Abstract: A relatively stiff syringe pressure applicator having a pair of ears, the ears are overmolded with a relatively soft elastomer. A port extends through the syringe pressure applicator and is connected to friction fittings on either side of the pressure applicator. The external fitting is suitable for connecting to a source of pressurized air. The other fitting is sized and shaped to receive an elastomeric seal that may be inserted into the open end of a syringe to seal the syringe air tight.

Abstract: An injection device including a volume for accommodating a product for administration, a piston for acting upon the product within the volume, and a stopper which can be arranged between an end of the piston facing the product and the product within the volume, wherein the piston includes a piston head configured to be sealed in a gas-tight manner, the piston head being separate from the stopper such that a negative pressure or vacuum region can be developed between the piston head and the stopper.

Abstract: An administering apparatus including a casing, a reservoir, a piston accommodated in the reservoir such that it can be shifted in an advancing direction, a piston rod which acts on the piston in the advancing direction and forms a first locking mechanism, a second locking mechanism which cannot be moved counter to the advancing direction, a lock element row formed by successively arranged first locking elements, extending in the advancing direction, and formed by one of the locking mechanisms, and a second lock element formed by the other locking mechanism and engaged with the lock element row, wherein it engages with a lock element gap of the lock element row, wherein the second lock element is moved out of engagement by a movement, against an elasticity force, of the piston rod in the advancing direction, but, when engaged, counteracts a movement of the piston rod counter to the advancing direction with a resistance force greater than the elasticity force to prevent the piston rod from moving counter to the

Abstract: An ophthalmic injection device includes a dispensing chamber housing with an inner surface that partially defines a dispensing chamber for holding a substance, a plunger fluidly sealed to the interior surface of the dispensing chamber housing, and a needle fluidly coupled to the dispensing chamber. A temperature control device partially surrounds the dispensing chamber housing and alters a temperature of the substance. A piston is coupled to the plunger at one end and to a spring at the other end. The spring provides a force to drive the piston and the plunger. An actuator is coupled to the lockout bar with which a button is configured to interface. The actuator moves the lockout bar when the substance reaches a temperature, thereby allowing the button to be activated so that the spring provides the force to drive the plunger. An incorporated stop whose measurements may vary allow the expelled dosage to vary accordingly.

Abstract: A syringe assembly having passive disabling structure includes a barrel and a plunger rod assembly. The plunger rod assembly includes a plunger rod and a stopper connected by an indexing locking element. The number of strokes of the syringe plunger before the stopper is locked into the barrel rendering the syringe assembly unusable is determined by the number of detents on the plunger rod and stopper which engage the locking mechanism. Upon completion of the final delivery stroke, any attempt to withdraw the plunger rod from the barrel will cause the locking element to engage the barrel and trap the stopper in the barrel preventing further use of the syringe.

Abstract: A plunger rod adapted for attachment with a stopper for use with a syringe barrel is disclosed. The plunger rod includes an elongated member having a front end and a back end, the plunger rod extending along a longitudinal axis. The plunger rod includes at least one deflecting arm associated with the front end of the elongated member. The deflecting arm is capable of deflecting radially inward during insertion of the plunger rod into a stopper, and deflecting outward into contact with an inner surface of the stopper after insertion to lock the plunger rod within the stopper.

Abstract: A stopper adapted for attachment with a plunger rod for use within a syringe barrel is disclosed. The stopper includes a main body defining an open rearward end and a closed front end. The open rearward end is adapted to receive a front forward end attachment portion of the plunger rod. The stopper also includes a core member integrally formed with said main body adjacent the closed front end. The core member includes a nose portion having a profile adapted to create a positive seal with an outlet opening of such syringe barrel.

Abstract: The present invention relates to a syringe system that allows rapid conversion between a needle/syringe system and a needleless/syringe system and in doing so allows an operator to move seamlessly between both systems, while minimizing needle stick risk. In this way, an operator may rapidly access medication bottles requiring a needle puncture and access needleless tubing systems requiring a needleless interface.

Abstract: A disposable syringe includes a barrel, a needle assembly, a plunger, and a spacer. A tubular catch extends rearwardly of the barrel to terminate at a peripheral edge. The needle assembly includes a needle cannula and a needle seat for securing the needle cannula. The plunger is movable in the barrel to a retraction initiating position, where a front open plunger end is coupled with the needle seat for withdrawal of the needle seat and the needle cannula into the plunger. An endcap is disposed to cover a rear open plunger end, and has a ring wall fittable in the catch. The spacer has front and rear abutment surfaces that detachably and respectively abut against the peripheral edge and a rim of the ring wall in a pre-use position to thereby prevent movement of the plunger to the retraction initiating position.

Abstract: A disposable syringe includes a barrel, a needle assembly, a plunger, a press-fitting unit, and a spacer. The plunger is movable in the barrel to a retraction initiating position, where a front open plunger end is coupled with the needle assembly for withdrawal of the needle assembly into the plunger. An endcap is disposed to cover a rear open plunger end of the plunger. The press-fitting unit is disposed between the plunger and an inner barrel surface of the barrel to permit press-fit engagement between the plunger and the barrel immediately after the plunger is moved to the retraction initiating position. The spacer includes front and rear abutment surfaces detachably engaged with the barrel and the endcap in a preuse position.

Abstract: The present invention relates to a method of assembling a syringe device such that rotational and translational tolerances are reduced or eliminated. The syringe device comprises a rotational retaining mechanism arranged to prevent backwards movement of a piston rod. The method comprises the step rotating the rotational retaining mechanism into a locking position prior to completing the assembly. Furthermore, the invention relates to a syringe device comprising a retaining mechanism having a first part and a second part, said parts being interconnected by a plurality of elements, wherein one of said elements comprises a first part and a second part separated by an interconnecting seam.

Abstract: A syringe having a syringe body, a plunger, means to prevent the rear of the plunger from being gripped to retract the plunger when the plunger is at least at the fully forward position where all or most of the liquid has been ejected, and a catch on the plunger which prevents retraction of the plunger when the plunger is in at least the fully forward position.

Abstract: An injection device includes a barrel, a plunger having a portion structured and arranged to move within the barrel, a needle support, and a locking arrangement. The locking arrangement may at least one of selectively lock a proximal end portion of the plunger to the needle support and automatically lock a proximal end portion of the plunger to an outer portion of the needle support. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Abstract: A syringe is provided which comprises a barrel (11) and a needle sheath (30) slidably located within the barrel, a plunger (20) with a plunger seal (23), a needle, a needle sheath (30) and a sheath seal (50), arranged so that depression of the plunger forces the needle sheath to move into a position where it covers or at least partly encloses the needle after delivery of fluid contents of the syringe. The needle sheath may be manually actuated or may be actuated by decompression of a spring. The syringe may further comprise a plunger disabling means operable to impede, prevent or otherwise hinder withdrawal of the plunger during or following depression of the plunger. The syringe may be a pre-filled syringe or a syringe which is filled by a user.

Abstract: A retractable syringe (11) is disclosed wherein the needle (14) is located initially in a first storage position enclosed within the syringe body (12). In a second in-use position, the needle extends from the body of the syringe. To move needle from first to second position, the plunger (13) connects the needle boss (15) with the syringe body ens (16). The plunger is then disengaged from the needle boss enable the plunger to be withdrawn and thereby take in fluid into the syringe. Upon completion of injection the plunger engages with the needle boss enabling the plunger to be withdrawn, the needle remaining attached. Engaging the plunger to the needle boss requires the same amount of force as to perform the injection. Lateral forces act to engage the needle boss and the end of the plunger, for example by utilising a cam mechanism in the form of a finger lock device (26).

Abstract: The syringe is formed according to DIN ISO 11040 and has a syringe barrel (1) with a syringe head (1a) formed on one end and a grip plate (4) formed at the other open end. An elastomeric piston stopper (6) is insertable in this open end, which is movable back and forth and which has a cruciform-cross-sectioned piston rod (7) screwed into it. A stop element, which reduces the interior diameter of the syringe barrel, is provided at the open end of the syringe barrel to perform a back-stop function, i.e. to prevent unintended withdrawal of the piston stopper. For this purpose a plastic part (2) connected to the grip plate (4) is provided with snap catches (3), which snap onto the inner side of the syringe barrel (1). These snap-catches (3) prevent the piston rod (7) from being rotated out of the piston stopper and the piston stopper (6) from being withdrawn from the syringe barrel. At the same time the finger support is enlarged.

Abstract: A plunger rod assembly for use with a syringe barrel is provided and includes a plunger rod slidably disposable within the syringe barrel, wherein the plunger rod includes a hub extending distally from a distal end thereof and at least two tabs extending outwardly therefrom. The syringe further includes a plug configured for slidable disposition in the syringe barrel and configured for selective connection to the plunger rod via a bayonet-type engagement. The plug includes a base wall having at least two resilient fingers supported on a first side thereof, wherein each resilient finger is configured to snap-fit engage a respective tab of the plunger rod during connection of the plug to the plunger rod; and a plunger tip supported on a second side of the base wall, opposite the first side, and being configured to form a substantially fluid tight seal with an inner surface of the syringe barrel.

Abstract: Apparatus and methods of their use are described for engaging a pumping cartridge with a pump drive. In certain embodiments, the cartridge, comprising a cylinder and a movable piston assembly, is initially assembled or subsequently positioned so that the distance between the attachment point on the piston assembly for coupling to a drive assembly, and a reference point on the cylinder, is greater than the maximal distance that will be encountered during normal oscillation of the piston during use. The cartridge, in certain embodiments may be pressed into a drive assembly having means for immobilizing the cartridge and means for coupling the piston assembly to the driveshaft. In certain embodiments, when the cartridge is fully inserted into the drive assembly, the piston is pressed into the cylinder sufficiently to establish a selected distance so that the piston shaft is in the proper position to engage with a coupling mechanism carried on the driveshaft.

Abstract: A single use syringe assembly is provided as well as a locking element for such an assembly. The single use syringe assembly includes a barrel, a plunger rod assembly and a locking element positioned within the barrel. The locking element includes one or more barbs for engaging the inside surface of the barrel. The barbs prevent the locking element from moving proximally within the barrel, but allow its distal movement therein with the plunger rod assembly. A spring member may be provided for urging the barbs towards the inside surface of the barrel. The barbs are preferably positioned on the edge portions of opposing legs that form part of the locking element.

Abstract: A disposable needleless injection device includes an integral unit that is dimensioned and arranged to be grasped in the hand of a user. The system is spring-loaded and is manufactured and shipped with the spring in a pre-cocked condition. An integral ampule is fillable by manipulation of a thrust rod/shaft which extends longitudinally through the device and is able to be grasped by a user. Once the unit is filled with a selected medication, it is held proximate the skin in order to inject the selected dosage. The unit is constructed from a maximum of eight component parts and is assembled in a matter of moments by unskilled personnel.

Abstract: The syringe is formed according to DIN ISO 11040 and has a syringe barrel (1) with a syringe head (1a) formed on one end and a grip plate (4) formed at the other open end. An elastomeric piston stopper (6) is insertable in this open end, which is movable back and forth and which has a cruciform-cross-sectioned piston rod (7) screwed into it. A stop element, which reduces the interior diameter of the syringe barrel, is provided at the open end of the syringe barrel to perform a back-stop function, i.e. to prevent unintended withdrawal of the piston stopper. For this purpose a plastic part (2) connected to the grip plate (4) is provided with snap catches (3), which snap onto the inner side of the syringe barrel (1). These snap-catches (3) prevent the piston rod (7) from being rotated out of the piston stopper and the piston stopper (6) from being withdrawn from the syringe barrel. At the same time the finger support is enlarged.

Abstract: A drug delivery device having a base member defining a skin-contacting surface, a syringe serving as a reservoir for the drug, and means for expelling drug from the syringe. The syringe is connected to the base member such that the longitudinal axis of the syringe is substantially parallel to the skin surface. A delivery needle is in communication with the syringe. The needle has an angled bend which directs the tip of the needle substantially perpendicular to the skin-contacting surface. In use, the tip of the needle is adapted to penetrate the skin of the subject.

Abstract: In a syringe, in which a needle assembly is engaged by a plunger and withdrawn into a syringe barrel for safe disposal, the plunger slides in a resilient insert secured at the proximal end of the barrel. The insert engages an annular ridge near the distal end of the plunger when the plunger, with the needle assembly attached to it, is fully withdrawn, thereby securely locking the plunger to the barrel, and reliably preventing distal movement of the plunger after the needle assembly is withdrawn into the interior of the barrel. The part of the plunger that protrudes proximally from the barrel may then be snapped off.

Abstract: A safety syringe has a hollow barrel, a plunger, a tube, a needle hub, a spring and a plug. The hollow barrel has an outside surface, a proximal open end and a distal closed end. The plunger is mounted slidably inside the hollow barrel. The tube has a proximal open end and a distal open end and is attached longitudinally to the outside surface of the hollow barrel. The needle hub and the spring are mounted inside the tube, and the needle can extend out of the distal open end of the tube. A first through hole defined in the hollow barrel and a second through hole is defined in the tube align with each other. The needle is extended out from the distal end of the tube to take a blood sample. The used needle is retracted into the tube after use to keep people from getting injured or infected.

Abstract: An improved pump, reservoir and reservoir piston are provided for controlled delivery of fluids. A motor is operably coupled to a drive member, such as a drive screw, which is adapted to advance a plunger slide in response to operation of the motor. The plunger slide is removably coupled to the piston. The piston comprises a first member and a second member. The first member has an external proximate side and an external distal side. The external proximate side is adapted to contact the fluid and is made of a material having a first stiffness. The second member has a first side and a second side and is at least partially disposed within the first member. The first side of the second member is adjacent to the external proximate side of the first member and is made of a material having a stiffness which is greater than the first stiffness.

Abstract: A hypodermic syringe includes a barrel, the barrel having two stop portions in the rear side, a radially compressible constraint member mounted in the barrel and stopped between the stop portions of the barrel, and a plunger holding a rubber stopper and axially movably inserted through the constraint member into the inside of the barrel, the plunger having a breaking portion, and a front stop flange, which is stopped against the constraint member upon back stroke of the plunger after the service of the syringe for enabling the user to break the breaking portion.

Abstract: The invention refers to a syringe of single-use type intended for injection or lab tests with an injection needle slidable into the syringe after usage. The intention with this is to eliminate the risk for prick injuries when the syringe is handled after usage. A design of a single-use syringe such that the needle becomes kept in the interior of the syringe after usage has proved to be involved by different kinds of complications and has made the syringe complicated and expensive to manufacture. An uncomplicated and reliable syringe of the kind stated in the introduction is achieved according to the invention by the fact that the plunger (2) of the syringe is provided with a coupling device (12) designed such that in the completely pushed in position of the plunger the rear part of the injection needle (6) is coupled to the plunger (2) and follows the plunger when the plunger is withdrawn.

Abstract: A needle-stick safety syringe includes an inner tubular body, plunger, and needle extending from a distal end of said inner tubular body, an outer tubular housing concentrically and slidingly surrounding at least a portion of the inner tubular body and biased apart from the inner tubular body. A recess is defined within an interior wall surface of the outer tubular housing, and a latch attached to a distal end of the inner tubular body. The latch includes a ring-shaped collar attached to the distal end of the inner tubular body and includes a cantilevered push-stop. A portion of the cantilevered push-stop is sized to fit within the recess when the latch is sufficiently disposed within the outer tubular housing.

Abstract: A syringe and adapter combination allowing the syringe to be filled with fluid by the employment of one hand of an operator.

Abstract: A syringe device incorporating ridges that cause resistive changes to the movement of the syringe gasket or plunger, thereby providing user feedback as to the position and speed of plunger movement. Such user feedback may be useful in stressful situations, under poor lighting conditions or in other unfavorable circumstances. Additionally, in certain embodiments these ridges may aid in accurate dispension or allow the syringe to derive additional functionality, such as performing as a vacuum source. Ridges can be protrusions such as tabs, bubbles or continuous rings for single or repeated use or these ridges may be formed as indentations. Ridges may be formed in patterns, in various sizes and shapes or these ridges may be mixed and matched as required or desired. Ridges may also be formed from a soluble material and the resistive change may itself provide indication that the material has been substantially dissolved and dispensed.

Abstract: A jig for injecting a fixed amount of insulin includes: a main fixture (1) having upper and lower sandwiching portions for sandwiching and supporting an insulin injector from both sides, at upper and lower portions on the rear surface of the insulin injector; a screw fixing piece (4) formed by extending one side of upper sandwiching portions 2 of the main fixture 1 upward; and, outside of the piece 4 for fixing an appointed quantity of screws, an injection button upper-limit position setting piece (6) whose upper portion is bent inward and which is provided with a slit (7) opened at its lower part, and the injection-button upper-limit position setting piece (6) is made freely movable up and down by screw fixation to the screw fixing piece (4) by inserting screws (8) through the slit (7).

Abstract: A one-handed hypodermic syringe is a renovated structure that allows users to push and pull the syringe by one hand. The medical personnel may place their thumbs inside the ring disposed in the distal end of the plunger and may press the concave objects disposed in the distal end of the barrel by their index fingers and middle fingers. Thus, the syringe may be held steadily, and the pull-push action of the injection manipulated with one band. The convenience for the medical personnel's use of hypodermic syringe is thereby enhanced.

Abstract: A syringe for use with an infusion pump, the infusion pump having a cavity for receiving the syringe. The syringe includes a syringe body, a plunger and an end cap. The syringe body has a tube that is open at a first end and transitions to a passage at a second end and a connector extending from the passage, the connector for attachment to an infusion set or tubing. The plunger is slidably mounted inside the tube and comprises a plunger tip and a plunger rod. The plunger tip has a front face that is complementarily received by the second end of the tube and a rear face, the plunger tip forming an interference fit with the tube. The plunger rod has a first end attached to the plunger tip and a second end extending outside the first end of the tube. The plunger rod has a cross-sectional shape that is complementarily received by the cavity of the infusion pump when inserted in only one direction.

Abstract: A plunger anti-detachment mechanism incorporates with a syringe which includes a hollow barrel, a hollow needle held at one end of the hollow barrel, and a plunger adapted to coaxially travel through the barrel. The plunger anti-detachment mechanism includes at least a locking stopper radially extended on the barrel and at least a resilient arm, having a locking latch outwardly extended therefrom, radially extended from the plunger wherein the resilient arm is adapted to move from an unlocked position to a locked position. At the unlocked position, the locking latch is moved away from the locking stopper such that the plunger is capable of freely traveling through the barrel, and that at the locked position, the locking latch is extended to the locking stopper so as to block up an axial movement of the plunger with respect to the barrel and interlock the plunger with the barrel.

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: The present invention is an improved needle-less injector device for the injection of fluids into the patients body. The injector device consists of a chassis, a nozzle on one end, a section for carpules containing the fluids to be injected, a piston, a spring-element acting on the piston, a compressing-mechanism for the spring-element and a release-mechanism. The compressing-mechanism can be connected to a coupling device of a standard dental driving unit.

Abstract: A piston stopper for a medicine injector, wherein the stopper has a stopper body with a mesh section and at least one sealing element positioned at least partly around the circumference of the stopper body, wherein at least one of the sealing element and mesh section is connected to the stopper body in a material bond. A method for manufacturing such a piston stopper is encompassed.

Abstract: A plunger anti-detachment mechanism incorporates with a syringe which includes a hollow barrel, a hollow needle held at one end of the hollow barrel, and a plunger adapted to coaxially travel through the barrel. The plunger anti-detachment mechanism includes at least a locking stopper radially extended on the barrel and at least a resilient arm, having a locking latch outwardly extended therefrom, radially extended from the plunger wherein the resilient arm is adapted to move from an unlocked position to a locked position. At the unlocked position, the locking latch is moved away from the locking stopper such that the plunger is capable of freely traveling through the barrel, and that at the locked position, the locking latch is extended to the locking stopper so as to block up an axial movement of the plunger with respect to the barrel and interlock the plunger with the barrel.

Abstract: A structural safety design for the prevention of mis-pressing plunger rod into syringe mainly designs for single-used syringes, of which set a locking socket and a safety locking tab at the plunger rod end. An obstruction is formed between the plunger rod and the flange of hollow fluid chamber before the safety locking tab is pressed into the locking socket, so that the plunger rod can not be thoroughly pressed into the hollow cylinger. The invention, therefore, provides with a safety structure that effectively prevents from the unable-to-use problem of a syringe resulting from the plunger rod is mis-pressed into the hollow cylinder engaging with other components inside before the fresh syringe being used.

Abstract: A hypodermic syringe includes a housing (1), a plunger (2) with an associated piston (3), a needle carrier (4) with a needle (5) covered by a removable sheath (6). A vacuum is formed between the plunger (2) and piston (3). When the plunger (2) is operated, the piston (3) engages the needle carrier and a coupling between the plunger and piston is broken, so that the vacuum withdraws the piston (3) into the plunger (2), together with the needle carrier, so as to retract the needle into the housing (1). The needle carrier (4) is rectangular in cross-section and is received in a corresponding rectangular sectioned housing opening (1.2) in order to prevent rotation of the needle carrier relative to the housing. This facilitates removal of the needle sheath, without the risk of a needle stick injury prior to use of the syringe, and allows for the separate and external fitting of a needle.

Abstract: A pre-filled syringe includes an outer cylinder having a sealed nozzle, and an inner cylinder movable forward and rearward in the outer cylinder and forming a first space between the inner cylinder and an inner front end of the outer cylinder. A first gasket is slidably accommodated in the inner cylinder in a liquid-tight state, a second gasket is accommodated slidably in the inner cylinder in a liquid-tight state and is located rearward from the first gasket to form a second space between the first and second gaskets, and a plunger is attached at a rear end of the second gasket. A third gasket is installed near the front end of the inner cylinder to be slidable in a liquid-tight state between the inner and outer cylinders. A first medicine is stored in the first space and a second medicine is stored in the second space.

Abstract: A structure is disclosed for holding medical sharp instruments within covers. Contrary to the prior art, the medical sharp instruments are held within the cover, both during use and non-use positions. Most preferably, some locking structure is provided which locks the medical sharp instrument within the cover at both the use and non-use positions.

Abstract: A single-use syringe having a barrel and a plunger is provided. The plunger at least one vane, and the vane is provided with serrations or ratchet teeth. The serrations each have a vertical rear wall and a sloped top edge. A barbed clip is provided that fits on the serrated vane. The barbs on the clip engage the inner wall of the barrel. When the plunger is initially withdrawn, the barbs of the clip engage the inner wall of the barrel and the clip remains in position with respect to the barrel. Because the tops of the serrations are sloped, the ridged/serrated vane of the plunger passes easily under the clip. When the plunger is re-inserted into the barrel, the clip engages one of the vertical rear walls of the serrations and moves along with the plunger deeper into the barrel. If one attempts to re-retract the plunger, the distal wall of the plunger strikes the clip, and the clip is immobilized because the barbs engage the inner wall of the barrel.

Abstract: A safety syringe comprising a casing having a neck and a plunger having a distal portion, a weak portion, and a coupling portion covered by a hollow stopper having a membrane. The plunger is channeled in the casing and is moveable between an extended position and a compressed position. A needle holder, in the neck, contains a distally facing arrowhead and a proximally facing needle. Moving the plunger from an extended position to a compressed position, causes the arrowhead to puncture the membrane and engage the coupling portion. If the plunger is returned to the extended position, the needle is drawn into the casing and the distal portion of the plunger can be removed. If the plunger is re-compressed, the needle encounters a wall in the neck preventing the needle from exiting the casing. The syringe is easy to manufacture and prevents manufacturing burrs from being injected into patients.

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: A pre-filled syringe assembly is achieved which prevents, with a strong force, a stopper provided therein from being pulled out, and wherein the stopper can be prevented from being scratched.

Abstract: A medical device includes a hollow needle having a distal end and a proximal end, and a substantially flexible storage chamber for storing a medical preparation. The storage chamber is disposed spaced apart from the proximal end of the needle. The medical device further includes a needle shield, means operable to advance the storage chamber toward the proximal end of the needle and enabling fluid communication thereof with the medical preparation in the storage chamber, and means operable to decommission the needle substantially immediately using the needle shield after injecting the medical preparation with the needle.

Abstract: A retracting syringe of one use has a plunger comprising a handle portion and a needle retention portion forward of the handle portion. A positive locking structure in the syringe barrel ensures the syringe is not reused. In one embodiment, the positive locking structure is a stop in the syringe barrel. The handle portion separates after one use and is removed from the syringe. In a second embodiment, the handle portion has a plurality of stepped serrations and the positive locking structure is a clip which is movable with respect to both the handle portion and the barrel. In a third embodiment, the positive locking structure is a clip fixed in an enlarged back opening of the barrel with springing points which are protected from a plurality of stepped serrations on the handle portion by a sliding collar. This one use feature can be applied to a nonretracting syringe.

Abstract: The syringe includes an adapter threaded into the distal end of the barrel and a plunger axially movable within the barrel. A stop and catch cooperate between the adapter and barrel end to prevent rotation of the adapter. Adapter and plunger engagement structures are carried by the plunger and adapter, respectively, to enable joint rotation of the plunger and adapter relative to the barrel to unthread the adapter from the barrel end and withdraw the adapter and needle carried thereby jointly with the plunger into the interior of the barrel. The engagement structures also include an element for engaging the catch in response to axial movement of the plunger to release the adapter for rotational movement relative to the barrel end and subsequent withdrawal of the adapter and needle carried thereby into the barrel.

Abstract: A dual-chamber safety hypodermic syringe. The syringe includes a barrel having a medicine chamber, a needle chamber, and a guide hole connected between the chambers. The needle assembly is moved in and out of the needle chamber between the extended position where an inlet on a neck of the needle assembly is disposed in communication with the guide hole for enabling liquid medicine to be squeezed out from the medicine chamber through the needle cannula of the needle assembly, and the received position where the needle assembly is safely received inside the needle chamber and kept from sight.