Granted Patent B2

US 12,324,899 · App. 18/784,148 · Granted Jun 10, 2025

Inventor: Richard J. Lanigan (Concord, NH)

Assignee: DEKA Products Limited Partnership

A61M5/158A61M5/14248A61M2005/1585A61M2005/1586

Abstract

Claims (18)

1. A cannula sub assembly for an infusion set comprising:

a continuous monolithic body including a cannula and a septum housing having a septum receptacle with a raised region at a bottom thereof, a lumen of the cannula being continuous with a sharp guide included in raised region;

a septum including a septum recess having a centering wall section formed corresponding to the raised region; and

a septum retainer including a body having latch arms extending through the septum housing and each including a latching surface which in an engaged state catches a cooperating feature of the septum housing to capture the septum within the septum housing.

2. The cannula sub assembly of claim 1 , wherein the septum housing includes a salient arranged to engage a latch of an infusion set base to retain the cannula sub assembly within the infusion set base.

3. The cannula sub assembly of claim 1 , wherein a top face of a wall of the septum receptacle has slots recessed therein.

4. The cannula sub assembly of claim 3 , wherein the slots include two slots which are disposed opposite one another.

5. The cannula sub assembly of claim 1 , wherein the septum retainer further comprises a set of projections.

6. The cannula sub assembly of claim 5 , wherein the set of projections are sized to be received within slots recessed into a top face of a wall defining the septum receptacle.

7. The cannula sub assembly of claim 6 , wherein the set of projections obstructs only a top portion of the slot when received therein so as to leave a bottom segment of the slot open and exposing a side wall of the septum at a location even with at least a portion of the septum recess.

8. The cannula sub assembly of claim 1 , wherein the raised section of the septum receptacle has a frusto-conic outer wall.

9. The cannula sub assembly of claim 1 , wherein the septum housing includes a notch in a side wall thereof configured to engage a latch of an infusion set base to retain the cannula sub assembly within the infusion set base.

10. The cannula sub assembly of claim 1 , wherein monolithic body is formed via straight pull molding.

11. The cannula sub assembly of claim 1 , wherein the monolithic body is devoid of undercut features.

12. The cannula sub assembly of claim 1 , wherein the monolithic body is polypropylene.

13. The cannula sub assembly of claim 1 , wherein the monolithic body is PTFE.

14. The cannula sub assembly of claim 1 , wherein the body of the septum retainer includes a channel extending therethrough and sized to receive a nub on a face of the septum.

15. The cannula sub assembly of claim 1 , wherein the sharp guide is encompassed by a substantially flat peripheral edge at an uppermost part of the raised section.

Assignments (1)

Continuity (4)

References Cited (238)