Fluid sprinkling – spraying – and diffusing – With means to vibrate or jiggle discharge
Reexamination Certificate
2005-05-31
2005-05-31
Mar, Michael (Department: 3752)
Fluid sprinkling, spraying, and diffusing
With means to vibrate or jiggle discharge
Reexamination Certificate
active
06899283
ABSTRACT:
A liquid droplet ejection method and apparatus comprising a base member and a piezoelectric/electrostrictive element. The interior of the base member includes a pressurizing chamber and an ejection opening. When the interval from the last pressurizing operation to the current pressurizing operation exceeds a predetermined time, applied voltage to the piezoelectric/electrostrictive element is increased at a first increase rate so that liquid within the pressurizing chamber is pressurized for ejection at a first pressurizing increase rate. When the interval from the last pressurizing operation to the current pressurizing operation is shorter than the predetermined time, the applied voltage is increased at a second increase rate smaller than the first increase rate so that the liquid is pressurized for ejection at a second pressurizing rate which is relatively small. This ensures proper pressurization of a liquid whose viscosity increases over time, achieving proper ejections.
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Patent Abstracts of Japan, vol. 2002, No. 02, Apr. 2, 2002 & JP 2001 270111 A (Seiko Epson Corp.), Oct. 2, 2001 *abstract*.
Hirota Toshikazu
Iseki Yoshihiro
Ohnishi Takao
Bui Thach H.
Burr & Brown
Mar Michael
NGK Insulators Ltd.
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