Automatic fluid injector

Details Automatic fluid injector Automatic fluid injector

1974-09-09

1976-03-02

Swisher, S. Clement

Measuring and testing

Measuring vessel

73423A, G01N 114

Patent

active

039409953

ABSTRACT:
Am 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, which includes the general combination of (a) an injector, or syringe assembly, inclusive of a needle syringe per se, (b) an injector feed assembly for automatically continuously purging, cleaning and filling the said syringe, and (c) a magazine, or feed tray, for transporting fluid specimen containing vials to the injector feed assembly for pick-up of the fluid specimen, and delivery to the syringe of the syringe assembly. Means are provided for movement of the syringe along a straight path for insertion and withdrawal of the needle from the inlet of the analytical instrument, and a reciprocable hollow probe, associated with the injector feed assembly picks up a fluid specimen from a fluid-containing vial delivered by the magazine or feed tray, and conveys the fluid to the syringe of the syringe assembly. The forward end of the barrel of the syringe is provided with a valved line through which an initial portion of the fluid specimen is passed to remove contaminants from previous specimens. An accurately measured portion of the fluid specimen is taken into the syringe by withdrawal of the plunger to a predetermined position, with the valved line in open or closed position; but the valve is closed prior to injection. The syringe is carried forward to insert the needle portion thereof through the inlet of the analytical instrument, the sample is then injected, and the needle then withdrawn. The several sub-assemblies are properly housed, and automatic controls provide for cyclically cleaning, purging, filling and injecting fluid specimens.

REFERENCES:
patent: 3754443 (1974-08-01), Harris et al.
patent: 3824859 (1974-07-01), Harris et al.
patent: 3841160 (1974-10-01), Iwao

Affiliated with

Also associated with

Rating

Automatic fluid injector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic fluid injector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic fluid injector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1270987