| 摘要 |
A fluid-driven transducer vacuum tool is disclosed in the preferred embodiment. Pressurized liquid or compressed gas passes through a nozzle tip which is enclosed in a casting. Because the cavities leading to the nozzle tip are of increasingly smaller diameter, a drop in pressure is achieved by the increased velocity of the fluid. Thus, as the fluid leaves the nozzle tip, a vacuum is created which allows substances such as sand or other abrasives, rocks, or slurry to be pulled into the tool through the vacuum inlet. The vacuumed substances pass directly through the apparatus without harming it because the venturi casting of the tool contains a replaceable liner which prevents wear to the tool itself. Because the material can be pulled directly through the tool in this manner, an efficient, portable, and durable tool is provided. As the vacuumed substances are discharged from the apparatus, they can be expelled some distance away from the worksite or transferred to a container.
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