Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1983-06-09
1985-04-02
Swisher, S. Clement
Measuring and testing
Sampler, sample handling, etc.
Capture device
422103, B01L 302
Patent
active
045079773
ABSTRACT:
A liquid diluting valve assembly for delivering a pair of different sample volumes in the microliter range along with a predetermined volume of diluent to different locations. The valve assembly includes a pair of outer discs and an inner disc sandwiched therebetween, the facing surface portions being sealingly frictionally engaged. The discs have central axial passages aligned to accommodate a spindle the inner disc being independently movable relative to the other discs. The discs carry passageways with at least one segmenting passageway provided in the inner disc. One of the outer discs is stationary and carries an external hollow loop having a precise volume in the microliter range. The other outer disc carries a single outwardly extending aspirator probe for introduction of a liquid sample from an exterior sample source, the probe being coupled in series with the external hollow loop.
After a continuous stream of sample is disposed through the serially connected segmenting passageway and loop, the inner member is rotated to place the content of the segmenting passageway in communication with an exterior source of diluent and a passage leading to the exterior of the valve assembly for delivery of the resulting dilution to a selected location. Backwash may be effected by reverse rotation of the inner disc.
REFERENCES:
patent: 3991055 (1976-11-01), Godin
patent: 4152391 (1979-05-01), Cabrera
patent: 4387076 (1983-06-01), Cabrera et al.
patent: 4445391 (1984-05-01), Cabrera
Coulter Electronics Inc.
Swisher S. Clement
LandOfFree
Liquid metering and transfer valve assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid metering and transfer valve assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid metering and transfer valve assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1085570