Bush to fix mast foot of sailboard - has interior projections mating with similar ones on mast foot

摘要

The bush movably retains the mast foot of a sail board. It has interior projections which can mate with flexible projections on the outer surface of a ferrule. The projection (22) has parts (28,29,30) of different radial widths to give sufficient retaining forces of the ferrule in the bush. The projection also has radial projections separating the parts of different radial widths. These extend to the upper edge of the bush. Each transverse half section of the bush has three zones of successive radial widths.