| Patents for F04D 1 - Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (3,447) |
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| 10/17/1978 | US4120606 Submersible motor pump |
| 10/03/1978 | CA1039575A1 Centrifugal pump |
| 10/03/1978 | CA1039573A1 Cooling water pump, preferably for motor car engines |
| 09/26/1978 | US4116583 Multi-purpose end casings for ring type multi-stage centrifugal pumps |
| 09/12/1978 | US4113089 Support fixtures for preassembled unit or cartridge for multi-stage barrel type centrifugal pumps |
| 09/05/1978 | US4111597 Centrifugal pump with centripetal inducer |
| 08/29/1978 | US4110059 Pumping device |
| 07/18/1978 | US4101243 Centrifugal two-stage pump |
| 07/04/1978 | US4098558 Preassembled unit or cartridge for multi-stage barrel type centrifugal pumps |
| 06/27/1978 | US4097186 Multi-stage ring type centrifugal pumps with inducer means |
| 06/13/1978 | US4094613 Variable output centrifugal pump |
| 03/21/1978 | US4080112 Magnetically-coupled pump |
| 02/28/1978 | US4076450 Double volute pump with replaceable lips |
| 02/14/1978 | US4073596 Lubricant cooling for high-speed pitot pump |
| 12/20/1977 | US4063846 Pump impeller improvement |
| 11/22/1977 | US4059364 Pitot compressor with liquid separator |
| 10/11/1977 | US4053255 Self-adjusting spacer for centrifugal pumps |
| 09/27/1977 | US4050846 Fluid circulating apparatus |
| 08/30/1977 | US4045145 Pitot pump with turbulence elimination |
| 08/30/1977 | US4044943 Centrifugal separator and system |
| 07/19/1977 | US4036427 Combination pitot pump and centrifugal separator |
| 06/28/1977 | US4032256 Centrifugal pump |
| 05/24/1977 | US4025225 Disc pump or turbine |
| 03/29/1977 | US4014626 Centrifugal pump means |
| 01/25/1977 | US4004541 Jet boat pump |
| 12/28/1976 | US3999881 Centrifugal pump of the pitot type |
| 11/30/1976 | US3994618 Or pressures |
| 11/16/1976 | US3991564 Dual pressure level oil supply system |
| 08/31/1976 | US3977810 Multiple outlet, constant flow, pitot pump |
| 08/24/1976 | US3976395 Multiple-stage centrifugal compressor |
| 08/17/1976 | US3975117 Pump and motor unit with inducer at one end and centrifugal impeller at opposite end of the motor |
| 08/17/1976 | US3975113 Centrifugal pump |
| 08/10/1976 | US3973871 Sump pump |
| 08/10/1976 | US3973403 Closed cycle steam turbine system with liquid vortex pump |
| 07/20/1976 | US3970408 Apparatus for use with delicate fluids |
| 06/22/1976 | US3964662 Sealing apparatus |
| 06/15/1976 | US3963371 Multi-stage pump |
| 06/08/1976 | US3961859 Clutch connected multi-stage impeller pump |
| 06/01/1976 | US3960319 Centrifugal separator |
| 05/25/1976 | US3958895 Pump with shearing means |
| 04/27/1976 | US3953150 Impeller apparatus |
| 03/30/1976 | US3947530 Self-priming centrifugal pump |
| 03/23/1976 | USRE28742 Pumps capable of use as heart pumps |
| 03/23/1976 | US3945756 Centrifugal pumping system |
| 02/17/1976 | US3938398 Torque-transmitting devices |
| 02/03/1976 | US3936214 Pumping two-phase fluids |
| 02/03/1976 | US3935833 Jet boat pump |