A biasing member for a medical injection device having a housing, a brake member, a cartridge, and an injection needle, wherein the biasing member includes a body having a first end, a second end positioned opposite the first end, a top surface, and a bottom surface positioned opposite the top surface, and an extension portion extending from the body in a direction extending from the top surface of the body to the bottom surface of the body. The extension portion is resilient.

A system for inserting a pharmaceutical cartridge into a delivery device is described. The cartridge can be inserted in an arbitrary orientation and the system reorients the cartridge to a locked orientation. For example, a driver applies a torque to the cartridge to cause the reorienting. The torque rotates the cartridge around an axis thereof until the cartridge reaches the locked orientation. When the cartridge reaches the locked orientation, an interference element on the cartridge interlocks with a complementary interference element on the delivery device to lock the cartridge in the locked orientation. Once the cartridge is locked in the second orientation, the torque causes discharge the pharmaceutical.

The present disclosure provides a needleless injection device and methods to use the same. The needleless injection device comprises a first slider, a second slider, a driving unit to move the first and second sliders, and an ampoule injection tube. The driving unit controls the movement of the first and second sliders such that the value of the combined momentum of the first and second sliders is substantially zero, and the movement of the first and second slider injects the liquid from the ampoule injection tube into a subject.

An example agent administration device may comprise a housing. The device may further comprise a sharp assembly including a delivery sharp. The sharp assembly may be reciprocally displaceable along a guide channel of the housing. The device may further comprise an access port in fluid communication with the delivery sharp. The device may further comprise an actuation assembly configured drive the sharp assembly, via urging of a single bias member, from a storage state in which the delivery sharp is within the housing, through a first extended position in which the delivery sharp extends a maximum distance from the housing and to a partially retracted position in which the delivery sharp extends a lesser distance from the housing.

A drug delivery device includes a compartment sized to receive a cartridge. The compartment includes a cartridge bay that opens so that a cartridge may be inserted into the cartridge bay and that closes when the cartridge is received by the compartment. The drug delivery device also includes a housing including an expanding assembly. The expanding assembly includes a driver supported from a distal end by a linear stabilizer that includes a bearing configured to push against the housing. The driver is rotated by a motor. The expanding assembly also includes two mid screws threadedly connected to the driver, a plunger driver threadedly connected to the two mid screws, and an anti-rotational guide that prevents rotation of the plunger driver.

A drug delivery device adapted to receive a cartridge and hold it in a mounted position is provided, comprising a housing, an expelling assembly, and a front-loaded cartridge holder assembly adapted to receive and hold a cartridge in a mounted state. The assembly comprises cartridge holding means actuatable between a receiving state and a holding state, as well as a user operated actuation sleeve being rotationally actuatable relative to the housing between a loading state and an operational state, such that the cartridge holding means is actuated from the receiving state to the holding state when the actuation sleeve is actuated from the loading state to the operational state. The actuation sleeve is configured to enclose at least a portion of a mounted cartridge and is provided with inspection means allowing at least a portion of an enclosed cartridge portion to be visually inspected.

A system is disclosed for inserting a pharmaceutical cartridge into a delivery device. Optionally the cartridge is inserted in an arbitrary orientation. Optionally, the system reorients the cartridge to a locked orientation. For example, a driver applies a torque to the cartridge to cause the reorienting. For example, said torque rotates the cartridge around an axis thereof until the cartridge reaches the locked orientation. Optionally, when the cartridge reaches the locked orientation an interference element on the cartridge interlocks with a complementary interference element on the delivery device to lock the cartridge in the locked orientation. Optionally when the cartridge is locked in the second orientation, the torque causes discharge the pharmaceutical.

A drug delivery device is proposed, comprising: a housing; a drive mechanism; a cartridge containing a drug, the cartridge being retained in a defined position relative to the housing, wherein the drive mechanism is configured to dispense drug from the cartridge; a cartridge bias system, which comprises at least one resilient member and at least one rigid force transfer body, wherein the rigid force transfer body is movably retained in the housing, wherein the cartridge bias system is arranged and configured to exert a force on the cartridge to maintain the cartridge in the defined position, wherein the force is provided by the at least one resilient member, and wherein the rigid force transfer body is operatively connected to the at least one resilient member such that the force is reacted by the rigid force transfer body. Further, a method to modify a drug delivery device is disclosed.

An arrangement of drug delivery devices is provided with interchangeable members and non-interchangeable members.

The present application relates to shock absorbers for injection devices. According to a first aspect, this specification discloses an injection device comprising: a medicament container; a stopper translatably disposed within the medicament container; and a plunger rod comprising: a plunger rod body; and a shock absorber, wherein the plunger rod is operable to displace the stopper; and wherein the shock absorber contacts the stopper during displacement of the stopper by the plunger rod, thereby reducing an impact force between the plunger rod and the stopper.