Negative pressure generating device and automatic negative pressure wound therapy device having pressure changing function using the same
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United States of America Patent
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Nov 30, 2021
Grant Date -
Sep 12, 2019
app pub date -
Nov 8, 2017
filing date -
Nov 8, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a negative pressure generating device and an automatic negative pressure wound therapy device having a pressure changing function using the same. The present invention includes a static load elastic unit which provides an elastic force having a predetermined magnitude; a rotating unit which is connected to the static load elastic unit to rotate by the static load elastic unit; and a negative pressure cylinder which is connected to the rotating unit and interworks with the rotation of the rotating unit to generate a negative pressure therein. According to the present invention, a constant negative pressure may be consistently generated by a mechanical structure so that a manufacturing cost is significantly reduced as compared with an electrical structure and the size may be reduced.
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