Hydrostatically adjustable valve and associated system
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United States of America Patent
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Jul 4, 2023
Grant Date -
Apr 1, 2021
app pub date -
Nov 20, 2020
filing date -
Apr 25, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
The present disclosure relates to a hydrostatically adjustable flow control valve. In one embodiment, the valve includes a fixed sleeve that slidably receives a spool. A spring biases the spool relative to the fixed sleeve. A primary orifice is used to deliver fluid to the interior area of the fixed sleeve and spool. A control device is used to selectively vary the rate at which fluid drains from the interior area. Draining the fluid results in the spool being received within the interior of the fixed sleeve. The movement of the spool opens flow ports within the sleeve. This, in turn, allows fluid to exit the valve. Conversely, the control device can be set to prevent fluid drainage. This results in the spool extending from interior of the fixed sleeve, the closure of the flow ports, and the sealing of the valve.
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