| Patents for F04C 18 - Rotary-piston pumps specially adapted for elastic fluids (19,462) |
|---|
| 10/25/1989 | EP0257029B1 A screw-type rotary machine having at least one rotor made of a plastics material |
| 10/24/1989 | US4875842 Axial flow fluid compressor |
| 10/24/1989 | US4875840 Compressor lubrication system with vent |
| 10/24/1989 | US4875838 Scroll compressor with orbiting scroll member biased by oil pressure |
| 10/19/1989 | WO1989009881A1 A method for manufacturing screw rotors |
| 10/19/1989 | DE3810505A1 Oil-flooded screw-type compressor for higher pressures |
| 10/18/1989 | EP0337950A2 Internal axis rotary piston engine |
| 10/18/1989 | CN1005496B Eddy fluid machinery |
| 10/17/1989 | US4874302 Scroll compressor with oil feeding passages in thrust bearing |
| 10/10/1989 | US4872820 Axial flow fluid compressor with angled blade |
| 10/04/1989 | EP0245427B1 Screw rotor compressor and refrigeration plant |
| 10/03/1989 | US4871304 Axial flow fluid compresser |
| 09/27/1989 | EP0258255B1 Method of operating an oil-free rotary gas compressor |
| 09/26/1989 | US4869658 Prevention against shifting of tip seal of scroll compressor |
| 09/26/1989 | CA1259971A1 Scroll type fluid displacement apparatus with improved spiral elements |
| 09/26/1989 | CA1259970A1 Scroll type fluid displacement apparatus with improved anti-wear device |
| 09/21/1989 | WO1989008522A1 Method of machining scroll components |
| 09/20/1989 | CN2044654U Whirl-piece vacuum mini-pump |
| 09/19/1989 | US4867659 Parallel-and external-axial rotary piston blower operating in meshing engagement |
| 09/19/1989 | US4867658 Rotary vane compressor having pressure-biased vanes |
| 09/19/1989 | US4867657 Scroll compressor with axially balanced shaft |
| 09/19/1989 | US4867652 Balanced rolling rotor motor compressor |
| 09/19/1989 | US4867651 Variable capacity vane compressor |
| 09/12/1989 | US4865531 Scroll compressor with super-charging tube |
| 09/12/1989 | US4865530 Scroll-type vacuum apparatus with oil supply to a compression chamber |
| 09/06/1989 | EP0331449A2 Scroll type compressor |
| 09/05/1989 | US4863357 Rotary positive displacement machine for a compressible working fluid |
| 08/29/1989 | US4861372 Roller in rotary compressor and method for producing the same |
| 08/29/1989 | US4861245 Scroll compressor with sealed pressure space biasing the orbiting scroll member |
| 08/29/1989 | US4861244 Spiral displacement machine with concave circular arcs sealingly engaging circular steps |
| 08/29/1989 | US4861235 Variable capacity type compressor |
| 08/22/1989 | US4859163 Rotary pump having vanes guided by bearing blocks |
| 08/22/1989 | US4859159 Spiral compressor with setback portion on radially outer peripheral wall |
| 08/22/1989 | US4859154 Variable-delivery vane-type rotary compressor |
| 08/16/1989 | CN1034790A 涡旋式压缩机 Scroll compressor |
| 08/16/1989 | CN1034788A Axial sliding-vane type compressor |
| 08/15/1989 | US4856973 Scroll-type fluid machine with specific inner curve segments |
| 08/09/1989 | EP0326663A2 Slide-controlled screw rotor machine and supercharged internal-combustion engine equipped therewith |
| 08/02/1989 | EP0326189A1 Scroll type compressor with variable displacement mechanism |
| 08/02/1989 | CN1034413A Scroll machine |
| 07/26/1989 | EP0247061B1 Screw compressor means for lubrication of a rotor bearing |
| 07/25/1989 | US4850815 Variable capacity vane compressor |
| 07/19/1989 | EP0324645A2 Hermetic scroll type compressor |
| 07/19/1989 | EP0323979A1 Rotary machine |
| 07/19/1989 | CN1034042A Fluid compressor |
| 07/12/1989 | EP0323476A1 Rotor for a rotary screw machine. |
| 07/12/1989 | CN2040959U Screw plunger machine |
| 07/11/1989 | US4846642 Rotary piston blower with foamed synthetic material surfaces running along roughened metal surfaces |
| 07/11/1989 | US4846640 Scroll-type vacuum apparatus with rotating scrolls and discharge valve |
| 07/11/1989 | US4846639 Scroll compressor with members pressing rotating scrolls radially and axially |
| 07/11/1989 | US4846633 Variable-capacity scroll-type compressor |
| 07/11/1989 | US4846632 Variable displacement vane 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 |
| 07/04/1989 | US4844703 Air conditioning system for a vehicle |
| 07/04/1989 | US4844044 Torsion damping mechanism for a supercharger |
| 06/29/1989 | DE3841329A1 Vane vacuum pump |
| 06/28/1989 | EP0321782A1 Scroll-type displacement apparatus |
| 06/28/1989 | EP0321781A1 Fluid displacement apparatus with a spiral element |
| 06/27/1989 | US4842501 Device for controlling the internal compression in a screw compressor |
| 06/27/1989 | US4842499 Scroll-type positive displacement apparatus with oil supply to compression chamber |
| 06/27/1989 | US4842494 Refrigerator compressor/internal combustion engine unit of the rotary piston type |
| 06/27/1989 | US4842490 Variable displacement vane compressor |
| 06/21/1989 | EP0320795A2 Vane-type vacuum pump |
| 06/20/1989 | US4840549 Scroll compressor with control of distance between driving and driven scroll axes |
| 06/20/1989 | US4840545 Scroll compressor relief valve |
| 06/15/1989 | DE3840863A1 Internal-shaft rotary-piston compressor |
| 06/13/1989 | US4838936 Cold isostatic pressing; tensile strength; fixed scroll plates |
| 06/13/1989 | US4838773 Scroll compressor with balance weight movably attached to swing link |
| 06/06/1989 | US4836759 Rotary pump with orbiting rotor of harder material than stator |
| 06/06/1989 | US4836758 Scroll compressor with canted drive busing surface |
| 05/31/1989 | EP0318189A2 Scroll machine |
| 05/31/1989 | EP0317900A2 Scroll type compressor |
| 05/31/1989 | CN1033223A Rotor balancing |
| 05/30/1989 | US4834634 Sliding-vane rotary compressor for bearing lubrication |
| 05/30/1989 | US4834633 Scroll machine with wraps of different thicknesses |
| 05/24/1989 | EP0317270A2 Scroll compressor |
| 05/24/1989 | EP0317056A1 Rotor balancing |
| 05/23/1989 | US4832586 Drive assembly with different eccentricities |
| 05/16/1989 | US4830590 Sliding-vane rotary compressor |
| 05/16/1989 | US4830582 Rotary type compressing apparatus employing exhaust gas control valve |
| 05/10/1989 | CN1032842A Compressor for fluids |
| 05/02/1989 | US4826411 Air pump vane assembly |
| 05/02/1989 | US4826409 Closed type rotary compressor with rotating member to prevent back pressure on discharge valve |
| 04/25/1989 | US4824346 Scroll type fluid displacement apparatus with balanced drive means |
| 04/25/1989 | US4824344 Scroll-type compressor with oil passageway in thrust bearing |
| 04/25/1989 | US4824330 Use with automobile air conditioning systems |
| 04/25/1989 | US4823758 Mechanical supercharger |
| 04/20/1989 | WO1989003482A1 Rotary displacement compressor |
| 04/18/1989 | US4822263 Sliding-vane rotary compressor |
| 04/12/1989 | CN1032383A Rotor for rotary screw machine |
| 04/11/1989 | US4819440 Sliding-vane rotary compressor with displacememt-adjusting mechanism, and controller for such variable displacement compressor |
| 04/06/1989 | WO1989002985A1 Rotary piston compressor |
| 04/04/1989 | US4818199 Spiral displacement machine for compressible media with embossed sheet metal seal strip |
| 04/04/1989 | US4818198 Scroll fluid machine with oil feed passages |
| 04/04/1989 | US4818195 Scroll compressor with valved port for each compression chamber |
| 04/04/1989 | US4818189 Variable capacity vane compressor |
| 03/29/1989 | EP0308827A2 Roots type rotary machine |