Lockout element for dispense interface

1. A dispense interface for use with a drug delivery device, the dispense interface comprising:

a distal end; and,

a proximal end configured to be seated about a distal end of the said drug delivery device;

an outer body and an inner body contained within the outer body, where the outer body has a mounting hub provided at the distal end of the dispense interface and the inner body is coupled to an inner surface of the outer body,

a lockout element being arranged within the outer body of the dispense interface, wherein the lockout element comprises a first wing portion and a second wing portion,

wherein the lockout element is maintained in a first position,

wherein the lockout element in the first position is configured to move into a second position when the dispense interface is first attached and then removed from said drug delivery device, wherein the first wing portion and the second wing portion are closer to each other in the second position than in the first position so as to prevent said dispense interface from being reattached to the drug delivery device in the second position,

wherein the lockout element is arranged in the first position such that it is engaged by the drug delivery device on attachment of the dispense interface to the drug delivery device and moved into a third position,

wherein the lockout element is configured to move from the third position to the second position on removal of the drug delivery device from the dispense interface.

2. The apparatus according to claim 1 , wherein the lockout element comprises a spring assembly.

3. The apparatus according to claim 2 , wherein the spring assembly comprises two or more sprung forms.

4. The apparatus according to claim 2 , wherein the spring assembly comprises at least one of the first and second wing portions comprising a rigid component.

5. The apparatus according to claim 1 ,

wherein the lockout element comprises at least one knuckle portion configured to be contacted by the drug delivery device on attachment of the dispense interface to the drug delivery device,

wherein the lockout element comprises a pivot point for each of the first and second wing portions, and,

wherein each of the first and second wing portions is configured to bend inward around the respective pivot point when the lockout element moves to the second position.

6. The apparatus according to claim 1 , wherein the dispense interface comprises a retention arrangement configured to maintain the lockout element in the first position until the lockout element is engaged by the drug delivery device on attachment of the dispense interface to the drug delivery device.

7. The apparatus according to claim 6 ,

wherein the retention arrangement comprises at least one stepped feature on the inner body of the dispense interface and

wherein the lockout element in the first position is configured to be pushed off the at least one stepped feature upon engagement by the drug delivery device on attachment of the dispense interface to the drug delivery device.

8. The apparatus according to claim 1 ,

wherein the dispense interface comprises a retention arrangement, configured to maintain the lockout element in the second position and

wherein the lockout element is arranged in the first position such that it is engaged by the drug delivery device on attachment of the dispense interface to the drug delivery device and moved into the second position.

9. The apparatus according to claim 8 ,

wherein the retention arrangement comprises at least one non-return clip configured to maintain the lockout element in the second position and

wherein a clip portion of the lockout element is configured to ride over the at least one non-return clip when it is moved into the third position.

10. The apparatus according to claim 8 ,

wherein the retention arrangement comprises at least one retention region which is ramped and then steps back to a flat region in a distal direction of the dispense interface,

which at least one retention region is arranged on the inner body of the dispense interface and

which at least one retention region is configured to engage the lockout element symmetrically on at least two surfaces of contact in the second position.

11. The apparatus according to claim 8 , further comprising a tab at each end of the lockout element facing in a distal direction, wherein each respective tab is arranged between the corresponding first or second wing portion and wherein the lockout element comprises a platform region configured to be engaged by the drug delivery device on attachment of the dispense interface to the drug delivery device.

12. The apparatus according to claim 8 ,

wherein the lockout element comprises two symmetrical spring forms,

wherein each spring form comprises a hooked end,

wherein the retention arrangement comprises at least one boss feature on the inner body of the dispense interface and further comprises at least one rib on the outer body of the dispense interface,

wherein one of the at least one boss feature and one of the at least one rib are arranged to provide a gap in between and

wherein each hooked end is configured to move through the gap between a boss feature and a corresponding rib when the lockout element is engaged by the drug delivery device on attachment of the dispense interface to the drug delivery device.

13. A dispense interface for use with a drug delivery device, the dispense interface comprising:

a distal end; and,

a proximal end configured to be seated about a distal end of the said drug delivery device;

an outer body and an inner body contained within the outer body, where the outer body has a mounting hub provided at the distal end of the dispense interface, the mounting hub configured to be releasably connected to a needle assembly and the inner body is coupled to an inner surface of the outer body,

a lockout element being arranged within the outer body of the dispense interface, wherein the lockout element comprises a first wing portion and a second wing portion,

wherein the lockout element is maintained in a first position,

wherein the lockout element in the first position is configured to move into a second position when the dispense interface is first attached and then removed from said drug delivery device, wherein the first wing portion and the second wing portion are closer to each other in the second position than in the first position so as to prevent said dispense interface from being reattached to the drug delivery device in the second position,

wherein the lockout element is arranged in the first position such that it is engaged by the drug delivery device on attachment of the dispense interface to the drug delivery device and moved into a third position, and

wherein the lockout element is configured to move from the third position to the second position on removal of the drug delivery device from the dispense interface.