Diffusion pumps having an integrated reservoir for the working f

Details Diffusion pumps having an integrated reservoir for the working f Diffusion pumps having an integrated reservoir for the working f

1997-08-28

1999-11-30

Freay, Charles G.

Pumps

One fluid pumped by contact or entrainment with another

Jet

417 77, 417208, F04F 900

Patent

active

059931663

ABSTRACT:
A diffusion pump having a hollow outer body and a heater to heat working fluid that is used in the pump. The hollow outer body includes an outlet for connection to a backing pump and an inlet for communication with the chamber to be evacuated. A sump contains the working fluid and a reservoir for the working fluid surrounds the sump as an integral part of the hollow body. The surrounding reservoir decreases service intervals and reduces heat up and cool down time. The reservoir can be formed of two cylindrical surfaces concentric with the central axis of the pump.

REFERENCES:
patent: 1439810 (1922-12-01), Girdwood
patent: 1501071 (1924-07-01), Snook
patent: 2465590 (1949-03-01), Hickman
patent: 2763246 (1956-09-01), Raskin
patent: 3686474 (1972-08-01), Power
patent: 4201629 (1980-05-01), Buggele

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