US Patent No: 8,162,286

Number of patents in Portfolio can not be more than 2000

Piezoelectric driven control valve

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ALSO PUBLISHED AS: 20100127196
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Abstract

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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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Patent Owner(s)

Patent OwnerAddressTotal Patents
FUJIKIN INCORPORATEDOSAKA, JP200

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dohi, Ryosuke Osaka, JP 14 181
Hirata, Kaoru Osaka, JP 33 61
Ikeda, Nobukazu Osaka, JP 197 951
Nishino, Kouji Osaka, JP 98 266
Sawada, Yohei - 12 2

Cited Art Landscape

Patent Info (Count) # Cites Year
 
HITACHI METALS, LTD. (1)
5,470,045 Solenoid-actuated diaphragm valve with biased disc spring 8 1994
 
ROBERT BOSCH GMBH (1)
6,776,390 Valve for controlling fluids 6 2002
 
SIEMENS AKTIENGESELLSCHAFT (1)
6,062,533 Apparatus and method for valve control 45 1999
 
SMC CORPORATION (1)
6,345,803 Piezoelectric fluid control valve 5 2001
 
SMC KABUSHIKI KAISHA (1)
6,520,479 Flow rate control valve 9 2000

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