Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition
Reexamination Certificate
2007-06-12
2007-06-12
Gordon, Brian R. (Department: 1743)
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
C422S105000, C422S093000, C436S180000, C436S053000, C222S335000, C222S399000
Reexamination Certificate
active
10240031
ABSTRACT:
The invention provides a device for dispensing accurately-controlled small quantities of at least one liquid, comprising a liquid supply (L); a gas supply (G), arranged to selectively supply a gas pressure; and a capillary duct (20) adapted to be filled with liquid to be dispensed, and to eject the liquid. The device has a filling configuration wherein liquid from the supply is in contact with an end (20a) of the capillary duct to fill the capillary duct with liquid; and a liquid separation and ejection configuration, in which liquid remaining in the liquid supply is separated from liquid that fills the capillary duct to form a discrete quantity (V) of liquid filling the capillary duct (20) out of contact with the remaining liquid of the liquid supply. The capillary duct, filled with this discrete quantity (V) of liquid then has one end in contact with the gas supply and another end in contact with the atmosphere. The discrete quantity of liquid (V), forming an exact dose of liquid to be dispensed, is ejectable from the second end (20b) of the capillary duct by the application of gas pressure.
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Copy—11 pages McNeely, et al—“Hydrophobic Microfluidics”, 1999 SPIE Article—shown on original Information Disclosure Statement by Applicant—filed with application on Sep. 26, 2002.
Donzel Alain
Renaud Philippe
Gordon Brian R.
Parabol Technologies S.A.
Sturm & Fix LLP
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