| 摘要 |
PURPOSE: A vacuum pump is provided to be easily manufactured, to have a light weight, and to have a small size for using around space efficiently while easily transferring a powder without being clogged in a nozzle. CONSTITUTION: A vacuum pump(1) containing a multi-stepped nozzle is composed of: a housing(100) containing an injecting chamber(101), a first, a second, and a third vacuum chambers(102,103,104), and a discharging chamber(105); a valve installing plate(200) for blocking the opened unit of the housing; a panel(300) for hiding the front surface of the housing and the valve installing plate. Herein, the housing contains combining bars(160) in predetermined locations on the outer surface, and the combining bars contains a combining nut(161) being extend-formed for a certain length in the end unit of the panel side for being nut-combined to a combining groove(306) of the panel while the other end is contacted to the surface of a finishing plate unit(107) being formed by extended from the outer surface of the housing.
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