US 5,397,026 AGranted

Method for discharging contents of a sealed container

AssigneeHelena Laboratories Corporation

InventorRonald A. Mayes

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Abstract

An improved method and apparatus for discharging the contents of a test tube which has a resilient self-sealing, reusable stopper at one end. The apparatus includes a flexible member that has a constricted end and a second end. The constricted end defines an outlet area that has an opening. A support having an aperture is disposed proximate to the flexible member. The interior of the flexible member defines a cavity. The apparatus further includes a single fluid transfer tube having a longitudinal bore. The fluid transfer tube has a sharpened end for insertion into and through the seal of the test tube and an outlet end that extends into the aperture. The longitudinal bore establishes a fluid flow path from the sharpened end to the outlet end. When the fluid transfer tube is inserted into the seal of the test tube, the interior of the sealed test tube and the outlet area opening are in fluid communication.

Claims3

Dependent claims

A method for dispensing fluid from a repuncturable, sealed test tube using a dispenser having first and second ends, a flexible member, a single fluid transfer tube, and an outlet, comprising:

inserting said first end of the dispenser through the seal of a test tube which contains fluid to be dispensed;
blocking said dispenser outlet to prevent the flow of fluid therethrough;
inverting said dispenser and the attached test tube such that the fluid contained within the test tube reaches a level above said first end of said dispenser;
compressing said flexible member such that air contained within said flexible member is forced through said fluid transfer tube into the test tube;
unblocking said dispenser outlet;
and
compressing said flexible member wherein some of the air contained within said flexible member is forced through said single fluid transfer tube into the test tube, and some of the fluid contained within the test tube is simultaneously pumped in the opposite direction through said single fluid transfer tube and into said flexible member, and wherein some of the fluid contained within said flexible member is simultaneously transferred outwardly of said dispenser.

4 more elements

Dependencies are inferred from the claim text.