Rotary kinetic fluid motors or pumps – Smooth runner surface for working fluid frictional contact
Reexamination Certificate
2008-09-19
2011-12-06
Paumen, Gary F. (Department: 2833)
Rotary kinetic fluid motors or pumps
Smooth runner surface for working fluid frictional contact
Reexamination Certificate
active
08070418
ABSTRACT:
A vacuum pump includes a gas inlet, a quick-rotatable rotor connectable with a flange of a multi-chamber vacuum installation which flange has a plurality of suction openings separated by separation walls, and a gas path separating structure which is located in the gas inlet of the pump, dividing the gas inlet in suction regions, and which seals, together with the separation walls, chambers of the multi-chamber vacuum installation.
REFERENCES:
patent: 4057369 (1977-11-01), Isenberg et al.
patent: 4116592 (1978-09-01), Cherny et al.
patent: 5893702 (1999-04-01), Conrad et al.
patent: 6705830 (2004-03-01), Yamashita et al.
patent: 2008/0056886 (2008-03-01), Hablanian
Abelman ,Frayne & Schwab
Paumen Gary F.
Pfeiffer Vacuum GmbH
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