUP APPARATUS IN WHICH A STREAM OF AIR AND ENTRAINED MATERIAL FLOWING INTO AN EXPANSION AND MATERIAL COLLECTION CHAMBER STRIKES A CONCAVE SURFACE FLOW OBSTRUCTION AND IS DIVIDED INTO TWO PORTIONS DIRECTED ON OPPOSITELY TURNING COURSES OF FLOW FOR DISSIPATION OF THE KINETIC ENERGY OF THE INFLOWNG AIR AND ENTRAINED MATERIAL BY IMPINGEMENT OF THE PORTIONS FIRST AGAINST THE OBSTRUCTION AND THEN AGAINST EACH OTHER WITHIN THE CHAMBER. THE CAPACITY OF THE MATERIAL COLLECTION CHAMBER MAY BE VARIED BY SELECTIVE ARRANGEMENT AND INTERCONNECTION OF THREE HOUSING MEMBERS INCLUDED IN THE VACUUM PICKUP APPARATUS. |