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US 4,225,288 AGranted
Pump set comprising a liquid ring vacuum pump preceeded by a compressor
AssigneeSiemens Aktiengesellschaft
InventorsKurt Mugele, Bodo Nagel
Life of this patent
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Abstract
A pump set comprising a compressor followed by a liquid ring vacuum pump with the two pumps matched to each other so that a relatively small liquid ring vacuum pump can draw and maintain vacuum under 40 Torr.
Claims3
Apparatus for suctioning off and compressing compressible medium below 100 Torr suction pressure comprising:
- (a) a side channel ring compressor having its input coupled to a space from which the media is to be suctioned off;
- (b) a liquid ring vacuum having its input coupled to the output of said side channel ring compressor, the suction capacity of said liquid ring vacuum pump being designed for the pressure ratio obtainable by said side channel ring compressor.
Dependencies are inferred from the claim text.