Measuring and testing – Sampler – sample handling – etc. – Capture device
Reexamination Certificate
2006-09-08
2009-10-27
Rogers, David A. (Department: 2856)
Measuring and testing
Sampler, sample handling, etc.
Capture device
C222S071000
Reexamination Certificate
active
07607363
ABSTRACT:
The present invention discloses a liquid volumetric device comprising a metering tube, a start sensor, an end sensor, a bath for storage of a sample to be metered, a vacuum chamber and a pump for pumping out air inside the vacuum chamber to form a negative pressure inside the vacuum chamber. The start sensor and the end sensor are provided respectively at the bottom and the top of the metering tube, the top of the metering tube is in communication respectively with the vacuum chamber and the outside atmosphere via pipelines, the bottom of the metering tube is in communication respectively with the bath and the vacuum chamber via pipelines, and control parts are provided in each of the pipelines for controlling connection/disconnection thereof. Thus, by forming a negative pressure inside the vacuum chamber, a sample in the bath may be pressed from down to up into the metering tube by means of a pressure difference between the atmosphere and the negative pressure, so as to complete the volume metering, whereby an occurrence of the side flow phenomenon can be completely eliminated.
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English translation of abstracts for CN85204477U reference above.
English translation of abstracts for FR2756628 reference above.
Li Liangqing
Zhang Cheng
Zhang Yaohui
Rogers David A.
Shenzhen Mindray Bio-Medical Electronics Co., Ltd.
Vista IP Law Group LLP.
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