Size-efficient drug-delivery device
First Claim
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1. A drug delivery device comprising a substantially cylindrical drug-reservoir assembly, said substantially cylindrical drug-reservoir assembly comprising:
- a collapsible semi-flexible drug reservoir chamber, the chamber having an interior defined by a flexible upper wall, a rigid base wall and a joint region between said flexible upper wall and said rigid base wall;
a housing;
a rigid constraining ring, which constraining ring substantially surrounds outer boundaries of the flexible upper wall, the rigid base wall or a combination thereof of said collapsible semi-flexible drug reservoir chamber, and wherein;
the constraining ring is disposed within the housing,the constraining ring is separate from the housing, andthe constraining ring is separate from the rigid base wall;
a drug administration unit in fluid communication with said semi-flexible drug reservoir chamber; and
a displacement-generating actuator, located proximally to said semi-flexible drug reservoir chamber, wherein the displacement-generating actuator moves perpendicular to a patient skin surface upon which the drug delivery device is placed;
whereby displacement generated by said displacement-generating actuator operationally connected to said semi-flexible drug reservoir chamber, causes said flexible upper wall to collapse, promotes folding or rolling of said flexible upper wall between the displacement actuating generator and the constraining ring as said flexible upper wall collapses against the rigid base wall of said semi-flexible drug reservoir chamber within the constraints of said rigid constraining ring surrounding a circumference of said flexible upper wall, which further causes substantially expelling drug contents of said semi-flexible drug reservoir chamber toward said drug administration unit thereby delivering said drug contents from said drug delivery device.
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Abstract
A drug-delivery device comprising a drug-reservoir assembly, displacement-generating actuator, and drug administration unit is described, wherein the drug-reservoir assembly comprises at least one flexible wall and a constraining ring, such that the displacement generated by the actuator collapses a flexible wall of the assembly expelling the drug contents of the drug-reservoir towards said drug administration means.
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Citations
26 Claims
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1. A drug delivery device comprising a substantially cylindrical drug-reservoir assembly, said substantially cylindrical drug-reservoir assembly comprising:
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a collapsible semi-flexible drug reservoir chamber, the chamber having an interior defined by a flexible upper wall, a rigid base wall and a joint region between said flexible upper wall and said rigid base wall; a housing; a rigid constraining ring, which constraining ring substantially surrounds outer boundaries of the flexible upper wall, the rigid base wall or a combination thereof of said collapsible semi-flexible drug reservoir chamber, and wherein; the constraining ring is disposed within the housing, the constraining ring is separate from the housing, and the constraining ring is separate from the rigid base wall; a drug administration unit in fluid communication with said semi-flexible drug reservoir chamber; and a displacement-generating actuator, located proximally to said semi-flexible drug reservoir chamber, wherein the displacement-generating actuator moves perpendicular to a patient skin surface upon which the drug delivery device is placed; whereby displacement generated by said displacement-generating actuator operationally connected to said semi-flexible drug reservoir chamber, causes said flexible upper wall to collapse, promotes folding or rolling of said flexible upper wall between the displacement actuating generator and the constraining ring as said flexible upper wall collapses against the rigid base wall of said semi-flexible drug reservoir chamber within the constraints of said rigid constraining ring surrounding a circumference of said flexible upper wall, which further causes substantially expelling drug contents of said semi-flexible drug reservoir chamber toward said drug administration unit thereby delivering said drug contents from said drug delivery device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification