| 摘要 |
A system and method are provided for using a portable tool for assisting the making of holes in installed pipes, e.g., as water pipes and the like, to prepare f or interconnected piping. Such system includes a hollow, cylindrical hole-saw guide, having an axis, for guiding the hole-saw while the hole-saw is making a hole in only the first side of the hollow installed pipe. The tool is constructed and arranged to maintain user - selected relative positions between the hollow installed pipe and the hole-saw while the hole-saw is making the hole in only the first side of the hollow installed pipe. A first fixed clamp-head is provided for positioning the hollow, cylindrical hole-saw guide adjacent the first side of the hollow installed pipe. A second movable and swivelable clamp-head is provided for holding a second side, opposed to the first side, of the hollow installed pi pe in such manner as to have the centre line of the hollow installed pipe intersect the axis o f the hollow cylindrical hole-saw guide. The second movable and swivelable clamp-head includes a V- shaped member solid which is closed along the axis of the hollow cylindrical hole-saw guide. A grip is provided for adjusting and positioning the first and second clamp-heads into a user-selected clamping position about the hollow installed pipe. The hole saw guide is preferably contained in a clamp-head at the end of the fixed jaw of a VIC E- GRIP .TM. -like device. Such clamp-head accommodates various sizes of guide bushings and hol e- saws for making various size holes in various size pipes. Other features assist accurate hole positioning, e.g., horizontal and vertical levels, centre marks, and V-shape d holding surfaces on the clamp-heads. |
