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US 4,071,319 AGranted
Contaminant detector
AssigneeBecton, Dickinson and Company
InventorEdward L. Nugent
Life of this patent
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Abstract
Apparatus for the detection of contaminants in fluids. In the simplest embodiment, the apparatus comprises a vacuum tube having indicator means disposed therein for the detection of a fluid-borne contaminant and a self-sealing, cannula-penetrable closure. The apparatus is operated by piercing the closure with a cannula to draw the fluid for testing into the vacuum chamber.
Claims6
Apparatus for the detection of fluid-borne contaminants, which comprises:
- a. a first tubular container having a portal therein;
- b. a self-sealing, gas-proof, cannula-penetrable closure mounted in said portal, said closure together with said first tubular container defining a hermetically sealed chamber;
- c. a partial vacuum in said chamber;
- d. a second tubular container mounted in said first tubular container and having one end in open communication with said chamber and the other end closed by said closure;
- and
- e. an indicator for the presence of said contaminants disposed in said second tubular container.
3 more elements
Dependencies are inferred from the claim text.