| Patents for F04C 23 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids (6,201) |
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| 03/09/2000 | WO2000012901A1 Fluid compressor aftercooler temperature control system and method |
| 03/07/2000 | USRE36604 Scroll type compressor having curved surface portions between the shaft and bearing means |
| 03/07/2000 | CA2099989C Multi-stage gas compressor incorporating bypass valve device |
| 02/29/2000 | US6030192 Scroll compressor having bearing structure in the orbiting scroll to eliminate tipping forces |
| 02/23/2000 | CN1245258A Rotary compressor, refrigerating circulation and ice house using same |
| 02/22/2000 | US6027321 Scroll-type compressor having an axially displaceable scroll plate |
| 02/22/2000 | US6027317 Scroll type machine |
| 02/15/2000 | US6024547 Power-variable compressor and air conditioner using the same |
| 02/09/2000 | EP0978655A1 Rotary compressor, refrigerating cycle using the compressor, and refrigerator using the compressor |
| 02/02/2000 | EP0975875A1 Vacuum pump system fitted with a liquid mechanical pump |
| 02/02/2000 | EP0792434B1 System and method for performing cooling |
| 02/02/2000 | CN1243204A Resonator for rotary compressor |
| 02/02/2000 | CN1243202A Tube assembly of energy-saving device of compressor |
| 02/01/2000 | US6018957 Method and apparatus for controlling beats and minimizing pulsation effects in multiple compressor installations |
| 01/26/2000 | EP0974755A2 Compressor economizer tube assembly |
| 01/26/2000 | CN1242477A Sealed-type compressor |
| 01/25/2000 | US6017205 Scroll compressor |
| 01/25/2000 | US6017203 Scroll compressor having separation plate between high and low pressures |
| 01/19/2000 | EP0973233A1 Sealed-type compressor |
| 01/18/2000 | CA2134923C Scroll compressor stabilizer ring |
| 01/11/2000 | US6012911 Scroll type compressor having an oil supply path for the eccentric bearing |
| 01/11/2000 | CA2055907C Rotary type multi-stage gas compressor |
| 01/06/2000 | WO2000000744A1 Two stage compressor and a method for cooling such a compressor |
| 01/05/2000 | EP0969210A1 Sealed compressor mounted between horizontal and vertical |
| 01/04/2000 | US6010320 Compressor system having an oil separator |
| 12/29/1999 | CN1239757A Rotary compressor having plurality of compression chambers for multistage compression |
| 12/23/1999 | WO1999066209A1 Pulp pump |
| 12/22/1999 | EP0965758A2 Vacuum pump |
| 12/22/1999 | EP0965757A2 Vacuum pumps |
| 12/22/1999 | EP0965756A2 Screw pump |
| 12/14/1999 | US6000917 Control of suction gas and lubricant flow in a scroll compressor |
| 12/14/1999 | US6000423 Gas pressure maintenance booster system |
| 12/09/1999 | DE19923229A1 Method for collecting lubricating oil separated from the working fluid in a motor driven compressor |
| 12/07/1999 | US5996355 Thermodynamic closed cycle power and cryogenic refrigeration apparatus using combined work medium |
| 12/02/1999 | DE19919141A1 Electric motor driven compressor for use as coolant compressor in an air conditioning system for motor vehicle |
| 12/02/1999 | DE19823524A1 Verbund(kälte)anlage und Verfahren zum Betreiben einer Verbund(kälte)anlage Composite (refrigeration) system and method for operating a compound (refrigeration) system |
| 12/01/1999 | EP0961091A2 Compound refrigerating installation and method for operating a compound refrigerating installation |
| 12/01/1999 | EP0819220B1 Gas flow and lubrication of a scroll compressor |
| 11/23/1999 | US5988223 Sealing plug device for a refrigerant compressor |
| 11/16/1999 | US5984653 Mechanism and method for aligning a fixed scroll in a scroll compressor |
| 11/10/1999 | CN1234492A Air conditioner adopting volute compressor |
| 11/04/1999 | WO1999047813A3 Scroll-type fluid displacement apparatus including an eccentric crank mechanism having an elongated shaft |
| 11/03/1999 | EP0953771A1 Single-stage and multi-stage roots pump |
| 11/03/1999 | EP0635094B1 Scroll machine |
| 11/03/1999 | CN1233716A Hermetic rotary compressor |
| 11/02/1999 | US5975854 Compressor with protection module |
| 11/02/1999 | CA2097203C Integrally formed counterweight for rotor end ring |
| 10/27/1999 | CN2345741Y Four-line type power increasing driving device |
| 10/19/1999 | CA2153428C Rotor counterweight insert apparatus and method for making same |
| 10/13/1999 | EP0949465A2 Compressor for refrigeration cycle |
| 10/06/1999 | CN1231022A Seal structure for casing |
| 10/06/1999 | CN1045486C Sealed electric compressor with two cylinders |
| 10/05/1999 | US5961297 Oil-free two stage scroll vacuum pump and method for controlling the same pump |
| 09/23/1999 | WO1999047813A2 Scroll-type fluid displacement apparatus including an eccentric crank mechanism having an elongated shaft |
| 09/14/1999 | US5951269 Scroll compressor having well-balanced rotary elements |
| 09/14/1999 | US5951266 Evacuating apparatus having interengaging rotors with threads having a decreasing pitch at the exhaust side |
| 09/07/1999 | US5947711 Rotary screw air compressor having a separator and a cooler fan assembly |
| 09/07/1999 | US5947710 Rotary compressor with reduced lubrication sensitivity |
| 09/07/1999 | US5947694 Scroll-type vacuum pumping apparatus |
| 08/31/1999 | US5944500 Scroll-type fluid displacement apparatus having a strengthened inner terminal end portion of the spiral element |
| 08/26/1999 | DE19907492A1 Carbon dioxide compressor for air conditioning systems in which narrow oil passages are avoided |
| 08/25/1999 | EP0937895A2 Screw fluid machine |
| 08/25/1999 | EP0937894A2 Screw fluid machine and screw gear used in the same |
| 08/25/1999 | CN2334919Y Multi-stage flexible shaft water pump |
| 08/25/1999 | CN1226640A Hermetic compressor |
| 08/18/1999 | EP0936422A2 Apparatus having refrigeration cycle |
| 08/11/1999 | EP0935106A2 Multi-stage compressing refrigeration device and refrigerator using the device |
| 08/10/1999 | US5935297 Pressure vacuum swing adsorption of oxygen from air;adsorption, desorption |
| 08/03/1999 | US5931649 Motor compressor |
| 07/29/1999 | DE19800711A1 Mostly dry working screw spindle vacuum pump |
| 07/27/1999 | US5928407 Alternating pressure apparatus for obtaining oxygen from the air and method for the operation thereof |
| 07/14/1999 | CN1222652A Closed-type scroll compressor |
| 07/13/1999 | US5921761 Scroll machine with discharge duct |
| 06/30/1999 | EP0926344A1 Seal structure for casing |
| 06/30/1999 | CN1221076A Scroll compressor with integral outer housing and fixed scroll member |
| 06/24/1999 | WO1999031355A1 Improved scroll compressor assembly |
| 06/23/1999 | EP0924431A1 Scroll compressor |
| 06/23/1999 | EP0924430A1 Closed-type scroll compressor |
| 06/17/1999 | WO1999030005A1 Rotary positive-displacement machines |
| 06/15/1999 | US5911743 Expansion/separation compressor system |
| 06/02/1999 | EP0918938A1 Friction vacuum pump |
| 06/02/1999 | CN1218143A Hermetic compressor |
| 05/20/1999 | WO1999024718A1 Hermetic scroll compressor |
| 05/18/1999 | US5904472 Motor pump unit for a vapor return system |
| 05/06/1999 | EP0912831A2 Compressor system |
| 05/06/1999 | DE19752167A1 Compressor plant with ventilating fan and cooler at respective opposite ends |
| 05/05/1999 | CN1215801A Helical impeller compressor |
| 05/05/1999 | CN1215800A Helical compressor and method of assembling the same |
| 05/04/1999 | US5899668 Two-stage liquid ring pumps having separate gas and liquid inlets to the second stage |
| 04/27/1999 | US5897306 Partition and pilot ring for scroll machine |
| 04/22/1999 | WO1999019631A1 Screw vacuum pump provided with rotors |
| 04/22/1999 | WO1999019630A1 Cooled screw vacuum pump |
| 04/15/1999 | DE19745616A1 Cooling system for helical vacuum pump |
| 04/15/1999 | DE19745615A1 Screw vacuum pump with rotors |
| 04/14/1999 | CN1042969C 涡旋压缩机 Scroll Compressor |
| 03/31/1999 | EP0904494A1 Scroll-type vacuum pumping apparatus |
| 03/31/1999 | EP0746685B1 Scroll compressor drive having a brake |
| 03/31/1999 | CN1212333A Oil-cooled type screw compressor |
| 03/18/1999 | DE19739279A1 Compressor plant |
| 03/09/1999 | US5879138 Two-stage rotary vane vacuum pump |