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 18 - Rotary-piston pumps specially adapted for elastic fluids
Patents for F04C 18 - Rotary-piston pumps specially adapted for elastic fluids (19,462)
12/1998
12/09/1998EP0882893A2 Scroll fluid displacement machine
12/09/1998EP0882892A1 Scroll type machine
12/09/1998CN2299951Y Multi-functional gear pump
12/09/1998CN1201116A Vortex compressor
12/09/1998CN1201115A Vortex compressor
12/08/1998US5846065 Scroll compressor with axial biasing
12/08/1998US5846062 Two stage screw type vacuum pump with motor in-between the stages
12/02/1998CN2299170Y Single-stage claw rotor vacuum pump
12/01/1998US5842845 Scroll compressor and method for manufacturing an oldham ring therefor
12/01/1998US5842844 Scroll type compressor with improved rotation preventing means
12/01/1998US5842843 Scroll fluid machine having a cooling passage inside the drive shaft
12/01/1998US5842842 Spiral compressor having an oil chamber in the rotor
12/01/1998US5842271 Apparatus for assembling an electric motor employing a casing body having low dimensional accuracy
11/1998
11/25/1998EP0879964A1 Positive displacement pump
11/19/1998WO1998051931A1 Capacity control scroll compressor
11/19/1998WO1998051930A1 Capacity control scroll compressor
11/19/1998WO1998034759A3 Ergonomically friendly random orbital sander construction
11/18/1998EP0878627A1 Compressor with at least one compressor stage and a moisture separator
11/18/1998EP0878614A2 Screw supercharger for vehicle
11/18/1998CN1199145A Scroll type compressor
11/18/1998CN1040787C Rotative compressor with integral blades and rotator
11/17/1998US5836754 Screw fluid machine and screw gear used in the same
11/17/1998US5836752 Scroll-type compressor with spirals of varying pitch
11/17/1998US5836746 Vacuum pump having lubrication and cooling systems
11/17/1998CA2152454C Scroll compressor
11/17/1998CA2046245C Scroll type compressor with variable displacement mechanism
11/10/1998US5833443 Scroll compressor with reduced separating force between fixed and orbiting scroll members
11/10/1998US5832737 Gas actuated slide valve in a screw compressor
11/04/1998EP0741851B1 Refrigeration system and a method for regulating the refrigeration capacity of such a system
11/04/1998CN1198201A Rotary compressor
11/04/1998CN1040571C Volute Fluid machinery
11/03/1998US5829959 Scroll compressor
11/03/1998US5829957 Screw fluid machine and screw gear used in the same
11/03/1998US5829265 For isolating a compressor of a chiller system
10/1998
10/29/1998WO1998048172A1 Improvements to impeller pumps
10/28/1998EP0874158A1 Vacuum pump with shaft seal
10/28/1998EP0873474A1 Twin-cylinder impeller pump
10/28/1998CN1197503A Calculation and precision processing of cardiocle and expanded cardioid casing curved surfaces for eccentric rotor vane pumps
10/28/1998CN1197166A Multi-stage mechanical high vacuum pump with staged valve
10/28/1998CN1197165A Scroll type compressor
10/21/1998EP0872640A1 A scroll-type compressor with a slider plate for smoothing the orbiting movement of a movable scroll
10/21/1998CN1196776A Scroll compressor
10/21/1998CN1196775A Scroll compressor
10/20/1998US5823757 Axial sealing apparatus for scroll type compressor
10/20/1998US5823756 Scroll fluid discharging apparatus
10/20/1998US5823755 Rotary compressor with discharge chamber pressure relief groove
10/14/1998EP0870927A1 Scroll member for a scroll type fluid machinery
10/14/1998CN1196109A High-pressure dome type compressor
10/13/1998US5820354 Cascaded progressing cavity pump system
10/13/1998US5820349 Rotary compressor with reverse rotating braking
10/08/1998WO1998020259A3 Cascaded progressing cavity pump system
10/07/1998CN1195077A 旋转式压缩机 Rotary compressor
10/06/1998US5816297 Vapor control system
10/06/1998US5816055 Refrigeration system anad a method for regulating the refrigeration capacity of such a system
09/1998
09/30/1998EP0866918A1 Twin feed screw
09/30/1998CN1194337A 压缩机与空气调节器 And air conditioner compressor
09/24/1998DE19812222A1 Double-shaft flow machine for vehicle turbo charger
09/23/1998EP0866227A1 Volumetric blower with covers having a duct for connection to the delivery manifold
09/23/1998EP0866226A1 Displacement fluid machine
09/23/1998EP0865576A1 Scroll element having a relieved thrust surface
09/23/1998EP0706614B1 A fixed vane rotary compressor
09/23/1998CN1193699A Displacement fluid mechanism
09/23/1998CN1193698A 涡旋式压缩机 Scroll compressor
09/22/1998US5810573 Scroll compressor having a baffle plate and oil passages in the orbiting scroll member
09/22/1998US5810572 Scroll compressor having an auxiliary bearing for the crankshaft
09/16/1998EP0864754A1 Oil separator for compressors, scroll compressor using same, and method of manufacturing oil separator for compressors
09/16/1998EP0864753A1 Rotary compressor
09/16/1998CN1193081A 旋转式压缩机 Rotary compressor
09/15/1998US5808380 Self lubricating VANE air motor
09/15/1998US5807091 Multi-rotor helical-screw compressor
09/15/1998US5807090 Vane pump having a hydraulic resistance element
09/15/1998US5807088 Scroll type compressor with chamfered scroll wall
09/15/1998US5807081 Combination valve for screw compressors
09/15/1998US5806336 Refrigeration apparatus and lubricating oil composition
09/15/1998US5806182 Method of processing screw rotor
09/11/1998WO1998039571A1 Installation for compressing a gaseous medium or for creating a vacuum
09/09/1998EP0863313A1 Two stage scroll compressor
09/09/1998CN1192512A Whirl type air compressor
09/09/1998CN1192511A Rotation preventing mechanism having stabilized operation and scroll-type fluid displacement apparatus comprising rotation preventing mechanism
09/09/1998CN1192509A Scroll hydraulic machine
09/08/1998US5803723 Scroll fluid machine having surface coating layers on wraps thereof
09/08/1998US5803722 Rotating scroll compressor having a movable bearing member
09/08/1998US5803716 Scroll machine with reverse rotation protection
09/03/1998DE19711117C1 Anlage zum Verdichten eines gasförmigen Mediums oder zur Erzeugung eines Vakuum System for compressing a gaseous medium or to generate a vacuum
09/02/1998EP0861982A1 A scroll-type fluid displacement compression apparatus having a sliding plate thrust bearing
09/02/1998CN1191958A Combination valve for screw compressors
09/02/1998CN1191940A Composite gear tooth-type gas compressor
09/01/1998US5800151 Method of generating a transverse tooth profile of a screw rotor
09/01/1998US5800149 Electrically-driven closed scroll compressor having means for minimizing an overturning moment to an orbiting scroll
09/01/1998US5800142 Scroll compressor having a counterboring part communicating with an intermediate pressure chamber
09/01/1998US5800141 Scroll machine with reverse rotation protection
08/1998
08/27/1998WO1998037327A1 Two stage vacuum pumping apparatus
08/27/1998CA2252755A1 Two stage vacuum pumping apparatus
08/26/1998EP0859914A1 Helical compressor
08/26/1998EP0859913A1 Radial compliance mechanism for co-rotating scroll apparatus
08/26/1998CN2289078Y Roots blower using liquid medium reducing noise
08/26/1998CN1191592A Oil-sealed vane-type rotary vacuum pump with oil feed
08/26/1998CN1191277A 旋转式压缩机 Rotary compressor
08/19/1998EP0859154A1 Device for sealing a rotor shaft and screw-type compressor provided with such a device
08/18/1998US5795143 Positive displacement pump apparatus
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