| 摘要 |
A ferrule for the shaft of a walking stick, walking cane, crutch, umbrella, roller-ski staff or like device. The ferrule is intended to support against an underlying surface (6) and has a convex supporting surface (7) which faces towards the underlying surface and which is orientated to roll against said underlying surface (6) in a longitudinal direction as the shaft is swung essentially in the direction of movement. The effective width of the supporting surface (7) transversely to the longitudinal direction of said supporting surface generally increases from the region of the intersection between the shaft axis and the supporting surface (7), in both directions of the longitudinal extension of the supporting surface. |
