The present invention relates to a portable device for injecting a substance, comprising a supply circuit comprising a chamber having a first end with an outlet orifice and an open second end, a piston extending towards the inside of the chamber from the second end, the chamber having a volume that can be varied by the movement of the piston, a first electric motor (12) for moving the piston, the outlet orifice of the chamber being connected to a retractable injection needle (11) so as to supply this needle with the contents of the chamber. According to the invention, with the injection device comprising an injection-device body, the supply circuit is placed in the portable injection-device body, the injection-device body comprises a system for driving the needle (11) between a first position, in which the needle is housed inside the body of the injection device, and a second position, in which the needle (11) projects from the body of the injection device, the system for driving the injection needle (11) comprising a second motor (13) distinct from the first electric motor (12) so that the functions of retracting/deploying the injection needle (11) and of refilling/discharging a dose of substance are dissociated from one another.

A system for injecting includes a cartridge body defining a proximal opening and a distal needle interface. The system also includes a plunger member defining a plunger interior and configured to be manually manipulated to insert a stopper member relative to the cartridge body. The plunger member includes a needle retention feature disposed in the plunger interior, an energy-storage member disposed in the plunger interior, and an energy-storage member latching member disposed in the plunger interior. The system further includes a needle hub assembly coupled to the distal needle interface of the cartridge body. The needle assembly includes a needle having a needle proximal end feature, a hub, and a needle latching member configured to couple the needle to the hub. The needle is retractable into plunger interior upon manipulation of the plunger member to actuate the energy-storage member latching member.

One embodiment is directed to a system for injecting, comprising a syringe body defining an interior medicine chamber; a stopper member configured to be inserted into the interior medicine chamber to contain medicine within the medicine chamber; a plunger member configured to be manually manipulated to insert the stopper member relative to the syringe body; a needle having proximal and distal ends, the proximal end comprising an anchoring geometry configured to be at least partially penetrated into the stopper member such that upon retraction of the stopper member, the needle is pulled proximally along with the stopper to be at least partially contained within the interior medicine chamber; and an energy-storing member operatively coupled between the stopper member and the syringe body, the energy-storing member configured to facilitate retraction of the stopper member relative to the syringe body.

A low retraction activation force plunger sub-assembly for an automatic injector includes: a plunger outer having one or more engagement prongs, a plunger inner having a shoulder, and a plunger biasing member retained in a first energized state between said plunger outer and plunger inner when the engagement prongs of the plunger outer are releasably engaged with the shoulder of the plunger inner. An automatic injector includes a housing, an activation mechanism, an actuation mechanism, and a syringe cartridge having the plunger sub-assembly and a needle assembly, wherein the actuation mechanism includes comprises an actuation biasing member residing in an initial energized state substantially within an upper portion of an actuation pill. A method of assembling the automatic injector includes the steps of: assembling the plunger sub-assembly and inserting the plunger sub-assembly into the housing such that a proximal end of the plunger sub-assembly contacts the actuation pill.

A housing blank and an activation member blank for a medicament delivery device are disclosed, with a kit including a housing blank and an activation member blank, and a medicament delivery device assembled from the kit. The housing blank includes a mid portion having a through-opening for receiving a proximal end portion of a medicament container assembly, and first and second legs foldable relative to the proximal end portion. The activation member blank includes a central portion and a first and second arm foldable relative to the proximal end portion.

An autoinjector drug delivery device configured with a stall and endpoint detection algorithm is described that allows for variations in the fill of the drug, barrel, plunger, and other components. The stall or end point detection causes the autoinjector to stop an extrusion process.

A container for delivering a medicament to a target location includes a housing having a proximal end and a distal end, the housing including a cap locking tab at the distal end, and a vial containing the medicament. The container includes a plunger slidable within the vial from a proximal end to a distal end of the vial to dispel the medicament, an injection member associated with the distal end of the vial, such that the medicament dispelled from the vial passes through the injection member to the target location, and a slidable interaction member associated with the distal end of the vial configured to slide with the vial. An interaction between the slidable interaction member and the cap locking tab causes the cap locking tab to bias outward, and placement of a safety cap on the container after use locks the safety cap onto the container via an interaction with the cap locking tab.

A safety syringe has at least two angled lock extensions on opposing sides of a plunger shaft. A plunger tip integral with the shaft has at least a pair of locking lugs. A syringe barrel has a needle assembly housing end securing the needle assembly in place for injections. The needle assembly has a needle secured in a needle housing and at least two locking ledges formed as an integral part. The end cap further comprises an opening sized to receive the shaft to fit and move back and forth, and at least two locking edges. The locking edges engage with the angled lock extensions to lock the plunger in place when fully withdrawn. The locking ledges on the needle housing engage with the locking lugs when the plunger tip is pushed into the needle housing, so as to use to retract the needle into the barrel.

An attachable needle assembly (2) used on a medication delivery pen (4). the needle assembly (2) comprising a spike (9) configured to pierce a vial, reservoir or cartridge septum of the pen (4), a needle guide (12) configured to mate with the pen (4), the needle guide (12) enclosing a septum (22) of the needle assembly (2) defining a septum chamber (31), the septum chamber (31) being in fluid communication with the spike (9), a plurality of needles (34) disposed in the septum (22) of the needle assembly (2), a sterility barrier (60) enclosing each of the plurality of needles (34), each of a plurality of sterility barriers (60) having a peel tab (70), each of a plurality of peel tabs (70) being wrapped around the needle guide (12), wherein when one of the plurality of needles (40) is drawn from the needle guide (12) from a first position to a second position, the needle (40) fluidly communicates with the septum chamber (31), and the sterility barrier (60) and the peel tab (70) of the needle (40) are removed.

A self-retracting syringe has an injection assembly and a retraction assembly. The injection assembly has a housing, a spring rest, and a spring that is restrained initially in compression between the housing and the spring rest. A plunger rod is disposed inside the coil of the spring. A coupler in contact with the spring rest and the plunger rod releasably couples the plunger rod to the spring rest. When a latch is released, the plunger rod moves distally to urge a seal forward, which seal movement causes a hypodermic needle to extend and a medicament to be expelled through the hypodermic needle. A retraction assembly returns the hypodermic needle into the syringe body after the medicament is expelled. Embodiments of retraction assembly provide a port through which fluid may be introduced into the syringe through said hypodermic needle. Methods for filling the syringe are also described.