Spring driven injector apparatus with needle insertion

An injection device, comprising:

• a housing for at least one cartridge containing a medicament to be administered to a patient;
• at least one needle mounted within the housing and extending forwardly, in a direction which is non-parallel to a longitudinal axis of the at least one cartridge, from a rear end associated with the at least one cartridge to a tip, wherein the needle is moveable relative to the housing between a retracted position and a delivery position in which the tip of the needle is displaced by a distance in a direction transverse to the housing;
• and
• a delivery mechanism configured to move the needle between the retracted and delivery positions and to dispense medicament from the at least one cartridge, the delivery mechanism comprising:
• a plunger having a forward end extending into the cartridge for expressing a dose in use, and a rearward end including a profiled head;
• a biasing element arranged to urge the plunger toward a forward position;
• a latch fixed relative to the housing and arranged to receive the profiled head of the plunger and retain the plunger in a rearward position against an opposing force of the biasing element;
• and wherein the delivery mechanism is actuated in a transverse direction relative to the housing, moving the needle to the delivery position, and releasing the plunger from the latch such that the biasing element may urge the plunger forward in a longitudinal direction.

An injection device, comprising:

• a carrier pivotally mounted within a housing for at least one cartridge containing a medicament to be administered to a patient;
• a needle fixed relative to the carrier and extending forwardly to a tip in a direction which is non-parallel with a longitudinal axis of the at least one cartridge such that rotation of a cartridge body relative to the housing may provide a penetration movement of the needle;
• and
• a delivery mechanism comprising:
• a drive member longitudinally moveable relative to the housing;
• a stored energy element arranged to drive the drive member upon activation of the injection device;
• and wherein the drive member comprises a cam surface configured to engage a surface of the carrier and rotate the carrier about a pivot and at least one plunger arranged to engage a cylinder in the cartridge.

An injection device, comprising:

• at least one cartridge containing a medicament to be administered to a patient;
• a drive member moveable in a longitudinal direction relative to the at least one cartridge to deliver a dose of medicament therefrom;
• and
• a stored energy element arranged to move the drive member during delivery, wherein the drive member is releasably coupled to the stored energy element and may be uncoupled by movement in a direction transverse to an actuation direction.

An injection device, comprising:

• a cartridge containing a medicament to be administered to a patient and a delivery mechanism for dispensing medicament from the cartridge, wherein the delivery mechanism comprises:
• a plunger having a forward end extending into the cartridge for expressing a dose in use, and a rearward end including a profiled head;
• a biasing means arranged to urge the plunger toward a forward position;
• and
• a guide plate fixed relative to a housing and having a guide slot for receiving the profiled head of the plunger and latching the plunger in a rearward position against the bias of the biasing means,
• wherein movement of a carrier from an initial position to a delivery position translates the plunger head along the guide slot to an opening aligned with the delivery position such that the profiled head is released from the slot and may be driven forwardly by the biasing means.

An injection device, comprising:

• at least one cartridge containing a medicament to be administered to a patient and having a longitudinal axis;
• at least one needle in communication with the at least one cartridge, the at least one needle having a tip that is radially offset from the longitudinal axis of the cartridge and extends forwardly in a radial plane in a direction perpendicular to the radial direction of the offset;
• and
• a delivery mechanism arranged to rotate the at least one cartridge about its longitudinal axis, wherein the needle is coupled to the at least one cartridge such that rotation of the at least one cartridge rotates the needle between a retracted position and a delivery position.

An injection device, comprising:

• a housing for a plurality of cartridges each containing a medicament to be administered to a patient;
• a plurality of needles in communication with the plurality of cartridges;
• and
• a delivery mechanism arranged to deliver medicament through the plurality of cartridges via the plurality of needles.