Pumps – One fluid pumped by contact or entrainment with another – Jet
Patent
1976-12-06
1978-04-25
Freeh, William L.
Pumps
One fluid pumped by contact or entrainment with another
Jet
F04C 1900
Patent
active
040860310
ABSTRACT:
A diffusion pump is provided in which an internal vacuum chamber is surrounded by regions of the pump through which working vapors flow. This configuration enables a single heating unit to heat both the working fluid of the pump and the vacuum chamber.
In certain embodiments, a differential pump is provided in which a common boiler provides working fluid for a pair of pumping sections, each of which evacuates a different vacuum chamber. Application of this pump to a gas chromatograph/mass spectrometer system permits operation with relatively large gas throughput while maintaining a relatively low pressure chamber for the mass spectrometer ion source and a much lower pressure chamber for the mass analyzer.
Freeh William L.
Grubman Ronald E.
Hewlett--Packard Company
Look Edward
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