Pumps for pumping molten metal with a stirring action
First Claim
1. In a non-metallic pump for pumping molten metal including a motor, a shaft having one end connected to the motor and extending along a longitudinal axis, an impeller connected to the other end of the shaft, a base having a chamber in which the impeller is rotatable, an inlet opening through which molten metal can enter the base, a base opening in one of an upper and lower portion of said base and an outlet opening through which molten metal can leave the base, and structure for removably inserting the base into a bath of molten metal, the improvement wherein the impeller is made of a non-rnetallic, heat resistant material, and comprises a generally circular base portion at one end of the impeller having surfaces that extend generally transverse to the longitudinal axis, wherein said base portion is disposed so as to obstruct said base opening, an end face spaced apart from said one end along the longitudinal axis, vanes extending outwardly from said base portion and along said longitudinal axis between said end face and said base portion, and impeller openings circumferentially spaced apart from each other between the surfaces of said base portion.
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Accused Products
Abstract
A non-metallic pump for pumping molten metal includes a motor, a shaft having one end connected to the motor and an impeller connected to the other end of the shaft. A base has a chamber in which the impeller is rotatable. Structure is used to removably insert the base into a bath of molten metal. The impeller includes stirrer openings which are configured and arranged to enable the impeller to cause solid matter in the molten metal to move toward an upper surface of the bath.
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Citations
51 Claims
- 1. In a non-metallic pump for pumping molten metal including a motor, a shaft having one end connected to the motor and extending along a longitudinal axis, an impeller connected to the other end of the shaft, a base having a chamber in which the impeller is rotatable, an inlet opening through which molten metal can enter the base, a base opening in one of an upper and lower portion of said base and an outlet opening through which molten metal can leave the base, and structure for removably inserting the base into a bath of molten metal, the improvement wherein the impeller is made of a non-rnetallic, heat resistant material, and comprises a generally circular base portion at one end of the impeller having surfaces that extend generally transverse to the longitudinal axis, wherein said base portion is disposed so as to obstruct said base opening, an end face spaced apart from said one end along the longitudinal axis, vanes extending outwardly from said base portion and along said longitudinal axis between said end face and said base portion, and impeller openings circumferentially spaced apart from each other between the surfaces of said base portion.
- 10. In a non-metallic pump for pumping molten metal including a motor, a shaft having one end connected to the motor and extending along a longitudinal axis, an impeller connected to the other end of the shaft, a base having a chamber in which the impeller is rotatable, an inlet opening through which molten metal can enter the base, a base opening in one of an upper and lower portion of said base and an outlet opening through which molten metal can leave the base, and structure for removably inserting the base into a bath of molten metal, the improvement wherein the impeller is made of a non-metallic, heat resistant material and comprises an inlet opening at one end portion leading to a central cup-shaped interior, said impeller inlet opening being located adjacent said base inlet opening, main outlet openings extending outwardly from the cup-shaped interior generally transverse to said longitudinal axis, a generally circular base portion spaced from said one end portion along said longitudinal axis, wherein said base portion extends between an interior face that forms a portion of said cup-shaped interior and an exterior face and said base portion is disposed so as to obstruct said base opening, said interior face and said exterior face extending generally transverse to said longitudinal axis, and impeller openings in said base portion that extend from said interior face.
- 16. In a non-metallic pump for pumping molten metal including a motor, a shaft having one end adjacent the motor and extending along a longitudinal axis, an impeller connected to the other end of the shaft, a base having a chamber in which the impeller is rotatable, an Inlet opening through which molten metal can enter the base, a base opening in one of an upper and lower portion of the base and an outlet opening through which molten metal can leave the base, and structure for removably inserting the base into a bath of molten metal, the improvement wherein the impeller is made of a non-metallic, heat resistant material, and comprises a generally circular base portion having faces that extend generally transverse to said longitudinal axis, said base portion being disposed so as to obstruct said base opening, a triangular shaped polygonal member extending from the base portion, and impeller openings in at least one of said impeller base portion and said polygonal member.
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24. In a non-metallic pump for pumping molten metal including a motor, a shaft having one end adjacent the motor and extending along a longitudinal axis, an impeller connected to the other end of the shaft, a base having a chamber in which the impeller is rotatable, an inlet opening through which molten metal can enter the base and an outlet opening through which molten metal can leave the base, and structure for removably inserting the base into a bath of molten metal, the improvement wherein the impeller is made of a non-metallic, heat resistant material, and comprises a generally circular base portion, a polygonal member extending from the base portion, and impeller openings that extend through said polygonal member and through said impeller base portion.
- 25. An impeller for pumping molten metal, said impeller being made of a non-metallic, heat resistant material and comprising a generally circular base portion at one end of the impeller having surfaces that extend generally transverse to a rotational axis of the impeller, an end face spaced apart from said one end along the rotational axis, vanes extending outwardly from said base portion and along said rotational axis between said end face and said base portion, and impeller openings circumferentially spaced apart from each other between the surfaces of said base portion, wherein each of said impeller openings extends at an angle with respect to said rotational axis.
- 32. An impeller for pumping molten metal, said impeller being made of a non-metallic, heat resistant material and comprising an inlet opening at one and portion leading to a central cup-shaped interior, main outlet openings extending outwardly from the cup-shaped interior generally transverse to an axis of rotation of the impeller, a generally circular base portion spaced from said one end portion along said axis of rotation of said impeller, said base portion extending between an interior face that forms a portion of said cup-shaped interior and an exterior face, said interior face and said exterior face extending generally transverse to said axis of rotation, and impeller openings in said base portion that extend from said interior face.
- 36. An impeller for pumping molten metal, said impeller being made of a non-metallic, heat resistant material, comprising a generally circular base portion having faces that extend generally transverse to an axis of rotation of the impeller, a triangular shaped polygonal member extending from the base portion, and impeller openings in at least one of said base portion and said polygonal member.
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41. An impeller for pumping molten metal, said impeller being made of a non-metallic, heat resistant material, comprising a generally circular base portion, a polygonal member extending from the base portion, and impeller openings that extend through said polygonal member and through said impeller base portion.
- 42. An impeller for pumping molten metal, said impeller being made of a non-metallic, heat resistant material, comprising means for moving molten metal in a direction generally along an axis of rotation of said impeller and in a direction generally transverse to said rotational axis, a generally circular base portion disposed at an end of the impeller having surfaces that extend in the transverse direction along a substantial radial portion of said impeller and are exposed to said molten metal along said radial portion, and impeller openings extending between the surfaces of said impeller base portion each extending at an angle with respect to said rotational axis.
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47. A method of pumping molten metal with a non-metallic pump comprising the steps of
submerging a base of the pump in a bath of molten metal; -
rotating an impeller on the end of a shaft in a chamber of the pump base; moving molten metal, as a result of rotation of said impeller, through an inlet opening of the pump base toward the impeller in a generally longitudinal direction of the shaft; moving molten metal as a result of rotation of said impeller, away from the impeller In a direction generally transverse to the longitudinal direction and through an outlet opening of the pump base; rotating impeller openings disposed in a generally circular base portion at one end of the impeller, wherein said base portion includes surfaces that extend generally transverse to said rotational axis and said base portion is disposed so as to rotate in an opening that is located in one of an upper and lower portion of said pump base; and moving solid matter in the molten metal toward an upper surface of the bath by the rotation of said impeller openings. - View Dependent Claims (48, 49, 50, 51)
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Specification