Automatic fluid injector, and magazine therefor

Details Automatic fluid injector, and magazine therefor Automatic fluid injector, and magazine therefor

1977-07-21

1978-10-24

Swisher, S. Clement

Measuring and testing

Measuring vessel

73423A, G01N 114

Patent

active

041214650

ABSTRACT:
A new and improved magazine for use in automatic fluid injectors, and novel fluid injector for use in accurately measuring and injecting preselected quantitites of fluid specimens, or samples, into various media, e.g., a receptacle or septum inlet of a modern analytical instrument. In its preferred aspects, the invention is comprised of a new and novel magazine-injector combination. The combination is comprised of (a) a fluid injector sub-assembly, inclusive of a barrel on one end of which is mounted a hollow needle providing an opening from the dispensing end of said needle through said needle and barrel, and on the other end valve means for opening the barrel to permit the ingress of fluid specimen into said barrel and needle and for closure of said barrel to interrupt the flow of fluid specimen through said barrel and needle, (b) an injector feed sub-assembly, inclusive of a probe assembly comprising a gas supply conduit with gas inlet and gas outlet means, a fluid specimen supply conduit with fluid specimen inlet means, and outlet means connected to the barrel and operatively associated with the valve means of said fluid injector sub-assembly, and means for puncturing the septum of the fluid specimen containing vial so that the gas supply and fluid specimen supply conduits can enter into and be within the vial, and (c) said magazine.
The magazine is comprised of a closed loop, flexible roller chain upon which fluid vials are carried or transported, in seriatim, past a station for pick-up by the probe assembly of (a) the fluid injector sub-assembly for transfer to the barrel of (b) the injector feed sub-assembly.

REFERENCES:
patent: 2698076 (1954-12-01), Nilsson
patent: 3940995 (1976-03-01), Harris, Sr. et al.
patent: 4039286 (1977-08-01), Keller

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