| Patents for F04C 29 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups (16,981) |
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| 06/22/1982 | US4336001 Solid state compressor control system |
| 06/01/1982 | US4332535 Scroll type compressor having an oil separator and oil sump in the suction chamber |
| 05/26/1982 | EP0052234A1 Scroll type fluid displacement apparatus with oil separating mechanism |
| 05/25/1982 | US4331002 Rotary compressor gas injection |
| 05/18/1982 | US4330240 Rotary compressor with communication between chambers to provide supercharging |
| 05/11/1982 | US4328684 Screw compressor-expander cryogenic system with magnetic coupling |
| 04/28/1982 | EP0050337A1 Sound absorbing arrangement for compressed air producing devices |
| 04/27/1982 | US4326868 Refrigeration system utilizing a gaseous refrigerant bypass |
| 04/13/1982 | CA1121776A1 Compressors |
| 04/07/1982 | EP0049030A1 Sliding vane type rotary compressor |
| 03/24/1982 | EP0048095A1 Pump for heavy gases |
| 03/09/1982 | CA1119568A1 Liquid-injected compressor device |
| 02/23/1982 | USRE30869 Method of operating a refrigeration plant and a plant for performing the method |
| 02/23/1982 | CA1118616A1 Machine parts of powdered metal |
| 02/18/1982 | WO1982000500A1 Rotary compressors |
| 02/16/1982 | US4315719 Non-lubricated rotary pump with discharge through end heads |
| 02/09/1982 | US4314796 Scroll-type compressor with thrust bearing lubricating and bypass means |
| 01/27/1982 | EP0044530A1 Electric pumping aggregate with sliding vane and oil sealing |
| 01/19/1982 | US4311440 Pump |
| 01/13/1982 | EP0043702A2 Scroll-type fluid displacement apparatus with chamber-pressure equalizing means |
| 12/15/1981 | US4305424 Valve assembly |
| 11/24/1981 | CA1113059A1 Lubricating system for pump and control valve therefor |
| 11/17/1981 | US4300875 Positive displacement machine with elastic suspension |
| 11/12/1981 | WO1981003207A1 Rotary compressors |
| 11/11/1981 | EP0039623A1 Improvements in or relating to scroll-type fluid displacement apparatus |
| 10/20/1981 | US4295806 Rotary compressor with wire gauze lubricant separator |
| 10/20/1981 | US4295804 Intermediately cooled air vacuum pump with balancing of the pressures |
| 10/14/1981 | EP0037728A1 Improvements in scroll-type fluid compressors |
| 10/14/1981 | EP0037658A1 Balancing means for a scroll-type fluid displacement apparatus |
| 10/14/1981 | EP0037559A1 Compressor |
| 09/15/1981 | US4289461 Liquid injected compressor with temperature control of liquid |
| 08/26/1981 | EP0034524A2 Rotary compressor |
| 08/11/1981 | US4283167 Cooling structure for an oil sealed rotary vacuum pump |
| 07/28/1981 | US4280799 Compressor with guide baffles and gas-permeable material separating means |
| 07/21/1981 | US4279578 Compact oil separator for rotary compressor |
| 07/21/1981 | CA1105424A1 Vertical axis hermetic rotary helical screw compressor with improved rotary bearings and oil management |
| 07/14/1981 | US4278409 Compressor |
| 07/07/1981 | US4276960 Oil distributing means |
| 06/24/1981 | EP0030636A2 Screw compressor-expander cryogenic system with magnetic coupling |
| 06/24/1981 | EP0030619A1 Rotor compressor, especially screw rotor compressor, with lubricant supply to and drainage thereof from the bearings |
| 06/23/1981 | US4274817 Rotary vane pump with inlet and discharge ports in end sealing plates |
| 06/17/1981 | EP0030275A1 Compressor, especially screw compressor with lubrication circuit |
| 06/16/1981 | US4273515 Liquid ring pump |
| 06/02/1981 | CA1102210A1 Circular cavity discharge valve |
| 05/26/1981 | US4269576 Vane compressor with reticulate or porous separator element and fluid guide means therein |
| 05/19/1981 | US4268230 Gas ballast for oil sealed mechanical vacuum vane pump |
| 04/28/1981 | US4264282 Air compressor apparatus including noise-reducing means |
| 04/21/1981 | US4262492 Airconditioner |
| 04/07/1981 | US4260402 Housing means for defining air/oil separator and oil reservoir assembly |
| 03/31/1981 | US4258821 Sound-absorbent blower cover |
| 03/10/1981 | US4255100 Rotary compressor with valve in rotor |
| 03/10/1981 | US4255099 Oil separator for compressor |
| 03/10/1981 | US4255098 Rotary vane pump assembly |
| 03/03/1981 | US4253805 Rotary compressor |
| 02/03/1981 | USRE30499 Injection cooling of screw compressors |
| 01/20/1981 | US4245968 Lubricating system for pump and control valve therefor |
| 01/13/1981 | US4244680 Rotary vane compressor with oil separating means |
| 01/13/1981 | US4244442 Method and apparatus for treating exhaust gases particularly for air-operated tools |
| 12/30/1980 | US4242065 Sliding vane compressor with end face inserts or rotor |
| 12/30/1980 | US4241758 Pressure valve, especially for rotary piston compressors |
| 12/30/1980 | CA1092571A1 Rotary piston compressor |
| 12/16/1980 | US4239467 Rotary compressor with valved liquid injection through the rotor |
| 11/18/1980 | US4234325 Silencer-separator with internal trap for liquid seal blowers or the like |
| 11/04/1980 | US4231728 Rotary vane pump |
| 11/04/1980 | US4231727 Vacuum producing rotary vane pump with shaft lubrication |
| 10/14/1980 | US4227862 Solid state compressor control system |
| 10/14/1980 | US4227755 Bearing arrangement for shaft of rotary compressor |
| 10/01/1980 | EP0016532A1 Scroll-type fluid compressor unit |
| 09/23/1980 | US4224014 Rotary compressor with liquid injection |
| 08/26/1980 | US4219314 Rolling piston rotary compressor |
| 08/12/1980 | US4216661 Scroll compressor with means for end plate bias and cooled gas return to sealed compressor spaces |
| 08/05/1980 | US4216270 Machine parts of powdered metal |
| 08/05/1980 | US4215977 Pulse-free blower |
| 07/15/1980 | US4212370 Sound absorber for an intermittently discharged gaseous working medium |
| 07/08/1980 | US4211522 Oil-injected rotary compressors |
| 07/08/1980 | CA1081190A1 Rotary fluid pump or compressor |
| 06/25/1980 | EP0012616A1 Scroll-type fluid compressor unit |
| 06/25/1980 | EP0012544A1 Liquid ring pump |
| 06/24/1980 | US4209287 Rotary vane compressor with start-up pressure biasing vanes |
| 06/03/1980 | CA1078799A1 Multistage helical screw compressor with liquid injection |
| 04/22/1980 | US4199309 Circular cavity discharge valve |
| 04/15/1980 | US4198195 Rotary fluid pump or compressor |
| 04/02/1980 | EP0009350A1 Scroll-type fluid compressor units |
| 04/01/1980 | CA1074750A1 Rotary screw compressor and method of operation |
| 03/25/1980 | CA1074272A1 Rotary air compressors |
| 03/18/1980 | CA1073741A1 Fluid-cooled, scroll-type, positive fluid displacement apparatus |
| 02/05/1980 | CA1071024A1 Power transmission |
| 01/29/1980 | US4185949 Screw compressor with bearing unloading means |
| 01/23/1980 | EP0007301A1 Valve |
| 01/23/1980 | EP0007295A2 Liquid-injected compressor device |
| 01/01/1980 | US4181474 Vertical axis hermetic rotary helical screw compressor with improved rotary bearings and oil management |
| 01/01/1980 | US4180986 Refrigeration system on/off cycle |
| 12/25/1979 | US4180089 Thrust piston biasing means |
| 12/18/1979 | US4179248 Oil equalization system for parallel connected hermetic helical screw compressor units |
| 11/20/1979 | CA1066678A1 Rotary compressor |
| 11/14/1979 | EP0005327A1 Gear train for driving a screw compressor with means for speed variation |
| 11/13/1979 | US4174196 Screw fluid machine |
| 11/06/1979 | US4173440 Method and device for lubricating compressors |
| 10/23/1979 | USRE30120 Lobe type pump adjustment |
| 10/16/1979 | US4171188 Rotary air compressors with intake valve control and lubrication system |