Molten metal impeller
First Claim
1. A molten metal impeller comprised of a generally cylindrical graphite body including a plurality of passages extending from a top surface to a side wall, a hub formed in the center of the graphite body, a ceramic cap member secured to the top surface of said graphite body, said cap member being comprised of a ring forming a central passage shaped to cooperatively overlay the hub and a plurality of vanes extending radially from said ring to an outer rim, said rim having a height between adjacent vanes which increases in the direction of intended impeller rotation, said rim further having a height which decreases from its radially outer most edge to an inner most edge creating a incline.
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Accused Products
Abstract
According to one embodiment, a molten metal impeller is provided. It includes a generally cylindrical graphite body having a plurality of passages extending from a top surface to a side wall. A hub is formed in the center of the graphite body. A ceramic cap member is secured to the top surface of the graphite body. The cap member is comprised of a ring forming a central passage shaped cooperatively to overlap the hub and a plurality of vanes extending radially from the ring to an outer rim. The rim has a height between adjacent vanes which increases in the direction of intended impeller rotation. The rim further has a height which decreases from its radially outer most edge to an inner most edge.
84 Citations
22 Claims
- 1. A molten metal impeller comprised of a generally cylindrical graphite body including a plurality of passages extending from a top surface to a side wall, a hub formed in the center of the graphite body, a ceramic cap member secured to the top surface of said graphite body, said cap member being comprised of a ring forming a central passage shaped to cooperatively overlay the hub and a plurality of vanes extending radially from said ring to an outer rim, said rim having a height between adjacent vanes which increases in the direction of intended impeller rotation, said rim further having a height which decreases from its radially outer most edge to an inner most edge creating a incline.
- 11. A molten metal impeller comprised of a generally cylindrical graphite body including a plurality of vanes defining passages extending from a top or bottom surface to a side wall, a ceramic cap member secured to the surface of said graphite body, said cap member being comprised of a plurality of vanes at least substantially corresponding to said plurality of graphite body vanes and extending to a rim, said rim having segments between adjacent vanes, said segments having a height profile which increases in the direction of intended impeller rotation.
- 16. A molten metal impeller comprised of a graphite body having a central hub disposed upon a generally disk shaped base and at least two vanes extending from said hub and seated upon said base, a ceramic cap member engaging a top surface of said graphite body, at least one cement filled notch extending cooperatively into each of said cap member and said graphite body, the cap member having a central ring sized to overlay said hub and wings extending therefrom, said wings shaped to cooperatively overlay said vanes, each wing having a terminal end with a vane engaging edge and an opposed edge wherein each opposed edge is chamfered.
- 21. A molten metal impeller comprised of a graphite body, said body having an at least substantially cylindrical sidewall and opposed top and bottom end walls, at least one of said end walls forms an inlet comprised of multiple passages extending to said sidewall, said passages being defined by a plurality of radially extending vanes and a peripheral rim, said vanes having a terminal portion intersecting said rim, said terminal portion being canted in the intended direction of impeller rotation, and wherein sections of said rim between said vanes include a surface downwardly sloped away from the direction of intended impeller rotation.
Specification