A hard package assembly is disclosed having a cam mechanism for ejecting a syringe from a hard package container with the use of a single hand. The cam mechanism including a push button and a button retainer, the push button having a trapezoidal body having a button face, a distal face adjacent and distal to the button face and a sloped face opposite the button face, the button retainer having a proximal portion, a distal portion in contact with the sloped face of the push button and a distal hook in contact with a bottom surface of the barrel flange. A method of use and a method of assembly are also disclosed.

Embodiments of a retractable syringe assembly are provided that include a dual syringe barrel configuration. One or more embodiments include reuse prevention features and features that prevent premature activation of the retraction mechanism. Methods for aspirating and expelling liquid from medical devices are also provided.

A pneumatically activated retractable-needle syringe comprising a syringe barrel, a plunger, a needle, a needle hub, a locking tip, a propellant gas release cell and a rupture mechanism is provided. The plunger is slidably disposed within and sealingly engaged with the syringe barrel, the plunger having a retraction lumen defined for receiving a needle when the retractable-needle syringe is actuated. The needle is coupled to a distal end of the syringe barrel and in fluid communication with a medicament chamber defined within the syringe barrel distally of the plunger. The needle hub is for securing the needle at the distal end of the syringe barrel, the needle hub being initially secured within a false wall against a loading force or an injection force applied by a user, and releasable from the false wall in response to a post-injection force applied by a user. The locking tip is provided at a distal end of the plunger, the locking tip being in sealing engagement with and initially secured within the retraction lumen against a loading force or an injection force applied by a user, and releasable for sliding retraction within the plunger lumen in response to release of propellant upon a post-injection force applied by a user, the locking tip being engageable with the needle hub in response to the post-injection force to provide a retraction assembly comprising the locking tip, the needle header, and the needle. The propellant release cell is positioned distally of the needle hub and contains a propellant. The rupture mechanism is positioned to puncture the propellant release cell in response to the application of the post-injection force by a user to thereby drive retraction of the retraction assembly within the retraction lumen.

Embodiments of a retractable syringe assembly are provided that include a dual syringe barrel configuration. One or more embodiments include reuse prevention features and features that prevent premature activation of the retraction mechanism. Methods for aspirating and expelling liquid from medical devices are also provided.

Disclosed is a fluid product injection device comprising: —a syringe comprising a vessel (1) containing fluid product to be injected, a piston (3) being arranged so as to be axially movable in the vessel (1) and a needle (2) provided with an injection tip (20) being attached to the vessel (1), —a piston rod (5) axially movable relative to the vessel (1) and cooperating with the piston (3) during injection in order to move it axially in the vessel (1), —a sleeve (10) arranged around the syringe, being axially movable relative to the vessel (1) between an idle position, in which the sleeve (10) does not cover the injection tip (20) of the needle (2), and a projecting position, in which the sleeve (10) covers the injection tip (20) of the needle (2), the sleeve (10) being in its idle position before actuation of the injection device, the sleeve (10) being moved towards its projecting position after the injection of the fluid product, the sleeve (10) being moved by the piston rod (5).

Needle assemblies for retractable needle syringes include a needle, a needle seal, and a needle retainer, wherein the needle includes one or more barbs substantially at its proximal end. The needle retainer engages an optional needle-over-mold component that is fixedly attached to the needle. The needle-over-mold may be connected to the distal surface of the needle seal and may travel, such as by being a couple component, with the needle during the operation of the syringe. A safety syringe includes a barrel having a needle assembly mounted at a distal end and a plunger assembly mounted at a proximal end. A drug may be contained in a drug chamber of barrel, between the plunger assembly and needle assembly, proximally of the needle seal for drug delivery to a user. The plunger assembly includes a plunger seal having a needle-engaging portion to capture the needle at the barb for retraction.

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; and a needle having proximal and distal ends, the proximal end comprising an anchoring geometry configured to be at least partially inserted 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.

A syringe (100) comprising a barrel (111) with a lumen is provided. The barrel (111) is adapted to contain a drug, the barrel (111) having a distal end wall portion (198) and a tubular wall (112) extending proximally from said distal end wall portion (198), whereby the barrel (111) extends along an axis (1000). The distal end wall portion (198) has an opening (199) extending into a syringe head (140) adapted to receive a syringe needle, said syringe head (140) having a lumen smaller in transversal cross-section than the barrel lumen; the syringe (100) further comprising: a plunger (196) extending along the axis, said plunger shaft being displaceable along the axis (1000) within said barrel (111).

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; and a needle having proximal and distal ends, the proximal end comprising an anchoring geometry configured to be at least partially inserted 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.

A single-use medical syringe having a plunger with a sealing element arranged on a distal end of the plunger head to contact the medicament in the syringe body and one or more hollow piercing elements disposed in the interior of the syringe body between a distal surface of the interior and the sealing element of the plunger head, wherein the one or more hollow piercing elements are arranged axially with respect to the syringe and positioned to be driven though the sealing element when the sealing element is driven against the distal surface at the end of the injection operation, wherein, at the end of the injection operation, the one or more hollow piercing elements create a fluid passageway across the plunger head when the one or more hollow piercing elements pierce through the sealing element of the plunger head.