| 摘要 |
A rasp for the scraping of worn rubber tires has a generally cylindrical body composed of a multiplicity of blades peripherally adjoining one another, the blades being sandwiched between a pair of end disks held together by an axial bolt and bridged by axially extending rods which traverse at least two mounting holes in each blade. The blades may have a polygonal shape, with three or more toothed sides, overlapping one another so that one toothed side of each blade comes to lie along the periphery of the body to define part of a cutting surface. Additional apertures in the blades serve for the circulation of air therethrough, these apertures being flanked by lugs integral with the blades which are bent out laterally to form spacers therebetween; the end disks may also be apertured to facilitate air cooling of the body. Each blade tooth is bounded by four concave arcuate edges defining three sharp points, the middle point projecting radialy beyond the two flanking points; each tooth, or each pair of adjacent teeth, is symmetrical about a radial line. |
