A drug delivery device for selecting and dispensing a number of user variable doses of a medicament. The device comprises a housing, a dose setting element rotatable relative to the housing during dose setting and dose dispensing, a drive member coupled to the dose setting member via a clutch, and a piston rod coupled to the housing and to the drive member Further, the device further comprises a cartridge holder removably attached to the housing and a reset element, which is permanently rotationally constrained to the housing and rotationally constrained to the drive member during dose setting, and at least one spring acting on the reset element, such that, if the cartridge holder is detached from the housing, the reset element is axially moved relative to the housing into a position in which the drive member is allowed to rotate relative to the housing

A drug delivery device for selecting and dispensing a number of user variable doses of a medicament. The device comprises a housing, a dose setting element rotatable relative to the housing during dose setting and dose dispensing, a drive member coupled to the dose setting member via a clutch, and a piston rod coupled to the housing and to the drive member. Further, the device further comprises a cartridge holder removably attached to the housing and a reset element, which is axially constrained to the dose setting element, and at least one spring acting on the reset element, such that, if the cartridge holder is detached from the housing, the reset element is axially moved relative to the housing onto a position in which the dose setting element is rotationally constrained to the housing and the drive member is allowed to rotate relative to the housing.

The present disclosure is generally directed to a drug delivery device for selecting and dispensing a number of user variable doses of a medicament. The device comprises a housing, a dose selector operable to set a dose by rotation relative to the housing, a number sleeve arranged within the housing, a drive sleeve which is rotationally constrained to the housing during dose setting and dose correcting and which is rotatable relative to the housing during dose dispensing, a piston rod coupled to the housing and to the drive sleeve a drive spring arranged between the housing and the number sleeve, and a ratchet operatively arranged between the drive sleeve and the number sleeve. According to the disclosure the ratchet comprises at least one clicker arm of one of the number sleeve and the drive sleeve and ratchet teeth of the other of the number sleeve and the drive sleeve.

A method for assembling a drive spring, especially into a drug delivery device includes rotating a component part to which the drive spring is attached in a first direction, followed by a rotation of the component part in the opposite direction and followed by attachment of a rotational stop. Further, the disclosure includes a drug delivery device for selecting and dispensing a number of user variable doses of a medicament, which device comprises a pre-charged drive spring.

A device (1) for dispensing a substance to a patient comprising a cylindrical first container (2) containing the substance and a second container (3) containing a liquid. The device further comprises an injection device (4) and transfer mechanism (5) for transferring the liquid from the second container (3) to the first container (2) and from the first container (2) to the injection device (4). The first container (2) has a connection element (7) and a plunger (9) that can be moved between the first (6) and second ends (8). By moving the plunger (9) towards the first end (6), liquid contained therein can be dispensed via the injection device (4). The injection device (4) comprises a piercing cannula (15) and an indwelling cannula (16). In an initial position, a distal end region of the piercing cannula (15) extends coaxially in the interior of the indwelling cannula (16).

An infusion device includes a housing with an interior chamber sized and configured to hold at least a flange and plunger of a syringe, a trigger held by the housing, and a lever in communication with the trigger and including an upwardly extending cam with a cam path having an upper end. The cam is in communication with the flange of the syringe. In response to actuation of the trigger to dispense fluid from the syringe, the upper end of the cam travels upward above the syringe and longitudinally toward a dispensing end of the syringe to linearly translate the plunger of the syringe in a first direction to dispense fluid from the syringe. To refill fluid into the syringe, the upper end of the cam travels downward and longitudinally away from the dispensing end of the syringe to linearly translate the plunger in a second direction to intake fluid.

A medicament delivery device is presented having a housing configured to accommodate a medicament container, a power pack arranged to exert a force on the medicament container to expel medicament, where the power pack has a plunger rod, a drive spring, an actuator configured to releasably hold the plunger rod with the drive spring in an energized state, an actuator sleeve configured to interact with the holding elements, where the actuator sleeve moves in a longitudinal direction in relation to the actuator. The delivery device also has a medicament delivery member guard movable in the longitudinal direction and connected to the actuator sleeve, an activator arranged at a distal end of the housing and operably connected to the actuator to release the plunger rod. A locking arrangement that releasably locks the actuator to the actuator sleeve is also present.

A mechanism for preventing setting of a dose, which exceeds the amount of a medicament in a reservoir in an injection device. The device can contain a threaded piston rod, a limiter and a driver. The three elements can be arranged such that during dose setting, the limiter is moved towards an end-of-content position, wherein dose setting is limited. The invention contains an accumulative and a non-accumulative embodiment. The invention further relates to a mechanism for preventing ejection of a dose exceeding the set dose.

A medical injection device, including: a medication container having a mov-able piston; a push rod assembly displaceably disposed in the medical injection device, the push rod assembly having a plurality of spaced-apart position setting means disposed along the length thereof, the push rod assembly selectively displacing the movable piston to dispense medicament from the medication container; a spring to bias the push rod assembly to move toward the distal end of the medical injection device; a releasable restraining means configured to releasably restrain the push rod assembly in a locked state against the biasing of the spring, wherein, upon release of the releasable restraining means, the push rod assembly moves under force of the spring toward the distal end of the medical injection device; and an arming means configured to move the push rod assembly toward the proximal end of the medical injection device.

An injection device includes an injection complete indicator which includes its own bias and which is latched into a retracted position as the injection device is cocked. Upon firing the injection device, the injection complete indicator is kept in its retracted position until towards the end of the forward stroke of the drive mechanism, whereupon the injection complete indicator is unlatched and shoots forwardly under the influence of the bias to impact an abutment to generate an audible/tactile indication along with a visual indication.