Valve with self-sealing internal cannula
AssigneeGeorge Braddock Ogle, II
InventorGeorge B. Ogle, II
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Abstract
A valve insert includes an elongated cannula with first and second sharp ends. First and second elongated, flexible, elastomeric covers are respectively disposed over the first and second sharp ends of the cannula. Each cover is secured to an intermediate part of the cannula and is made of a material penetrable by the sharp ends of the cannula as the cannula moves longitudinally relative to the covers. The insert is mounted in an elongated bore through a valve body so that when a hypodermic syringe nozzle is inserted inito one end of the bore, the cannula and covers are displaced longitudinally, causing the sharp ends of the cannula to pierce the covers and open the cannula for fluid flow.
Claims23
A self-sealing valve insert comprising:
- an elongated cannula having first and second shap ends;
- and
- first and second elongated, flexible, resilient, elastomeric covers each disposed respectively over the first and second sharp ends of the cannula, each cover being secured to an intermediate portion of the cannula to provide a closed envelope over a respective adjacent sharp end of the cannula, and made of a material which is penetrable by the sharp ends of the cannula;
- each cover, from where it is over a respective adjacent shape end of the cannula to a point adjacent where each cover is secured to the cannula, making a loose fit around the cannula so when a force is applied to the covers to move them relative to the cannula and toward each other, the covers are compressed, and each is penetrated by the respective adjacent sharp end of the cannula, and so when force is removed, each cover is free to expand back to its original rest position to form a seal over a respective adjacent sharp end of the cannula.
A valve comprising:
- an elongated body with a bore extending longitudinally through it to form an inlet at one end of the body and an outlet at the other end of the body;
- an elongated cannula disposed in the bore to be movable longitudinally relative to the body, the cannula having first and second sharp ends respectively disposed adjacent the inlet and the outlet;
- first and second elongated, flexible, resilient, elastomeric covers respectively disposed over the first and second sharp ends of the cannula, each cover being secured to an intermediate part of the cannula to form a separate respective closed envelope over a respective sharp end, the covers being made of a material penetrable by the sharp ends;
- and
- means for limiting the travel of the cannula and the second cover in a direction toward the outlet when a tubular element enters the inlet and pushes the first cover and cannula toward the outlet and cause each sharp point to penetrate the respective surrounding cover.
Dependencies are inferred from the claim text.