| Patents for F04C 25 - Adaptations for special use of pumps for elastic fluids (1,852) |
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| 12/31/1996 | US5588821 Vacuum pump with planetary gear accelerator |
| 12/11/1996 | EP0747596A2 High displacement rate, scrolltype, fluid handling apparatus |
| 11/12/1996 | US5573387 Vacuum pumps |
| 11/06/1996 | CN2239513Y Wet vacuum pump |
| 10/31/1996 | DE19614329A1 Hydraulic machine with rotary slide valve |
| 10/09/1996 | EP0736667A2 Screw rotor and method of generating tooth profile therefor |
| 09/18/1996 | CN2235515Y New structure of impeller of Roots blower or vacuum pump |
| 09/11/1996 | CN2235037Y Self-lubricating vacuum pressure gas pump |
| 08/29/1996 | WO1996026367A1 Pump, particularly vacuum pump, with circular translation cycle |
| 08/29/1996 | WO1996026366A1 Vacuum pump with circular translation cycle |
| 08/28/1996 | EP0728948A1 Scroll vacuum pump |
| 08/28/1996 | EP0728947A1 Scroll vacuum pump |
| 08/27/1996 | US5549463 Composite dry vacuum pump having roots and screw rotors |
| 08/06/1996 | US5542828 Light-gas-isolation, oil-free, scroll vaccum-pump system |
| 08/06/1996 | US5542822 Liquid ring pump and separator container assembly |
| 07/24/1996 | EP0723080A1 Vacuum pumping system |
| 07/09/1996 | US5533887 Fluid rotary apparatus having tapered rotors |
| 06/05/1996 | EP0714482A1 Vacuum pump with oil separator |
| 05/15/1996 | EP0711387A1 Vacuum pump with a gas ballast device |
| 05/15/1996 | EP0711386A1 Oil-sealed vacuum pump |
| 05/15/1996 | EP0711384A1 Two-stage slide vane vacuum pump |
| 05/02/1996 | WO1996012557A1 An arrangement in autoclaving systems |
| 05/01/1996 | EP0708715A1 Heat generation through mechanical molecular agitation |
| 02/29/1996 | DE19530662A1 Schraubenvakuumpumpe Screw vacuum pump |
| 02/28/1996 | EP0698737A1 Method of pumping very low temperature helium gas with a scroll pump |
| 02/21/1996 | EP0697523A2 Screw fluid machine and screw gear used in the same |
| 02/08/1996 | CA2143178A1 Centralizer stops |
| 01/17/1996 | EP0692635A2 Multistage dry compressing vacuum pump and method for its operation |
| 01/03/1996 | EP0690235A2 Method and apparatus for evacuating vacuum system |
| 12/26/1995 | US5478210 Multi-stage vacuum pump |
| 12/13/1995 | EP0630446B1 Oil-sealed vacuum pump |
| 11/22/1995 | EP0683322A2 Pump unit |
| 11/02/1995 | EP0679810A2 Scroll apparatus |
| 09/12/1995 | US5449276 Two stage vacuum pump having different diameter interengaging rotors |
| 08/29/1995 | US5445502 Vacuum pump having parallel kinetic pump inlet section |
| 08/22/1995 | US5443644 Gas exhaust system and pump cleaning system for a semiconductor manufacturing apparatus |
| 08/08/1995 | US5439357 Magnetically guided positive-displacement machine |
| 08/02/1995 | CN1106110A Rotative vacuum pump |
| 07/26/1995 | EP0663986A1 Process for operating a dry-compression vacuum pump |
| 07/19/1995 | EP0663045A1 Method of operating a claw-type vacuum pump, and a claw-type vacuum pump suitable for carrying out the method. |
| 07/19/1995 | CN1105426A Rotative vacuum pump composed of two parts |
| 07/19/1995 | CN1105424A Rotative vacuum pump |
| 06/28/1995 | EP0477331B1 Manual device for generating local under or over pressure |
| 06/20/1995 | US5425626 Scroll type fluid machine with an involute spiral based on a circle having a varying radius |
| 05/30/1995 | US5419689 Vacuum pump having oil-actuated inlet valve |
| 05/23/1995 | US5417551 Housing arrangement for a synchronous plural motor fluid rotary apparatus |
| 03/28/1995 | US5401151 Vacuum pumps |
| 03/08/1995 | EP0641583A1 Installation for the continuous purification of a solvent |
| 03/01/1995 | EP0569424B1 Dry-running vacuum pump |
| 03/01/1995 | CN1099461A Displacement machine with screw rotor pair as function unit |
| 02/23/1995 | WO1995005540A1 Vacuum pump with oil separator |
| 02/09/1995 | WO1995004223A1 Vacuum pump with a gas ballast device |
| 02/09/1995 | WO1995004222A1 Oil-sealed vacuum pump |
| 02/09/1995 | WO1995004221A1 Two-stage slide vane vacuum pump |
| 02/02/1995 | WO1995003186A1 Heat generation through mechanical molecular agitation |
| 01/26/1995 | WO1995002501A1 Compressed-air-operated press for pressing a liquid from materials containing it |
| 01/03/1995 | US5378128 Multi-stage screw vacuum pump |
| 12/20/1994 | US5374170 Screw vacuum pump |
| 11/23/1994 | CN1095455A Rotative fluid equipment |
| 11/15/1994 | US5364245 Dry-running twin-shaft vacuum pump |
| 11/03/1994 | DE4333980C1 Flushing-gas source |
| 10/18/1994 | US5356275 Device for supplying a multi-stage dry-running vacuum pump with inert gas |
| 10/05/1994 | EP0618365A1 Volumetric machine with magnetic driving system |
| 10/04/1994 | US5352097 Vacuum pump |
| 09/20/1994 | US5348448 Fluid rotating apparatus with plural drive motor synchronization system |
| 08/17/1994 | EP0574442B1 Device for supplying a multi-stage dry-running vacuum pump with inert gas |
| 08/16/1994 | US5338167 Dry-running vacuum pump |
| 08/03/1994 | EP0569455B1 Dry-running twin-shaft vacuum pump |
| 08/02/1994 | CA2114601A1 Hinge pin device for a vehicle track having hinged links |
| 07/12/1994 | US5329216 Multi-shaft driving apparatus and fluid rotary apparatus |
| 06/29/1994 | EP0603698A1 Rolling piston vacuum pump |
| 05/24/1994 | US5314320 Screw vacuum pump with a reduced starting load |
| 05/18/1994 | EP0597732A1 Vacuum pump with inlet oil-controlled valve |
| 05/18/1994 | EP0597730A1 Two stage vacuum pump |
| 05/17/1994 | US5312466 Pumping installation for pumping out an enclosure containing gases which are mixed with solid particles or which generate solid condensates or particles |
| 04/28/1994 | WO1994009275A1 Process for operating a dry-compression vacuum pump |
| 04/27/1994 | EP0594461A1 Vacuum pumps |
| 04/14/1994 | WO1994008141A1 Method of operating a claw-type vacuum pump, and a claw-type vacuum pump suitable for carrying out the method |
| 04/14/1994 | DE4234169A1 Verfahren zum Betrieb einer trockenverdichteten Vakuumpumpe sowie für dieses Betriebsverfahren geeignete Vakuumpumpe Method for operating a dry compressed vacuum pump and suitable for this method of operation vacuum pump |
| 04/12/1994 | US5302089 Fluid rotating apparatus |
| 04/07/1994 | DE4233142A1 Verfahren zum Betrieb einer Klauenvakuumpumpe und für die Durchführung dieses Betriebsverfahrens geeignete Klauenvakuumpumpe Method of operating a claw-type vacuum pump and for the implementation of the operating method suitable claw-type vacuum pump |
| 03/22/1994 | US5295798 Fluid rotating apparatus with rotor communicating path |
| 03/17/1994 | DE4330609A1 Rotating piston machine with spiral element design - has spiral body in form of involute with base circle radius to alter involute angle |
| 02/09/1994 | EP0582185A1 Multi-stage screw vacuum pump |
| 12/22/1993 | EP0574442A1 Device for supplying a multi-stage dry-running vacuum pump with inert gas. |
| 12/21/1993 | US5271719 Fluid rotating apparatus and method of controlling the same |
| 11/18/1993 | EP0569455A1 Dry-running twin-shaft vacuum pump. |
| 11/16/1993 | US5261802 Screw vacuum pump |
| 11/02/1993 | US5257913 Hand tool for producing local over or under pressure |
| 10/21/1993 | DE4212623A1 Air rifle - has battery-powered electric motor with gearbox, compressor and electronic circuitry held by in-line housing below barrel |
| 09/30/1993 | WO1993019298A1 Method of operating an oil-sealed vacuum pump |
| 09/16/1993 | DE4208194A1 Verfahren zum betrieb einer oelgedichteten vakuumpumpe sowie fuer die durchfuehrung dieses verfahrens geeignete vakuumpumpe A method of operating a oelgedichteten vacuum pump and for the implementation of this method suitable vacuum pump |
| 08/10/1993 | US5234323 Fluid positive displacement machine with gas injection in the discharge region |
| 05/19/1993 | EP0541989A1 Multi-stage vacuum pumping system |
| 04/07/1993 | EP0535533A1 Screw vacuum pump |
| 03/11/1993 | DE4129897A1 Control for interlinking of multistage vacuum pumps - has connection channel between pump stages with stroke valve, coupled to discharge valve |
| 01/26/1993 | US5181414 Pumping apparatus for pumping a gas by means of an oil-sealed vane pump and application to helium leak detectors |
| 01/20/1993 | EP0523551A1 Screw vacuum pump |
| 01/20/1993 | EP0523550A1 Screw vacuum pump |
| 01/12/1993 | US5178522 Method and apparatus for supplying oil to a vacuum pump |