Patents for F04C 23 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids (6,201) |
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04/10/1991 | EP0420899A1 Multi-stage vacuum-pump set |
04/10/1991 | EP0420853A1 Vacuum pump unit arranged on a transportable support frame |
04/09/1991 | US5006051 Rotary two-cylinder compressor with delayed compression phases and oil-guiding bearing grooves |
03/27/1991 | CN1012201B Scroll compressor |
03/26/1991 | US5002470 Internal stator rolling rotor motor driven scroll compressor |
03/19/1991 | US5000669 Hermetic scroll type compressor having two section chambers linked by inclined oil passage |
02/27/1991 | CN1011811B Scroll type compressor |
02/26/1991 | US4995796 Multi-section roots vacuum pump of reverse flow cooling type |
02/26/1991 | US4995789 Enclosed type electric compressor |
02/19/1991 | US4993929 Scroll machine with lubricated thrust surfaces |
02/13/1991 | EP0412948A2 Quick disassembly system for rotary vacuum pumps |
02/12/1991 | US4992033 Scroll-type machine having compact Oldham coupling |
02/05/1991 | US4990073 Two-cylinder rotary compressor having improved valve cover structure |
01/23/1991 | EP0409287A1 Vacuum pump with displacement space |
12/19/1990 | EP0403239A2 Capacity controllable compressor apparatus |
12/19/1990 | EP0402577A1 Compressor mounting apparatus |
12/12/1990 | EP0401968A2 A rotary compressor |
12/12/1990 | EP0401741A1 Two stage primary dry pump |
12/06/1990 | DE4016014A1 Sliding vane vacuum pump - has outlet valve mounted in plane of joint face of rotor housing |
12/04/1990 | USRE33473 Oil feeding device for scroll fluid apparatus |
11/20/1990 | US4971529 Twin rotary compressor with suction accumulator |
11/06/1990 | US4968232 Axial sealing mechanism for a scroll type compressor |
11/06/1990 | US4968228 Housing for horizontal rolling piston rotary compressor |
10/23/1990 | US4964786 Compressor mounting apparatus |
10/23/1990 | US4964609 Compressor mounting apparatus |
10/02/1990 | US4960371 Rotary compressor for heavy duty gas services |
09/27/1990 | DE3909831A1 Sliding-vane rotary pump designed for dry running, and method for manufacturing it |
09/25/1990 | US4958993 Scroll compressor with thrust support means |
09/25/1990 | CA1274495A1 Rotary compressor with vane slot pressure groove |
09/25/1990 | CA1274494A1 Rotary compressor lubrication arrangement |
09/18/1990 | US4957417 Vertical oilless screw vacuum pump |
09/18/1990 | US4957283 Vacuum system for feeding sheets |
09/04/1990 | US4954057 Scroll compressor with lubricated flat driving surface |
08/16/1990 | EP0381790A1 Method and device for the compression of a gaseous medium |
08/01/1990 | EP0380439A2 Scroll compressor with axial compliancy |
07/25/1990 | EP0379011A2 Pumping unit |
07/24/1990 | US4943215 Multistage vacuum pump with bore for fouling removal |
07/23/1990 | CA2005935A1 Scroll compressor with axial compliancy |
07/11/1990 | CN1008760B Hermetically sealed rotary compressor |
07/10/1990 | US4940398 Twin-shaft, multiple-stage vacuum pump with the shafts vertically disposed |
07/10/1990 | US4940396 Hermatic scroll type compressor with two casings and center blocks |
07/03/1990 | US4938669 Scroll compressor with axial compliancy |
06/26/1990 | US4936757 Multi-section vacuum pump |
06/26/1990 | US4936756 Hermetic scroll type compressor with refrigerant fluid flow through the drive shaft |
06/26/1990 | CA1270696A1 Combined fluidizing and vacuum pump |
06/19/1990 | USRE33236 Bearing device of sealed type scroll compressor |
06/19/1990 | US4934910 Scroll-type fluid apparatus with radially compliant driving means |
06/19/1990 | US4934908 Vacuum pump systems |
06/13/1990 | CN1008389B Compressor |
06/12/1990 | US4932211 Internal combustion engine charging unit |
06/06/1990 | CN2057969U Automotive double-shaft air pump |
05/29/1990 | US4929160 Scroll compressor having exhausting pipe pressed into muffler chamber under pressure |
05/22/1990 | US4926642 Internal combustion engine charging unit |
05/16/1990 | EP0368124A1 Multistage Roots pump and its assembly method |
05/08/1990 | CA1268748A1 Liquid ring vacuum pump arrangement having minimized operating liquid consumption |
04/25/1990 | EP0365132A2 Scroll compressor |
04/19/1990 | WO1990004107A1 Machine for a gaseous medium |
04/12/1990 | DE3932862A1 Hermetic seal construction for coolant in domestic refrigerator - features rotary piston in coolant compressor divided into three regions with different functions |
04/11/1990 | EP0362865A2 Multi-section vacuum pump |
04/10/1990 | US4915554 Hermetic rotary compressor with balancing weights |
03/28/1990 | EP0360048A2 Installation for producing transport air |
03/27/1990 | US4911620 Scroll compressor top cover plate |
03/21/1990 | EP0359423A2 Multi-section roots vacuum pump of reverse flow cooling type |
03/08/1990 | DE3828608A1 Vacuum-pump device |
02/21/1990 | CN2053260U Compressor with ring body |
02/13/1990 | US4900238 Scroll type compressor with releasably secured hermetic housing |
01/17/1990 | EP0350524A1 Multiple gear shift assembly for rotary vacuum pumps |
01/09/1990 | US4893044 Rotor balancing |
01/04/1990 | DE3921423A1 Compression device having an outer housing with a double weld layer, and method for welding an outer housing and a compression unit |
01/03/1990 | EP0349170A2 Supercharger with torsion damping mechanism |
01/03/1990 | EP0348936A2 A scroll gas compressor |
01/03/1990 | EP0348601A2 Scroll compressor |
12/28/1989 | WO1989012751A1 Multi-stage vacuum-pump set |
12/27/1989 | EP0347706A1 Multistage vacuum pump unit |
12/26/1989 | US4889475 Twin rotary compressor with suction accumulator |
12/14/1989 | WO1989012169A1 Vacuum pump unit arranged on a transportable support frame |
12/14/1989 | DE3819692A1 Dry-running slide vane rotary vacuum pump |
12/12/1989 | US4886435 Scroll compressor with intermittent oil supply passage |
12/12/1989 | US4886434 Scroll compressor having discharge part communicating with two compression spaces simultaneously |
12/12/1989 | US4886427 Hermetic scroll compressor with passage group for discharged fluid |
12/05/1989 | US4884955 Scroll compressor having oil-actuated compliance mechanism |
11/21/1989 | US4881879 Rotary compressor gas routing for muffler system |
11/15/1989 | EP0341407A2 Scroll compressor top cover plate |
11/15/1989 | EP0341402A2 Scroll compressor having oil actuated compliance mechanism |
11/01/1989 | CN1005642B Process for production of vaccum |
10/31/1989 | US4877382 Scroll-type machine with axially compliant mounting |
10/25/1989 | EP0338835A2 Scroll type compressor |
10/18/1989 | EP0337681A2 Vacuum pump systems |
10/05/1989 | DE3809929A1 Liquid ring vacuum pump |
09/20/1989 | EP0332741A1 Multistage vacuum pump |
09/19/1989 | US4867657 Scroll compressor with axially balanced shaft |
09/19/1989 | US4867652 Balanced rolling rotor motor compressor |
09/12/1989 | US4865531 Scroll compressor with super-charging tube |
08/16/1989 | CN1034790A 涡旋式压缩机 Scroll compressor |
08/08/1989 | US4854831 Scroll compressor with plural discharge flow paths |
07/19/1989 | EP0324645A2 Hermetic scroll type compressor |
07/06/1989 | DE3842886A1 Vacuum pump stand |
07/05/1989 | EP0322894A2 Scroll compressor |
07/05/1989 | EP0322561A2 Hermetic compressor assembly |
07/05/1989 | EP0322531A2 Rotary compressor gas routing for muffler system |