| Patents for F04B 35 - Piston pumpsspecially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for (9,373) |
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| 01/07/1991 | CA2005807A1 Functionally modular brushless motor |
| 12/27/1990 | CA1278361C2 Low pressure metering fluid pump |
| 12/19/1990 | EP0402625A1 Drive for gas metering and mixing pump |
| 12/13/1990 | WO1990015201A1 Vacuum collecting vessel for flushing water |
| 12/13/1990 | WO1990015199A1 Pressure-generating hollow body |
| 12/04/1990 | US4974557 Auxiliary drive arrangement of an internal combustion engine for an air compressor |
| 12/04/1990 | CA1277360C Hold-down mechanism for a pivotally-mounted motor on an air compressor |
| 11/29/1990 | DE4015780A1 Compression control for electromagnetic reciprocating-piston pump |
| 11/29/1990 | DE4003988A1 Hermetically encapsulated electric compressor for refrigeration unit - has simplified bearing assembly for vertical shaft drive and flexibly mounted compressor block |
| 11/15/1990 | DE4021576A1 Jet engine for aircraft propulsion - has free piston air compressors arranged around combustion chamber and thrust nozzle |
| 11/13/1990 | US4969807 Gas compressor with buffer spaces |
| 11/01/1990 | WO1990013170A1 Electromagnetic drive system |
| 11/01/1990 | WO1990012961A1 Stirling cycle machine and compressor for use therein |
| 10/30/1990 | US4966533 Vacuum pump with rotational sliding piston support |
| 10/23/1990 | US4964785 Pump assembly |
| 10/18/1990 | DE4010938A1 Pressure supply to vehicle servo system - makes use of combustion gas from Diesel engine |
| 10/10/1990 | CN2063583U Series wl vertical short-run vacuum pump |
| 10/10/1990 | CN1009984B Power supply controler for oscillating motor for driving compressor unit |
| 09/26/1990 | CN1045633A Selaed air-compressor with spacer layer |
| 09/12/1990 | CN2061980U Coal mine shifting type air compressor |
| 09/04/1990 | US4954053 Free-piston compressor with gas spring control |
| 08/08/1990 | EP0381034A1 Variable positive fluid displacement apparatus with movable chambers |
| 08/08/1990 | EP0380600A1 A work generating device driven by an electric motor |
| 08/03/1990 | CA2004785A1 Variable positive fluid displacement apparatus with movable chambers |
| 08/02/1990 | DE3900636A1 Device for obtaining useful energy from potential energy |
| 07/26/1990 | WO1990008259A1 Installation for extracting usable energy from potential energy |
| 07/26/1990 | DE3901588A1 Vertically arranged rotor/crankshaft combination for a hermetic refrigerant compressor |
| 07/25/1990 | EP0378656A1 Pressure actuated movable head for a resonant reciprocating compressor balance chamber |
| 07/11/1990 | CN1008760B Hermetically sealed rotary compressor |
| 07/04/1990 | CN1043542A Sealed compressor |
| 06/13/1990 | DE3905383A1 Internal combustion engine |
| 05/23/1990 | CN2057469U Air-compressor set |
| 05/16/1990 | EP0367846A1 Pump set |
| 05/15/1990 | US4924675 Linear motor compresser with stationary piston |
| 05/09/1990 | EP0244435B1 Multiple energy generator with integrated thermal cycle |
| 04/25/1990 | CN2056454U Full seal compressor with silencing of noise and saving energy |
| 04/18/1990 | EP0364026A1 Motor-compressor unit |
| 03/21/1990 | CN2054842U Radiation type multi-shaft rotor compressor |
| 03/13/1990 | US4907950 Variable positive fluid displacement system |
| 03/07/1990 | EP0356990A2 Variable positive fluid displacement system |
| 02/21/1990 | CN2053256U Reciprocating compressor with magnet |
| 01/31/1990 | CN2052107U Gas pressurizer |
| 01/31/1990 | CN2052063U Magnetically-driven compressor |
| 01/10/1990 | CN1038687A Portable compressor kit with detachable lamp |
| 01/03/1990 | CN2050484U 微型空气压缩机 Mini air compressor |
| 01/02/1990 | US4890589 Variable capacity type reciprocating piston device |
| 12/28/1989 | WO1989012749A1 Pressure actuated movable head for a resonant reciprocating compressor balance chamber |
| 12/20/1989 | CN1006172B Electro-magnetic repulsive-atractive compression engine |
| 11/30/1989 | WO1989011750A1 A work generating device driven by an electric motor |
| 11/08/1989 | EP0340214A1 Bounce chambers for multi-cylinder linear engine compressors |
| 11/01/1989 | CN2046939U Movable air compression station |
| 10/17/1989 | US4874296 Compressor attachment for portable drill |
| 10/10/1989 | US4872313 Gas cycle machine |
| 09/19/1989 | US4867656 Free piston for use in an electromagnetic reciprocating compressor |
| 09/07/1989 | DE3806289A1 Compressor plant |
| 09/05/1989 | US4863593 Battery powered vacuum unit |
| 08/30/1989 | CN2043677U Domestic pump-type air extractor |
| 08/22/1989 | US4859156 Coupling mechanism for a compressor |
| 08/16/1989 | CN2042899U Grankless double-piston compressor |
| 08/09/1989 | CN2042521U Air-source for air-cushion experiment |
| 08/08/1989 | US4854833 Electromagnetically reciprocating apparatus with adjustable bounce chamber |
| 08/08/1989 | US4854829 Structure for motor-compressor units used with refrigerant fluids |
| 07/26/1989 | CN2041733U Endless transistor oil pump |
| 07/12/1989 | CN1004765B Self pumping valve inside |
| 06/21/1989 | EP0320579A1 Air compressor apparatus |
| 06/15/1989 | WO1989003480A3 Linear motor compressor with stationary piston |
| 06/15/1989 | DE3740767A1 Hermetically encapsulated refrigerating compressor |
| 06/14/1989 | EP0320415A1 Electric motor compressor unit |
| 06/14/1989 | CN1004505B Motor power of compressor independent of piston stroke |
| 06/13/1989 | US4838771 Biasing force adjusting apparatus for electromagnetically driven reciprocating pump |
| 06/13/1989 | US4838343 Portable apparatus for cooling compressed air |
| 06/06/1989 | US4836757 Pressure actuated movable head for a resonant reciprocating compressor balance chamber |
| 06/06/1989 | US4836755 Compressor with balanced flywheel |
| 05/30/1989 | US4834626 Perfected portable motor-driven compressor set |
| 05/23/1989 | US4832578 Multi-stage compressor |
| 05/17/1989 | EP0315721A1 Internal combustion driven air compressor |
| 05/16/1989 | US4830579 Portable compressor kit with detachable lamp |
| 04/20/1989 | WO1989003481A1 Linear drive motor with improved dynamic absorber |
| 04/20/1989 | WO1989003480A2 Linear motor compressor with stationary piston |
| 04/18/1989 | US4822390 Closed cycle gas refrigerator |
| 04/12/1989 | CN2035809U Overall-covering low-noise air compressor |
| 04/11/1989 | US4819439 Cryogenic refrigerator |
| 03/22/1989 | EP0308262A2 Variable capacity type reciprocating piston device |
| 03/14/1989 | US4811558 Gas recovery system |
| 03/08/1989 | EP0305490A1 Stabilizing means for free piston-type linear resonant reciprocating machines |
| 03/07/1989 | US4810915 Motor-compressor |
| 02/08/1989 | CN2032264U Electromagnetic reciprocating refrigerating compressor |
| 01/25/1989 | CN2031454U Binding magnetism-driven pump. |
| 01/24/1989 | US4799421 Hydrodynamic spiral-grooved journal bearing for electromagnetically rotated and reciprocated compressor piston |
| 01/17/1989 | CA1248769A1 Linear motor compressor with clearance seals and gas bearings |
| 01/12/1989 | WO1989000245A1 Bounce chambers for multi-cylinder linear engine compressors |
| 01/03/1989 | CA1247873A1 Linear motor compressor with pressure stabilization ports for use in refrigeration systems |
| 12/06/1988 | US4789310 Multi-function implement for illumination and air-supply |
| 11/22/1988 | CA1245199A1 Bearing construction for refrigeration compressor |
| 11/17/1988 | EP0291466A2 Motor compressor unit for refrigerants |
| 11/15/1988 | US4783968 Suspension system for a machine |
| 11/15/1988 | CA1244807A1 Solid state blower |
| 11/01/1988 | US4781546 Linear resonant reciprocating machines |
| 11/01/1988 | US4781032 Energy conserving compressor refrigeration apparatus |
| 09/22/1988 | WO1988007134A1 Stabilizing means for free piston-type linear resonant reciprocating machines |