| 摘要 |
A trowel machine has replaceable blades. In a preferred embodiment, the blade (12) can be replaced separately from its backing bar (20), and the same fasteners (28) that secure the blade (12) to the backing bar (20) also secure the blade (12) to the trowel arm (18) of the machine. In a preferred embodiment, the blade (12) is deformed in the area of the mounting holes (30), providing a clamping surface (36) recessed from the working surface of the blade (12) to provide retention of the blade on the trowel machine, even as the blade wears. |
