公开(公告)号：US11236757B2

公开(公告)日：2022-02-01

申请号：US16301841

申请日：2017-05-10

Applicant: Xylem IP Management S.à r.l.

Inventor： Stefan Bergh

IPC: F04D29/042 ,  F04D7/04 ,  F04D13/08 ,  F04D15/00 ,  F16D1/097

Abstract: 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.

公开(公告)号：US20190154047A1

公开(公告)日：2019-05-23

申请号：US16301841

申请日：2017-05-10

Applicant: Xylem IP Management S.à r.l.

Inventor： Stefan Bergh

IPC: F04D29/042 ,  F04D15/00 ,  F04D13/08 ,  F04D7/04 ,  F16D1/097

Abstract: 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