An injection needle assembly is presented having an injection needle; a tubular needle holder having distal engagement means and proximal engagement means; a tubular cap having proximal outer engagement means and proximal inner engagement means; a tubular needle cover having first engagement means arranged to cooperate with the proximal engagement means, and second engagement means arranged to cooperate with the proximal outer engagement means of the cap. A needle cover is arranged to be displaced from a first position wherein the second engagement means and the proximal outer engagement means prevents the needle cover and the needle holder to be axially displaced by a linear displacement, to a second position wherein the needle cover and the needle holder are distally displaced where the needle holder can be displaced distally, but not proximally.

The present disclosure relates to a needle arrangement for a drug delivery device. The needle arrangement includes a distal needle tip and a proximal needle tip. The distal needle tip is held in a distal needle holder and wherein the proximal needle tip is held in a proximal needle holder. The distal needle tip and the proximal needle tip are in fluid communication with each other through a fluid channel. The fluid channel is adapted to allow axial movement of the distal needle tip and relative to the proximal needle tip between a compact state and an extended state. A length of the needle arrangement over the distal needle tip and the proximal needle tip in the extended state is greater than in the compact state.

A medicament delivery device is disclosed, comprising a cartridge assembly that comprises a cartridge having a medicament chamber for containing a medicament, a sealing element for sealing a distal end of the medicament chamber and a coupling element attached to the cartridge. The device also includes a sealing element release member, a cannula for delivery of the medicament, and a removable cap. The device is switchable from a starting configuration in which the release member is spaced from the sealing element to an activated configuration in which the release member cooperates with the sealing element to connect the medicament chamber to the cannula. A proximal end of the release member is sealed in a release member chamber defined in part by, the sealing element and in part by the coupling element.

Drug delivery devices and related methods of assembly are disclosed. The drug delivery device may include a housing, a container, a trigger member, and an interlock assembly. The trigger member may be selectively moveable relative to the housing to activate operation of at least one activatable element of the drug delivery device. The interlock assembly may include a lever mounted rotatably relative to the housing, a proximity sensor moveable between a first position extending beyond an exterior surface of the housing and a second position retracted toward the housing, and a rotational biasing member operably connected to the proximity sensor via the lever. When the proximity sensor is in the first position, the interlock assembly may limit movement of the trigger member relative to the housing. The rotational biasing member may be configured to exert a torque biasing the proximity sensor toward the first sensor position.

An injector device includes a housing having a slot with a locking portion and a needle unit that has a needle and a slot engagement portion that extends through the slot in the housing to an external side of the housing. The needle unit is movably mounted in the housing such that movement of the needle unit relative to the housing is restricted by the slot. The injector device also includes a cartridge that is mounted in the housing, the cartridge having a reservoir for medicament. Prior to use of the injector device, the reservoir is sealed from the needle. The slot in the housing is arranged such that the needle unit can be rotated to move the slot engagement portion out of the locking portion such that the needle unit can be moved into engagement with the cartridge to place the needle in fluid communication with the reservoir.

A wearable drug delivery device that can deliver a liquid drug stored in a container to a patient is provided. The container can be a prefilled cartridge that can be loaded into the drug delivery device by the patient or that can be preloaded within the drug delivery device when provided to the patient. A sealed end of the container is pierced to couple the stored liquid drug to a needle conduit that is coupled to a needle insertion component that provides access to the patient. A drive system of the drug delivery device can expel the liquid drug from the cartridge to the patient through the needle conduit. The drive system can be controlled to provide the liquid drug to the patient in a single dose or over multiple doses.

A medicament injection device comprising: a main body configured to receive a medicament cartridge, a needle sleeve axially movable with respect to the main body, a needle holder holding a needle, and a displacement element coupled to the needle holder and disengageably coupled to the needle sleeve; wherein, upon axial displacement of the needle sleeve by a predefined distance in a proximal direction, the needle carrier and needle are displaced axially in a proximal direction.

A drug delivery device includes a housing releasably coupled with a patient, a pressure chamber disposed in the housing and including a vent, a container at least partially disposed in the pressure chamber for storing a drug connectable in fluid communication with a fluid conduit, an activation mechanism, and a relief mechanism. The activation mechanism releases a pressurized drive fluid into the pressure chamber for expelling the drug from the container into the fluid conduit. The relief mechanism is operably coupled to the fluid conduit and is adapted to open the vent to release the drive fluid from the pressure chamber in response to a predetermined condition.

The invention provides in one aspect a drug delivery device comprising a drug container assembly containing a drug, and a plunger positioned within the container assembly, the drug container assembly having an outlet for dispensing the drug, wherein, in an initial position, the outlet is sealed; a drive mechanism comprising a first stored energy source operable to apply pressure on the plunger or the drug container to pressurise the drug, and a first release mechanism operable to unseal the outlet after the drug has been pressurised. In another aspect, there is provided a drug delivery device comprising a housing, including an external housing portion configured to be held in use and a drug containing portion containing a drug, a needle assembly comprising a needle fixed to a needle hub, the needle hub configured to move relative to the drug containing portion from an initial position within the housing to an insertion position in which the needle extends beyond the housing, a first stored energy source configured to move the needle hub from the initial position to the insertion position, and a plunger within the housing and configured to move relative to the drug containing portion to eject the drug through the needle when the needle is in the insertion position.

An injector device comprising an elongate housing having a proximal end and a distal end, and configured to receive a container of medicament, a needle sleeve mounted within the housing and moveable between an extended position in which the needle sleeve at least partially extends from the distal end of the housing, and a retracted position in which the needle sleeve is received further within the housing than in the extended position, a piston rod moveable longitudinally within the housing, a piston spring configured to bias the piston rod towards a distal end of the housing to engage a container of medicament when received within the housing, and a release mechanism configured to control actuation of the piston rod. The release mechanism comprises a locking arm moveable between a locked position in which the locking arm is in cooperating engagement with the piston rod and prevents movement of the piston rod, and a release position in which the locking arm is out of engagement with the piston rod so that the piston rod is free to move longitudinally within the housing. The needle sleeve is configured such that movement of the needle sleeve from the extended position to the retracted position causes the locking arm to move from the locked position to the release position.