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2. Rotary vane pump - Wikipedia

   en.wikipedia.org/wiki/Rotary_vane_pump

   An eccentric rotary vane pump Another eccentric rotary-vane pump design. Note that modern pumps have an area contact between rotor and stator (and not a line contact). 1. pump housing 2. rotor 3. vanes 4. spring. A rotary vane pump is a type of positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In ...

3. Vacuum pump - Wikipedia

   en.wikipedia.org/wiki/Vacuum_pump

   The Roots blower is one example of a vacuum pump. A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity. [1]

4. Rotary compression pump - Wikipedia

   en.wikipedia.org/wiki/Rotary_compression_pump

   A rotary compression pump works in cycles. Over each cycle a volume is created in contact with the chamber where pressure is to be lowered. By random motion, molecules from the vacuum chamber pass into the volume created by the pump. This volume is then cut off from the chamber and compressed in contact with a one way valve.

5. Turbomolecular pump - Wikipedia

   en.wikipedia.org/wiki/Turbomolecular_pump

   The system is an axial compressor that puts energy into the gas, rather than a turbine, which takes energy out of a moving fluid to create rotary power, thus "turbomolecular pump" is a misnomer. Gas captured by the upper stages is pushed into the lower stages and successively compressed to the level of the fore-vacuum (backing pump) pressure.

6. Hydraulic pump - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_pump

   Fixed displacement vane pump. A rotary vane pump is a positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In some cases these vanes can have variable length and/or be tensioned to maintain contact with the walls as the pump rotates.

7. Pump - Wikipedia

   en.wikipedia.org/wiki/Pump

   Screw pumps – the shape of the internals of this pump is usually two screws turning against each other to pump the liquid; Rotary vane pumps; Hollow disc pumps (also known as eccentric disc pumps or hollow rotary disc pumps), similar to scroll compressors, these have an eccentric cylindrical rotor encased in a circular housing. As the rotor ...