| 摘要 |
Devices are disclosed for performing a wide range of operations on pipes including the turning of male ends and forming annular grooves thereon, cutting off lengths, or providing threaded holes in the side thereof. Each device includes a basic part, attachments including various tools, and clamps. The basic part comprises a threaded shaft provided with a head and a threaded sleeve provided with a head and slidable on the shaft. Where the device is to be clamped to the interior of a pipe, a wedge-actuated clamp is threaded on the sleeve and operated by rotating the sleeve and an attachment with the appropriate tool is secured to the shaft head for engagement with the exterior of the pipe. Where the tool is to be advanced as the shaft is turned, a nut is provided that may be threaded on the shaft and has a threaded counterbore enabling it also to be attached to the end of the sleeve. Where a hole is to be formed in the side of the pipe, the nut is part of a clamp secured about the pipe with its axis at right angles thereto and the tool is secured axially to the end of the shaft.
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