A locking mechanism for use in a medicament delivery device prevents unintended movement or premature activation of a medicament delivery member cover while a protective cap is attached to the medicament delivery device. Removal of the protective cap unlocks the locking mechanism that can include a protrusion projecting radially inward from an interior portion of a protective cap and a locking ring having an annular shape and being rotatably positioned within the interior of the cap. The locking ring may include a first slot and a second slot, wherein the protrusion is slidably positioned within the first slot and the second slot is located at a distal end of the locking ring. A through hole opening in the locking ring allows the locking ring to rotate relative to the medicament delivery member cover from a locked position to an unlocked position when the cap is moved axially.

Disclosed is a device for the parenteral delivery of a medication, such as a drug. The device includes upper and lower housings in which the upper housing is configured to move relative to the lower housing as a result of application of an external force to permit the user of the device to control the rate at which the drug is administered.

An injection device for delivering an agent into a patient’s body including a drive module and an injector module. The drive module includes a canister and puncture mechanism in a first chamber, a plunger in a second chamber communicating with the first chamber, and an actuator that moves the puncture mechanism to cause a puncture pin thereon to penetrate a septum of the canister and cause the gas within the canister to flow through the first chamber into the second chamber. The plunger includes a proximal end including a piston and a distal end and is configured such that gas entering the second chamber causes the plunger to move from an initial position to an extended position for delivering one or more agents from the injector module, the piston including one or more passages that allow gas from the canister to pass through the piston into the second chamber around the plunger.

The invention provides a needle-free injection system, which mainly includes a pressure accumulator, an output pipe, a delivery device and a fluid supply device. The front end of the pressure accumulator is connected to the output pipe, and the bottom end of the pressure accumulator can be connected to the fluid supply device and/or a hand-holding device. A control panel and a shooting button are fixed on the outer surface of the pressure accumulator. The control panel is electrically connected to the delivery device, and can store a delivery program to control the delivery steps of a delivery material stored in the delivery device, such as the delivery time, delivery quantity or delivery times of the delivery material into the output pipe. In this way, not only the convenience of use can be improved, but also the use space of the needle-free injection system can be reduced.

An apparatus includes a housing, a carrier, and an expandable assembly. The housing defines an opening configured to selectively place a gas chamber of the housing in fluid communication with an exterior volume. The carrier is movably disposed within the housing and is coupled to a medicament container. A proximal surface of the carrier defines a portion of a boundary of the gas chamber. The expandable assembly has a first member and a second member. The first member is coupled to an elastomeric member disposed within the medicament container, and the second member includes a valve portion. The expandable assembly transitions from a collapsed configuration to an expanded configuration when the elastomeric member moves within the medicament container. The valve portion moves relative to the opening when the expandable assembly transitions from the first to the second configuration, placing the gas chamber in fluid communication with the exterior volume.

Syringes are described herein. In certain embodiments, a syringe includes a syringe body, a movable plunger, and a biasing member. The syringe body defines a cavity and a port in fluid communication with the cavity. The movable plunger is disposed within the cavity. The plunger and cavity define a volume. The port is in fluid communication with the volume. The biasing member is coupled to the plunger. The biasing member is configured to urge the plunger toward the port to dispense a fluid stored within the volume at a desired rate.

A drug delivery device, in the form of an injector, may include one of a number of systems for limiting the delivery of a medical fluid or drug product in case of movement of (e.g., removal of) the injector relative to the patient as determined by a proximity sensor. The drug delivery system may in the alternative or in addition include systems for indicating the amount of medical fluid or drug product delivered (or not delivered) in case of movement of (e.g., removal of) the injector relative to the patient as determined by the proximity sensor. The injector may be, for example, an on-body injector or an hand-held autoinjector.

An apparatus includes a housing, a medicament container, an actuator, and a biasing member. The actuator is configured to move the medicament container within the housing when the actuator is moved from a first configuration to a second configuration. The actuator includes a gas container and a puncturer. When the actuator is in the first configuration, a portion of the puncturer is disposed apart from the gas container. When the actuator is in the second configuration, the portion of the puncturer is disposed within the gas container. The gas container has a longitudinal axis offset from a longitudinal axis of the medicament container. The biasing member is configured to bias the actuator toward the second configuration.

The present disclosure relates to a drug delivery device, comprising a housing, a cartridge, the cartridge containing a drug in a quantity sufficient for a plurality of doses of the drug, a bung, the bung being movably retained within the cartridge to dispense a dose of the drug from the cartridge upon movement of the bung with respect to the cartridge, and a drive mechanism, the drive mechanism being operable to transfer a driving force to the bung to dispense the dose of the drug from the cartridge. The drug delivery device is configured such that the maximal driving force which is transferrable to the bung via the drive mechanism varies and is adjusted to the current position of the bung within the cartridge.

A needleless injection apparatus is provided which forms a suitable contact state between an injection opening and an injection object. The needleless injection apparatus is provided with an expansible bag body, a needleless syringe including no injection needle, and a gas supply unit for supplying the expansion gas to the bag body. Here, the needleless syringe has a nozzle portion for injecting an injection objective substance toward the injection object surrounded by the bag body. Then, the bag body includes a first bag portion arranged at any of locations except an arrangement location of the needleless syringe so as to pressurize the injection object by expansion, and a second bag portion arranged at a location at which the nozzle portion is sandwiched between the second bag portion and the injection object so as to push the injection opening to an injection object side by expansion.