Liquid storage tank upper cover assembly of drawing or adding liquid machine and drawing or adding liquid machine
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United States of America Patent
Stats
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Jul 27, 2021
Grant Date -
Aug 20, 2020
app pub date -
Jun 7, 2019
filing date -
Feb 14, 2019
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
This invention disclosures a liquid storage tank upper cover assembly of a drawing or adding liquid machine and a drawing or adding liquid machine. The liquid storage tank upper cover assembly includes an upper cover, a switching valve foundation disposed at an upper end of the upper cover and a valve cartridge cooperated with the switching valve foundation. The upper cover and the switching valve foundation are a one-piece molded part. The switching valve foundation has a sliding hole, a lower part of the upper cover has a first through-hole and a second through-hole which are spaced apart, and the first through-hole and the second through-hole are both connected to the sliding hole. The switching valve foundation has a third through-hole connected with the sliding hole. The valve cartridge is glidingly provided in the sliding hole.
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