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US 6,551,058 B2Granted
Rotatory pump having a knobbed impeller wheel, and a knobbed impeller wheel therefor
AssigneeRitz Pumpenfabrik GmbH & Co., KG
InventorOlaf Nowack
Life of this patent
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AssigneeRitz Pumpenfabrik GmbH & Co., KG
InventorOlaf Nowack
Estimating the term…
A rotatory pump has a housing (20) and an impeller wheel (40) which is mounted on a driving shaft (30) to rotate integrally therewith. The driving shaft is rotatably supported in the housing. The driving shaft also has a disk (44) disposed to be concentric with the driving shaft. Radially extending blades (46) are directed along the axial direction of the driving shaft (30) being provided on the disk, and the blades, together with the inner wall portions (22a) of the housing (20) which face the blades (46), form flow channels for the fluid to be pumped. At least one raised portion (48) is on each of the radially extending edges (46a) of preferably three blades (46), to bear against the inner wall portions (22a) of the housing (20) which face the blades (46) of the impeller wheel housing.
A rotatory pump for pumping a fluid, said pump having a housing having inner wall portions and an impeller wheel which is mounted on a driving shaft to rotate integrally therewith, said driving shaft being rotatably supported in said housing, and which has a disk disposed to be concentric with said driving shaft, radially extending blades directed along the axial direction of said driving shaft being provided on said disk, and said blades, together with the inner wall portions of the housing which face the blades, forming flow channels for the fluid to be pumped,
An impeller wheel for a rotatory pump for pumping a medium, said pump having a driving shaft and a housing for accommodating the impeller wheel, the housing having inner wall portions, the impeller wheel having a disk adapted to be disposed on the driving shaft to be integrally rotatable therewith and concentric to an axis thereof, blades being disposed on one side of said disk to form parts of flow channels for the medium to be pumped, characterized in that at least one raised portion is disposed on each of the radially extending edges of the blades which bears against the inner wall portions.
In a centrifugal pump for pumping a fluid, the pump comprising a housing having at least one inner wall portion, with a drive shaft rotatably supported therein, and an impeller integrally mounted on the drive shaft to rotate in the housing, the impeller comprising a central hub and a disk disposed to be concentric with the drive shaft, a plurality of radially extending blades provided on the disk, each of the plurality of blades directed axially outwardly from the disk and radially outwardly from the hub relative to the drive shaft, each of the plurality of blades terminating in a radially extending edge, wherein at least some of the edges have at least one raised portion provided thereon, so that each of the raised portions bear against one of said at least one inner wall portions that face the blades to form flow channels for the fluid.
Dependencies are inferred from the claim text.