Disposable infusion device with dual valve system
A wearable infusion device comprises a first control movable between a first position and a second position that when in the first position, establishes a first fluid path between a reservoir and a pump and when in the second position, establishes a second fluid path between the pump and an outlet. A second control actuates the pump only when the second fluid path has been established by the first control.
1. A skin-adherable infusion device comprising:
a reservoir that holds a liquid medicament;
an outlet port that delivers the liquid medicament to a patient;
a pump that holds a volume of the liquid medicament received from the reservoir and displaces substantially all of the volume of the liquid medicament when actuated;
a first control movable between a first position and a second position, the first control, when in the first position, establishing a first fluid path between the reservoir and the pump, and when in the second position, establishing a second fluid path between the pump and the outlet wherein the control is undepressed in the first position and depressed in the second position; and
a second control that mechanically actuates the pump only when the second fluid path has been established by the first control,
the device further comprising a first valve and a second valve operable by the first control for establishing the first and second fluid paths.
2. The device of claim 1 , wherein the valves are arranged to preclude the valves from being concurrently opened.
3. The device of claim 2 , further comprising a linkage between the valves that precludes the valves from being concurrently opened.
4. The device of claim 3 , wherein the linkage is a toggle linkage.
5. The device of claim 4 , wherein the toggle linkage is directly coupled to the first control.
6. The device of claim 1 , wherein the first and second valves comprise a shuttle valve.
7. The device of claim 6 , wherein the shuttle valve is directly coupled to the first control.
8. The device of claim 1 , wherein the first and second valves are operable independently from the pump.
9. The device of claim 1 , wherein the valves and the pump are operable solely by manual force applied to the first and second control.
10. The device of claim 1 , wherein one of the first and second valves is a safety valve that provides a tighter closed seal with increased pressure from the reservoir.
11. The device of claim 10 , wherein the one of the first and second valves is between the reservoir and the outlet.
12. The device of claim 1 , wherein the pump is a piston pump comprising a piston and a cylinder and wherein the piston is directly coupled to the second control.
13. The device of claim 1 , wherein one of the first and second valves provides a tighter closed seal with increased pressure from the pump.
14. A skin adherable infusion device comprising:
a reservoir that holds a liquid medicament;
an outlet port that delivers the liquid medicament to a patient;
a pump that holds a volume of the liquid medicament received from the reservoir and displaces substantially all of the volume of the liquid medicament when actuated;
a first valve between the reservoir and the pump;
a second valve between the outlet and the pump;
a first actuator that, when activated, closes the first valve and opens the second valve;
a second actuator that, when activated, mechanically actuates the pump; and
a linkage that precludes the second actuator from being activated until the first actuator is activated.
15. The device of claim 14 , wherein the valves are arranged to preclude the valves from being concurrently opened.
16. The device of claim 15 , further comprising a second linkage between the valves that precludes the valves from being concurrently opened.
17. The device of claim 16 , wherein the second linkage is a toggle linkage.
18. The device of claim 14 , wherein the first and second valves comprise a shuttle valve.
19. The device of claim 18 , wherein the shuttle valve is directly coupled to the first actuator.
20. The device of claim 14 , wherein the first and second valves are operable independently from the pump.
21. The device of claim 14 , wherein the valves and the pump are operable solely by manual force applied to the first and second actuator.
22. The device of claim 14 , wherein the second valve is a safety valve that provides a tighter closed seal with increased pressure from the reservoir.
23. The device of claim 14 , wherein the pump is a piston pump comprising a piston and a cylinder and wherein the piston is directly coupled to the second actuator.
24. The device of claim 14 , wherein the first valve provides a tighter closed seal with increased pressure from the pump.