Sealing assembly and structure for a fluid infusion device having a needled fluid reservoir

摘要

A sealing assembly is utilized for a fluid infusion device that cooperates with a fluid reservoir having a reservoir port and a hollow fluid reservoir needle at least partially located within the reservoir port. The sealing assembly has a reservoir port receptacle with a proximal end, a distal end extending from the proximal end, and a needle opening formed in the distal end to receive the hollow fluid reservoir needle. The sealing assembly also has a fluid chamber located at least partially in the reservoir port receptacle, and a needle sealing element having a self-sealing needle opening formed therein. The needle sealing element is located within the reservoir port receptacle between the distal end and the fluid chamber. The self-sealing needle opening accommodates the hollow fluid reservoir needle when the reservoir port engages the reservoir port receptacle.

主权项

1. A sealing assembly for a fluid infusion device that cooperates with a fluid reservoir having a reservoir port and a hollow fluid reservoir needle at least partially located within the reservoir port, the sealing assembly comprising:
a reservoir port receptacle to receive the reservoir port, and comprising a proximal end, a distal end extending from the proximal end, and a needle opening formed in the distal end to receive the hollow fluid reservoir needle, the reservoir port receptacle residing within the reservoir port when engaged therewith, and the hollow fluid reservoir needle residing within the reservoir port receptacle when the reservoir port engages the reservoir port receptacle; a first fluid chamber located within the reservoir port receptacle; a second fluid chamber separated from the reservoir port receptacle; a cap component coupled to the reservoir port receptacle, the cap component having an outlet conduit formed therein, the outlet conduit having a first end in fluid communication with the first fluid chamber and having a second end in fluid communication with the second fluid chamber and with a delivery conduit of the fluid infusion device, and the cap component having a protruding section that terminates at an abutment surface, the protruding section extending into the reservoir port receptacle and having an interior area that defines the first fluid chamber; and a needle sealing element having a self-sealing needle opening formed therein, the needle sealing element located within the reservoir port receptacle between the distal end of the reservoir port receptacle and the abutment surface of the cap component, wherein the self-sealing needle opening accommodates the hollow fluid reservoir needle when the reservoir port engages the reservoir port receptacle, wherein: the hollow fluid reservoir needle terminates at a blunt tip; the needle sealing element comprises a tapered opening to receive the blunt tip; and engagement of the reservoir port with the reservoir port receptacle causes the blunt tip to penetrate the self-sealing needle opening to establish fluid communication from the hollow fluid reservoir needle to the first fluid chamber.