Combined pump with rotodynamic impeller

Details Combined pump with rotodynamic impeller Combined pump with rotodynamic impeller

2005-10-03

2009-08-25

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

C418S220000, C417S310000, C417S410400

Reexamination Certificate

active

07578663

ABSTRACT:
The combined pump is a novel pumping system for fluids (liquids, gases) and for multiple-phase mixtures. This combined pump comprises a helical rotor on which a rotodynamic impeller is mounted. The helical rotor and impeller turns without touching inside a helical stator, and this helical rotor/impeller assembly and stator are arranged so that the cavities formed move from the suction toward the discharge. Using the rotodynamic impeller, the combined pump provides a pressurized fluid layer between the helical rotor/impeller assembly and the stator under conditions capable of improving the performances and the reliability of the pump.

REFERENCES:
patent: 2553548 (1951-05-01), Canazzi et al.
patent: RE24079 (1955-10-01), Mateer
patent: 3280963 (1966-10-01), Kirker, Jr.
patent: 4030862 (1977-06-01), Larsson
patent: 4948347 (1990-08-01), Fujiwara et al.
patent: 736 434 (1932-11-01), None
patent: 780 791 (1935-05-01), None
patent: 400 508 (1933-10-01), None
patent: 2002-364554 (2003-04-01), None
International Search Report PCT/FR2005/002424; report dated Dec. 13, 2005.

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