Pleated expandable reservoir for a wearable drug delivery device
AssigneeInsulet Corporation
InventorsMaureen Mccaffrey, Daniel Allis
Life of this patent
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Abstract
Disclosed herein are various embodiments providing an expandable, flexible reservoir for use in a wearable drug delivery device. The reservoir comprises a flexible enclosure made with plastic film which incorporates pleats forming the side walls thereof to increase the volume efficiency and to avoid a “pillowing” effect when the reservoir is filled. The pleats may be formed at non-right angles with respect to each other such as to form a curved side walls for the reservoir. In variations of the invention, various methods are disclosed for maintaining a vacuum with the reservoir during its shelf life.
Claims18
A reservoir comprising:
- a top surface;
- a bottom surface;
- and
- a plurality of pleats forming one or more side walls connecting the top surface and the bottom surface;
- wherein the top surface, the bottom surface and the plurality of pleats are composed of a film having high air and water vapor barrier properties.
A reservoir comprising:
- an enclosure formed of a film having high air and water vapor barrier properties;
- a fluid port, defined in the enclosure;
- and
- a hermetic seal sealing the fluid port;
- wherein the hermetic seal is mechanically weak such that a pressure applied to the hermetic seal via a fluid path coupled to the fluid port will cause the hermetic seal to break to enable fluid communication between the fluid path and the enclosure.
A reservoir comprising:
- an enclosure formed of a film having high air and water vapor barrier properties;
- a fluid port, defined in the enclosure;
- a fluid path, coupled to the fluid port;
- a foil strip bonded to the enclosure such as to seal the fluid port;
- and
- a rod, coupled to the foil strip and disposed in the fluid path.
Dependencies are inferred from the claim text.