Novel rotary-vane type vacuum pump preventing oil return

The utility model relates to the technical field of pumps, in particular to a novel rotary-vane type vacuum pump preventing oil return. The vacuum pump is characterized by comprising an air intake, a filter screen, an oil baffle sealing ring, an air intake O-shaped sealing ring, a rotary-vane spring...

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Bibliographische Detailangaben
Hauptverfasser:	ZENG HONGGE, HU TAO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING HEATING LIGHTING MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS WEAPONS
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