Molten metal impeller
First Claim
1. An impeller for a molten metal pump having a cylindrical body comprised of a refractory material, said cylindrical body including opposed top and bottom surfaces, said cylindrical body further including a bearing element, a means being provided in said top surface for mating with a shaft, a plurality of circumferentially spaced passages extending from said top or bottom surface to a sidewall of said impeller, each of said passages being separate and having an inlet opening in said top or bottom surface and an outlet opening in said sidewall.
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Accused Products
Abstract
An impeller for a molten metal pump having a cylindrical body comprised of a refractory material. The cylindrical body includes generally coplanar top and bottom surfaces. A central bore is provided in the top surface to provide a point for mating with a shaft. A plurality of circumferentially spaced passages extend from the top or bottom surface to a side wall of the impeller, each of the passages being separate and preferably having an inlet opening which is equal to or less than the corresponding outlet opening in size. A recess being optionally formed in the top or bottom surface, forming the initial inlet to the passages.
124 Citations
14 Claims
- 1. An impeller for a molten metal pump having a cylindrical body comprised of a refractory material, said cylindrical body including opposed top and bottom surfaces, said cylindrical body further including a bearing element, a means being provided in said top surface for mating with a shaft, a plurality of circumferentially spaced passages extending from said top or bottom surface to a sidewall of said impeller, each of said passages being separate and having an inlet opening in said top or bottom surface and an outlet opening in said sidewall.
- 5. An impeller for a molten metal pump comprised of a cylindrical refractory body, said cylindrical body having opposed top and bottom surfaces and a radial sidewall, said sidewall including a bearing element, said sidewall providing a substantially contiguous surface interrupted only by a plurality of passages extending from said top or bottom surface to said sidewall, and a means for securing a shaft on said top surface.
- 11. A molten metal pump impeller comprising a cylindrical body of a refractory material, said cylindrical body having opposed generally circular top and bottom surfaces interconnected by a substantially contiguous sidewall, said top surface including a generally centrally located hub or bore, said bottom surface including a plurality of radially disposed inlets, each said inlet forming a fluid communication with a respective passage in said body to a respective outlet positioned in said sidewall, and each said respective inlet having a cross-sectional area equal to or less than each respective said outlet.
Specification