Dispensing – Automatic control – Material level control
Reexamination Certificate
2007-12-04
2007-12-04
Nicolas, Frederick C. (Department: 3754)
Dispensing
Automatic control
Material level control
C222S069000, C222S143000, C222S333000, C222S385000, C222S481500, C417S044900, C417S283000, C417S306000, C417S423300
Reexamination Certificate
active
11142620
ABSTRACT:
A liquid delivery system includes a first reservoir having a first outlet through which liquid is delivered. A first delivery outlet is located at the lower portion of the first reservoir and a vent is included at its upper portion. A second reservoir located above the first reservoir and has a second outlet located in its lower portion. A first delivery conduit connects the second outlet to the first reservoir and a second delivery conduit connects the upper portion of the first reservoir with the upper portion of the interior of the second reservoir. A vent valve controls communication through the second delivery conduit. A level sensor senses the level of liquid in the first reservoir and causes the vent valve to open when the liquid falls below a first predetermined level and to close the vent valve when on the level rises above a second (higher) predetermined level.
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Derwent Abstract Accession No. 95-059306/08 & SU 1831467, 1993.
Merchant & Gould P.C.
Nicolas Frederick C.
The Water Corporation
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