| 摘要 |
<p>A cutting tool for cutting internally formed beads in welded plastic piping which comprises a shaft (1) on which is mounted a helical cutting blade (2). Forward of the cutting blade (2) is a grapnel (6) to retrieve the cutting bead (9). In use, the tool is inserted down the bore of a pipe section until the leading edge of the cutting blade (2) abutts the bead. The blade is forced into the bead (9) by the pushing of the tool and then withdrawn from the bore of the pipe. The grapnel (6) engages the cut bead (9) which is withdrawn with the tool.</p> |
