| 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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| 11/02/1993 | US5257913 Hand tool for producing local over or under pressure |
| 11/02/1993 | CA1323865C Axial sealing mechanism for a scroll type compressor |
| 10/28/1993 | WO1993021440A1 Compressor assembly with staked shell |
| 10/19/1993 | US5253489 Scroll type compressor with injection mechanism |
| 10/14/1993 | WO1993020332A1 Scroll machine |
| 09/28/1993 | US5247738 Method for assembling motor driven fluid compressor |
| 09/28/1993 | US5247736 Method of manufacturing a multipiece eccentric shaft |
| 09/21/1993 | US5246356 Sound abatement in rotary compressors |
| 09/14/1993 | US5244352 Multi-stage vacuum pump installation |
| 09/08/1993 | CN1076010A Convolute-hydrodynamic mechanics |
| 09/08/1993 | CN1076009A A method for dynamically balancing nested coupling mechanisms for scroll machines |
| 09/07/1993 | US5242280 Rotary type multi-stage compressor with vanes biased by oil pressure |
| 09/02/1993 | DE4305876A1 Spiral compressor with anti-spin mechanism - uses counter mass with cylindrical depression to balance rotating spiral element |
| 09/01/1993 | EP0558167A1 Scroll-type fluid machine |
| 08/31/1993 | US5240391 Compressor suction inlet duct |
| 08/31/1993 | US5240386 Multiple stage orbiting ring rotary compressor |
| 08/04/1993 | EP0440677B1 Machine for a gaseous medium |
| 07/27/1993 | US5230616 Rotary compressor with shaft balancers |
| 07/21/1993 | CN1074512A Nested coupling mechanism for scroll machines |
| 07/20/1993 | US5228196 Method for preparing a scroll compressor |
| 07/06/1993 | US5224848 Scroll compressor with discharge valve opened by centrifugal force |
| 07/06/1993 | US5224836 Control system for prime driver of compressor and method |
| 06/29/1993 | US5222881 Scroll type compressor having curved surface portions between the shaft and bearing means |
| 06/23/1993 | EP0548003A1 Oldham coupling for scroll machine |
| 06/23/1993 | EP0548001A1 A method for dynamically balancing an Oldham coupling for a scroll machine |
| 06/22/1993 | US5221191 Horizontal rotary compressor |
| 06/18/1993 | CA2084371A1 Nested coupling mechanism for scroll machines |
| 06/15/1993 | US5219281 Fluid compressor with liquid separating baffle overlying the inlet port |
| 06/01/1993 | US5215451 Scroll type compressor having stepped assembling portions on the center shell |
| 06/01/1993 | US5214928 Refrigeration apparatus and methods |
| 05/26/1993 | EP0543756A1 Compact portable air compressor unit |
| 05/25/1993 | US5213490 Scroll-type compressor with discharge opening above the lubricant reservoir |
| 05/25/1993 | US5213489 Scroll compressor with axial vibration prevention for a shaft bearing |
| 05/19/1993 | EP0541989A1 Multi-stage vacuum pumping system |
| 05/18/1993 | US5211550 Scroll type fluid compressing apparatus with a thrust ring plate having flat and parallel circumferential opposite surfaces extending over an oldham ring |
| 05/18/1993 | US5211031 Scroll type compressor and refrigeration cycle using the same |
| 05/13/1993 | WO1993010356A1 Two-stage gas compressor |
| 05/13/1993 | WO1993010355A1 Multi-stage gas compressor provided with bypass valve device |
| 05/11/1993 | US5209653 Vacuum pump |
| 05/11/1993 | CA1317470C Compressor mounting apparatus |
| 04/28/1993 | EP0539239A1 Motor driven fluid compressor |
| 04/28/1993 | EP0538973A1 Aircooled compressor unit |
| 04/28/1993 | EP0538892A1 Motor driven fluid compressor |
| 04/28/1993 | EP0538804A1 Method for assembling motor driven fluid compressor |
| 04/25/1993 | CA2081434A1 Motor driven fluid compressor |
| 04/19/1993 | WO1993008405A1 Compressor interstage coolant injector nozzle |
| 04/06/1993 | US5199859 Refrigerant compressor |
| 04/06/1993 | US5199858 Oil injection type screw compressor |
| 03/30/1993 | US5197868 Scroll-type machine having a lubricated drive bushing |
| 03/30/1993 | US5197861 Fluid rotating apparatus |
| 03/11/1993 | DE4129897A1 Control for interlinking of multistage vacuum pumps - has connection channel between pump stages with stroke valve, coupled to discharge valve |
| 03/09/1993 | US5192199 Machine for a gaseous medium |
| 03/03/1993 | EP0529660A1 Two-stage scroll compressor |
| 03/03/1993 | CN1019994C Scroll type fluid machinery |
| 02/23/1993 | US5188520 Scroll type compressor with frames supporting the crankshaft |
| 02/17/1993 | CN2127123Y Adjustable gas rotary slice pump |
| 02/17/1993 | CN1069107A Compressor, and method of manufacturing same |
| 02/16/1993 | US5186616 Scroll type fluid machinery with reduced pressure biasing the stationary scroll |
| 02/11/1993 | DE4118843A1 Liquid ring gas pump with overhung impeller - has stand mounted to part of housing remote from drive |
| 02/10/1993 | EP0527102A1 Hydraulic compressor |
| 02/09/1993 | US5184940 Fluid compressor |
| 02/03/1993 | EP0526145A2 Compressor, and method of manufacturing same |
| 01/21/1993 | DE4123938A1 Liquid ring vacuum pump - has pressure medium fed directly to slide ring seal chamber and vane chamber |
| 01/20/1993 | EP0523551A1 Screw vacuum pump |
| 01/20/1993 | EP0523550A1 Screw vacuum pump |
| 01/12/1993 | US5178522 Method and apparatus for supplying oil to a vacuum pump |
| 12/30/1992 | EP0520517A1 Housing for hermetic motor compressor |
| 12/29/1992 | US5174738 Slider block for a scroll compressor having edge loading relief under load |
| 12/29/1992 | US5174736 Scroll-type compressor with cover member for suction and discharge cavities |
| 12/22/1992 | US5173041 Multistage vacuum pump with interstage solid material collector and cooling coils |
| 12/22/1992 | CA1311729C Scroll machine with plural pressurized seal enhancing chambers and static vane mounts |
| 12/17/1992 | DE4215513A1 Pump for delivering and-or compressing fluids - has rotating spiral scroll centre of gravity between drive shaft bearings |
| 12/15/1992 | US5170636 Heat exchanger |
| 12/02/1992 | EP0515929A1 Vane vacuum pump |
| 10/20/1992 | US5155908 Method for assembling a one-piece rotor system and a pump ring for a two-stage vacuum pump |
| 10/20/1992 | CA1309126C Enclosed type electric compressor |
| 10/20/1992 | CA1309070C Scroll compressor |
| 10/14/1992 | EP0508293A1 Scroll type compressor with injection mechanism |
| 10/13/1992 | US5154591 Displacement machine employing a plurality of intermeshing spiral displacement bodies |
| 10/06/1992 | US5152682 Scroll type fluid machine with passageway for innermost working chamber |
| 10/06/1992 | US5152156 Rotary compressor having a plurality of cylinder chambers partitioned by intermediate partition plate |
| 09/29/1992 | US5150742 Vapor recovering device for volatile liquid dispensing apparatus |
| 09/24/1992 | DE4109207A1 Cell compressor with crescent-shaped working chamber - has motor flange and compressor flange held by screws in oversize holes |
| 09/17/1992 | WO1992015786A1 Device for supplying a multi-stage dry-running vacuum pump with inert gas |
| 09/08/1992 | US5145335 Low-noise vacuum pump |
| 09/02/1992 | WO1992015774A1 Thermodynamic systems including gear type machines for compression or expansion of gases and vapors |
| 09/02/1992 | CN1018124B Rotor balancing |
| 09/02/1992 | CA2105296A1 Thermodynamic systems including gear type machines for compression or expansion of gases and vapors |
| 08/25/1992 | US5141421 Nested coupling mechanism for scroll machines |
| 08/25/1992 | US5141420 Scroll compressor discharge valve |
| 08/25/1992 | US5141417 Method for dynamically balancing nested coupling mechanisms for scroll machines |
| 08/20/1992 | WO1992014060A1 Dry-running twin-shaft vacuum pump |
| 08/20/1992 | WO1992014059A1 Dry-running vacuum pump |
| 08/18/1992 | US5139399 Compressor interstage coolant injector nozzle |
| 08/12/1992 | EP0498165A1 Scroll compressor |
| 08/12/1992 | EP0498164A1 Scroll compressor |
| 08/12/1992 | EP0497995A1 Dry running vacuum pump |
| 08/11/1992 | US5137437 Scroll compressor with improved bearing |
| 08/04/1992 | US5135368 Multiple stage orbiting ring rotary compressor |
| 07/30/1992 | DE4201486A1 Oil-free screw compressor installation - has turbo supercharger which raises atmospheric air pressure prior to compressor entry |