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US 11,236,757 B2Granted
Pump for pumping liquid as well as impeller assembly
AssigneeXylem Europe GmbH
InventorStefan Bergh
Life of this patent
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AssigneeXylem Europe GmbH
InventorStefan Bergh
Estimating the term…
A pump for pumping a liquid, includes an impeller and an axially extending drive shaft assembly, wherein a distal end of the drive shaft assembly is received in a central recess of the impeller. The drive shaft assembly includes a drive shaft and a connector. The connector includes a sleeve that is in telescopic engagement with the drive shaft. During operation of the pump the impeller is displaceable in the axial direction in relation to the sleeve between a distal rest position and a proximal position. The impeller is biased towards the distal rest position by a spring member arranged between the sleeve and the impeller. The connector includes a hollow adjustment screw that is in threaded engagement with an interior side of the sleeve to limit the maximum degree of telescopic overlap between the sleeve and the drive shaft.
A pump for pumping liquid comprising solid matter, said pump comprising an impeller and an axially extending drive shaft assembly, wherein a distal end of the drive shaft assembly is received in a central recess of the impeller, the drive shaft assembly comprising a drive shaft and a connector, wherein the connector comprises a sleeve that is in telescopic engagement with the drive shaft, the impeller being displaceable in an axial direction in relation to said sleeve between a distal rest position and a proximal position during operation of the pump in response to an axial force exerted by solid matter in contact with the impeller, wherein the impeller is biased towards the distal rest position by a spring member arranged between the sleeve and the impeller, the connector further comprising a hollow adjustment screw that is in threaded engagement with an interior side of the sleeve and configured to limit a maximum degree of telescopic overlap between the sleeve and the drive shaft, wherein an impeller screw extends through the adjustment screw and is in threaded engagement with the drive shaft in order to press the adjustment screw towards the drive shaft.
An impeller assembly for a pump configured for pumping liquid including solid matter, said impeller assembly comprising an impeller having a central recess and a connector, wherein the connector comprises a sleeve arranged in the central recess of the impeller, wherein the sleeve is configured to be in telescopic engagement with an axially extending drive shaft, the impeller being displaceable in an axial direction in relation to said sleeve between a distal rest position and a proximal position in response to an axial force exerted by solid matter in contact with the impeller, wherein the impeller is biased towards the distal rest position by a spring member arranged between the sleeve and the impeller, the connector further comprising a hollow adjustment screw that is in threaded engagement with an interior side of the sleeve and configured to limit the maximum degree of telescopic overlap between the sleeve and the drive shaft.
A pump for pumping liquid comprising solid matter, said pump comprising:
Dependencies are inferred from the claim text.