Portable infusion pump
A medicament delivery device includes a housing with a compartment for a medicament container, an injection needle arranged to housing and connectable to the medicament container for delivering a dose of medicament, a manually operated activation mechanism, an actuation mechanism operably connected to the activation mechanism and configured to extend the injection needle, upon activation of the activation mechanism, from a first position inside the housing to a second position for penetrating a patient, a plunger rod in the housing configured to act on the medicament container for delivering a dose of medicament through the injection needle, a driver configured to acting on the plunger rod for delivering the dose, and a needle cover operably arranged in the housing between a position inside the housing and an extended position outside the housing for shielding the injection needle when the injection needle is in the second position.
1. A medicament delivery device, comprising:
a housing;
a compartment in the housing for positioning a medicament container;
an injection needle arranged to the housing and connectable to the medicament container for supplying a dose of medicament;
a manually operated an activation mechanism for activating the device;
an actuation mechanism operably connected to the activation mechanism and configured to move and extend the injection needle from a first position inside the housing to a second position for penetration of a patient upon activation of the activation mechanism;
a plunger rod positioned within the housing to act on the medicament container during delivery of the dose of medicament through the injection needle, where movement of plunger rod is in a direction transverse to a movement of the injection needle from the first position to the second position;
a driver configured to act on the plunger rod for delivering the dose of medicament; and
a needle cover moveable relative to the injection needle and operably arranged in the housing between a position inside the housing and an extended position outside the housing for shielding the injection needle when the medicament container has been emptied.
2. The medicament delivery device of claim 1 , wherein the actuation mechanism further comprises a linkage configured to lock the injection needle in the second position.
3. The medicament delivery device of claim 2 , wherein the housing has an inner surface comprising a ledge that engages the needle cover to lock the needle cover in the extended position.
4. The medicament delivery device of claim 3 , wherein the activation mechanism comprises two operating elements disposed on opposite sides of the medicament delivery device.
5. The medicament delivery device of claim 4 , wherein the two operating elements comprise activation buttons that are manually depressed for activating the device.
6. The medicament delivery device of claim 5 , wherein the activation buttons are connected to the injection needle via a linkage included in the actuation mechanism, thereby enabling movement of the injection needle to the extended position when the activation buttons are depressed.
7. The medicament delivery device of claim 6 , wherein the linkage comprises a holding element.
8. The medicament delivery device of claim 1 , further comprising an injection speed control mechanism operatively connected to the driver.
9. The medicament delivery device of claim 8 , wherein the injection speed control mechanism comprises a balance wheel that interacts with a pallet fork that acts on an escapement wheel, and a transmission between the driver and the escapement wheel.
10. The medicament delivery device of claim 9 , further comprising a balance spring drivably connected to the escapement wheel.
11. The medicament delivery device of claim 8 , further comprising an auto-stop mechanism configured to stop the driver or the injection speed control mechanism at conclusion of a dose delivery sequence.
12. The medicament delivery device of claim 8 , further comprising a manually operable stop mechanism configured to stop the driver or the injection speed control mechanism upon activation.
13. The medicament delivery device of claim 8 , further comprising a manually operated pausing mechanism configured to stop and start the driver or the injection speed control mechanism upon activation.
14. The medicament delivery device of claim 12 , further comprising a medicament container penetration mechanism operably connected to the activation mechanism and configured to cause, upon activation, a communication between medicament inside the medicament container and the injection needle.
15. The medicament delivery device of claim 1 , wherein the plunger rod comprises a number of segments that are inter-connectable to each other.