Patent ID: 8177917

Claim:
A cleaning assembly comprising: a hub cone mounted on a liquid supply pipe; a cleaning housing mounted on the hub cone; means for turning the cleaning housing relative to the hub cone about a first axis at the same time as a hub having nozzles is rotated about a second axis that is substantially perpendicular to the first axis; and one or more nozzles or nozzle openings on a part of the cleaning housing that is turnable about the first axis, wherein the one or more nozzles or nozzle openings on the part of the cleaning housing that is turnable about the first axis comprise one or more nozzles or nozzle openings configured to eject a liquid jet against the supply pipe for cleaning the supply pipe during the turning movement of the cleaning housing, and wherein the one or more nozzles or nozzle openings on the part of the cleaning housing that is turnable about the first axis are on a side of the cleaning housing which faces the rotating hub.