| Patents for F04D 23 - Other rotary non-positive-displacement pumps specially adapted for elastic fluids (928) |
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| 05/27/1980 | US4204802 Side channel compressor |
| 05/27/1980 | US4204800 Multistage side channel compressor |
| 05/15/1980 | WO1980000988A1 A wear-resisting attachment for protection of metallic members against erosion from airborne abrasive particles,and a fan blade provided with such an attachment |
| 04/08/1980 | US4197051 Energy transfer machine |
| 03/25/1980 | US4194798 Side channel compressor with at least one bearing arranged at the housing cover of the side channel compressor |
| 03/20/1979 | US4144721 Rotary thermodynamic apparatus |
| 02/27/1979 | US4141674 Impeller for a ring compressor |
| 01/30/1979 | US4136530 Rotary thermodynamic apparatus and method |
| 10/24/1978 | US4121435 Rotary thermodynamic apparatus |
| 10/03/1978 | US4117695 Thermodynamic method and device for carrying out the method |
| 08/22/1978 | US4107935 High temperature refrigerator |
| 07/18/1978 | US4100765 Rotary thermodynamic apparatus |
| 06/13/1978 | US4094170 Rotary thermodynamic apparatus |
| 07/12/1977 | US4034870 Device for introducing a substance, particularly a pulverulent substance, from a chamber having a pressure P1, into a chamber having a pressure P2 higher than P1 |
| 06/07/1977 | US4028008 Solar energy operated air compressor |
| 03/01/1977 | US4010018 Refrigerator |
| 02/08/1977 | US4006998 Ring compressor |
| 01/11/1977 | US4002414 Compressor-expander rotor as employed with an integral turbo-compressor wave engine |
| 11/02/1976 | US3989411 Silencing vane for toroidal blower |
| 09/28/1976 | US3982848 Side channel ring compressor including a channel break decompression nozzle |
| 09/21/1976 | US3981627 Rotary thermodynamic compressor |
| 08/31/1976 | US3977811 Air pump for use in dusty environment |
| 08/10/1976 | US3973865 Side-channel ring compressor |
| 06/29/1976 | US3966511 Process for the manufacture of anti-abradant elements |
| 06/22/1976 | US3964888 Vacuum sweeper |
| 04/20/1976 | US3951567 Side channel compressor |
| 03/09/1976 | US3942906 Side channel ring compressor |
| 02/03/1976 | US3936240 Centrifugal-vortex pump |