| Patents for F04C 18 - Rotary-piston pumps specially adapted for elastic fluids (19,462) |
|---|
| 12/24/1991 | US5074761 Rotary compressor |
| 12/24/1991 | US5074760 Scroll type compressor |
| 12/17/1991 | US5073093 Scroll-type fluid handling machine |
| 12/17/1991 | CA1293229C Rotary air pumping apparatus with radial seal assemblies on piston |
| 12/11/1991 | EP0460864A1 Vapor recovering device for volatile liquid dispensing apparatus |
| 12/11/1991 | EP0460578A1 Screw fluid machine |
| 12/11/1991 | CN2090441U Gas motor with single-magnetic vanes |
| 12/11/1991 | CN2090440U Roots vacuum pump capable of direct discharging to atmosphere |
| 12/10/1991 | US5071330 Roller-vane hydraulic machine |
| 12/10/1991 | US5071329 Scroll type fluid transferring machine with thermoplastic Oldham ring |
| 12/10/1991 | US5071323 Scroll compressor with bypass release passage in stationary scroll member |
| 12/04/1991 | EP0459116A1 Silent vacuum pump |
| 12/04/1991 | EP0459112A1 Rotary vane vacuum pump |
| 12/04/1991 | EP0381682B1 Rotary piston compressor |
| 12/04/1991 | EP0302877B1 Rotary positive displacement machine for a compressible working fluid |
| 12/04/1991 | CN1056730A Low differential control rotary piston machinery |
| 12/03/1991 | US5069605 Scroll fluid machine having a sealing member radially inwardly of a thrust bearing |
| 12/03/1991 | CA1292729C Multi-section roots vacuum pump of reverse flow cooling type with internal flow division arrangement |
| 11/28/1991 | WO1991018207A1 Scroll compressor |
| 11/28/1991 | DE4116747A1 Vane cell compressor - has two outlet channels in one of two side parts and several grooves in rotor outer peripheral surface to support outflow |
| 11/27/1991 | EP0458135A1 Roots-type blower with improved inlet |
| 11/27/1991 | EP0458134A1 Inlet port opening for a Roots-type blower |
| 11/26/1991 | US5067884 Unitized structure of main bearing and cylinder of rotary compressor |
| 11/21/1991 | EP0457603A1 A scroll type fluid displacement apparatus |
| 11/21/1991 | EP0456688A1 Rotary screw compressor with inlet chamber. |
| 11/19/1991 | US5066206 Fluid scroll machine with torque transmitting coupling between scrolls |
| 11/19/1991 | US5065550 Lapping of involute spiral scroll element |
| 11/14/1991 | WO1991017360A1 Scroll compressor |
| 11/14/1991 | WO1991017012A1 Rotor for a rotary screw machine, a rotary screw machine and a process for manufacturing a rotor |
| 11/12/1991 | US5064363 Non-lubricated screw machine with a rotor having a taper and varied helical angle |
| 11/12/1991 | US5064361 Rotating pneumatic vane motor with air bearing |
| 11/12/1991 | US5064356 Counterweight shield for refrigeration compressor |
| 11/07/1991 | CA2016172A1 Self-machining seal ring leakage prevention assembly for rotary vane device |
| 11/06/1991 | EP0454794A1 Vacuum drainage system. |
| 11/05/1991 | US5062779 Outlet valve for a rolling piston rotary compressor |
| 11/05/1991 | US5062778 Helical blade type compressor with thrust loss compensation |
| 10/31/1991 | WO1991016543A1 Scroll compressor |
| 10/29/1991 | US5060531 Screw rotor |
| 10/23/1991 | EP0452896A1 Lubrication for scroll compressor |
| 10/23/1991 | CN1055585A Gas compressor with rotary piston |
| 10/22/1991 | US5059102 Fluid scroll machine with peripherally attached counter weights and reduced thickness scroll |
| 10/22/1991 | US5059098 Apparatus for varying capacity of scroll type compressor |
| 10/18/1991 | CA2040721A1 Hermetically sealed scroll type refrigerant compressor with an improved lubricating mechanism |
| 10/17/1991 | WO1991015679A1 Rotary corradial-vane compressor |
| 10/17/1991 | DE4011952A1 Rotary piston pump with slotted pistons - has piston rotors with plates having different thermal expansion coefficient |
| 10/16/1991 | CN1014346B Rotary compressor |
| 10/15/1991 | US5056995 Displacement compressor with reduced compressor noise |
| 10/15/1991 | US5056990 Variable capacity vane compressor |
| 10/15/1991 | US5056336 Scroll apparatus with modified scroll profile |
| 10/10/1991 | DE4107720A1 Single rotary vane pump - has valve connected to shaft via sliding bar linkage |
| 10/09/1991 | CN1014256B Fluid compressor |
| 10/09/1991 | CN1014255B Fluid compressor |
| 10/08/1991 | US5055017 Mechanical pumps |
| 10/08/1991 | US5055016 Alloy material to reduce wear used in a vane type rotary compressor |
| 10/08/1991 | US5055012 Scroll compressor with bypass release passage in stationary scroll member |
| 10/08/1991 | US5055010 Suction baffle for refrigeration compressor |
| 10/08/1991 | CA1290301C Rotary drive apparatus |
| 10/01/1991 | US5052901 Lift valve in a rotary screw machine |
| 09/24/1991 | US5051079 Two-piece scroll member with recessed welded joint |
| 09/24/1991 | US5051077 Screw compressor |
| 09/24/1991 | US5051076 Two-cylinder-type rotary compressor system having improved suction pipe coupling structure |
| 09/24/1991 | US5051075 Gearing system having interdigited teeth with convex and concave surface portions |
| 09/24/1991 | US5051070 Variable capacity compressor |
| 09/17/1991 | US5049052 Light weight vane-type rotary compressor |
| 09/17/1991 | US5049044 Compressor for heat pump and method of operating said compressor |
| 09/17/1991 | US5049043 Variable capacity vane compressor |
| 09/17/1991 | US5049041 Lubricating oil supply device for van compressors |
| 09/11/1991 | EP0296218B1 Profiles of screw-type rotors for rotary machines conveying a gaseous fluid |
| 09/10/1991 | US5046932 Rotary epitrochoidal compressor |
| 09/03/1991 | US5044909 Valve device for control of the inner volume relation in a screw type rotary compressor |
| 09/03/1991 | US5044908 Vane-type rotary compressor with side plates having separate boss and flange sections |
| 09/03/1991 | US5044907 Rotor device having inner rotor and driven outer rotor |
| 09/03/1991 | US5044906 Screw rotor for screw pump device having negative torque on the female rotor |
| 09/03/1991 | US5044904 Multi-piece scroll members utilizing interconnecting pins and method of making same |
| 09/03/1991 | US5044894 Capacity volume ratio control for twin screw compressors |
| 09/03/1991 | CA1288285C Pump with vane actuating system |
| 08/28/1991 | EP0443705A1 Scroll compressor |
| 08/27/1991 | US5042150 Method of assembling a scroll compressor |
| 08/22/1991 | WO1991012432A1 Rotary screw machine having thrust balancing means |
| 08/21/1991 | WO1991013240A1 Gearing system |
| 08/20/1991 | US5040959 Roots blower with improved clearance between rotors |
| 08/20/1991 | US5040958 Scroll compressor having changeable axis in eccentric drive |
| 08/20/1991 | US5040956 Magnetically actuated seal for scroll compressor |
| 08/20/1991 | US5040952 Scroll-type compressor |
| 08/20/1991 | US5040949 Two stage dry primary pump |
| 08/14/1991 | EP0440677A1 Machine for a gaseous medium. |
| 08/13/1991 | US5039289 Rotary piston blower having piston lobe portions shaped to avoid compression pockets |
| 08/07/1991 | EP0439672A1 Vacuum supply installation |
| 08/07/1991 | CN2082321U Compressor of slide valve rotary piston type |
| 08/06/1991 | US5037282 Rotary screw compressor with oil drainage |
| 08/06/1991 | US5037281 Tip seal for scroll compressor |
| 08/06/1991 | US5037280 Scroll fluid machine with coupling between rotating scrolls |
| 08/06/1991 | US5037279 Scroll fluid machine having wrap start portion with thick base and thin tip |
| 08/06/1991 | US5037278 Scroll compressor with heat insulating and soundproof cover in bottom disposed low pressure chamber |
| 08/01/1991 | DE4002771A1 Vehicle vacuum brake booster connected to carburettor - has rotary vane exhaust cutting in when vacuum is insufficient |
| 07/31/1991 | EP0438892A1 Fuel pumping apparatus |
| 07/31/1991 | CN2081885U Total-enclosed verticle eddy fluid machinery |
| 07/31/1991 | CN1053477A 旋转压缩机 Rotary compressor |
| 07/30/1991 | USRE33652 Electrically driven compressor with a peripheral housing weld |
| 07/30/1991 | US5035590 Double-shaft vacuum pump with synchronization gears |