Scrap melter impeller
First Claim
1. A scrap melter impeller to be submerged into a molten metal bath, comprising:
- a rectangular block of refractory material, said block having a flat upper surface and a formed lower surface, wherein said formed lower surface includes;
a first section disposed in a central portion of said block, said first section having an even thickness from a first side of the impeller to a second side of the impeller;
a second section adjacent to said first section, said second section being tapered from a thin section at the first side of said metal block to a thick section at the second side of the block, said thickness of said second section at said second side corresponding to the thickness of said central portion; and
said formed lower surface also includesa third section adjacent to and on an opposite side of said first section from said second section, said third section tapering from a thick section at the first side of the impeller where a thickness of said third section corresponds to the thickness of the central portion, to a thin section at the second side of the impeller.
2 Assignments
0 Petitions
Accused Products
Abstract
A scrap melter apparatus which includes a drive motor disposed above a molten metal bath, and a shaft attached to a bottom of the drive motor, and protrudes partway into the molten metal bath. A scrap melter impeller is attached to the bottom of the shaft. The impeller is a rectangular block of refractory metal, having a flat upper surface and a formed lower surface. The formed lower surface includes a first area disposed in a central portion of the metal block which has an even thickness from a first side of the impeller to a second side of the impeller. A second area is adjacent to the first area, and is tapered from a thin section at the first side of the metal block to a thick section at the second side of the metal block. The thickness of the second area at the second side corresponds to the thickness of the central area. A third area is adjacent to and on an opposite side of the first area from the second area. The third area tapers from a thick section at the first side of the impeller where a thickness corresponds to the thickness of the central area, to a thin section at the second side of the impeller.
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Citations
17 Claims
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1. A scrap melter impeller to be submerged into a molten metal bath, comprising:
a rectangular block of refractory material, said block having a flat upper surface and a formed lower surface, wherein said formed lower surface includes; a first section disposed in a central portion of said block, said first section having an even thickness from a first side of the impeller to a second side of the impeller; a second section adjacent to said first section, said second section being tapered from a thin section at the first side of said metal block to a thick section at the second side of the block, said thickness of said second section at said second side corresponding to the thickness of said central portion; and
said formed lower surface also includesa third section adjacent to and on an opposite side of said first section from said second section, said third section tapering from a thick section at the first side of the impeller where a thickness of said third section corresponds to the thickness of the central portion, to a thin section at the second side of the impeller. - View Dependent Claims (2, 3, 4, 5, 13, 14, 15, 16)
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6. A scrap melter apparatus, comprising:
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a drive means disposed above a molten metal tank; a shaft means attached to a bottom section of said drive means, and protruding partway into said molten metal tank; and a scrap melter impeller fixedly attached to a bottom portion of said shaft, said impeller comprising a rectangular block of refractory material, said block having a flat upper surface and a formed lower surface, wherein said formed lower surface includes a first section disposed in a central portion of said block, said first section having an even thickness from a first side of the impeller to a second side of the impeller; a second section adjacent to said first section, said second section being tapered from a thin section at the first side of said block to a thick section at the second side of the block, said thickness of the second section at said second side corresponding to the thickness of said central portion; and a third section adjacent to and on an opposite side of said first section from said second section, said third section tapering from a thick section at the first side of the impeller where a thickness corresponds to the thickness of the central portion, to a thin section at the second side of the impeller. - View Dependent Claims (7, 8, 9, 10)
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11. A scrap melter apparatus, comprising:
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drive means disposed above a molten metal tank, said drive means having a rotating member at a bottom portion thereof; connecting means attached to said drive means; shaft means attached to said connecting means, said shaft means having an upper end and a lower end thereof and protruding partway into said molten metal tank; a scrap melter impeller fixedly attached to the lower end of said shaft means; wherein said connecting means comprises a connecting unit attached to said rotating member and having a pilot flange, with the upper end of said shaft means having a concentric locating bore therein, a split coupling provided on the upper end of the shaft means and including two half flanges each having a depending half cylindrical member attached thereto, a bolt extending through a diametrical through bolt hold provided in the shaft means and a pair of bolt holes in said depending half cylindrical members positioned such that upper faces of the half flanges of the split coupling are substantially aligned with the upper end of the shaft means, said pilot flange having a center cylinder extending coaxially therefrom sized to match and be received in the concentric locating bore of the shaft, said pilot flange having tapped holes for each half flange of the split coupling to be mounted to the pilot flange, appropriately sized shoulder bolts threadingly engaged in said tapped holes and joining said half flanges of said split coupling to said pilot flange, said half flanges and said pilot complementing the shear strength of the bolts. - View Dependent Claims (12, 17)
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Specification