| 摘要 |
Cleaning apparatus has a matrix of brush assemblies (10) mounted on a support member (11) such that they are movable both in rotation (x) and in an axial direction (y). The brush assemblies comprise a cleaning brush (15) axially moveable within a gear wheel (22) and rotatable therewith during normal use. Each gear wheel meshes with an adjacent gear wheel to ensure that rotation of one brush causes rotation of the rest of the brushes in the matrix. When any given brush is retracted fully in an axial direction it is disconnected from its respective gear wheel such that it does not rotate therewith and is effectively removed from the drive chain.
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