Molten metal pump particle passage system

Details Molten metal pump particle passage system Molten metal pump particle passage system

2006-12-05

2006-12-05

Nguyen, Ninh H. (Department: 3745)

Rotary kinetic fluid motors or pumps

With separating means or guard for solid matter in working...

C415S206000, C416S185000, C416S22300B, C416S243000

Reexamination Certificate

active

07144217

ABSTRACT:
A molten metal pump system which includes a particle relief passageway between the vanes on the impeller and the pump base, the particle relief passageway being a predetermined size to allow particles of a predetermined size to pass between the plurality of vanes and the interior walls of the impeller aperture of the pump base. Part or all of the particle relief passageway may, but need not, be as a result of a shoulder on the radially outward end of the plurality of vanes in the inlet side of the impeller.

REFERENCES:
patent: 2294135 (1942-08-01), Smith
patent: 4650342 (1987-03-01), Goodwin
patent: 5470201 (1995-11-01), Gilbert et al.
patent: 5634770 (1997-06-01), Gilbert et al.
patent: 5842832 (1998-12-01), Thut
patent: 5944496 (1999-08-01), Cooper
patent: 6468039 (2002-10-01), Lehman
PCT Application No. WO 98/25031, Applicant and Inventor: Cooper.

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