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US 9,243,646 B2Granted
Impeller
AssigneeGrundfos Management A/S
InventorJens Vestergaard Boll
Life of this patent
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Abstract
An impeller (2) for a centrifugal pump includes a first shroud having a plurality of blades (8). A second shroud is joined onto the first shroud by way of welding. Each blade (8) has an apex region (12), at which the blade contacts the second shroud. At least one of the blades (8) in a first section (20) of the apex region (12) has a weld connection to the second shroud, and in at least one second section (14) of the apex region (12) is free of a weld connection.
Claims11
An impeller (2) for a centrifugal pump, the impeller comprising:
- a first shroud having a plurality of blades (8);
- and
- a second shroud joined onto the first shroud by way of welding,
- wherein each blade (8) has an apex region (12) where the blade contacts the second shroud, and
- wherein at least one of the blades (8) in a first section (20) of the apex region (12) has a weld connection to the second shroud, and in at least one second section (14) of the apex region (12) is free of a weld connection, and only the first section (20) of the apex region (12) is manufactured of a light-absorptive material.
2 more elements
Dependencies are inferred from the claim text.