Abstract: An injection device includes a housing having a proximal end and a distal end, the housing defining a distal opening, and a first opening in a side of the housing and between the proximal and distal ends; a propellant disposed inside the housing and spaced from the distal end; and a movable member disposed inside the housing and between the distal end and the propellant, wherein the propellant is in fluid communication with the movable member and the first opening.

Abstract: A single-hand controlled syringe having a plunger slidably mounted within a barrel. The plunger and barrel are of double wall construction with the outer wall of the plunger being slidably mounted in the space between the inner and outer walls of the barrel. A spring is mounted in the space between the inner and outer walls of the plunger. By this construction and arrangement, the alignment of the plunger within the barrel is maintained; the spring is hidden from view and the syringe can be easily assembled and disassembled for cleaning.

Abstract: A safety syringe includes a flexible holder-supporting seat that is sleeved around and that clamps a needle holder within a front end portion of a syringe barrel. A flexible sealing member seals an open front end of a plunger so as to define a vacuum chamber in the plunger. When the plunger moves within the barrel to a front limit position, a holder-retaining front portion of the sealing member engages and retains the needle holder thereon, and the plunger pushes the holder-supporting seat to separate from the needle holder such that the sealing member and the needle holder move rearward within the syringe barrel due to negative pressure produced in the plunger, thereby retracting a needle into the syringe, barrel.

Abstract: A disposable unit-dose jet injection syringe having a cylindrically shaped syringe body. The syringe body has a rear open end and a forward closed end. The rear open end has an enlarged diameter forming a flange that retains the syringe to the driving system during the injection cycle. The closed end has an small area coined by a stamping process. A jet orifice is punched through the small area of the closed end. A cavity formed in syringe body is configured to hold a unit dose of liquid, drug, or biological. A piston is slidably engaged within the body to inject the unit dose. A driving system activates the piston to inject the unit dose out of the jet orifice. A method of manufacturing a jet injection syringe is also provided. A method of injecting a medicine is also provided.

Abstract: A single use retractable syringe and plunger are provided. The syringe has a barrel having a collar with one or two projections that slidably engage a plurality of interconnected slots of the plunger. The slots of the syringe include one or more gates or abutments that restrict slidable movement of the projections within the slots to thereby prevent re-use of the syringe after injection and subsequent retraction of the needle.

Abstract: An insertion device and insertion set. The insertion device for inserting at least a portion of at least one piercing member of an insertion set through the skin of a patient includes a device housing, a carrier body and a driver. The carrier body is slidably received within the device housing for movement between an advanced position and a retracted position. The carrier body also includes a receiving structure to support the insertion set in a position with the at least one piercing member oriented for insertion through the skin of the patient at a predetermined angle relative to the skin of the patient upon movement of the carrier body from the retracted position to the advanced position.

Abstract: The present invention relates to a medicament delivery device such as a pen type injector used to expel medicament from a medicament cartridge under the action of a lead screw. The medicament cartridge typically comprises a cylinder having a displaceable piston at one end displacement causing medicament contained within the cartridge to be expelled. It is of advantage to know when the plunger contacts the displaceable piston since no delivery of medicament can occur before this point.

Abstract: A single-use syringe has a barrel which can constitute a one-piece extrusion, and a shank which is reciprocably guided in the barrel and the distal end of which carries a plunger movable in the barrel toward and away from the needle-carrying front end portion of the barrel. The coupling between the plunger and the shank includes a set of circumferentially spaced-apart breakable spokes which can be of one piece with the distal end of the shank as well as with the plunger. The spokes break not later than when the shank completes a forward stroke during which the plunger expels a flowable substance, such as a medicine, from a chamber located in the barrel between the needle-carrying front end portion and the plunger. The plunger, the spokes and the shank can constitute a one-piece extrusion.

Abstract: A syringe apparatus and process is provided for retracting a needle from a hypodermic syringe following the completion of an injection. The hypodermic syringe has a plunger which, upon completion of the injection, is forced downwardly against a needle support deformable base, severing sacrificial supports. An end portion of the needle tears a base portion of the plunger and propels the needle into a hollow region of the plunger such that the needle is contained entirely within the plunger.

Abstract: A syringe device includes a barrel in which a stopper connected to a plunger is movably received, and an engaging section extends from an end of the barrel. A base member is disengagably received in an engaging section of the barrel and a needle cannula is connected to the base member. The stopper has a protrusion which is engaged with a recess in the base member when the stopper is moved to a extreme position when pushing the plunger. The base member is disengaged from the engaging section and moved into the barrel together with the stopper when the plunger is pulled backward. A pushing device is located between the base member and the stopper to tilt the base member in the barrel.

Abstract: A safety syringe with a hollow barrel housing and a retraction trunk coaxially formed within the housing to forming an annular chamber between the inner surfaces of said outer elongated hollow barrel and the outer surface of said retraction trunk. A needle cannula carriage is held within the distal end of the retraction trunk by a latching means and a biasing means. A needle cannula module is suitably fixed to the distal end of the needle cannula carriage wherein a cannula or passage provides fluid communication from the needle cannula module, through the needle cannula carriage, through the retraction trunk and into the annular chamber. An annular plunger is provided between the inner surfaces of the outer elongated hollow barrel and the outer surface of the retraction trunk, wherein said annular plunger forces fluid through said annulus and into a body.

Abstract: An insertion device and insertion set. The insertion device for inserting at least a portion of at least one piercing member of an insertion set through the skin of a patient includes a device housing, a carrier body and a driver. The carrier body is slidably received within the device housing for movement between an advanced position and a retracted position. The carrier body also includes a receiving structure to support the insertion set in a position with the at least one piercing member oriented for insertion through the skin of the patient at a predetermined angle relative to the skin of the patient upon movement of the carrier body from the retracted position to the advanced position.

Abstract: A mounting member for attaching a front-loading syringe to a powered injector is disclosed. The present invention may also include a plunger that has a two-piece molded core portion that is readily attachable to a plunger drive member of a powered injector. The plunger core may also be equipped with an anti-cocking flange to prevent the plunger from being axially misaligned within the syringe body which could result in fluid leakage between the plunger and the syringe body. An alignment flange may also be provided on the plunger to assist with the proper insertion of the plunger into the syringe during the assembly process. A method of manufacturing a syringe plunger is also disclosed. The present invention further includes a sleeve for clampingly engaging a heating blanket to the outer surface of a syringe.

Abstract: A hypodermic syringe with a selectively retractable needle includes an elongate barrel defining a receiver and a hollow bore. The syringe has a plunger with an elongate cavity open to the proximal end. The plunger is sized to fit within the bore of the barrel for a slidable movement to define a chamber for receiving and expelling fluids. The inside diameter of the cavity in the plunger is sufficient to accept telescopically at least a part of a first portion of the plunger. A second portion and the first portion are joined at an attachment to form a shoulder extending outwardly from the first portion, with the plunger being telescopically collapsible by movement of the second portion into the cavity by of sufficient distal force to frangibly disrupt the attachment. The syringe includes an elongate sleeve sized to fit over the first portion of the plunger and extend from the shoulder. The plunger includes a stopper to a form fluid tight seal with the barrel.

Abstract: An instrument for subretinal implantation comprising an elongate tube having a distal end and a proximal end, the tube having a lumen passing from the proximal end to the distal end, the distal end having a distal tip, wherein the lumen forms an opening in the tip, the instrument further including a plunger, the plunger being capable of sliding motion within and with respect to the tube, wherein the outer diameter of the distal end of the elongate tube is sufficiently small to be inserted through the pars plana area of an eye and the length of the distal end of the elongate tube is sufficient long to permit the opening in said tip to thereafter be inserted beneath the retina through an opening therein, wherein the plunger can express material within the lumen therefrom through the opening in the tip into the subretinal space of an eye into which the tip is inserted.

Abstract: This invention relates to a drug cartridge assembly for use with a reusable body assembly of a medication delivery pen. The drug cartridge is disposable and is in the form of a single integral unit having a generally tubular barrel. Medication is pre-filled into the drug cartridge and is retained therein by an elastomeric stopper or plunger. The plunger is in sliding fluid-tight engagement with a tubular wall of the barrel. A proximal end of the tubular barrel is configured for interconnecting the drug cartridge with a pen body assembly and a distal end of the tubular barrel is configured to securely but releasably engage a needle cannula assembly.

Abstract: Three collar groups 6A through 6C, each group comprising collars 5a through 5b, 5c through 5e and 5f through 5h which are thin walled and close to each other are provided in a spaced manner in a piston sliding direction. A first group 6A which is provided at the front most end of the piston head 5 comprises two collars 5a and 5b. The front collar 5a which is in contact with the liquid drug has a larger diameter than that of the rear collar 5b. First and third collar groups 6B and 6C which are at the rear of the first collar group 6A comprise three collars 5c to 5e and 5f to 5h, respectively. The intermediate collars 5d and 5g have larger diameters than those of the front and rear collars 5c and 5e; and 5f and 5h, respectively. A support collar 5i is provided at the rear of the collar groups 6B and 6C in such a manner that it is spaced therefrom. The support collar 5i has a thick walled portion x at its base excepting the peripheral edge thereof.

Abstract: The invention provides an injection device comprising an open cavity (2), an injection needle (9) projecting from the bottom of this cavity (2), a first leakproof compartment (6) delimited by a first section of a mobile barrier (11), first devices (13) for displacing the said first section of a mobile barrier (11) to vary the volume of the compartment, at least one passage (7) communicating between the said first leakproof compartment (6) and the said cavity (2), a second leakproof compartment (5) for a product to be injected, delimited by a second section of a mobile barrier (10), and second devices (12) for displacing the said second section of a mobile barrier (10) to vary the volume of the compartment. The said first and second leakproof compartments (5, 6) extend longitudinally within a tubular body (1).

Abstract: A syringe is provided that has an opaque barrel and a light colored outlet portion. The opaque barrel protects dental composite material or other light-activating material contained in the barrel from premature exposure to light. The light colored outlet portion has a color that is similar to that of the dental composite material. The outlet portion may be tubular and extend coaxially within the barrel beyond the barrel. The outlet portion may include a divider that divides the material into at least two separate portions.

Abstract: Various sealing structures are used in a front-loading injector, for preventing leakage of spilled fluid from an external surface of a syringe into the vicinity of the drive ram. For example, a sealing gasket may be incorporated into the front face of the injector housing, for mating to the rearward circular edge of the cylindrical body of a syringe. Alternatively, sealing and locking functions may be performed by a single structure on the rearward end of the syringe. Further, leakage may be prevented by including a non-planar sealing flange on the syringe, positioned on the syringe forward of the locking structure, or by a two-piece structure, including a syringe and a separate leakage stopping washer for surrounding the syringe to halt the flow of fluid along the exterior of the syringe. (As part of this aspect, or as an independent feature, the syringe may include an annularly discontinuous flange forward of the locking structure, for providing mechanical support for the syringe against the injector.

Abstract: A syringe of improved ergonomics having an ellipsoidal barrel which contains an ellipsoidal plunger. The plunger consists of: a plunger tip of a rigid, non-elastomeric material which interfaces a medical fluid contained in the syringe barrel; and an elastomeric ring which slideably interfaces the inside wall of the syringe barrel. In one embodiment the plunger contains a plastic plunger insert which supports the elastomeric ring, the interior of which is provided with an ellipsoidal cavity. A self-aligning plunger rod having a ball portion on its distal end is inserted into the cavity of the plunger insert. The ball portion freely moves in the cavity and directs the external force exerted on the plunger rod in an axial direction.

Abstract: A receptacle for a filling material is disclosed, which is provided with a plunger which consists, at least in part, of a deformable material on a portion of the plunger which faces the nozzle. In one embodiment, the plunger disclosed can be a double plunger (a two-part plunger) displaceable axially into a defined end position in the direction of the nozzle, the deformable portion of which penetrates into the outlet channel of the nozzle, forcing out the dental filling material located there. It is preferred that the volume of deformable material of the nozzle penetrating into the nozzle is no greater than the volume of the nozzle through which the filling material passes.

Abstract: A disposable hypodermic syringe comprises an outer barrel, an inner barrel slidingly disposable in the outer barrel, a hypodermic needle disposed axially at the front end of the outer barrel so as penetrate its front end wall and being held, at its rear end, by the front end wall of the inner barrel, and a plunger which is slidingly disposable in the inner barrel. The outer barrel includes elements for interlocking with the inner barrel when the inner barrel is in a fully inserted position. The plunger includes release elements for releasing the inner barrel from the outer barrel while interlocking with the inner barrel so as to allow the inner barrel and the plunger to be withdrawn in combination with the hypodermic needle for a distance sufficient to displace the needle into a space formed between the outer barrel and the inner barrel.

Abstract: A plastic pump piston is provided for a disposable syringe, wherein the disposable syringe has a syringe cylinder which is constructed with a needle cone on one end thereof and at least one gripping plate on the other end thereof, and having a sealing element on the front end of a shaft of the pump piston. The sealing element is made of a material having a higher elasticity than the pump piston material and is molded onto the pump piston in the same mold after the pump piston is injection molded.

Abstract: A front-loading syringe which comprises a movable plunger for injecting liquid contrast media, is rotatably mountable on a front wall of an injector housing with an interference fit and in sealed relationship with respect thereto, with or without a pressure jacket, by a first-quick release mechanism. At the same time, the plunger is connected to an injector drive mechanism by a second readily releasable mechanism. During the mounting operation, a sensor reads injection information from an indicator device on the syringe and feeds it to an injector control. An audible-and-tactile indicating mechanism also is activated when the syringe is essentially in the desired mounted position. The syringe may include reinforcing ribs which also function as volumetric gradations, and liquid media presence-or-absence indicating dots which appear circular against a liquid media background and oval-shaped against an air background.

Abstract: A device and method for providing a suspended agent such as a contrast agent without mechanical resuspension. A volume of agent is divided into sub-volumes in a network of tubes, cells, sponges, grooves, etc. A propellant fluid flows through the network to release the suspended agent. The network may be internal to a container for the propellant fluid. Alternatively, the network may be adjacent an exit port of a container for the propellant fluid, or may be in-line between a propellant fluid container and a patient. The invention reduces sedimentation of agents into one or a few aggregates and eliminates a mechanical mixing step. The invention thus provides a uniformly suspended agent, improving patient health and safety and increasing cost and time savings.

Abstract: An improved assembly of a syringe and a nozzle tip for aspirating marrow blood from a surgical site and a method for using this improved syringe. The syringe includes a nozzle tip of special construction which has a sleeve portion, which fits on the free end of the barrel of the syringe, and a curved aspirating nozzle end. The nozzle tip includes a filter screen of preselected mesh size. A sufficient amount of marrow blood is aspirated through the curved aspirating nozzle end and the filter screen of the nozzle tip, thereby moving a preselected amount of marrow blood into the barrel of the syringe. The aspirated marrow blood then mixes with the granules of bone regeneration material disposed in the barrel of the syringe to form a viscous fluid mixture therein. The excess marrow blood, if any, is expelled through the curved aspirating nozzle end by applying a moderate manual pressure to the plunger of the syringe.

Abstract: A syringe, for injecting anesthetic contained in a medicine vial. The syringe includes a housing having a needle end and a plunger end, connected by a body; to which housing is attached a plunger assembly having a plunger at the plunger end. There is a vial slot in the housing, cooperatively sized for receiving a medicine vial. A needle assembly slot is in the body, at the needle end, for receiving a needle assembly from a side of the body. A seat at the needle end of the housing receives and locates a corresponding seat portion of the needle assembly within the housing. Depressing the plunger housingward impales the vial onto a penetrator of the needle assembly and seats the assembly firmly.

Abstract: The invention provides for dispensing a bone substitute material, comprising: an elongated body having an outer wall, a front opening, and a rear opening, with the outer wall defining a longitudinally extending interior space therein. The invention also includes a cover for the front opening having a sealable opening therein to allow substances to pass through the opening. A plunger sized to slide within the longitudinally extending cavity divides the cavity into first and second portions. The plunger preferably has a small opening therein to allow passage of fluids (including gases), from the longitudinally extending interior space without permitting solids to pass therethrough. A detachable handle connects to the plunger for sliding the plunger toward or away from the front opening.

Abstract: An injection device has a housing (50, 60) and therein a spring for storing energy for an injection operation. The spring (94) impinges, in the proximal direction, upon an ejection member (92) for ejecting injection liquid (16) from a vessel, displaceably arranged in the housing, at whose proximal end an injection needle is attached. Located in the housing is a displacement member (36), displaceable in the longitudinal direction, for displacing the vessel (14) in the proximal direction, in order to effect a movement of the injection needle (18) in the proximal direction and, thus, its insertion. Provided on the ejection member (92) is a detent lug (100), associated with which is a corresponding detent opening (102) in the displacement member (36). A control member (70), effective in travel-dependent fashion, serves to disengage the detent lug (100) from the detent opening (102) when the displacement member (36), during the injection operation, has traveled a predefined distance in the proximal direction.

Abstract: A rack is provided for holding a set of syringes. The syringes may be conventional syringes or unique syringes that have a hollow elongated barrel engaged by a plunger with unique relative lengths. The rack is configured to rest on a flat surface and hold the syringes so that the syringes are horizontal relative to the flat surface for easy viewing. The rack has a series of cradles adapted to hold the barrels of syringes. Each cradle has a slot configuration with an open top, two opposing sides and a bottom surface so that all of the syringe barrel can be seen to enable a user to quickly identify the contents of the syringe based on indicia on the barrel. The cradles preferably have raised portions that act as locking extensions to provide a tight fit with the syringe barrel.

Abstract: A threaded syringe provides a mechanism by which a clinician can deliver a viscous fluid through a relatively small lumen and can obtain tactile or audible feedback of delivery. The threaded syringe allows for delivery of more viscous fluids with less force and/or allows for more controlled delivery. The syringe includes a syringe barrel and a sliding member positioned on the proximal end of the syringe barrel. The sliding member has a first threaded hole and a second hole. The sliding member is slidable on the syringe barrel between a first position at which the first threaded hole is aligned with the syringe barrel for precise delivery of a material from the syringe and a second position at which the second hole is aligned with the syringe barrel for filling of the syringe or to stop bleed out.

Abstract: A self-sheathing dental needle includes a finger grip slideably mounted to a syringe body and a plunger to expel a fluid medicament from the syringe body. The finger grip is formed with a tang that is positioned near the distal end of the syringe body when the finger grip is fully advanced in the distal direction. A needle cartridge is provided having a needle mounted in a needle holder, a sheath slideably mounted to the needle holder, and a lock body for locking the sheath in position over the distal end of the needle. When the cartridge is attached to the syringe body and aligned, the lock body can be reconfigured to release the sheath for movement relative to the needle. Specifically, the finger grip can be translated to cause the tang to engage the lock body, release the sheath, and expose the distal end of the needle.

Abstract: A safety syringe comprises a barrel having a grip lug with two fitting holes and two retaining holes communicating with each other; an elastic lashing member capable of retracting elastically and inwards, and having two locating pillars which are provided with an arresting head being retained in the retaining holes of the barrel, two slide confining portions being disposed at each side; a plunger having two slide pieces; a needle holder being caught and pulled by the plunger, and fitting a needle set. In use, the slide pieces of the plunger are confined by the slide confining portion of the elastic lashing member such that the plunger can not be turned. The plunger arrives at the bottom in the wake of injection such that the plunger is not confined by the elastic lashing member, and that the plunger can be thus turned to actuate the needle holder and drawn into the interior of the barrel by the plunger.

Abstract: A drug delivery system for administering preset doses of a substance such as a drug, vaccine or the like is provided. The drug delivery system includes a holder and a pre-filled drug container such as a syringe which is securely retained in the holder. The drug container includes a barrel for containing the substance, a movable stopper situated within the barrel, and a blunt end having an opening through which the substance within the barrel can be expelled. The holder includes a distal portion and a proximal portion, each configured to accommodate the drug container, with the distal portion being able to be assembled to the proximal portion, which acts as a plunger rod during activation of the delivery system.

Abstract: A hypodermic syringe includes a barrel with a plunger assembly slidably extending therein. The plunger assembly includes an outer plunger and an inner plunger telescoping together with a bungee resisting extension of the assembly. The inner and outer plungers may be locked in the extended position with the bungee in tension. A seal stop is located at the seal end of the plunger assembly and holds an annular seal in radial extension sealing against the internal sidewall of the barrel. A luer hub assembly is fixed at the needle end of the barrel. A plunger cap may be advanced after injection to rotate the plunger assembly. Such rotation engages a probe on the end of the plunger assembly with the luer hub, disengages the seal stop to release the annular seal, engages the seal stop with the luer plunger assembly causing release of the luer hub assembly from the barrel and releases the engagement between the outer plunger and inner plunger.

Abstract: A manually operated hydraulic syringe includes a syringe barrel. The syringe barrel has an interior surface bounding a chamber extending from a first end to an opposing second end. A manual plunger has a distal end slidably disposed within the first end of the chamber. A hydraulic plunger is slidably enclosed within the second end of the chamber. Sealed in substantial isolation within the syringe barrel is a hydraulic fluid, such as water or oil. Coupled to the distal end of the syringe barrel is a nozzle or cartridge in which a dispensing material, such as a high viscosity fluid, can be selectively disposed. Manual advancement of the manual plunger within the first chamber results in pressurization of the hydraulic fluid. In turn, the pressurized hydraulic fluid advances the hydraulic plunger under a force greater than the force applied to the manual plunger. Advancement of the hydraulic plunger within the syringe body functions to dispense the dispensing material from the attached nozzle or cartridge.

Abstract: An applicator is provided for dispensing a first and a second protein solution to form a biological adhesive where the solutions can be deflected by a deflection assembly during dispensing for the adhesive to cover a broad or limited area. The applicator includes a housing having a housing head for enclosing therein a first reservoir containing a first component, and a second reservoir containing a second component. The first and second components are preferably fibrinogen and thrombin which intermix with water to form the first and second protein solutions, respectively. The housing further includes an elongated body portion defining a longitudinal axis for enclosing therein a conduit assembly having a first and a second conduit in communication with the first and second reservoir, respectively. The solutions intermix on an application site to form a fibrin sealant. In an alternate embodiment, the applicator includes two valves.

Abstract: The invention relates to a disposable device for inserting one or several implants, said device comprising a tubular cannula (10) provided with a tip (11), said cannula also serving as a container for the implants, a plunger (20) and a handle (30) having a first end (31) directed towards the cannula (10), and a second end (32) directed away from the cannula. The plunger (20) and the handle (30) are attached or attachable to each other in a fixed manner, and the cannula (10) is arranged to be movable in the longitudinal direction, so that the plunger (20) is placed therein.

Abstract: An apparatus useful for umbilical cord care and method of its use are disclosed. The apparatus provides an injector that is detachably connected to a disposable applicator. The umbilical cord care apparatus may be provided as a kit, particularly suited for use at home.

Abstract: An automatic safety syringe (100) comprises:

Abstract: A single chamber disposable syringe containing a medicament includes a valve member positioned in the variable volume chamber adjacent to the medicament outlet for selectively communicating the variable volume chamber with the medicament outlet.

Abstract: A syringe for injecting a fluid, such as a contrast medium for radiological diagnostic imaging, is enhanced by hydrophilic treatment of interior surfaces of the syringe, reducing air bubble attachment to the syringe. Air bubbles that do form or that are drawn into the syringe fail to attach to, or readily release from, the interior surface and can be expelled prior to being used on a patient.

Abstract: The invention provides a steerable device for the delivery of a therapeutic solution, in particular, an angiogenesis-promoting substance into a heart, and a method of delivering such a substance into the heart. The device includes an elongated needle which the physician may steer by asserting a tensioning force on a steering cable coupled to the needle toward its distal end. A axially-slidable steering sleeve is disposed about the needle and the steering cable, and the position of the steering sleeve may be adjusted to control the radius of flexure of the needle. The needle body is flexible enough to maneuver around thoracic and cardiac geometry, yet sufficiently rigid to facilitate such maneuvering. The needle may also have a stop, or platform, spaced from the distal needle tip to stabilize the needle in the cardiac tissue. According to a method of the invention, the needle may be inserted into the heart tissue through lung tissue adhering to the heart, as is common in re-operative patients.

Abstract: A discoid and elastic valve is designed to block up the neck of the syringe from inside, in order to close the communication between the syringe's internal main body, where the liquid is, and the needle which is connected in the syringe neck through its plugging cone.

Abstract: Apparatus for operating eye drop dispenser is provided which includes a four bar link system in order to enable cocking firing and resetting of an actuator for dispensing eye drops upon a single button depression by a patient.

Abstract: Disclosed is a driver for use with administering multiple doses of a compound contained in a cartridge. The driver has a base, a position selector, and a plunger. The plunger shaft includes projections which engage the position selector so the plunger advances to provide a single dose of the compound. The plunger shaft is rotated to align the plunger projections with the position selector to administer a subsequent dose of the compound.

Abstract: This invention relates to a drug cartridge assembly for use with a reusable body assembly of a medication delivery pen. The drug cartridge is disposable and is in the form of a single integral unit having a generally tubular barrel. Medication is pre-filled into the drug cartridge and is retained therein by an elastomeric stopper or plunger. The plunger is in sliding fluid-tight engagement with a tubular wall of the barrel. A proximal end of the tubular barrel is configured for interconnecting the drug cartridge with a pen body assembly and a distal end of the tubular barrel is configured to securely but releasably engage a needle cannula assembly.

Abstract: A safety syringe comprises a barrel having a grip lug with two fitting holes and two retaining holes communicating with each other; an elastic lashing member capable of retracting elastically and inwards, and having two locating pillars which are provided with an arresting head being retained in the retaining holes of the barrel, two slide confining portions being disposed at each side; a plunger having two slide pieces; a needle holder being caught and pulled by the plunger, and fitting a needle set. In use, the slide pieces of the plunger are confined by the slide confining portion of the elastic lashing member such that the plunger can not be turned. The plunger arrives at the bottom in the wake of injection such that the plunger is not confined by the elastic lashing member, and that the plunger can be thus turned to actuate the needle holder and drawn into the interior of the barrel by the plunger.

Abstract: A syringe includes a needle mounted in a frangible plug at the tip thereof and is equipped with a plunger having a stopper at one end thereof with the end of the plunger having an opening for capturing the end of the needle that projects into the barrel of the syringe to allow the plunger to capture the needle so that when the plunger is retracted the needle will be withdrawn into the barrel of the syringe; the end of the plunger is also equipped with a stopper which is mounted on a section that is connected to the plunger through frangible links whereby when the plunger is withdrawn a selected distance, the links will be severed to retain the plunger and captured needle within the barrel.