VENTILATION SWITCHING STRUCTURE OF NEGATIVE PRESSURE REGULATOR
Number of patents in Portfolio can not be more than 2000
United States of America
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Issued Date -
Mar 13, 2025
app pub date -
Sep 11, 2023
filing date -
Sep 11, 2023
priority date (Note) -
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status (Latency Note)
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Abstract
A ventilation switching structure includes a valve, a switching cylinder, and a knob. The valve includes a receiving room, a main tube and branch tubes. The main tube is connected with a negative pressure instrument and connected to the receiving room. The branch tubes are located on two sides of the main tube. The switching cylinder is rotatably disposed in the receiving room and includes a main channel, multiple lateral channels, and a blocking wall. The lateral channels communicate with the main channel and are disposed on a side of the blocking wall at intervals. The knob is connected on the switching cylinder. The knob is capable of rotating the switching cylinder to make the blocking wall optionally block one of the branch tubes so as to accomplish the object of ventilation switching.
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