Patents by Inventor Robert Mepham
Robert Mepham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20190366350Abstract: A sleeve insert for covering one or more selected surfaces of one or more pulp lifters of a discharge end assembly including a discharge end wall of a mill shell partially defined by an outer perimeter wall thereof, the pulp lifters being mounted on the discharge end wall. The sleeve insert is formed to cover the selected surfaces to mitigate wear to which the selected surfaces are subjected when the sleeve insert is located in a predetermined position relative to the selected surfaces.Type: ApplicationFiled: August 14, 2019Publication date: December 5, 2019Applicant: Polycorp Ltd.Inventors: Robert Mepham, Pramod Kumar, Robert Michael McPhee
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Patent number: 10427164Abstract: An insert for covering one or more selected surfaces of a discharge end assembly including a discharge end wall of a mill shell partially defined by an outer perimeter wall thereof and a number of pulp lifters mounted on the discharge end wall. The insert is formed to cover the selected surfaces to mitigate wear to which the selected surfaces are subjected when the insert is located in a predetermined position relative to the selected surfaces.Type: GrantFiled: September 23, 2015Date of Patent: October 1, 2019Assignee: Polycorp Ltd.Inventors: Robert Mepham, Pramod Kumar, Robert Michael McPhee
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Publication number: 20170014831Abstract: An insert for covering one or more selected surfaces of a discharge end assembly including a discharge end wall of a mill shell partially defined by an outer perimeter wall thereof and a number of pulp lifters mounted on the discharge end wall. The insert is formed to cover the selected surfaces to mitigate wear to which the selected surfaces are subjected when the insert is located in a predetermined position relative to the selected surfaces.Type: ApplicationFiled: September 23, 2015Publication date: January 19, 2017Applicant: Polycorp Ltd.Inventors: Robert Mepham, Pramod Kumar, Robert Michael McPhee
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Patent number: 9289775Abstract: A discharge grate assembly for at least partially guiding slurry from a mill shell chamber toward a discharge trunnion thereof via a pulp lifter chamber. The discharge grate assembly includes a body having apertures for permitting the slurry to flow from the mill shell chamber into the pulp lifter chamber, and a shroud having a number of cover elements and a number of openings located at least partially therebetween. The shroud is movable relative to the body between an open position, in which the openings are at least partially aligned with at least preselected ones of the apertures to permit the slurry to flow therethrough into the pulp lifter chamber, and a closed position, in which the cover elements are at least partially aligned with at least predetermined ones of the apertures, to at least partially prevent the slurry flowing through the apertures back into the mill shell chamber.Type: GrantFiled: November 19, 2013Date of Patent: March 22, 2016Assignee: Polycorp Ltd.Inventors: Robert Mepham, David J. Page, Pramod Kumar
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Publication number: 20140138466Abstract: A discharge grate assembly for at least partially guiding slurry from a mill shell chamber toward a discharge trunnion thereof via a pulp lifter chamber. The discharge grate assembly includes a body having apertures for permitting the slurry to flow from the mill shell chamber into the pulp lifter chamber, and a shroud having a number of cover elements and a number of openings located at least partially therebetween. The shroud is movable relative to the body between an open position, in which the openings are at least partially aligned with at least preselected ones of the apertures to permit the slurry to flow therethrough into the pulp lifter chamber, and a closed position, in which the cover elements are at least partially aligned with at least predetermined ones of the apertures, to at least partially prevent the slurry flowing through the apertures back into the mill shell chamber.Type: ApplicationFiled: November 19, 2013Publication date: May 22, 2014Applicant: Polycorp Ltd.Inventors: Robert Mepham, David J. Page, Pramod Kumar
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Patent number: 8622330Abstract: A mill liner assembly for mounting on an inner diameter of a shell of a grinding mill. The mill liner assembly includes one or more shell plates for engagement with the shell, each of the shell plates having a cooperating portion thereof, and one or more lifter bars, each of the lifter bars having a mounting portion thereof, the mounting portion being receivable on the cooperating portion. The mill liner assembly also includes one or more layers having one or more substantially non-resilient materials and a substantially non-sticking surface. The layer is at least partially positioned on at least a first selected one of the cooperating portion and the mounting portion, to position the non-sticking surface thereof for engagement with a second selected one of the cooperating portion and the mounting portion, to impede adhesion of the shell plate and the lifter bar to each other.Type: GrantFiled: January 13, 2012Date of Patent: January 7, 2014Assignee: Polycorp Ltd.Inventors: Robert Mepham, David J. Page, Pramod Kumar
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Publication number: 20130062449Abstract: A grinding mill including one or more lifter bar assemblies mounted on a shell rotatable around a central axis thereof. Each lifter bar assembly is for lifting at least a lifted portion of a charge including ore, and includes a main portion for lifting and directing a main part of the lifted portion in a main part direction substantially orthogonal to the central axis of the shell. The lifter bar assembly also includes one or more terminal lifter bars located proximal to one or both of feed and discharge ends of the shell, for lifting and directing terminal part(s) of the lifted portion of the charge. The terminal lifter bar is positioned for directing the terminal part of the lifted portion of the charge at least partially in a terminal part direction which is substantially non-aligned with the main part direction.Type: ApplicationFiled: May 13, 2011Publication date: March 14, 2013Applicant: POLYCORP LTD.Inventors: Pramod Kumar, Raj K. Rajamani, David J. Page, Robert Mepham
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Patent number: 8360350Abstract: A discharge end liner attachable to a discharge end wall in a grinding mill. The discharge end liner includes a number of pulp lifter elements mountable on the discharge end wall for at least partially defining a number of chambers rotatable in the predetermined direction respectively between a submerged condition and a raised condition. The discharge end liner also includes one or more grate subassemblies positionable on the pulp lifter elements, for at least partially screening the slurry. At least a part of each grate subassembly is located by an outer portion of the pulp lifter element in a predetermined position relative to the discharge end wall. An inner portion of each pulp lifter element defines an obtuse angle between the inner portion and the outer portion, for permitting the retained portion of the slurry to evacuate from each chamber respectively while each chamber is in the raised condition.Type: GrantFiled: May 26, 2009Date of Patent: January 29, 2013Assignee: Polycorp Ltd.Inventors: Robert Mepham, David J. Page, Pramod Kumar
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Patent number: 8308906Abstract: A discharge grate assembly for at least partially guiding slurry from a mill shell chamber in a rotating mill shell to a discharge trunnion thereof via a pulp lifter chamber. The discharge grate assembly includes a body having a number of apertures for permitting the slurry to flow from the mill shell chamber into the pulp lifter chamber. The discharge grate assembly also includes a number of louvers movable between a closed position, in which the apertures in the body are at least partially covered by the louvers, and an open position, in which the apertures are at least partially unobstructed by the louvers.Type: GrantFiled: July 30, 2009Date of Patent: November 13, 2012Assignee: Polycorp Ltd.Inventors: David J. Page, Pramod Kumar, Robert Mepham
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Publication number: 20120228416Abstract: A lifter bar for lifting an engaged portion of a load comprising a number of ore pieces above a disengaged portion of the load in a grinding mill having a shell rotatable about an axis thereof. The lifter bar includes a leading face having one or more leading surfaces, and a trailing face. The lifter bar is mountable on the shell located at a predetermined distance from a trailing face of a preceding lifter bar. When the lifter bar and the preceding lifter bar are mounted on the shell, the leading face and the trailing face of the preceding lifter bar at least partially define a pocket therebetween in which a part of the engaged portion of the load is at least partially retainable, until the leading surface is located in a predetermined release position, at which the part has substantially exited the pocket under the influence of gravity.Type: ApplicationFiled: November 19, 2010Publication date: September 13, 2012Applicant: POLYCORP LTD.Inventors: David J. Page, Pramod Kumar, Raj K. Rajamani, Robert Mepham
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Publication number: 20120181364Abstract: A mill liner assembly for mounting on an inner diameter of a shell of a grinding mill. The mill liner assembly includes one or more shell plates for engagement with the shell, each of the shell plates having a cooperating portion thereof, and one or more lifter bars, each of the lifter bars having a mounting portion thereof, the mounting portion being receivable on the cooperating portion. The mill liner assembly also includes one or more layers having one or more substantially non-resilient materials and a substantially non-sticking surface. The layer is at least partially positioned on at least a first selected one of the cooperating portion and the mounting portion, to position the non-sticking surface thereof for engagement with a second selected one of the cooperating portion and the mounting portion, to impede adhesion of the shell plate and the lifter bar to each other.Type: ApplicationFiled: January 13, 2012Publication date: July 19, 2012Inventors: Robert Mepham, David J. Page, Pramod Kumar
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Publication number: 20110146933Abstract: A discharge grate assembly for at least partially guiding slurry from a mill shell chamber in a rotating mill shell to a discharge trunnion thereof via a pulp lifter chamber. The discharge grate assembly includes a body having a number of apertures for permitting the slurry to flow from the mill shell chamber into the pulp lifter chamber. The discharge grate assembly also includes a number of louvers movable between a closed position, in which the apertures in the body are at least partially covered by the louvers, and an open position, in which the apertures are at least partially unobstructed by the louvers.Type: ApplicationFiled: July 30, 2009Publication date: June 23, 2011Inventors: David J. Page, Pramod Kumar, Robert Mepham
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Publication number: 20110068207Abstract: A discharge end liner attachable to a discharge end wall in a grinding mill. The discharge end liner includes a number of pulp lifter elements mountable on the discharge end wall for at least partially defining a number of chambers rotatable in the predetermined direction respectively between a submerged condition and a raised condition. The discharge end liner also includes one or more grate subassemblies positionable on the pulp lifter elements, for at least partially screening the slurry. At least a part of each grate subassembly is located by an outer portion of the pulp lifter element in a predetermined position relative to the discharge end wall. An inner portion of each pulp lifter element defines an obtuse angle between the inner portion and the outer portion, for permitting the retained portion of the slurry to evacuate from each chamber respectively while each chamber is in the raised condition.Type: ApplicationFiled: May 26, 2009Publication date: March 24, 2011Inventors: Robert Mepham, David J. Page, Pramod Kumar