| Patents for F04C 25 - Adaptations for special use of pumps for elastic fluids (1,852) |
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| 10/28/1987 | EP0242429A2 Filtration device for oils |
| 09/23/1987 | EP0237734A2 Screw vacuum pump unit |
| 06/30/1987 | US4676075 Scroll-type compressor for helium gas |
| 05/27/1987 | EP0223251A2 Use of perfluoropolyethers in mechanical pumps |
| 05/12/1987 | US4664601 Operation control system of rotary displacement type vacuum pump |
| 04/14/1987 | US4657487 Vacuum generating apparatus including liquid ring pump, pre-separator, two heat exchangers and fine separator |
| 04/08/1987 | EP0217128A1 Motor pump unit with vanes without external oil leakage |
| 04/07/1987 | US4655800 Adsorption of chlorine containing gases |
| 04/07/1987 | US4655688 Control for liquid ring vacuum pumps |
| 03/24/1987 | US4652214 Seal arrangement for an oil-sealed rotary vacuum pump |
| 01/20/1987 | US4637780 Water ring vacuum pump having adjustable part plates and a hollow impeller |
| 11/11/1986 | US4621985 High vacuum apparatus |
| 10/29/1986 | EP0198936A1 Multistage vacuum pump |
| 10/08/1986 | CN85201793U Wall-male stator in two-pole rotary piece vacuum pump |
| 09/02/1986 | US4609335 Supercharger with reduced noise and improved efficiency |
| 07/23/1986 | CN85101185A 螺旋型真空泵 Spiral vacuum pump |
| 07/09/1986 | EP0186776A1 Apparatus for the production of a vacuum |
| 06/10/1986 | CN85106797A Process for production of vacuum |
| 05/13/1986 | US4588504 Oil circuit coupler for an oil-sealed vacuum pump |
| 04/09/1986 | EP0176828A1 Oil-sealed vacuum pump |
| 04/02/1986 | EP0176270A2 Supercharger with reduced noise and improved efficiency |
| 03/11/1986 | US4575322 Oil-sealed vane pump |
| 01/29/1986 | EP0169336A1 Control and actuation system, especially for water ring vacuum pumps |
| 01/28/1986 | US4566869 Reversible multi-vane rotary compressor |
| 01/15/1986 | EP0168138A1 Water ring vacuum pump |
| 12/10/1985 | US4557678 Pump device |
| 11/27/1985 | EP0162434A2 Antisuckback device for rotary piston pumps |
| 10/29/1985 | CA1195964A1 Compressor |
| 06/19/1985 | EP0144888A2 Oil-sealed vane pump |
| 11/20/1984 | US4483667 Vacuum pump and method of operating the same |
| 07/10/1984 | US4459090 Rotary type compressor for automotive air conditioners |
| 05/01/1984 | CA1166613A1 Vacuum pump |
| 04/10/1984 | US4441863 Variable discharge rotary compressor |
| 01/31/1984 | US4428195 Rotary vacuum pump |
| 07/27/1983 | EP0084085A1 Vacuum pump with a suction branch valve, and method for its operation |
| 11/10/1982 | EP0064356A1 A compressor |
| 06/22/1982 | US4336004 Movable end plate for a vacuum pump |
| 01/19/1982 | US4311440 Pump |
| 07/08/1981 | EP0031758A2 Vacuum pump, particularly for diesel engines |
| 06/30/1981 | US4276005 Oil flow metering structure for oil sealed mechanical vacuum vane pump |
| 05/19/1981 | US4268230 Gas ballast for oil sealed mechanical vacuum vane pump |
| 09/30/1980 | US4225288 Pump set comprising a liquid ring vacuum pump preceeded by a compressor |
| 08/14/1979 | US4164384 Rotary vane vacuum pump with filter means for inlet |
| 06/26/1979 | CA1057251A1 Motor-driven liquid-ring pump including a liquid separator |
| 10/31/1978 | US4123201 Modular vacuum pump assembly |
| 09/05/1978 | CA1037927A1 Liquid ring compressor |
| 06/06/1978 | US4093397 High vacuum pump |
| 04/11/1978 | US4083659 Motor-driven liquid-ring pump including a liquid separator |
| 11/08/1977 | US4057368 Base frame construction for a liquid ring compressor set |
| 10/18/1977 | US4054401 Vacuum pump with lubricant control system to interrupt lubricant flow upon loss of pump pressure |
| 05/24/1977 | US4025242 Vacuum pump oiling |
| 08/10/1976 | US3973879 Liquid ring compressor |