Fluid delivery device having an insertable prefilled cartridge

1. A fluid delivery device comprising:

a housing having a bottom surface configured to be coupled to a skin surface;

a cartridge prefilled with a fluid and configured to be inserted into the housing, the cartridge having a septum configured to be generally perpendicular to the bottom surface when the cartridge is inserted in the housing; and

a needle assembly having a needle including a fluid coupling end and a delivery end, the fluid coupling end of the needle being fluidly disengaged from the cartridge in an initial position, the delivery end of the needle extending past a plane co-planar with the bottom surface in a deployed position and the fluid coupling end of the needle extending through the septum in the deployed position,

wherein the needle has a central portion extending between the fluid coupling end and the delivery end, the central portion bending around an axis that is parallel with the delivery end of the needle, wherein the central portion is helically shaped in the initial position.

2. The fluid delivery device of claim 1 , wherein the helical shape of the central portion is at least partially flattened toward the bottom surface when moving the needle assembly between the initial position and the deployed positions.

3. The fluid delivery device of claim 1 , wherein the central portion of the needle loops around a moveable needle core.

4. The fluid delivery device of claim 3 , wherein the needle core is coupled to a lock member configured to releasably retain the needle in the initial position and the deployed position.

5. The fluid delivery device of claim 1 , wherein the housing includes a hydraulic fluid drive, which includes hydraulic fluid.

6. The fluid delivery device of claim 5 , wherein the hydraulic fluid drive includes a port configured to couple with the cartridge, the port having a seal that is closed prior to inserting the cartridge into the housing and released when the cartridge is coupled with the port, the cartridge including a piston moveable by the hydraulic fluid in the deployed position.

7. The fluid delivery device of claim 6 , wherein the seal includes a rotatable valve having one or more fluid passages configured to fluidly couple the hydraulic fluid drive and the piston.

8. The fluid delivery device of claim 6 , wherein the seal includes a slideable valve having one or more fluid passages configured to fluidly couple the hydraulic fluid drive and the piston.

9. The fluid delivery device of claim 6 , wherein the hydraulic fluid drive is fluidly coupled to an accumulator configured to allow thermal expansion and contraction of the hydraulic fluid.

10. The fluid delivery device of claim 9 , wherein the accumulator is fluidly coupled to the hydraulic fluid drive when the seal is closed and fluidly disengaged from the hydraulic fluid drive when the seal is released.

11. The fluid delivery device of claim 5 , wherein the hydraulic fluid drive includes a first hydraulic chamber and a second hydraulic chamber, the first hydraulic chamber being fluidly coupled to the second hydraulic chamber by a flow restrictor.

12. The fluid delivery device of claim 1 , wherein the needle assembly includes a button, wherein actuation of the button moves the needle from the initial position to the deployed position.

13. A cartridge assembly for use with a fluid delivery device having a housing, the cartridge assembly comprising:

a cartridge having a septum configured to be generally perpendicular to a bottom surface of the housing when the cartridge is inserted in the housing; and

a needle assembly coupled to the cartridge proximate the septum prior to the cartridge assembly being inserted into the housing, wherein the needle assembly is coupled to the cartridge and is configured to be inserted into the housing when the cartridge is inserted into the housing, the needle assembly having a needle including a fluid coupling end and a delivery end, the fluid coupling end of the needle being generally perpendicular to the delivery end of the needle, the fluid coupling end of the needle being fluidly disengaged from the cartridge in an initial position, the delivery end of the needle configured to extend past a plane co-planar with the bottom surface in a deployed position and the fluid coupling end of the needle configured to extend through the septum in the deployed position,

wherein the needle has a central portion extending between the fluid coupling end and the delivery end, the central portion bending around an axis that is parallel with the delivery end of the needle, wherein the central portion is helically shaped in the initial position.

14. The cartridge assembly of claim 13 , wherein the helical shape of the central portion is at least partially flattened toward the bottom surface when moving the needle assembly between the initial position and the deployed position.

15. The cartridge assembly fluid delivery device of claim 13 , wherein the central portion of the needle loops around a moveable needle core.

16. A cartridge assembly for use with a fluid delivery device having a housing, the cartridge assembly comprising:

a cartridge having a septum configured to be generally perpendicular to a bottom surface of the housing when the cartridge is inserted in the housing; and

a needle assembly coupled to the cartridge proximate the septum prior to the cartridge assembly being inserted into the housing, wherein the needle assembly is coupled to the cartridge and is configured to be inserted into the housing when the cartridge is inserted into the housing, the needle assembly having a needle including a fluid coupling end and a delivery end, the fluid coupling end of the needle being generally perpendicular to the delivery end of the needle, the fluid coupling end of the needle being fluidly disengaged from the cartridge in an initial position, the delivery end of the needle configured to extend past a plane co-planar with the bottom surface in a deployed position and the fluid coupling end of the needle configured to extend through the septum in the deployed position,

wherein the needle assembly is coupled to a lock member and an assembly body, the lock member configured to releasably retain the needle within the assembly body in the initial position and a final position.

17. A fluid delivery device comprising:

a housing having a bottom surface configured to be coupled to a skin surface;

a cartridge prefilled with a fluid and configured to be inserted into the housing, the cartridge having a septum configured to be generally perpendicular to the bottom surface when the cartridge is inserted in the housing; and

a needle assembly having a needle including a fluid coupling end and a delivery end, the fluid coupling end of the needle being fluidly disengaged from the cartridge in an initial position, the delivery end of the needle extending past a plane co-planar with the bottom surface in a deployed position and the fluid coupling end of the needle extending through the septum in the deployed position, wherein the needle has a central portion, the central portion bending around an axis that is parallel with the delivery end of the needle, wherein the central portion of the needle loops around a movable needle core, and

wherein the needle core is coupled to a lock member configured to releasably retain the needle in the initial position and the deployed position.