Measuring and testing – Sampler – sample handling – etc. – Analyzer supplier
Patent
1985-11-01
1987-04-28
Levy, Stewart J.
Measuring and testing
Sampler, sample handling, etc.
Analyzer supplier
G01N 100
Patent
active
046604243
ABSTRACT:
A metering valve for extracting a given volume of fluid from a first fluid flow and introducing the thus extracted volume of fluid to a second fluid flow, comprising a stationary valve component provided with a first and a second supply channel and a first and a second discharge channel, and a metering component which can be rotated relative to the stationary valve component and which incorporates a metering channel of the aforementioned given volume. In accordance with the invention, the valve component (2) has a planar surface (9) into which the aforementioned supply and discharge channels open out. The metering component (7) also includes a planar surface (10) which abuts against the planar surface (9) of the valve component (2) and into which the two ends of the metering channel open out. These ends are so located that in the first position of rotation of the metering component (7) in relation to the valve component (2) they connect the first supply channel with the first discharge channel of the valve component (2) and in a second position of rotation connect the second channels of the valve component (2).
REFERENCES:
patent: 3475950 (1969-11-01), Ferrin
patent: 4059009 (1977-11-01), Ball et al.
patent: 4152391 (1979-05-01), Cabrera
patent: 4411575 (1983-10-01), Miller
patent: 4476731 (1984-10-01), Charney et al.
Alperstein, "A Gas Sampling and Injection Valve for Vacuum Service", Analytical Chemistry, 1966, p. 366.
Lars Ljungberg, Lab Trade AB
Levy Stewart J.
Raevis Robert R.
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