| Patents for F04B 25 - Multi-stage pumps specially adapted for elastic fluids (1,208) |
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| 12/29/1993 | CN1080027A 气体压缩机 Gas compressor |
| 11/09/1993 | US5259740 Rotary compressor |
| 10/12/1993 | US5252045 Dual piston reciprocating vacuum pump |
| 10/12/1993 | US5252032 Variable capacity swash plate type compressor |
| 08/17/1993 | US5236311 Compressor device for controlling oil level in two-stage high dome compressor |
| 07/28/1993 | CN1074733A Slant plate type compressor with variable capacity control mechanism |
| 06/09/1993 | DE4139809A1 Multistage piston pump for producing vacuum - has stage arrangement directly adjacent such that outlet of one stage is inlet of next. |
| 05/27/1993 | WO1993010353A1 Piston machine for use as a compressor or motor |
| 05/26/1993 | CN2134505Y Reciprocating compressor with sub-piston |
| 05/12/1993 | CN2132847Y 真空泵 Vacuum pump |
| 05/11/1993 | US5209647 Straight cylinder gas compressor with a reduced diameter compression chamber |
| 02/03/1993 | CN1068630A Air compressor for vehicle |
| 01/27/1993 | CN1068396A Compressor assembly |
| 01/21/1993 | WO1993001411A1 Sleeve piston pump |
| 01/19/1993 | US5180283 Manual two-stage air pump |
| 01/13/1993 | EP0522673A2 Compressor unit |
| 01/11/1993 | CA2072269A1 Compressor assembly |
| 12/23/1992 | CN2125732U Piston type air compression engine |
| 12/23/1992 | CN1067295A Sleeve pump |
| 12/02/1992 | CN2123619U Efficient energy-saving vacuum pump |
| 10/14/1992 | CN2118831U Inner conductive differencial compressor |
| 09/10/1992 | DE4106926A1 Precompressor device for compressor - has single cylinder for two different simultaneous compression strokes |
| 06/09/1992 | CA1302782C Rotary pressure intensifier |
| 05/27/1992 | CN2105572U Electromagnetic liner driving high-pressure compression engine |
| 05/26/1992 | CA1301724C Stationary reciprocating compressor for compressing natural gas |
| 05/13/1992 | CN1061078A Spherical piston type air compressor with main componets made of engineering cernic |
| 04/29/1992 | EP0340214B1 Bounce chambers for multi-cylinder linear engine compressors |
| 01/07/1992 | US5078580 Plural-stage gas compressor |
| 11/05/1991 | CA1291738C Variable displacement compressor |
| 10/15/1991 | US5056991 Cryogas pump |
| 10/02/1991 | CN1055041A Wobble plate type refrigerant compressor having ball-and-socket joint lubricating mechanism |
| 09/17/1991 | US5050233 Rotary compressor |
| 09/17/1991 | US5049038 Fluid compressors |
| 07/09/1991 | US5030065 Reciprocating compressor |
| 06/27/1991 | CA2006689A1 Pressure-driven engine |
| 06/04/1991 | US5020974 Fluid compressors |
| 05/16/1991 | DE3937827A1 Multistage compressor with high pressure reservoir - with operation provided by selective connection of inlet to high compression stage(s) |
| 05/02/1991 | EP0425113A1 Fluid compressors |
| 12/11/1990 | US4976591 Self lubricating, two stage variable compressor |
| 11/06/1990 | US4968219 Multi-stage compressor with seal heating |
| 09/26/1990 | EP0389414A1 Piston compressor |
| 09/18/1990 | US4957416 Gas compressor |
| 09/04/1990 | US4954047 Evacuation apparatus |
| 06/20/1990 | CN1008466B Cylinder block for refrigerating compressor |
| 05/23/1990 | EP0369623A1 Fluid compressors |
| 05/17/1990 | CA2003111A1 Fluid compressors |
| 05/01/1990 | US4920862 Trunk piston compressor |
| 04/19/1990 | DE3835247A1 Multi-stage compressor |
| 04/03/1990 | US4913626 Wobble plate type compressor with variable displacement mechanism |
| 12/27/1989 | CN2050095U Dual-piston gas-filled device |
| 12/20/1989 | CN1006173B Variable capacity type compressor |
| 12/12/1989 | US4886424 Multi-piston swash plate type compressor with damping arrangement for discharge reed valves |
| 11/08/1989 | EP0340214A1 Bounce chambers for multi-cylinder linear engine compressors |
| 10/04/1989 | CN1005347B Valve plate assembly for refrigerant compressor |
| 08/08/1989 | US4854825 Multi-stage vacuum pump |
| 06/14/1989 | CN1004509B Improved piston ring for a piston in a refrigerant compressor |
| 06/14/1989 | CN1004505B Motor power of compressor independent of piston stroke |
| 05/23/1989 | US4832578 Multi-stage compressor |
| 05/16/1989 | US4830580 Two-stage air compressor unit |
| 03/29/1989 | EP0308767A1 Plunger piston compressor |
| 03/14/1989 | US4811558 Gas recovery system |
| 02/08/1989 | EP0302325A2 Wobble plate type compressor with variable displacement mechanism |
| 02/07/1989 | US4802826 Sealed, self-contained, liquid-cooled, gas compressor |
| 01/12/1989 | WO1989000245A1 Bounce chambers for multi-cylinder linear engine compressors |
| 12/28/1988 | CA1247571A Sealed, self-contained, liquid-cooled, gas compressor |
| 12/13/1988 | US4790726 Air free reciprocatory vacuum pump |
| 11/30/1988 | CN88211163U Multipurpose hand-driven portable high pressure inflater |
| 11/15/1988 | US4784579 Hydraulic-pneumatic power transfer unit |
| 11/08/1988 | US4782712 Variable displacement compressor |
| 10/25/1988 | US4780060 For use in a refrigerant circuit |
| 08/31/1988 | EP0280264A2 Multi-stage vacuum pump |
| 08/30/1988 | US4767283 Swash plate type compressor |
| 07/13/1988 | EP0274370A1 Installation for the recovery of a propellant gas and compressor used therefor |
| 07/12/1988 | US4756674 Reciprocating gas compressor having a split housing and crosshead guide means |
| 06/22/1988 | EP0272137A2 Hydraulic pneumatic power transfer unit |
| 06/08/1988 | EP0269882A2 Stationary piston compressor for compressing natural gas |
| 05/31/1988 | US4747753 For use in a refrigeration circuit |
| 05/24/1988 | US4746275 Multi-piston swash plate type compressor with internal lubricating arrangement |
| 05/10/1988 | US4743168 Variable capacity compressor and method of operating |
| 04/19/1988 | CA1235402A1 Refrigerant compressor with a capacity adjusting mechanism |
| 03/29/1988 | US4734014 Shoe-and socket joint between swash plate and pistons of swash plate type compressor |
| 03/09/1988 | EP0258680A1 Wobble plate type compressor with variable displacement mechanism |
| 03/08/1988 | US4729718 Wobble plate type compressor |
| 03/08/1988 | US4729291 Gas compressor |
| 02/24/1988 | EP0256793A1 Slant plate type compressor with variable displacement mechanism |
| 02/17/1988 | CN87201988U Unlubricated air compressor |
| 02/09/1988 | US4723891 Variable displacement wobble plate type compressor with improved crankcase pressure control system |
| 02/02/1988 | US4722671 Cylinder block for a refrigeration compressor |
| 01/12/1988 | US4718832 Electromagnetic reciprocating pump |
| 01/06/1988 | CN86104418A Variable capacity type compressor |
| 01/05/1988 | US4717313 Swash plate type compressor with internal sealing |
| 12/29/1987 | US4715790 Compressor having pulsating reducing mechanism |
| 12/22/1987 | US4714411 Fluid pressure intensifier device |
| 12/01/1987 | US4709555 Variable delivery refrigerant compressor of double-acting swash plate type |
| 11/10/1987 | US4705460 Bounce chambers for multi-cylinder linear engine compressors |
| 11/03/1987 | US4704073 Swash-plate type rotary compressor with lubrication of swash plate and peripheral parts thereof |
| 10/27/1987 | US4702677 Variable displacement wobble plate type compressor with improved wobble angle return system |
| 10/20/1987 | US4701110 Swash-plate type rotary compressor with drive shaft, lubrication |
| 10/20/1987 | US4701109 Compressor with rotation detecting device |
| 10/13/1987 | US4699572 Reciprocatory piston and cylinder machine |