Title: Brush construction

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Abstract: A rotary brush construction, particularly for a top brush for washing vehicles including elongate bristles carried on a perforate hollow cylindrical core of relatively small diameter. A plurality of axially short collar units secure the core on a shaft for rotation therewith and are spaced along the inside of the core. The collars each comprise a hub fixed to the shaft and, in one embodiment, a shell radially spaced from the hub by radial web members, for carrying the core. Tension members extend from the hub through the shell and hold the core to the shell. The collars occupy minimal cross-sectional area within the core. Lubricant liquid streams enter the opposite core ends and pass inward through the collars for substantially uniform distribution of liquid within the core. The liquid passes out through the core perforations to lubricate the bristles. The core preferably comprises plural longitudinal sections having differing bristle densities. The core and collar are preferably circumferentially segmented, the collar segments being secured together at the web members thereof. In a modification, a disc extends radially outward from an end of the core to prevent bristle entanglement with brush supports and liquid feed lines. In another embodiment, each hub is secured by radial tension members and spacers to the core, without the said shell, and axially outer hubs are of lesser diameter than axially inner ones.


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