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US 4,857,053 AGranted
Matrix septum
OwnerMichael J. Daltoninventor
Life of this patent
Estimating the term…
Abstract
A matrix septum material, especially useful in medical applications such as implantable drug delivery devices, is provided by retaining a penetrable, resilient, elastomer under compression between webs having peripheries which frame perforations to form individual, self-sealing cells in the matrix.
Claims20
A matrix septum material which comprises
- at least one penetrable, resilient, elastomeric layer having front and back faces;
- a plurality of webs having perforations with peripheries, each web in contact with at least one layer face;
- together with
- means for urging said webs toward each other, compressing said layer without substantially obstructing said perforations;
- whereby each perforation frames an individual penetrable, self-sealing cell in the matrix septum.
2 more elements
In an implantable drug-delivery device of the type to which a drug is added with a needle through a septum, the improvement therein which comprises including in the device a needle-penetrable, self-sealing matrix septum which includes
- at least one penetrable, resilient, elastomeric, medically acceptable layer having front and back faces;
- a plurality of webs having perforations with peripheries, each web in contact with at least one layer face;
- together with
- means for urging said webs toward each other, thereby compressing said layer without substantially obstructing said perforations;
- whereby each perforation frames an individual penetrable, self=sealing cell in the matrix septum.
2 more elements
An implantable drug delivery device which comprises
- a drug reservoir;
- an outlet from said reservoir;
- and
- a needle penetrable, self-sealing septum inlet into said reservoir, said septum comprising
- at least one penetrable, resilient, elastomeric, medically acceptable layer having front and back faces;
- a plurality of webs having perforations with peripheries, each web in contact with at least one layer face;
- together with
- means for urging said webs toward each other, thereby compressing said layer without substantially obstructing said perforations.
5 more elements
Dependencies are inferred from the claim text.