Rotary kinetic fluid motors or pumps – Runner has spirally arranged blade or fluid passage – Extending along runner axis
Patent
1988-01-22
1989-05-02
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Runner has spirally arranged blade or fluid passage
Extending along runner axis
415 90, F01D 500
Patent
active
048263940
ABSTRACT:
A turbo-molecular vacuum pump has a high vacuum side and a fore vacuum side in the form of a molecular pump in which the rotor and stator are frusto-conically shaped. The frusto-conically shaped rotor surface has a helical groove. An axial bearing for the rotor is located at an imaginary apex point of the conically-shaped surface of the rotor. The surface of the bearing containing the imaginary apex point is stationary relative to the stator. The rotor and stator are formed of a high heat conductivity material.
REFERENCES:
patent: 3298314 (1967-01-01), Kopczynski
patent: 3697190 (1972-10-01), Haenjens
Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
Garrett Robert E.
Newholm Therese M.
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