1/00 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) |
1/02 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) having non-centrifugal stages, e.g. centripetal |
1/04 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Helico-centrifugal pumps |
1/06 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Multi-stage pumps (F04D 1/02 takes precedence) |
1/08 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Multi-stage pumps (F04D 1/02 takes precedence) the stages being situated concentrically |
1/10 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Multi-stage pumps (F04D 1/02 takes precedence) with means for changing the flow-path through the stages, e.g. series/parallel |
1/12 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Pumps with scoops or like paring members protruding in the fluid circulating in a bowl |
1/14 | Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D 7/00; priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) Pumps raising fluids by centrifugal force within a conical rotary bowl with vertical axis |
3/00 | Axial-flow pumps (priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) |
3/02 | Axial-flow pumps (priming or boosting F04D 9/00; pumping liquids and elastic fluids at the same time F04D 31/00) of screw type |
5/00 | Pumps with circumferential or transverse flow (pumping liquids and elastic fluids at the same time F04D 31/00) |
7/00 | Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (pumping liquids and elastic fluids at the same time F04D 31/00) |
7/02 | Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (pumping liquids and elastic fluids at the same time F04D 31/00) of centrifugal type |
7/04 | Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (pumping liquids and elastic fluids at the same time F04D 31/00) of centrifugal type the fluids being viscous or non-homogeneous |
7/06 | Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (pumping liquids and elastic fluids at the same time F04D 31/00) of centrifugal type the fluids being hot or corrosive, e.g. liquid metal |
7/08 | Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts (pumping liquids and elastic fluids at the same time F04D 31/00) of centrifugal type the fluids being radioactive |
9/00 | Priming; Preventing vapour lock |
9/02 | Priming; Preventing vapour lock Self-priming pumps |
9/04 | Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour lock |
9/06 | Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour lock of jet type |