Method and system for precise dispensation of a liquid
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United States of America Patent
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Aug 21, 2007
Grant Date -
Jan 13, 2005
app pub date -
Apr 30, 2004
filing date -
Apr 30, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
Devices, systems, and methods for the precise dispensation of small volumes of liquids are presented. A fluid microdispenser comprises a liquid-filled tube, an actuator coupled to the tube, and a tip at one end of the tube. When the actuator applies an actuation pressure, a precise volume of liquid is ejected from the orifice of the tip. The orifice is manufactured to control the volume of liquid ejected by each actuation and, therefore, may have a diameter smaller than that of the liquid-filled tube. The invention comprises systems, methods, and devices so that the inner diameter of the liquid-filled tube is decreased (tapered) to that of the orifice so as to maximize transmission to the orifice of the pressure generated by the actuation stimulus. This enables the volume of liquid ejected by each stimulus to be reproducibly controlled by the amplitude of the actuation stimulus.
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