Two-compartment storage and transfer flask

Details Two-compartment storage and transfer flask Two-compartment storage and transfer flask

1991-08-28

1994-09-20

Hafer, Robert A.

Surgery

Container for blood or body treating material, or means used...

604415, 604416, A61J 100

Patent

active

053485483

DESCRIPTION:

BRIEF SUMMARY
The present invention concerns a dual compartment storage and transfer bottle designed to store two components of a medicinal substance, at least one of which is in the liquid state, and to transfer this substance directly or after mixing it with another substance into a utility device, said bottle comprising at one end a narrow open neck and a sealing device engaged in said neck, and at the other end, a narrow region sealed during the storage phase by a movable intermediate seal designed to separate the two compartments and to isolate the two components from each other, said sealing device comprising an elastomeric sealing member engaged in the narrow neck and designed to be displaceable between a first position, known as the storage position, during a storage phase in which it constitutes a tight seal, and a second position, known as the utility position, during a utility phase in which it allows said medicinal substance to be evacuated, and a rigid capsule partially engaged inside the narrow neck and attached to said sealing member.
Various bottles of this type are known in which changing from the storage position to the utility position necessitates ejecting the movable intermediate seal toward the lower compartment to mix the components which are respectively stored in the upper compartment and in the lower compartment during the storage phase. In this type of bottle, the upper compartment is completely filled with a substance in liquid state and the pressure exerted on the sealing member to make it pass from its sealing position to its storage position is integrally transmitted to the movable intermediate seal by this liquid substance. For certain applications this construction is too complicated and too costly and unsuitable, given the fact that the upper compartment may be completely or partially filled, or filled with a powder. For this reason, rigid devices are provided in certain embodiments to activate the bottle, that is, to push back the movable intermediate seal. The presence of these rigid devices generally constitutes a disadvantage because they are in contact with the component held in the upper compartment and cause considerable problems of compatibility between the medicinal substance and the synthetic material from which the rigid devices are made.
The present invention proposes to resolve this problem by realizing a bottle which can be made simply and economically and can be used for storage and application of any type of medicinal substance without posing any problem of compatibility between the substances stored in the bottle and the bottle components.
To achieve this, the bottle according to the invention is characterized in that the elastomeric sealing member has one sealing section with an outside diameter essentially equal to the inside diameter of the narrow neck to ensure that the bottle seals at the neck level during the storage phase, and an extension prolonging the sealing section through the upper compartment defined by the sealing section and the movable intermediate seal to ensure mechanical connection between the capsule and said seal.
According to a preferred embodiment, this bottle may comprise a rigid element attached inside the extension of the sealing member, said rigid element being integral with the capsule.
Preferably this rigid element consists of a central shaft forming one piece with the capsule, or may be a separate piece positioned between the capsule and the extension of the sealing member.
According to this embodiment of the bottle the sealing section of the sealing member comprises at least one radial opening sealed by the interior wall of the narrow neck during the storage phase and open toward the inside of the upper compartment during the utility phase.
Advantageously, when the capsule comprises a tube shaped end tip, this tip has a sealing valve urged by a spring.
This spring preferably contacts the rigid element, said rigid element being associated with a disc in contact with the capsule base and serving as a support for said spring.
Said disc may c

REFERENCES:
patent: 2764983 (1956-10-01), Barasch
patent: 3734098 (1973-05-01), Schneller et al.
patent: 4031892 (1977-06-01), Hurschman
patent: 4234083 (1980-11-01), Cohen
patent: 4550825 (1985-11-01), Sutryn et al.
patent: 4589879 (1986-05-01), Pearson
patent: 4871354 (1989-10-01), Conn et al.
patent: 4927013 (1990-05-01), Van Brunt et al.
patent: 4950237 (1990-08-01), Henault et al.
patent: 5056676 (1991-10-01), Allen et al.

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