Measuring and testing – Sampler – sample handling – etc. – Analyzer supplier
Patent
1985-06-19
1988-02-23
Levy, Stewart J.
Measuring and testing
Sampler, sample handling, etc.
Analyzer supplier
7386373, G01N 110
Patent
active
047262370
ABSTRACT:
A transfer valve system, method and apparatus are disclosed having a three element valve with a central element sandwiched between front and rear outer elements. Between an aspiration and a discharge position the front and rear outer elements are moved in opposite directions of unequal distances in the same direction with respect to the central member or one outer member and the central member are moved in the same or opposite direction with respect to the other outer member so long as the outer members end up shifted with respect to each other. In the aspiration position, two sample segments are contained in series within the valve. In one embodiment of the invention, one segment is contained within a conduit in the central member and the other segment is contained within a passageway in the rear member. In another embodiment of the invention, the two segments are contained within different conduits of the central member.
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Levy Stewart J.
Raevis Robert R.
Sequoia-Turner Corporation
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