Vacuum pump

The utility model discloses a novel vacuum pump, which comprises a button with a discharge hole, a shell, a shell cap, a cover jointed with the external surface of the upper part of the shell through the shell cap, a shaft moving along the internal surface of the shell cap vertically, a piston movin...

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Bibliographic Details
Main Author LI YINSHI
Format Patent
LanguageChinese
English
Published 10.11.2010
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Summary:The utility model discloses a novel vacuum pump, which comprises a button with a discharge hole, a shell, a shell cap, a cover jointed with the external surface of the upper part of the shell through the shell cap, a shaft moving along the internal surface of the shell cap vertically, a piston moving along the inner wall of the shell vertically, a spring disposed between the button and the shell cap, a switching element and a first rod moving along the vertical direction, wherein, a switching element is disposed at the lower end part of the first rod, the shaft is provided with a first channel communicated with the discharge hole of the button, the vacuum pump also comprises a second rod disposed in the shaft and extending along the shaft axially, the second rod is disposed along the external surface of the first rod in sliding way, and the lower end part thereof is provided with a radial bulge formed on the side face and facing outwards, a second channel that can be opened and closed is formed between the pi
Bibliography:Application Number: CN20102119193U