Patents
Sitemap › F04 - Positive-displacement machines for liquids; Pumps for liquids or elastic fluids › F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquids; Rotary-piston, or oscillating-piston, positive-displacement pumps › F04C 28 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
Patents for F04C 28 - Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids (4,928)
10/1998
10/21/1998CN1196472A Seal compressor and refrigeration air-condition device using said compressor
10/15/1998DE19715480A1 Vakuumpumpsystem mit einer Flüssigringpumpe Vacuum pump system with a liquid ring pump
10/13/1998US5820349 Rotary compressor with reverse rotating braking
10/06/1998US5816055 Refrigeration system anad a method for regulating the refrigeration capacity of such a system
10/01/1998DE19713197A1 Automobile air-conditioning device operating method
09/1998
09/30/1998CN1194337A 压缩机与空气调节器 And air conditioner compressor
09/29/1998US5814913 Multishaft electric motor and positive-displacement pump combined with such multishaft electric motor
09/15/1998US5807081 Combination valve for screw compressors
09/15/1998US5806324 Variable capacity vapor compression cooling system
09/11/1998WO1998039570A1 Vacuum pump
09/10/1998DE19709206A1 Vakuumpumpe Vacuum pump
09/09/1998EP0863313A1 Two stage scroll compressor
09/09/1998CN1192512A Whirl type air compressor
09/08/1998US5803716 Scroll machine with reverse rotation protection
09/02/1998CN1191958A Combination valve for screw compressors
09/01/1998US5800142 Scroll compressor having a counterboring part communicating with an intermediate pressure chamber
09/01/1998US5800141 Scroll machine with reverse rotation protection
09/01/1998US5799497 Refrigerating apparatus
08/1998
08/25/1998US5797729 Controlling multiple variable speed compressors
08/19/1998EP0858559A1 Scroll compressors
08/18/1998US5794915 Safety relief valve assembly for a fluid displacement apparatus
08/13/1998WO1998035134A1 Rotary device with means for monitoring and adjusting the clearance between the rotors
08/13/1998CA2280016A1 Rotary device with means for monitoring and adjusting the clearance between the rotors
08/12/1998EP0857876A2 Method and apparatus to control the suction capacitiy of vacuum pumps
08/11/1998US5791884 Scroll compressor with sealed terminal
08/11/1998US5791315 Control system for screw type supercharging apparatus
08/04/1998US5788472 Hermetic rotary compressor with eccentric roller
07/1998
07/29/1998EP0855519A2 Monoblock controller for automatically regulating the pressure in a reservoir
07/22/1998EP0854293A1 Power-variable compressor and air conditioner using the same
07/22/1998EP0854292A1 Compressor with pressure relief valve
07/21/1998US5782610 Method of stopping scroll compressor that is driven by 3-phase DC motor
07/14/1998US5779450 Refrigerating apparatus having a fluid compressor
07/08/1998EP0852295A1 Compressor with valve for by-pass and anti-reverse rotation control
07/07/1998US5775883 Rolling-piston expander apparatus
07/07/1998US5775882 Multicylinder rotary compressor
07/07/1998US5775117 Variable capacity vapor compression cooling system
07/01/1998CN1186174A Scroll machine with reverse rotation sound attenuation
06/1998
06/30/1998US5772416 Scroll-type machine having lubricant passages
06/30/1998US5772415 Scroll machine with reverse rotation sound attenuation
06/24/1998CN1185823A Varialle-displacement screw-type compressor
06/18/1998WO1998026183A1 Improved gas actuated slide valve in a screw compressor
06/18/1998WO1998026181A2 Gerotor pump for liquid media
06/17/1998CN1184894A Scroll machine with reverse rotation protection
06/16/1998US5767635 Displacement machine with electronic motor synchronization
06/16/1998CA2131181C Compressor slide valve control
06/11/1998WO1998025030A1 Hermetic compressor intended for circulating gas
06/10/1998EP0846865A1 Suction valve device for refrigerant compressors
06/10/1998EP0846863A1 Scroll compressor
06/09/1998CA2124132C Rotary compressor
05/1998
05/27/1998EP0844398A1 Scroll machine with reverse rotation protection
05/27/1998EP0843777A1 Reverse rotation preventing clutch
05/27/1998CN1183136A Screw-type compressor with water hammer protection
05/20/1998EP0843098A1 Scroll compressor
05/19/1998US5752812 Vapor recovery pump
05/19/1998US5752806 Method of reducing noise from the flow of gaseous media in a single rotation machine using a bypass for compression control
05/12/1998US5749710 Refrigerant compressor with rotation detecting means
05/06/1998EP0840011A1 Scroll machine with reverse rotation sound attenuation
05/06/1998EP0725902A4 Tank mounted rotary compressor
05/06/1998CN1180792A Vortex compressor
05/05/1998US5746581 Method and apparatus for evacuating vacuum system
05/05/1998US5745992 Method of making a scroll-type machine
04/1998
04/30/1998WO1998017915A1 A screw compressor with adjustment slide means
04/28/1998US5743720 Scroll compressor with axial biasing
04/28/1998US5743719 Oil-free scroll vacuum pump having a gas ballast part
04/22/1998EP0647293B1 Piston unloader arrangement for screw compressors
04/22/1998CN1179512A Scroll-type compressor with variable displacement mechanism
04/21/1998US5741120 Capacity modulated scroll machine
04/15/1998EP0836007A1 Vane vacuum pumps or compressors
04/15/1998CN1038060C Swing rotary compressor
03/1998
03/31/1998US5732560 System and method for performing cooling
03/31/1998CA2113043C Scroll compressor unloader valve
03/25/1998EP0683320B1 Swinging rotary compressor
03/25/1998CN1177062A Turbine type compressor
03/24/1998US5730586 Supercharger with integral by-pass passage
03/18/1998EP0828941A1 Variable-displacement screw-type compressor
03/18/1998CN1176680A Gas actuated slide valve in a screw compressor
03/03/1998US5722816 Gas compressor
02/1998
02/25/1998CN1174294A Variable speed drive refrigerant compressor, and refrigeration cycle apparatus including the same
02/17/1998US5718565 Apparatus and process for operating a dry-compression vacuum pump
02/11/1998EP0823025A1 Screw-type compressor with water hammer protection
02/11/1998CN1173218A Pump having relief valve seat free of direct structural restraint
02/11/1998CN1172909A Screw gas compressor
02/05/1998DE19729615A1 Adjustable rotary piston machine
02/04/1998EP0822335A2 Scroll compressor
02/03/1998US5713724 System and methods for controlling rotary screw compressors
01/1998
01/21/1998CN1170829A Closed rotary compressor
01/20/1998US5709537 Evacuating apparatus
01/14/1998CN1170087A Scroll type compressor with improved variable displacement mechanism
01/13/1998US5707223 Rotary screw compressor having a thrust balancing piston device and a method of operation thereof
01/13/1998US5707210 Scroll machine with overheating protection
01/07/1998EP0816685A1 Scroll-type compressor with variable displacement mechanism
12/1997
12/31/1997WO1997049918A1 Scroll compressor
12/16/1997US5697771 Vacuum pump with oil separator
12/16/1997US5697763 Tank mounted rotary compressor
12/10/1997EP0811123A1 Gas actuated slide valve in a screw compressor
12/10/1997EP0811122A1 Pump having relief valve seat free of direct structural restraint
12/09/1997US5694682 Method of manufacturing valve system for capacity control of a screw compressor
12/04/1997WO1997045642A1 Scroll compressor
12/04/1997DE19722688A1 Compressor, e.g. for use in automobile air conditioning
12/03/1997EP0681657B1 Control system for screw type supercharging apparatus
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