US Patent No: 8,162,286
Number of patents in Portfolio can not be more than 2000
Piezoelectric driven control valve
Stats
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Apr 24, 2012
Issued date -
Mar 13, 2008
filing date -
12/593,580
serial no -
In Force
status
Importance
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Abstract
Stable flow control is made possible even under high-temperature environments by relieving tensional force applied to a piezoelectric element when a piezoelectric actuator is retracted. Thus, a piezoelectric driven control valve includes: a body having a valve seat; a metal diaphragm to contact with and separate from the valve seat; an actuator box supported ascendably and descendably on the body; a split base fixed to the body; a disc spring pressing and urging the actuator box downward to bring the metal diaphragm into contact with the valve seat; and a piezoelectric actuator housed inside the actuator box and that extends upward with application of voltage to press the actuator box upward against the elastic force of the disc spring, and a precompression mechanism, for applying a compression force constantly to piezoelectric elements in the piezoelectric actuator, provided between the split base and the piezoelectric actuator.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,470,045 Solenoid-actuated diaphragm valve with biased disc spring | 7 | 1994 | |
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| 6,776,390 Valve for controlling fluids | 6 | 2002 | |
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| 6,062,533 Apparatus and method for valve control | 44 | 1999 | |
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| 6,345,803 Piezoelectric fluid control valve | 5 | 2001 | |
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| 6,520,479 Flow rate control valve | 5 | 2000 | |
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