Flat-sided fluid dispensing device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Apr 9, 2002
Grant Date -
N/A
app pub date -
Feb 28, 2000
filing date -
Feb 28, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A low cost digitally operated dispenser apparatus and method of operation and construction is obtained by combining flat sided, preferably rectangular tubular capillary tube having an orifice, with a flat elongated strip of piezoelectric material. Microdroplets are dispensed from an internal chamber within the capillary tube, or a separate feed supply, upon application of voltage pulses through electrodes connected to conductive layers on the piezoelectric material. The piezoelectric strip may be parallel to the flat capillary tube or perpendicular to it. On a variation, a fixture can be used to improve performance in combination with the capillary tube and piezoelectric strip. A standoff strip allows the piezoelectric operator to be thermally isolated from a flat rectangular capillary tube.
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