| 摘要 |
A tire rasp blade made with an arcuate shape and a plurality of sets of teeth at the outer working edge having recesses between each set of teeth. Each set of teeth is inclined in the same direction and is formed by two teeth, with the pair of teeth in each set separated by an inclined narrow slit which has a curved portion at its inner end and which extends inwardly beyond the depth of the recesses between the teeth. Each pair of teeth in each set is displaced laterally or angularly from each other and from the body of the rasp blade. Each tooth of each pair includes a leading edge and a trailing edge wherein the portion of the teeth edges near the outer edge of the blade body are substantially straight or curved. In another embodiment of the invention, clearing teeth are provided wherein each clearing tooth replaces a set of teeth at intervals of the teeth sets along the rasp blade of the rasp blades described above. Each clearing tooth is formed by a single tooth which is in the same plane as the blade body and which does not include the inclined narrow slit of the other teeth sets.
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