Dispensing – Processes of dispensing
Reexamination Certificate
2005-11-01
2005-11-01
Kaufman, Joseph A. (Department: 3754)
Dispensing
Processes of dispensing
C222S063000, C222S072000, C222S318000, C222S397000
Reexamination Certificate
active
06959836
ABSTRACT:
The invention relates to a dispensing device and a method for dispensing liquids, preferably reagents, in an essentially automated and finely dosed manner. The dispensing device comprises a first duct that is connected to a storage element for storing the liquid to be dispensed. In addition, a conveying element for conveying the liquid through the fist duct is provided, whereby the liquid has to be dispensed. Liquid is transported from the storage element and is conveyed into the first duct by the conveying element. Moreover, the dispensing device is provided with a closing device that is arranged downstream in the conveying direction of the liquid in relation to the conveying element and serves for quickly closing and quickly opening the first duct. The aim of the invention is to regulate the pressure of the liquid in the region between the conveying element and the closing device. A device for regulating the pressure of the liquid in this region is provided. Liquids can be very exactly and repeatedly dispensed in short time intervals by means of the inventive device and the inventive method. In another embodiment of the invention, a dispensing element is provided for evenly dividing the liquid stream into partial streams.
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Collasius Michael
Di Berardino Marco
Fink Pius
Lutze Konstantin
Kaufman Joseph A.
Qiagen-GmbH
Wesolowski Michael R.
Yankwich Leon R.
Yankwich & Associates P.C.
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