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 25 - Adaptations for special use of pumps for elastic fluids
Patents for F04C 25 - Adaptations for special use of pumps for elastic fluids (1,852)
02/2004
02/10/2004US6688864 Oil leak prevention structure of vacuum pump
02/10/2004US6688863 Oil leak prevention structure of vacuum pump
02/04/2004CN2602192Y Vehicle-mounted vacuum pump
02/04/2004CN1472440A Fluid conveying system and method
01/2004
01/06/2004US6672855 Vacuum pumps
12/2003
12/31/2003CN2596071Y High vacuum degree and energy-saving type vacuum pump
12/31/2003CN1464198A Air blast cooling rotary vane roller pump
12/23/2003US6666672 Drive mechanism for a screw pump
12/16/2003US6663367 Shaft seal structure of vacuum pumps
12/09/2003US6659747 Shaft seal structure of vacuum pumps
12/09/2003US6659746 Shaft seal structure of vacuum pumps
12/04/2003WO2003100258A1 Dual-shaft vacuum pump
12/03/2003CN1459570A Metering pump used for transporting molten metal
12/02/2003US6655938 Screw-type dry vacuum pump having an enlarged casing portion
12/02/2003US6655937 Plastic vane for a vane-cell vacuum pump
11/2003
11/26/2003EP1363719A2 Oil separator for pumps overflowing with oil
11/20/2003US20030215347 Blowing device for removing wooden powder
11/18/2003US6648619 Vacuum pump
11/13/2003WO2003093678A1 Vacuum pump and method for generating sub-pressure
11/13/2003US20030210986 Diffusion pumps
11/12/2003EP1361365A2 Vacuum pump and plastic rotor
11/11/2003US6644931 System for pumping low thermal conductivity gases
11/04/2003US6641370 Vacuum pump apparatus having improved sealing structure
10/2003
10/28/2003US6638040 Dry vacuum pump
10/08/2003CN2578565Y Vane rotary plunger pump with forced air cooling
10/02/2003WO2003081048A1 Eccentric pump and method for operation of said pump
10/02/2003US20030185696 Vacuum pump
10/01/2003CN1446291A Two-shaft vacuum pump
10/01/2003CN1445459A 真空泵 Vacuum pump
10/01/2003CN1445458A Dry-type spiral vacuum pump
10/01/2003CN1445457A Dry-type spiral vacuum pump
09/2003
09/30/2003US6626646 Vehicle mounted gas well pumping unit
09/25/2003US20030180169 Rotary compressor for vehicle
09/25/2003US20030180153 Vacuum pump
09/24/2003EP1347176A2 Vacuum pump
09/24/2003CN1444700A Twin screw rotors and displacement machines containing the same
09/17/2003CN2573729Y Vacuum pump for milking machine
09/12/2003WO2003033761A3 Multi-chamber installation for treating objects under vacuum, method for evacuating said installation and evacuation system therefor
09/10/2003CN2572052Y Oilless, low-noise vacuum pump for dentistry
09/10/2003CN2572051Y High-vacuum energy-saving slide valve vacuum pump
09/10/2003CN2572050Y Single-cylinder agricultural vehicle brake boosted vacuum pump
09/03/2003EP1339608A1 Device for emptying a food storage container which can be sealed by means of a valve
09/03/2003EP1108143B1 Dry-compressing screw pump
09/03/2003CN1120301C Terminal sealing device for vortex vacuum pump and vortex vacuum pump therewith
08/2003
08/28/2003WO2003071134A1 Vacuum pump
08/20/2003EP1336762A1 Improvements in diffusion pumps
08/20/2003EP0988453B1 Screw spindle vacuum pump and operating method
08/14/2003US20030152475 Twin screw rotors and displacement machines containing the same
08/14/2003US20030152468 Vacuum pump with two co-operating rotors
08/07/2003US20030147764 Screw vacuum pump with a coolant circuit
07/2003
07/29/2003US6599097 Dry vacuum pump with improved gas discharging speed and pump cooling
07/23/2003CN2561965Y Casing and basement structure of multi-stage compressor or vacuum pump
07/17/2003US20030133817 Multi-stage vacuum pump
07/17/2003US20030133809 Hybrid compressor apparatus
07/16/2003EP1327078A1 Multi-stage helical screw rotor
07/08/2003US6589033 Unitary sliding vane compressor-expander and electrical generation system
07/03/2003US20030124011 Dry vacuum pump
07/02/2003EP1322864A1 Plastic vane for a vane-cell vacuum pump
06/2003
06/25/2003CN2557725Y Melted metal conveying pump
06/03/2003US6572351 Pressure seal for a vacuum pump
05/2003
05/30/2003WO2003044369A1 Vacuum pumps
05/28/2003CN1420600A AC generator with vacuum pump capable of enhancing cooling property
05/22/2003WO2003042542A1 Tempering method for a screw-type vacuum pump
05/22/2003WO2003042541A1 Cooled screw-type vacuum pump
05/22/2003US20030094815 Alternator having vacuum pump capable of improving cooling characteristic
05/22/2003CA2463957A1 Cooling method for a screw-type vacuum pump
05/22/2003CA2463617A1 Cooled screw-type vacuum pump
05/21/2003EP1313200A2 Alternator having vacuum pump capable of improving cooling characteristic
05/21/2003EP1311763A1 Pressure seal for a vacuum pump
05/20/2003CA2274413C Rotary compressor with vane body immersed in lubricating fluid
05/14/2003CN1417479A Special rotary-vane vacuum pump
05/07/2003EP1307657A1 Two-shaft vacuum pump
05/01/2003WO2003036089A1 Enclosed mechanical booster
04/2003
04/30/2003CN1415055A Screw vaccum pump with coolant circuit
04/29/2003US6554594 Shaft seal structure for vacuum pump
04/24/2003WO2003033761A2 Multi-chamber installation for treating objects under vacuum, method for evacuating said installation and evacuation system therefor
04/24/2003US20030077182 Multi-stage vacuum pump
04/24/2003US20030077181 In-line gas compression system
04/23/2003EP1303702A1 Twin screw rotors and displacement machines containing the same
04/17/2003WO2003031821A1 Screw type vacuum pump
04/17/2003WO2003031820A1 Vacuum pump
04/08/2003US6544020 Cooled screw vacuum pump
03/2003
03/27/2003US20030059328 Bacterial growth inhibition in a circulation system comprising a compressor
03/26/2003CN1103872C Cooling device for oil-sealed rotary vacuum pump
03/20/2003US20030053924 Plastic vane for a vane-cell vacuum pump
03/20/2003DE20121634U1 Multiple chamber plant used for degassing, coating or etching substrates comprises an evacuating system connected to chambers
03/19/2003CN1404555A Plastic vane for a vane-cell vacuum pump
02/2003
02/26/2003CN1399076A 真空泵 Vacuum pump
02/26/2003CN1399075A Spiral rotor-type wet vacuum pump
02/26/2003CN1399074A 干式真空泵 Dry vacuum pump
02/20/2003US20030035731 Dry vacuum pump
01/2003
01/29/2003CN1100209C Double roll and dry type scroll vacuum pump
01/28/2003US6511308 Scroll vacuum pump with improved performance
01/23/2003US20030017070 Compressor incorporated with motor and its cooling jacket
01/22/2003CN2532276Y High-speed slide piece vacuum pump
01/15/2003EP1274942A1 Vacuum pump with two co-operating rotors
01/09/2003US20030007881 Oil leak prevention structure of vacuum pump
01/08/2003EP1273801A2 Sealing for vacuum pump
01/08/2003CN1389648A 真空泵 Vacuum pump
01/02/2003US20030003008 Oil leak prevention structure of vacuum pump
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