Pumps – Electrical or getter type – Ionic with gettering
Patent
1995-10-10
1998-03-17
Thorpe, Timothy
Pumps
Electrical or getter type
Ionic with gettering
417 50, F04B 3702, F04F 1100
Patent
active
057279292
ABSTRACT:
An exhaust apparatus and a high vacuum pumping unit including such high vacuum device and an auxiliary vacuum pump are disclosed, wherein a high vacuum is achieved in a vacuum vessel such that the gas molecules within the vacuum vessel are ionized and accelerated to be exhausted and, further, in the high vacuum pumping unit, those gas molecules diffused back or desorbed from the vacuum pump are ionized and accelerated to be returned to the vacuum pump.
REFERENCES:
patent: 2460175 (1949-01-01), Hergenrother
patent: 2578009 (1951-12-01), Linder
patent: 2893624 (1959-07-01), Fricke
patent: 3100274 (1963-08-01), Luftman et al.
patent: 3239133 (1966-03-01), Noller
patent: 4389165 (1983-06-01), Ono et al.
"Hot-Cathode Magnetron Ionization Gauge for the Measurement of Ultrahigh Vacua*" by Lafferty; Dec. 5, 1960.
Hayashi Hideaki
Nagai Kazutoshi
Satake Tohru
Yasui Takanari
Ebara Corporation
Thai Xuan M.
Thorpe Timothy
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