Vacuum pumping system

A vessel is evacuated and a vacuum maintained by a first, radial, pump and throttle valve and a second, rotary piston, pump in a pipe parallel, and connected, to that for the first pump. Control valves enable the first pump to extract at higher pressure and the second at lower pressure. The vessel (...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	AMLINGER, HEINRICH
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING HEATING LIGHTING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS 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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