Vacuum pump having a rotor supported in the interior of its casi

Details Vacuum pump having a rotor supported in the interior of its casi Vacuum pump having a rotor supported in the interior of its casi

1974-07-22

1977-11-08

Freeh, William L.

Pumps

Motor driven

Axial thrust balancing means for rotary pump and motor

308 10, 415 90, 415101, 415107, 417423R, F04B 1700

Patent

active

040573699

ABSTRACT:
The present invention relates to magnetic support of the rotor structure in vacuum pumps, particularly turbomolecular pumps. This magnetic support eliminates the requirements for bearing lubricants, and the consequent degradation of the vacuum to be produced by lubricant vapors.

REFERENCES:
patent: 2700343 (1955-01-01), Pezzillo
patent: 2856239 (1958-10-01), Dacus
patent: 3066849 (1962-12-01), Beams
patent: 3146038 (1964-08-01), Lautzenhiser
patent: 3155437 (1964-11-01), Kinsey et al.
patent: 3184271 (1965-05-01), Gilinson
patent: 3199932 (1965-08-01), Clark
patent: 3536418 (1970-10-01), Breaux
patent: 3668393 (1972-06-01), VonRauch
patent: 3678765 (1972-07-01), Feldman
patent: 3759626 (1973-09-01), Becker
patent: 3771909 (1973-11-01), Rousseau et al.
patent: 3778122 (1973-12-01), Doll et al.
patent: 3823990 (1974-07-01), Gilinson

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