Multi-size injector port system

Details Multi-size injector port system Multi-size injector port system

1987-11-03

1988-12-20

Levy, Stewart J.

Liquid purification or separation

With means to add treating material

Chromatography

55386, 210656, B01D 1508

Patent

active

047923962

ABSTRACT:
A frame is described, that is part of an injector which is used to load a sample at high pressure into a chromatographic column, wherein a tube coupling hole in the frame can not only couple to a standard 1/16th inch tube, but can also couple to a much smaller diameter tube which is useful for minimizing dispersion when small samples or small chromatographic columns are used. The tube coupling hole has a cylindrical inner end portion of a diameter substantially equal to the smaller tube diameter to closely receive it, a tapered middle portion, and a threaded outer portion. Ferrules for sealing tubes to the tapered hole portion, include a first ferrule having a hole that closely surrounds the smaller diameter tube, with the end of the tube lying in the cylindrical inner end portion. A second ferrule has a hole that closely surrounds the standard size larger tube, the tip of the larger tube lying against the tapered hole portion.

REFERENCES:
patent: 4026803 (1977-05-01), Abrahams et al.
patent: 4083702 (1978-04-01), Hartigan et al.
patent: 4182184 (1980-01-01), Bakalyar et al.
patent: 4242909 (1981-01-01), Gundelfinger

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