A dose setting mechanism for a medicament delivery device, which dose setting mechanism comprises, a tubular member 10 having a longitudinal track 18 of a predetermined length; a dose drum 40, coaxial with the tubular member 10, and being axially and rotationally movable relative to the tubular member 10; a stop member 90, axially movable but rotationally locked relative to the tubular member 10, and further being in an axially slaved connection with the dose drum 40; wherein said stop member 90 comprises a track follower 98 in engagement with the longitudinal track 18, such that rotational movement of the dose drum 40 relative to the tubular member 10 may cause a maximum axial displacement of said dose drum 40 and said stop member 90, relative to the tubular member 10, corresponding to said predetermined length.

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.

The invention refers to a drug delivery device for selecting and dispensing a number of user variable doses of a medicament. The device comprises at least one clicker mechanism (52, 64; 143, 153) for generating a haptic and/or audible feedback during dose selecting, wherein the clicker mechanism (143, 153) generates a different feed-back when selecting single units or multiples of single units.

The present invention relates to a display arrangement for an injection device for displaying the size of a dose of a medicament, the display arrangement comprising: a housing (60) providing a rotation axis (3) extending in an axial direction (4), a first display member (22) rotatably supported inside the housing (60) with regard to the rotation axis (3) and having at least one cam (32) radially offset from the rotation axis (3), a second display member (24) rotatably supported inside the housing (60) with regard to the rotation axis (3) and arranged axially adjacent to the first display member (24), a coupling member (26) rotatably engaged with the second display member (24), wherein the coupling member (26) is engaged with the at least one cam (32) of the first display member (22) when the first display member (22) is in a predefined angular position or angular range, wherein the coupling member (26) and the first display member (22) are mutually engaged via a retaining arrangement (48) when the cam (32) and the coupling member (26) are disengaged.

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.

A dosing syringe comprising a barrel and a piston is provided. The piston is slidably receivable in the barrel and can move within the barrel from a maximum inserted position to a withdrawn position to draw a dose of product into the barrel. The syringe comprises means for pre-setting the withdrawn position, whereby to define the maximum dose which can be drawn into the barrel.

The present invention provides a drug injection device (1) for delivering multiple doses of drug, comprising: a housing (2) extending along a main axis, a dose expelling mechanism comprising a piston rod (60) configured to move relative to the housing (2) from a first position to a second position to cause ejection of a dose of drug, the piston rod (60) extending between a proximal piston rod end and a distal piston rod end and comprising a dosing track (63), the piston rod (60) further being movable relative to the housing (2) from an initial pre-use position to a final end stop position to cause accumulated ejection of a predefined total dose, a dosing track follower (17) fixed with respect to the housing (2) and adapted to travel the dosing track (63) during dose ejection, a dose setting mechanism operable to set the dose to be ejected by the dose expelling mechanism, electronic means (82, 90, 91, 92, 95) for registering a dose setting operation and for registering a dose size of an ejected dose, and a display (81) adapted to indicate a size of a current set dose, the electronic means (82, 90, 91, 92, 95) being configured to provide a first type of update of the display (81) responsive to dose changing operations of the dose setting mechanism, wherein the electronic means (82, 90, 91, 92, 95) is further configured to calculate a current accumulated dose from the dose sizes of registered ejected doses to thereby provide an updated value of a total amount of drug ejected, determine a current remaining dose by comparing the current accumulated dose and the predefined total dose, and provide a second type of update of the display (81) when during a dose increasing operation of the dose setting mechanism the current set dose exceeds the current remaining dose, the second type of update being different from the first type of update, and wherein the final end stop position is defined by a track end configuration of the dosing track (63) between the proximal piston rod end and the distal piston rod end.

An injection device incorporating a dose setting mechanism is presented where the dose setting mechanism contains a fail safe feature that activates during an interrupted dose delivery event. A dose selector having a projecting rib engages a protrusion on a snap element to prevent the dose knob from moving distally if a user removes an axial force in the proximal direction during dose delivery. The dose setting mechanism can further include a reuse prevention feature.

A dose setting mechanism for a medicament delivery device, which dose setting mechanism comprises, a tubular member (10) having a longitudinal track (18) of a predetermined length; a dose drum (40), coaxial with the tubular member (10), and being axially and rotationally movable relative to the tubular member (10); a stop member (90), axially movable but rotationally locked relative to the tubular member (10), and further being in an axially slaved connection with the dose drum (40); wherein the stop member (90) comprises a track follower (98) in engagement with the longitudinal track (18), such that rotational movement of the dose drum (40) relative to the tubular member (10) may cause a maximum axial displacement of the dose drum (40) and the stop member(90), relative to the tubular member (10), corresponding to said predetermined length.

The invention refers to a drug delivery device for selecting and dispensing a number of user variable doses of a medicament. The device comprises a housing (10), a cartridge (170) containing a medicament and a last dose protection mechanism for preventing the selection of a dose, which exceeds the amount of medicament left in a cartridge (170). This last dose protection mechanism comprises a first member (60), which is rotatable in a first direction during dose selecting and in the opposite direction during dose dispensing, a second member (50) coupled to the first member (60) and to the housing (10) such that the second member is moved relative to the first member (60) and to the housing (10) upon rotation of the first member (60) and a third member (100) which is moved relative to the first and second member (50, 60) during dose dispensing. Abutment of the second and third member (50, 100) prevents increasing the selected dose.