1,210,435. Centrifugal pumps. GRUNDFOS A.S. March 8, 1968 [March 9, 1967], No. 10845/68. Heading F1C. The casing 9 of a submersible centrifugal pump is connected to the driving motor 10 by a connecting member which also houses a filter and comprises two end walls 1, 2 of drawn sheet material and shell elements 4 also of drawn sheet material welded to the end walls to form a cylindrical outer wall, water flow openings 5, 6' being provided in the connecting member, and a cup-shaped filter body 7 being arranged at a substantial distance from the outer wall. The sheet material is preferably stainless steel. The connecting member is secured to the motor 10 by screws 12 passing through holes 13 in the end wall 2, and is secured to the pump by bands 22 welded to bolts 21 passing through holes 20 in segmental plates 15 which abut inwardly bent flanges 17 provided on the shell elements 4. The bands 22 also serve to hold together the sections of the pump casing 9. Flanges 8 on the filter body 7 are clamped between the end wall 1 and the pump casing 9 to hold the filter body in place.