| Patents for F04B 39 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups (22,436) |
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| 01/23/1990 | US4895496 Refrigeration compressor |
| 01/17/1990 | CN1038860A 致冷压缩机 Refrigeration compressor |
| 01/17/1990 | CN1006489B Hermetic motor-compressor unit for a refrigeration circuit |
| 01/16/1990 | CA1264466A1 Refrigerator compressor |
| 01/04/1990 | DE3921423A1 Compression device having an outer housing with a double weld layer, and method for welding an outer housing and a compression unit |
| 01/03/1990 | CN1038499A Sealing device for reciprocating axle rod |
| 01/02/1990 | US4890542 High-pressure-fluid machine, a seal |
| 01/02/1990 | US4890461 Hermetic or semi-hermetic refrigeration motor-compressor unit |
| 12/28/1989 | WO1989012750A1 Improved high pressure reciprocating pump |
| 12/26/1989 | US4889156 Compressor valve with flat spring |
| 12/26/1989 | US4889039 Gas compressor with labyrinth sealing and active magnetic bearings |
| 12/19/1989 | US4887514 Oil separation and gas pressure equalizer means for reciprocating gas compressor |
| 12/19/1989 | EP0248004A4 Bellows seal. |
| 12/13/1989 | EP0346285A1 Valve arrangement |
| 12/13/1989 | EP0346268A1 Function control valve for a compressor |
| 12/13/1989 | EP0345919A2 Refrigeration compressor |
| 12/13/1989 | CN1006083B Lubricating oil supplying device for compressor |
| 12/12/1989 | US4886427 Hermetic scroll compressor with passage group for discharged fluid |
| 12/12/1989 | US4886424 Multi-piston swash plate type compressor with damping arrangement for discharge reed valves |
| 12/12/1989 | US4886392 Press-fit structure of a shaft |
| 12/12/1989 | US4885980 Hydrodynamic bearing |
| 12/06/1989 | EP0345245A2 Ring valve |
| 12/06/1989 | CN2048905U Disengaging contactor for oil sucker rod |
| 11/30/1989 | WO1989007714A3 Apparatus including a compressor |
| 11/29/1989 | EP0343914A1 Evacuation apparatus and method |
| 11/28/1989 | CA1263420A1 Internal compliant seal for compressor |
| 11/23/1989 | EP0342435A1 Piston-cylinder unit as a supply device in a respirator |
| 11/21/1989 | USRE33116 Single-stage oilless screw compressor system |
| 11/21/1989 | US4881455 Piston for use in a gas pump |
| 11/21/1989 | CA1263084A1 Air drying system for pneumatic circuits |
| 11/07/1989 | US4878923 Apparatus for removing oil from a compressed gas flow |
| 11/07/1989 | US4878814 Variable capacity compressor with capacity-indicating device |
| 11/02/1989 | EP0340150A1 Rotary compressors |
| 10/25/1989 | EP0338764A2 Vacuum pumps |
| 10/25/1989 | CN1036618A Separator and biasing plate |
| 10/24/1989 | US4875503 Stop for compressor plate valve |
| 10/18/1989 | EP0337917A1 Separator and biasing plate |
| 10/18/1989 | EP0336992A1 Method and device for testing the operation of a cryogenic pump |
| 10/17/1989 | US4873913 Dry roughing pump having a gas film bearing |
| 10/11/1989 | EP0336893A1 Plunger pump |
| 10/11/1989 | EP0336892A1 Plunger compressor |
| 10/04/1989 | EP0335362A1 Compressor |
| 10/04/1989 | CN1005347B Valve plate assembly for refrigerant compressor |
| 10/03/1989 | US4871300 Compressor spring mounting |
| 10/03/1989 | US4870827 Fiber reinforced resin matrix housing; air conditioner |
| 10/03/1989 | US4870821 Reciprocation apparatus with sealing mechanism |
| 09/27/1989 | EP0334634A1 Slant plate type compressor |
| 09/27/1989 | EP0333961A1 Seal ring for a piston |
| 09/27/1989 | CN2045029U Miniature reciprocating type dual-purpose ball piston pump |
| 09/26/1989 | US4869291 Compressor plate valve |
| 09/26/1989 | US4869289 Adjustable compressor valve which can accommodate changing operating conditions in the compressor to which it is attached |
| 09/26/1989 | CA1259884A1 Combination fluid tank, air/fluid cooler and prime mover/pump mounting system for a hydraulic power unit |
| 09/20/1989 | EP0333667A2 Improvements in air compressors |
| 09/19/1989 | US4867656 Free piston for use in an electromagnetic reciprocating compressor |
| 09/19/1989 | US4867650 Reciprocatory piston type compressor with noise free suction valve mechanism |
| 09/19/1989 | CA1259683A1 Compressor with rotation detection device |
| 09/13/1989 | EP0332272A2 Thermal engine with hydrodynamic bearing |
| 09/12/1989 | US4865527 Lubrication of sealed compressors |
| 09/12/1989 | US4865524 Variable capacity compressor |
| 09/07/1989 | DE3806289A1 Compressor plant |
| 09/07/1989 | DE3805928A1 Air drier |
| 09/07/1989 | DE3805670A1 Guide bearing for guiding a piston rod |
| 09/05/1989 | US4863356 Multi-cylinder refrigerant gas compressor with a muffling arrangement |
| 08/30/1989 | EP0329919A1 Device for the removal of oil from a current of pressurized gas |
| 08/29/1989 | US4861372 Roller in rotary compressor and method for producing the same |
| 08/29/1989 | CA1258838A1 Cylinder head with pressure regulator valve |
| 08/24/1989 | WO1989007714A2 Apparatus including a compressor |
| 08/23/1989 | EP0329282A2 Thermally protected hermetic motor compressor |
| 08/16/1989 | CN2042900U Oil-storing lubrication device for inflator |
| 08/16/1989 | CN1034789A Improvement in reciprocating piston compressor for small refrigerating machines and assembly method therefor |
| 08/15/1989 | CA1258446A1 Differential pressure lubrication system for rolling piston compressor |
| 08/10/1989 | DE3802605A1 Seal for high-speed high-pressure piston pumps |
| 08/08/1989 | US4854839 Compressor valve assembly |
| 08/08/1989 | US4854829 Structure for motor-compressor units used with refrigerant fluids |
| 08/08/1989 | US4854341 Plate valve |
| 08/02/1989 | EP0326043A1 Refrigerant compressor with axial vibration absorption mechanism |
| 08/02/1989 | EP0325833A2 High side scotch yoke compressor |
| 08/02/1989 | EP0325696A2 Compressor valve system |
| 08/02/1989 | EP0325695A2 Compressor discharge muffler having cover plate |
| 08/02/1989 | EP0325694A2 Compressor |
| 08/02/1989 | EP0325693A2 Compressor lubrication system including shaft seals |
| 08/02/1989 | CN1034408A Motor compressor lubrication |
| 08/01/1989 | US4852608 Fluid control valve |
| 07/27/1989 | DE3901710A1 Motor support for hermetic refrigerant compressors |
| 07/26/1989 | EP0325089A1 Valve set for a compressor |
| 07/26/1989 | EP0325088A1 Valve set for a compressor |
| 07/25/1989 | US4850819 Motor compressor bearing assembly |
| 07/25/1989 | US4850816 Refrigerant gas compressor unit |
| 07/25/1989 | US4850806 Controlled by-pass for a booster pump |
| 07/18/1989 | US4848989 In-line filter assembly for compressed air |
| 07/18/1989 | US4848213 Reciprocating piston compressor with offset cylinder |
| 07/11/1989 | US4846635 Hermetic compressor mounting pin |
| 07/04/1989 | US4844705 Suction line adaptor and filter for a hermetic compressor |
| 06/29/1989 | WO1989005898A1 Automatic clearance adjuster |
| 06/28/1989 | CN2040174U New-type oil-isolation structure for an air compressor |
| 06/27/1989 | US4842492 Compressor discharge muffler having cover plate |
| 06/27/1989 | US4842489 Hand-operated pump changeable from dual action to single action |
| 06/27/1989 | US4842287 Helium pressure seal for a cryogenic refrigerator |
| 06/22/1989 | DE3839964A1 Cylinder carrier for hermetic refrigerant compressors |
| 06/21/1989 | CN1033474A Rotary axis for closed electric compressor |