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US 2003/0147744 A1Published application
Molten metal pump particle passage system
AssigneePyrotek, Inc.
InventorsRonald E. Gilbert, Mark A. Palmer
Life of this patent
Estimating the term…
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.
Claims4
A molten metal pump system comprising:
- a pump framework;
- a pump motor mounted on the pump framework;
- a pump base attached to the pump framework, the pump base including an impeller aperture with interior walls;
- an impeller shaft attached to the pump motor;
- an impeller body attached to the impeller shaft and at least partially within the impeller aperture in the pump base, the impeller body comprising:
- a center portion with a shaft aperture therein;
- a plurality of vanes extending outward from the center portion, each vane including a radially outward end, an input side, and an output side;
- and
- wherein a particle relief passageway is defined between the radially outward end of the plurality of vanes on the impeller and the interior walls of the impeller aperture, 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.
6 more elements
A molten metal pump system comprising:
- a pump framework;
- a pump motor mounted on the pump framework;
- a pump base attached to the pump framework, the pump base including an impeller aperture with interior walls;
- an impeller shaft attached to the pump motor;
- an impeller body attached to the impeller shaft and at least partially within the impeller aperture in the pump base, the impeller body comprising:
- a center portion with a shaft aperture therein;
- a plurality of vanes extending outward from the center portion, each vane including a radially inward end, a radially outward end, an input side, an output side, a leading surface, a trailing surface, a vane width between the leading surface and the trailing surface;
- the plurality of vanes being tapered at the input side from the radially inward end to the radially outward end, thereby creating a shoulder on the radially outward end of the plurality of vanes;
- and
- wherein a predetermined particle relief passageway is defined between the plurality of vanes on the impeller, the predetermined partial relief passageway being sized 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.
7 more elements
Dependencies are inferred from the claim text.