Automatic fluid injector

Details Automatic fluid injector Automatic fluid injector

1975-10-01

1977-01-04

Swisher, S. Clement

Measuring and testing

Measuring vessel

73423R, G01N 102

Patent

active

040006549

ABSTRACT:
An improved automatic fluid injector, or syringe, for accurately measuring and injecting quantities of fluid specimens, or samples, into various media, e.g., a receptacle or inlet of a modern analytical instrument. The apparatus includes the general combination of (a) an injector, or syringe sub-assembly, inclusive of a needle syringe provided with a forward mounted needle and rearwardly mounted reciprocable plunger, (b) an injector feed sub-assembly provided with a reciprocable hollow probe, or probes, for pick-up of a fluid specimen for use in purging, cleaning and filling said syringe, and (c) a magazine, or feed tray, for transporting fluid specimen containing vials and positioning same relative to the injector feed assembly for pick-up of the fluid specimen, and delivery to the syringe. Sub-assembly (a), inclusive of a plunger actuation means, is mounted upon a plate slidable upon a base plate, and means are also mounted upon said base plate for actuation and reciprocation of said slide plate for thrust of the dispensing end of the needle of the syringe into a tubular member, provided with a sealed entry feature, adjacent the inlet to the analytical instrument. Sub-assemblies (b) and (c) are also mounted upon the base plate, sub-assembly (b) picking up a fluid specimen from (c) for delivery to said tubular member at which location fluid specimen is transferred to the syringe of sub-assembly (a).

REFERENCES:
patent: 3401565 (1968-09-01), Stoll et al.
patent: 3841160 (1974-10-01), Iwao
patent: 3885438 (1975-05-01), Harris et al.

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