The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 1976
Filed:
Sep. 09, 1974
Rano J Harris, Sr, Baton Rouge, LA (US);
Rano J Harris, Jr, Baton Rouge, LA (US);
Other;
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needle portion thereof through the inlet of the analytical instrument, the sample is then injected, and the needle then withdrawn.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.