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 27 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
Patents for F04C 27 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids (2,516)
04/1991
04/17/1991EP0423056A1 Scroll compressor with dual pocket axial compliance
04/10/1991EP0421910A1 Scroll compressor with dual pocket axial compliance
04/02/1991CA1282387C Scroll type fluid compressor with high strength sealing element
03/1991
03/21/1991WO1991003647A1 Improvements in pumps
02/1991
02/19/1991US4993930 Vacuum pump apparatus and shaft sealing device therefor
02/19/1991US4993928 Scroll compressor with dual pocket axial compliance
02/13/1991EP0412634A2 Sealing device for oil rotary vacuum pump
02/12/1991US4992033 Scroll-type machine having compact Oldham coupling
02/12/1991US4992032 Scroll compressor with dual pocket axial compliance
02/05/1991US4990073 Two-cylinder rotary compressor having improved valve cover structure
02/05/1991US4990072 Rotating helical charger with axially movable displacement disk
02/05/1991US4990069 Multi-stage roots vacuum pump with sealing module
01/1991
01/15/1991US4984974 Screw type vacuum pump with introduced inert gas
01/09/1991EP0406873A2 Vacuum pump with security against aeration of recipient at stoppage
12/1990
12/27/1990EP0404512A2 Scroll type fluid displacement apparatus
12/25/1990US4979885 Compressor with sealing means for internal gas and lubricant and having capability of lowering internal gas pressure
12/05/1990EP0400951A1 Axial sealing mechanism for a scroll type compressor
11/1990
11/07/1990EP0395745A1 Pump arrangement in which the pump housing constitutes the pump foundation
11/06/1990US4968232 Axial sealing mechanism for a scroll type compressor
10/1990
10/31/1990EP0394720A1 Pump for displacement of gases and for generation of differential pressure
09/1990
09/25/1990US4958993 Scroll compressor with thrust support means
08/1990
08/01/1990EP0380439A2 Scroll compressor with axial compliancy
07/1990
07/23/1990CA2005935A1 Scroll compressor with axial compliancy
07/03/1990US4938669 Scroll compressor with axial compliancy
06/1990
06/27/1990EP0374798A2 Liquid sealed vane oscillators
06/21/1990CA2005918A1 Liquid sealed vane oscillators
06/20/1990EP0373876A2 Hermetically sealed scroll type refrigerant compressor
06/19/1990US4934912 Sliding-vane rotary compressor with vibration cushioning members
06/19/1990US4934908 Vacuum pump systems
06/13/1990CA2005379A1 Hermetically sealed scroll type refrigerant compressor with a shaft seal mechanism
05/1990
05/29/1990US4928503 Scroll apparatus with pressure regulation
05/22/1990US4927339 Rotating scroll apparatus with axially biased scroll members
05/16/1990EP0368122A1 Multistage Roots vacuum pump
05/15/1990US4925378 Rotary vane compressor with valve controlled pressure biased sealing means
05/08/1990US4923377 Self-machining seal ring leakage prevention assembly for rotary vane device
04/1990
04/03/1990US4913635 Scroll type compressor with sealing structure for fixed scroll end plate
01/1990
01/30/1990US4896890 Oil scavenge check valve apparatus
01/25/1990DE3824426A1 Vane-cell compressor
01/24/1990EP0351690A1 Rotary scroll compressor for compressible fluids
01/03/1990EP0348601A2 Scroll compressor
12/1989
12/12/1989US4886436 Lubricating arrangement for a shaft seal in a vane type compressor
12/05/1989US4884955 Scroll compressor having oil-actuated compliance mechanism
11/1989
11/29/1989CN2048523U Outside mounted permanent magnetic machine double seal device for gear pump
11/15/1989EP0341403A2 Scroll compressor
11/15/1989EP0341402A2 Scroll compressor having oil actuated compliance mechanism
10/1989
10/31/1989US4877382 Scroll-type machine with axially compliant mounting
10/25/1989EP0338835A2 Scroll type compressor
10/24/1989US4875838 Scroll compressor with orbiting scroll member biased by oil pressure
10/18/1989EP0337681A2 Vacuum pump systems
09/1989
09/27/1989EP0258255B1 Method of operating an oil-free rotary gas compressor
09/26/1989US4869658 Prevention against shifting of tip seal of scroll compressor
09/26/1989CA1259970A1 Scroll type fluid displacement apparatus with improved anti-wear device
09/21/1989WO1989008782A1 Pump arrangement in which the pump housing constitutes the pump foundation
08/1989
08/29/1989US4861245 Scroll compressor with sealed pressure space biasing the orbiting scroll member
07/1989
07/11/1989US4846642 Rotary piston blower with foamed synthetic material surfaces running along roughened metal surfaces
07/11/1989US4846639 Scroll compressor with members pressing rotating scrolls radially and axially
07/05/1989EP0322894A2 Scroll compressor
07/04/1989US4844702 Lubrication circuit of rotary vacuum pumps
06/1989
06/27/1989US4842494 Refrigerator compressor/internal combustion engine unit of the rotary piston type
06/21/1989EP0320956A2 Screw type vacuum pump
06/20/1989US4840549 Scroll compressor with control of distance between driving and driven scroll axes
06/14/1989CN1004501B Controllable sealing washer for triangle-like rotary piston engine
05/1989
05/30/1989US4834634 Sliding-vane rotary compressor for bearing lubrication
05/10/1989EP0314819A1 Two-shaft vacuum pump with at least one connecting passage between the bearing spaces
04/1989
04/25/1989US4824343 Scroll-type fluid transferring machine with gap adjustment between scroll members
03/1989
03/21/1989US4813857 Roots blower
02/1989
02/14/1989US4804317 Rotary vane pump with floating rotor side plates
01/1989
01/12/1989DE3721978A1 Rotating piston machine
12/1988
12/20/1988CA1247160A1 Floating seal for closing a cavity
12/20/1988CA1247159A1 Shaft seal
11/1988
11/29/1988US4787831 Dual seal system for roots blower
11/22/1988US4786241 Radial seal of a rotary piston engine
11/01/1988US4781553 Screw vacuum pump with lubricated bearings and a plurality of shaft sealing means
10/1988
10/12/1988EP0286341A2 Scroll type compressor
09/1988
09/20/1988US4772188 Scroll compressor with oil grooves in thrust bearing
08/1988
08/30/1988US4767293 Scroll-type machine with axially compliant mounting
08/10/1988EP0277924A2 Improvement to the lubrication circuit of rotary vacuum pumps
08/02/1988CA1239911A1 Dual seal system for roots blower
07/1988
07/19/1988US4758138 Oil-free rotary gas compressor with injection of vaporizable liquid
06/1988
06/28/1988US4753583 Scroll type fluid compressor with high strength sealing element
06/28/1988US4753582 Scroll compressor with control of distance between driving and driven scroll axes
05/1988
05/31/1988US4747752 Sealing and dynamic operation of a liquid ring pump
05/18/1988EP0267559A1 Rotary piston blower
05/10/1988US4743184 Rotary compressor with heating passage between discharge chamber and shaft seal
04/1988
04/26/1988US4740143 Scroll-type fluid transferring machine with gap adjustment between scroll members
04/05/1988US4735559 Scroll-type vacuum pump with oil seal between suction and discharge chambers
03/1988
03/23/1988CN86100403B Rotative piston type hydraulic motor
03/09/1988EP0258255A1 Method of operating an oil-free rotary gas compressor.
03/09/1988CN86105975A Controllable sealing washer for triangle-like rotary piston engine
03/09/1988CN85109446B Axial sealing mechanism for a scoll compressor
02/1988
02/25/1988DE3727986A1 Compacting machine compressing fluid e.g. refrigeration compressor
12/1987
12/08/1987US4711620 Moving vane type compressor
11/1987
11/12/1987DE3619645A1 Bearing arrangement for a rotary piston ventilator with an external axis
10/1987
10/28/1987EP0242429A2 Filtration device for oils
10/20/1987US4701115 Axial sealing mechanism for a scroll compressor
10/01/1987DE3609996A1 Screw-type compressor
09/1987
09/29/1987CA1227519A1 Rotor-shaft bearing apparatus for movable vane compressors
08/1987
08/26/1987EP0107691B1 Seal for rotary piston pump
08/13/1987DE3604206A1 Dry-running slide vane rotary vacuum pump
08/05/1987CN86100403A Rotative piston type hydraulic motor
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