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.

An assembly includes a cartridge containing doses of a drug and a piston rod adapted and arranged to expel drug from the cartridge, the piston rod including a thread. The assembly further includes a nut member adapted and arranged to be rotated with respect to the piston rod about a rotational axis. The assembly further comprises a last dose stop mechanism adapted including at least one first interaction member and at least one second interaction member provided by the piston rod and at least one first stop member and at least one second stop member provided by the nut member. The interaction members and the stop members are configured to mechanically cooperate with one another such that further relative movement of the nut member and the piston rod for setting a dose of the drug is prevented.

The present disclosure is generally directed to a resettable drug delivery device for selecting and dispensing a number of user variable doses of a medicament. The drug delivery device comprises a housing, a cartridge holder releasably attached to the distal end of the housing, a piston rod engaging a housing insert and a drive member, a dose setting member guided within the housing to allow rotation of the dose setting member during dose setting and dose dispensing, a clutch for rotationally coupling the drive member and the dose setting member, and a locking element which is rotationally constrained to the housing and is axially movable relative to the housing between a proximal dose setting position and a distal resetting position.

Embodiments of the present disclosure describe drug delivery with a reusable pen injector. In particular, several embodiments are directed to motor-driven delivery of cartridge-based medicaments with an electronic pen injector device and associated pen cap device.

An assembly for a drug delivery device and an associated drug delivery device are provided. The device has a drug delivery device housing and a medicament contained in the drug delivery device housing. A clutch is established between the dose knob and the dial link to prevent inadvertent proximal axial movement of the lead screw away from the cartridge piston, which can lead to dosing inaccuracies.

A device for administering a fluid product includes a first housing part with a receiver for the product, a second housing part detachably connectable to the first housing part, a piston rod held such that it can be displaced for the exertion of an emptying movement, an actuatable or releasable drive element for the piston rod, a coupling element including a coupling input element that couples the drive element to the piston rod in a coupling engagement, transmits a driving force of the drive element to the piston rod, and triggers the emptying movement, and a decoupling element displaceably connected to the second housing part and coupled to the first housing part such that it is displaced, by a movement of the housing parts in relation to each other when the housing parts are separated into a decoupling position wherein the piston rod is decoupled from the coupling input element.

A cartridge holding unit includes a cartridge container forming an outer surface of the cartridge holding unit and having an inner space, and a cartridge holder forming a tube-shaped holding section arranged in the inner space of the cartridge container, the cartridge holder configured to firmly hold a cartridge in parallel with the cartridge holder and the cartridge holder and the cartridge container are firmly coupled to each other regarding their axial orientations.

A spring assisted drug delivery device is provided comprising a housing and a lead screw having a longitudinal axis, a distal end and a proximal end that is rotatably fixed during dose setting and dose delivery and axially movable in a distal direction relative to the housing. The device further comprises a drive nut threadedly engaged and screwable along the lead screw threaded shaft and a number sleeve threadedly engaged with the housing to be screwable relative to the housing. A dial link is connected with the drive nut and axially movable and rotatably fixed relative to the drive nut and an inner sleeve is threadedly engaged with the number sleeve, the inner sleeve being axially movable and rotatably fixed relative to the housing. A mid-body is axially fixed inside of the housing. A spring is provided that assists a user of the device during a dose administration step.

A drive mechanism for a medication delivery device is presented having a housing, a rotation member that rotates in a first direction with respect to the housing during setting of a dose of a medication and rotates in a second direction with respect to the housing during delivery of the dose, the second direction being opposite to the first direction. The device also has a piston rod that is displaced in a distal direction with respect to the housing for delivering the dose, a drive member which follows rotational movement of the rotation member in the second direction during delivery of the dose, and a stop member which prevents rotational movement of the drive member with respect to the housing in the first direction during setting of the dose.

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.