Cleaning system for chimney - has square or circular brush drawn up flue by endless cord trained around upper and lower pulleys

摘要

The cleaning system consists of a square or circular brush (depending on the cross-sectional shape of the flue) with its bristles projecting radially. The brush is attached to both ends of a cord that passes around pulley wheels at the top and bottom of the flue. The cord pulls the brush up and down the flue depending on the direction in which it is moved so that its brushes sweep the walls. The brush's radial bristles are attached to the outer face or faces of a square or cylindrical box. The box has fixing points for the ends of the cord.