Dual pad liquid shear valve assembly
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 29, 2005
Grant Date -
Feb 6, 2003
app pub date -
Jun 28, 2001
filing date -
Jun 28, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A shear valve assembly comprises a pair of valve pads having opposing planar surfaces supported for relative sliding engagement. Each valve pad defines a plurality of liquid pathways by which a liquid can be passed from one pad to the other. The planar surface of one of the valve pads has an open channel formed therein, such channel having dimensions to accommodate a prescribed volume of liquid. Liquid is introduced into such channel via a first pair of pathways formed in the other valve pad, and liquid is dispensed from the open channel by a second pair of pathways that are brought into alignment with the channel during sliding movement between the valve pads. The valve assembly is particularly useful in blood-analyzing instruments for isolating and dispensing relatively minute volumes (of the order of microliters) of whole blood for analysis.
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Cited Art Landscape
Patent Citation Ranking
- 5 Citation Count
- F16K Class
- 4.84 % this patent is cited more than
- 20 Age
