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US 7,118,327 B2Granted
Impeller and cutting elements for centrifugal chopper pumps
AssigneeEnviroTech Pumpsystems, Inc.
InventorsBrandon R. Doering, James C. Harmon
Life of this patent
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Abstract
A pump impeller and associated cutting elements are disclosed which are especially designed and positioned near the periphery of the impeller to reduce the size of entrained solids in a pumped fluid, or slurry, and to expel such solids from the impeller, drive shaft and associated sealing mechanisms.
Claims23
An impeller assembly for a centrifugal pump, comprising:
- an impeller having a suction side, a drive side, a central opening for attachment to a drive mechanism and a circumferential edge;
- at least one vane positioned on said suction side of said impeller;
- at least one interdented cutting structure positioned on said drive side of said impeller positioned proximate said circumferential edge;
- and
- at least one adjacently positioned interdented cutting element positioned for intermeshing interaction with said at least one interdented cutting structure of said impeller to effect cutting of solids near said circumferential edge on said drive side of said impeller.
2 more elements
An impeller for a centrifugal chopper pump, comprising:
- an impeller having a central axis, a periphery, a suction side and a drive side;
- at least one vane extending radially outwardly relative to said central axis on said suction side of said impeller;
- and
- at least one interdented cutting element positioned on said drive side of said impeller in proximity to said periphery thereof.
1 more element
A centrifugal pump having a pump casing and a drive mechanism, comprising:
- an impeller having a central opening for attachment to a drive mechanism of a pump, a periphery and a drive side, said impeller having at least one vane radiating outwardly from a central axis of said impeller;
- at least one interdented cutting structure positioned on said drive side of said impeller located proximate said periphery of said impeller;
- and
- at least one cutting element positioned adjacent said at least one interdented cutting structure of said impeller, said at least one interdented cutting element being structured and positioned to interact with said at Least one interdented cutting structure of said impeller to effect cutting of solids near the periphery, and on said drive side, of said impeller.
1 more element
Dependencies are inferred from the claim text.