The present disclosure relates to an injection device, in particular a micro dose injection device such as, for example, an ophthalmic injection device. An example device comprises a rotatable plunger; a solution receptacle having a first end configured to slidably receive the rotatable plunger and a second end configured to dispense solution contained in the solution receptacle; a first stop member configured to prevent the rotatable plunger from being slidably displaced to a second position while the rotatable plunger is at a first position and in a first orientation; and a second stop member configured to prevent the rotatable plunger from rotating in a first direction about the first axis while the rotatable plunger is at the first position and in the first orientation, wherein slidably displacing the rotatable plunger from the first position to the second position dispenses a quantity of the solution contained in the solution receptacle.

A drive mechanism for a medication delivery device containing a resilient member and having a rotation member configured to be rotated in a first direction during setting of a dose of a medication and to be rotated in a second direction during delivery of the dose, where the rotation member is coupled to a drive member that is coupled to a piston rod such that on dose delivery the piston rod is displaced in a distal direction to dispense a medicament and where the resilient member prevents movement of the drive member and the piston rod during dose setting.

Disclosed is a syringe for a micro-dosing syringe pump. The syringe includes a reservoir having an outlet port; a plunger having a track, with the plunger received inside a portion of the reservoir; a plunger driver comprising a gear connected to one end of a shaft and a pin located adjacent an opposite end of the shaft, with the plunger driver received inside the plunger and with the pin located inside and engaging the track. In use, rotation of the gear in a first direction advances the plunger into the reservoir a first distance as the pin travels in the track and rotation of the gear in a second direction opposite the first direction advances the plunger a further distance into the reservoir as the pin travels in the track. The design prevents excess dosing in a runaway motor failure.

A drive mechanism suitable for use in drug delivery devices is disclosed. The drive mechanism may be used with injector-type drug delivery devices, such as those permitting a user to set the delivery dose. The drive mechanism may include a housing, a dose dial sleeve, and a drive sleeve. A clutch is configured to permit rotation of the drive sleeve and the dose dial sleeve with respect to the housing when the dose dial sleeve and drive sleeve are coupled through the clutch. Conversely, when the dose dial sleeve and drive sleeve are in a de-coupled state, rotation of the dose dial sleeve with respect to the housing is permitted and rotation of the drive sleeve with respect to the housing is prevented. In the de-coupled state, axial movement of the drive sleeve transfers force in a longitudinal direction for actuation of a drug delivery device.

An injection device includes a housing; a receptacle for injection fluid; a dosing piston to press out the injection fluid; a feed part connected to the dosing piston via a first threaded connection; a slide having a thread of a second threaded connection; and, a setting part having a thread of a third threaded connection and configured to set an amount of injection fluid to be dispensed. The setting part moves in the distal direction by virtue of the third threaded connection when the amount of injection fluid to be dispensed is being set. The setting part can move in the proximal direction when the injection fluid is pressed out. A latching unit defines a latching position of the setting part and acts between the setting part and housing. Each latching position has an unequivocal rotational position of the setting part in relation to the housing assigned thereto.

An injection device for injecting medicament in a patient comprises a housing configured to house a fluid reservoir that has one of a plurality of volumes of medicament. An injection conduit fluidly coupled to the fluid reservoir defines a fluid pathway from the fluid reservoir to the patient. A firing mechanism is coupled to the fluid reservoir and is configured to expel the medicament from the fluid reservoir through the injection conduit. A volume setting mechanism is coupled to the firing mechanism and is configured to select the one of the plurality of volumes of medicament for the firing mechanism to expel. A dose setting mechanism is configured to select all or a fraction of the one of the plurality of volumes of medicament that is injected from the injection conduit when the firing mechanism is actuated.

Injection device comprising a tubular elongated main body, a needle shield slidably arranged in said main body, a needle shield link slidably connected to said needle shield, a cartridge containing medicament arranged in said main body, a needle connected to said cartridge, a plunger operatively arranged to said cartridge for ejecting said medicament through said needle and arranged on its upper part with a number of outwardly extending stop members, spring means arranged to said plunger for operating said plunger, a dose activating means, a needle shield spring surrounding the needle shield link. The injection device is capable of setting and delivering a certain preset dose.

An assembly for a drug delivery device is proposed, the assembly comprising: a housing; a clutch member; and a drive member, wherein one of the clutch member and the drive member is provided with at least one deflectable feature and the other one of the clutch member and the drive member is provided with at least one interaction feature, the clutch member and the drive member are movable relative to one another between a first relative position and a second relative position, in the first relative position, the clutch member and/or the drive member is rotatable relative to the housing, in the second relative position, the deflectable feature is arranged to prevent rotation of the clutch member and/or of the drive member relative to the housing, and wherein the deflectable feature and the interaction feature are arranged such that, when the clutch member and the drive member are moved relative to one another from the first relative position into the second relative position, the deflectable feature and the interaction feature mechanically interact in order to deflect the deflectable feature.

A method of using a fluid dispenser unit having a reservoir and a piston that slides in the reservoir. The unit includes an extractor head secured to the reservoir to suck fluid to be dispensed into the reservoir, and a spray head assembled on the extractor head to spray the fluid out from the reservoir. The method includes the steps of sucking a fluid to be dispensed into the reservoir through the extractor head; assembling the spray head on the extractor head; and spraying the fluid through the spray head. The step of sucking up a fluid to be dispensed includes a first step of extracting a fluid, such as a solvent, from an extraction reservoir, and a second step of mixing the fluid with a first substance, such as a powder or a lyophilisate, so as to form the fluid to be dispensed.

An electronic system for a drug delivery device is provided. The system includes an electronic control unit configured to control an operation of the system, and an electrical motion sensing unit that is configured to generate one or more data signals. The data signals are suitable to quantify relative rotational movement between a first member and a second member during a dose setting operation for setting a dose to be delivered by the drug delivery device and/or a dose delivery operation for delivering the set dose. The system is configured to perform a comparison operation to compare first data to second data. The first data indicating a first relative angular position of the first member and the second member, and being derivable from one or more data signals. The second data indicating a second relative angular position of the first member and the second member.