Patent ID: 11885326
Assignee: MARINE FLOW LIMITED
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC B  F | IPC F

Claim 13:
14. An impeller assembly, the impeller assembly comprising a flexible impeller and a mounting hub operable to connect the flexible impeller to, and support the impeller upon, a drive shaft, wherein the mounting hub is detachable from the impeller so as to render the impeller rotationally decoupled from the drive shaft, and wherein the mounting hub comprises a drive shaft-engaging portion having an aperture located axially in the mounting hub which engages with the drive shaft and rotationally locks the mounting hub relative to the drive shaft, and an impeller body-engaging portion comprising a non-circular profiled portion on an outside of the mounting hub which engages with the impeller and rotationally locks the mounting hub relative to the impeller, and wherein further the mounting hub comprises a tubular member having a cross-section such that surfaces of the drive shaft-engaging portion and the impeller body-engaging portion are adapted to directly engage with the drive shaft and the impeller, respectively, and rotationally lock them together, and the mounting hub is tapered along its length to facilitate insertion of the mounting hub and to provide centering of the impeller relative to the drive shaft as the mounting hub is inserted.