| Patents for F04C 18 - Rotary-piston pumps specially adapted for elastic fluids (19,462) |
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| 10/07/1997 | US5674058 Scroll-type refrigerant compressor |
| 10/07/1997 | CA2042975C Scroll type fluid displacement apparatus |
| 10/01/1997 | EP0798465A1 Refrigerant compressor |
| 10/01/1997 | EP0798463A2 Oil-free scroll vacuum pump |
| 10/01/1997 | CN1160821A Wave cam type compressor |
| 09/30/1997 | US5672054 Rotary compressor with reduced lubrication sensitivity |
| 09/30/1997 | CA2081411C Motor driven fluid compressor |
| 09/24/1997 | EP0797003A1 Oldham coupling mechanism for a scroll type fluid displacement apparatus |
| 09/24/1997 | EP0796926A1 Production method for high strength die cast product |
| 09/24/1997 | CN2263215Y 轮阀压缩机 Wheel valve compressor |
| 09/24/1997 | CN1160128A Technology for working rotor of Roots pump |
| 09/24/1997 | CN1160127A Counterweight drag eliminator |
| 09/23/1997 | US5669765 Pair of conveyor worms for rotary positive-displacement pumps |
| 09/17/1997 | EP0701662B1 Positive displacement machine with electronic motor synchronisation |
| 09/16/1997 | US5667371 Scroll machine with muffler assembly |
| 09/16/1997 | US5667370 Screw vacuum pump having a decreasing pitch for the screw members |
| 09/16/1997 | CA2060593C Orbiting scroll member assembly |
| 09/10/1997 | CN2262120Y Accentric rotor type general slurry conveyer pump |
| 09/10/1997 | CN1158945A Scroll machine with capacity modulation |
| 09/10/1997 | CN1158944A Eddy gas compressor with by-pass valve |
| 09/09/1997 | US5664941 Bearings for a rotary vane compressor |
| 09/03/1997 | EP0793020A1 Vane type compressor |
| 09/03/1997 | EP0792416A1 Rotary screw compressor with unloading means |
| 09/03/1997 | CN2261520Y Vortex compressor with back pressure hole on fixed vortex disc |
| 09/02/1997 | US5662463 Rotary screw compressor having a pressure bearing arrangement |
| 09/02/1997 | US5661894 Method for assembling an electric motor employing a casing body having low dimensional accuracy |
| 08/27/1997 | CN2260905Y Rolling-piston type compressor with single cylinder and multiple compression chambers |
| 08/27/1997 | CN1157883A Vortex fluid machinery |
| 08/26/1997 | US5660540 Vane guide apparatus of a rotary compressor |
| 08/26/1997 | US5660538 Suction mechanism of a fluid displacement apparatus |
| 08/26/1997 | US5660535 Method of operating a claw-type vacuum pump and a claw-type vacuum pump suitable for carrying out the method |
| 08/20/1997 | CN1157194A Method for casting scroll |
| 08/19/1997 | CA2081433C Method for assembling motor driven fluid compressor |
| 08/13/1997 | EP0653017B1 Arrangement of internal combustion engines provided with a supercharger and a fuel injection system |
| 08/13/1997 | CN2259510Y Rolling rotary air conditioning compressor for vehicle |
| 08/12/1997 | US5655844 Rolling bearing unit |
| 08/12/1997 | US5655782 Seal device for Lysholm compressor |
| 08/06/1997 | CN1156217A Sealed compressor |
| 08/06/1997 | CN1156213A Rotary wheel type fluid function changing device |
| 08/05/1997 | US5653585 Apparatus and methods for cooling and sealing rotary helical screw compressors |
| 07/30/1997 | EP0674751B1 Rotary screw compressor with shaft seal |
| 07/30/1997 | EP0642629B1 Lubrication regulation system |
| 07/29/1997 | US5651930 Composite fiber rotor vane |
| 07/23/1997 | EP0633980B1 Scroll machine with overheating protection |
| 07/23/1997 | CN1155039A Tooth screw stem |
| 07/22/1997 | US5649817 Scroll type fluid machine having first and second bearings for the driving shaft |
| 07/22/1997 | US5649816 Hermetic compressor with heat shield |
| 07/16/1997 | CN1154445A Vortex type fluid machinery |
| 07/16/1997 | CN1035450C Rotary compressor |
| 07/09/1997 | CN1154156A Axial sealing apparatus for scroll type compressor |
| 07/09/1997 | CN1153870A Enhanced rotary compressor valve port entrance |
| 07/08/1997 | US5645408 In a gamma camera system |
| 07/02/1997 | EP0781926A1 Scroll machine with capacity modulation |
| 07/02/1997 | EP0781925A2 Scroll fluid discharging apparatus |
| 07/02/1997 | CN1153259A 旋转压缩机 Rotary compressor |
| 07/01/1997 | US5642992 Multi-rotor helical screw compressor |
| 07/01/1997 | US5642970 Method of producing a curved groove in a workpiece |
| 06/26/1997 | WO1997022808A1 A wedge crank shaft for scroll-type fluid displacement compression apparatus |
| 06/25/1997 | EP0780576A2 Scroll fluid apparatus |
| 06/25/1997 | CN2256949Y Spray pump |
| 06/25/1997 | CN1152674A Wedge-shaped crank axle for displacement vortex fluid compressor |
| 06/25/1997 | CN1152673A Fluid machinery |
| 06/24/1997 | US5641280 For oil-free air |
| 06/24/1997 | US5641279 Swing type rotary compressors having a cut-off portion on the roller |
| 06/24/1997 | US5641278 Scroll compressor |
| 06/24/1997 | US5640854 Scroll machine having liquid injection controlled by internal valve |
| 06/19/1997 | WO1997021926A1 Twin feed screw |
| 06/19/1997 | DE19649163A1 Charger for diesel and Otto engines |
| 06/18/1997 | CN2256475Y 玩具水泵 Toys Pump |
| 06/18/1997 | CN1152080A Anti-rotation mechanism for vortex volume-variable machine |
| 06/17/1997 | US5639225 Scroll type compressor |
| 06/12/1997 | WO1997021033A1 Rotary compressor with reduced lubrication sensitivity |
| 06/11/1997 | CN2256047Y Movable vortex disc structure for well lubrication |
| 06/11/1997 | CN2256046Y Vortex compressor with vortex disc having long damping hole |
| 06/11/1997 | CN1151485A Whirl compressor and its prodn. method |
| 06/10/1997 | US5636976 Tip seal for scroll type compressor and manufacturing method therefor |
| 06/05/1997 | DE19546217A1 Screw compressor with liquid injection |
| 06/04/1997 | EP0777053A1 Scroll fluid machine |
| 06/04/1997 | EP0777052A2 Scroll compressor capacity control valve |
| 06/04/1997 | EP0777051A2 Scroll compressor |
| 06/04/1997 | CN1150997A Positive displacement type vortex fluid compression device with sliding plane thrust bearing |
| 06/04/1997 | CN1035079C Roots pump rotor |
| 06/03/1997 | US5634782 Scroll compressor having a horseshoe-shaped partition wall on the stationary end plate |
| 06/03/1997 | US5634781 Scroll-type compressor having bolted housings |
| 06/03/1997 | CA2099988C Two stage gas compressor |
| 05/29/1997 | WO1997019269A1 A scroll-type fluid displacement compression apparatus having a sliding plate thrust bearing |
| 05/28/1997 | EP0775826A1 Screw compressor |
| 05/27/1997 | US5632613 Lubricating device for horizontal type hermetic compressor |
| 05/27/1997 | US5632612 Scroll compressor having a tip seal |
| 05/27/1997 | US5632611 Scroll type pump |
| 05/27/1997 | US5632610 Sealed-type scroll compressor with relatively shifted scrolls based on thermal coefficient of expansion |
| 05/21/1997 | CN1034968C Horizontal rotary compressor |
| 05/20/1997 | US5630712 Electrically-driven closed scroll compressor having means for minimizing an overturning moment to an orbiting scroll |
| 05/20/1997 | US5630684 Method for machining a scroll member |
| 05/20/1997 | CA2045332C Compressor |
| 05/15/1997 | WO1997017545A1 Helical compressor |
| 05/15/1997 | WO1997017544A1 Radial compliance mechanism for co-rotating scroll apparatus |
| 05/15/1997 | WO1997017543A1 Helical compressor |
| 05/14/1997 | EP0772742A1 Axial sealing apparatus for scroll type compressor |
| 05/14/1997 | EP0663045B1 Method of operating a claw-type vacuum pump, and a claw-type vacuum pump suitable for carrying out the method |