| 摘要 |
<p>A tapping T for effecting a house outlet connection on non-metallic plastic pipe. A tapping tool is threadedly supported in the body of a tapping T service connector adapted for mounting on a pipe main under pressure. The cutting nose of the tool is secured on a plastic head and is comprised of a smooth, thin wall circularly tubular sleeve the radial end facing of which is serially stepped axially inward in a repetitively controlled pattern of sequential relief about its periphery. To cut a slug or coupon, the cutting nose via the head is threadedly advanced into the pipe wall while a screw extending centrally outward of the cutting nose aids in retaining the cut coupon within the open bore of the sleeve.</p> |
