F04C 21 - Oscillating-piston pumps specially adapted for elastic fluids

Patents for F04C 21 - Oscillating-piston pumps specially adapted for elastic fluids (244)
08/1993
08/31/1993	US5240388 Scroll type compressor with variable displacement mechanism
04/1993
04/20/1993	US5203684 Oscillating piston pump or similar machine
01/1993
01/13/1993	EP0522531A1 Rotary compressor
10/1992
10/28/1992	EP0510402A2 Orbiting rotary compressor
09/1992
09/30/1992	CN2117480U Oscillating rotary machine for converting mechanical energy into pressure
09/16/1992	EP0503629A1 Scroll type compressor with variable displacement mechanism
09/16/1992	CA2063148A1 Scroll type compressor with variable displacement mechanism
09/15/1992	US5147193 Power conversion machine with pistons rotating in pairs relative to each other in a spherical housing
07/1992
07/29/1992	EP0395710B1 Valve arrangement for pump or compressor
04/1992
04/15/1992	CN1016261B Waveform actuating air compressor
04/01/1992	EP0478378A2 Check valve for compressor
02/1992
02/18/1992	US5088905 Check valve for scroll compressor
02/11/1992	US5086767 Ventilator for assisting the breathing of a patient
11/1991
11/27/1991	CN1014921B Power conversion machine provided with pistons rotating in spherical housing
11/21/1991	EP0456713A1 Arrangement of pumps or similar machines.
10/1991
10/30/1991	CN2087704U Vane-type swaying motor
10/01/1991	US5053655 Motor-compressor unit
07/1991
07/17/1991	EP0436999A1 Motor-compressor unit
05/1991
05/21/1991	US5017106 Pump for conveying gases and providing a differential pressure
04/1991
04/02/1991	CA1282386C Scroll type compressor with displacement adjusting mechanism
11/1990
11/07/1990	EP0395710A1 Valve arrangement for pump or compressor.
10/1990
10/31/1990	EP0394720A1 Pump for displacement of gases and for generation of differential pressure
08/1990
08/08/1990	EP0381639A2 Power conversion machine provided with pistons rotating in a spherical housing
08/04/1990	WO1990008902A1 Arrangement of pumps or similar machines
08/04/1990	CA2045558A1 Arrangement of pumps or similar machines
07/1990
07/25/1990	CN1044149A Power conversion machine provided with pistons rotating in spherical housing
07/10/1990	WO1990007632A1 Power conversion machine with pistons rotating in pairs relative to each other in a spherical housing
04/1990
04/24/1990	US4919601 Waveform actuating air compressor
10/1989
10/25/1989	CN1036620A Waveform actuating air compressor
08/1989
08/29/1989	US4861236 Birotational pump
06/1989
06/29/1989	WO1989005918A1 Valve arrangement for pump or compressor
11/1988
11/02/1988	CN87101507A Conical ring plate rotating piston pump
02/1988
02/10/1988	CN86209456U Cylinder for exhaust-enhanced swinging air-compressor without oil
08/1987
08/05/1987	CN86100672A High-pressure horizontal continuous casting and its equipment
02/1987
02/10/1987	US4642034 Scroll type compressor with displacement adjusting mechanism
06/1985
06/12/1985	EP0144169A2 Scroll type compressor with displacement adjusting mechanism
09/1984
09/18/1984	US4472114 Electric compressor
10/1982
10/05/1982	CA1132952A1 Pivotal piston machine
06/1981
06/09/1981	US4272229 Pivotal piston machine
04/1981
04/28/1981	CA1099989A1 Angular compression expansion cylinder with radial pistons
12/1979
12/25/1979	CA1068543A Meat pump with rotary actuator
03/1978
03/21/1978	US4080114 Oscillating positive displacement machine
11/1976
11/02/1976	US3989421 Housing construction for slant axis rotary mechanism
03/1976
03/30/1976	US3946617 Motion translation mechanism

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