Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1985-09-10
1986-11-04
Levy, Stewart J.
Measuring and testing
Sampler, sample handling, etc.
Capture device
G01N 3504
Patent
active
046204520
ABSTRACT:
A liquid sample injecting apparatus wherein a liquid sample is drawn by suction when a sample needle is moved to a lower position and the liquid sample drawn by suction is fed into a chromatographic column by using a carrier solvent when the sample needle is moved to an upper position. The apparatus is provided with seal members capable of providing a satisfactory seal to the outer peripheral surface of the sample needle by utilizing the high pressure of the carrier solvent when the carrier solvent is allowed to flow through the bore of the needle. When the sample needle is moved between the two positions, the high pressure of the carrier solvent applied to the outer peripheral surface of the sample needle is removed to reduce the frictional resistance offered to the outer peripheral surface of the sample needle, to thereby facilitate the movement of the sample needle.
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patent: 3530721 (1970-09-01), Hrdina
patent: 3552441 (1971-01-01), Luhleich
patent: 3918913 (1975-11-01), Stevenson et al.
patent: 4094195 (1978-06-01), Friswell et al.
patent: 4476734 (1984-10-01), Banks et al.
patent: 4478095 (1984-10-01), Bradley et al.
patent: 4558603 (1985-12-01), Chlosta et al.
Japanese Unexamined Pub. No. 36791/79.
Japanese Unexamined Pub. No. 134494/78.
Hitachi , Ltd.
Levy Stewart J.
Roskos Joseph W.
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