Fluid-connection mechanism for patch-pumps

1. A selectively activatable patch-pump assembly comprising: a sealed prefilled drug-reservoir containing a drug to be delivered; a fluid-passageway in connection therewith, wherein the fluid-passageway is free of the drug; a selectively activatable penetrator which penetrates said sealed prefilled drug-reservoir and facilitates drug access to said fluid-passageway; and a selectively activatable, associated, cannula-containing assembly for delivering a drug subcutaneously to a subject, in fluid connection with said fluid-passageway; a first spring-based mechanism, wherein a selective activation-step initiates penetration of said sealed prefilled drug-reservoir; a structure preventing the inadvertent activation of said selectively activatable patch-pump assembly, the structure configured such that: removing or releasing the structure from said selectively activatable patch-pump assembly is the selective activation-step, and removing or releasing the structure from said selectively activatable patch-pump assembly automatically causes the first spring-based mechanism to propel said selectively activatable penetrator through said fluid-passageway to penetrate said sealed prefilled drug-reservoir, establishing fluid communication between said sealed prefilled drug-reservoir and said fluid-passageway; wherein said sealed prefilled drug-reservoir is stationary relative to a central longitudinal axis defined by the cannula-containing assembly during initiation of penetration and during penetration of the sealed prefilled drug-reservoir by the selectively activatable penetrator.

2. The selectively activatable patch-pump assembly of claim 1 wherein said selectively activatable penetrator comprises a hypodermic needle.

3. The selectively activatable patch-pump assembly of claim 1 , further comprising a second spring-based mechanism, which is configured to propel said cannula-containing assembly toward proximally located skin following drug access to said fluid-passageway.

4. The selectively activatable patch-pump assembly of claim 3 , wherein said cannula-containing assembly comprises an access port, wherein the access port is alignable with said fluid passageway in a selective manner.

5. The selectively activatable patch-pump assembly of claim 1 further comprising an actuator which compresses said sealed prefilled drug-reservoir following penetration of said sealed prefilled drug-reservoir.

6. The selectively activatable patch-pump assembly of claim 1 , wherein said selectively activatable patch-pump assembly is a single unit.

7. The selectively activatable patch-pump assembly of claim 1 , wherein said selectively activatable patch-pump assembly is comprised of operationally connectable units comprising a drug reservoir-containing unit wherein the drug reservoir-containing unit comprises said sealed prefilled drug-reservoir, and the cannula-containing assembly.

8. The selectively activatable patch-pump assembly of claim 1 , further comprising:

a second spring-based mechanism configured to propel said cannula-containing assembly to enable drug access from said fluid-passageway to said cannula-containing assembly.

9. The selectively activatable patch-pump assembly of claim 1 , wherein the first spring-based mechanism is configured to propel said selectively activatable penetrator by releasing a spring.

10. A patch-pump assembly, the patch-pump assembly comprising: a prefilled drug-reservoir containing a drug to be delivered, the prefilled drug-reservoir comprising a seal; a fluid-passageway contacting the seal of the prefilled drug-reservoir, wherein the fluid-passageway is free of the drug; a penetrator configured to establish fluid communication between the prefilled drug-reservoir and the fluid-passageway; a pin configured to prevent the penetrator from penetrating the prefilled drug-reservoir; a cannula-containing assembly configured to deliver the drug subcutaneously to a subject; and a spring-based mechanism configured to enable fluid communication between the fluid-passageway and the cannula-containing assembly, wherein a portion of the pin is internal to the patch-pump assembly, and the pin is configured for removal or release from the patch-pump assembly, thereby automatically causing emergence of the penetrator into the fluid-passageway to penetrate said seal to provide fluid communication between the prefilled drug reservoir and the fluid-passageway.

11. The patch pump-assembly of claim 10 , wherein the spring-based mechanism propels the cannula-containing assembly to enable fluid communication between the fluid-passageway and the cannula-containing assembly.

12. The patch pump-assembly of claim 10 , wherein the spring-based mechanism is configured to propel the cannula-containing assembly toward proximally located skin.

13. The patch pump-assembly of claim 10 , wherein the pin is configured such that removing or releasing the pin from said patch-pump assembly initiates the spring-based mechanism to propel the penetrator to establish fluid communication between the prefilled drug-reservoir and the fluid-passageway.

14. The patch pump-assembly of claim 10 , wherein the cannula-containing assembly comprises an access port, wherein the access port is alignable with the fluid-passageway in a selective manner.

15. The patch pump-assembly of claim 10 , further comprising an actuator which compresses the prefilled drug-reservoir following penetration of the prefilled drug-reservoir.

16. The patch pump-assembly of claim 13 , wherein the pin is configured to prevent the penetrator from penetrating the prefilled drug-reservoir by restraining the spring-based mechanism in a compressed state.