Injection molded cannula system
AssigneeRoche Diabetes Care, Inc.
InventorsMads Bjoern Rasmussen, Christian Freitag
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Abstract
Disclosed is a cannula system having a soft cannula and a cannula unit for holding the soft cannula. The cannula unit includes a compressor and a body, and the body contains a mounting structure and a cavity for holding a septum. The soft cannula is threaded on the mounting structure. Furthermore, the compressor circumferentially surrounds the mounting structure and at least parts of the body. The compressor contains an internal material tension for exerting a compression force on the soft cannula and the mounting structure.
Claims16
A method for manufacturing a cannula system, comprising:
- providing a body having a mounting structure, the body being mounted onto a molding core pin;
- threading a soft cannula on the mounting structure of the body;
- injection molding a compressor on the soft cannula and at least part of the body, wherein the compressor circumferentially surrounds the mounting structure, at least part of the soft cannula and at least part of the body whereby the compressor forms a bonded connection with the at least part of the soft cannula and the at least part of the body;
- cooling the compressor to thereby provide an internal material tension of the compressor;
- and
- removing the molding core pin.
A cannula system, comprising:
- a soft cannula;
- and
- a cannula assembly for holding the soft cannula, wherein the cannula assembly comprises a compressor and a body and wherein the body further comprises a mounting structure and a cavity configured to hold a septum;
- wherein, the soft cannula is threaded onto the mounting structure and the compressor circumferentially surrounds the mounting structure and at least part of the body;
- wherein, the compressor comprises an internal material tension configured for exerting a compression force on the soft cannula and the mounting structure;
- and
- wherein the body and the compressor are connected by a bonded connection formed by injection molding the compressor on the at least part of the body and wherein the soft cannula and the compressor are connected by a bonded connection formed by injection molding the compressor on the soft cannula where the compressor circumferentially surrounds the mounting structure.
Dependencies are inferred from the claim text.