Abstract: A hypodermic injection system utilizes disposable medicament ampules having self-contained needles operated by a re-useable actuator to extend the needle from complete enclosure within the ampule out and into the flesh and inject the medicament as it moves, the needle automatically retracting into the disposable ampule after exhausting its contents, completely eliminating any need to handle the exposed needle before or after use. The post-injection needle retraction operation is powered by the reuseable actuator, avoiding the expense of prior devices which incorporate the retraction mechanism in the disposable ampule. The invention is useful to health professionals and also of particular utility to diabetics and others who must regularly self-inject.

Abstract: The invention relates to an injection syringe for mixing and applying injection substances having a syringe cylinder and a plunger displaceable therein. The plunger has a stopper at its distal end tightly engaged against the inner surface of the cylinder to form an injection volume in the syringe cylinder. A mixing plunger is displaceable in longitudinal direction and guided through the plunger. The mixing plunger projects from the stopper at its proximal end and, at its distal end, has a mixing piston with at least one opening, passing through the surface of the piston. Injection substances can pass through the one opening when the mixing piston is displaced in the injection volume. An effective thorough mixing of the injection substances takes place through to-and-fro movement of the mixing piston in the injection volume.

Abstract: The invention relates to a syringe (1) which comprises a rod (5) mounted for reciprocating movement in relation to a container (8), wherein one end of the rod has the form of a needle (3) or is able to coact with a needle. The syringe further comprises a piston (4) and coupling member (6) which connect and disconnect the piston to and from the rod. The coupling member assumes a connecting state when the piston is drawn by the rod from a position proximate to the needle to a position in which it is distanced therefrom, and are brought to a disconnecting or disconnected state when the piston is pressed by the rod towards the needle. The coupling member comprises support and/or slide surfaces (5k', 5k) arranged on that part of the rod which is proximal to the needle, and opposing support and/or slide surfaces (4k', 4k) on the piston.

Abstract: The invention relates to a rod-and/or piston unit that can be enclosed in a container forming part of a non-reusable syringe where the rod and the piston have means for connecting the piston to the rod and disconnecting the piston therefrom. The piston and the rod are manufactured as one piece in a die or similar. The invention also relates to a method for assembling a syringe.

Abstract: A soft tissue closure system for closing percutaneous puncture sites or soft tissue voids, its method of manufacture and method of use are disclosed. The system comprises a delivery means and a self-expandable, resorbable implant disposed within the delivery means in a compressed configuration. Upon release of the implant member from the system within a soft tissue void, the implant member self-expands to conform to the shape of the soft tissue void and seals the void.

Abstract: Device for rendering a syringe unusable after a first injection, wherein the plunger head is disconnected from the body of the plunger, and the plunger head is left permanently in the body of the syringe.

Abstract: A disposable syringe for administering liquid medicinal agents to live animal or human subjects is disclosed. The syringe comprises a hollow cylinder, filled with a medicinal agent, with which an injection needle is attached. The cylinder surrounds a piston that can be moved by means of a piston rod towards the injection needle. The piston is produced from a thermoplastically processable rubber mixture and is delimited in the direction of the medicinal agent by a peripheral sealing lip that contacts the hollow cylinder and that can be deflected in the radial direction.

Abstract: A syringe tubular body forms a fluid receiving chamber having a restricted opening at one end for receiving a hollow needle and a wider opening at the other end for receiving a tubular plunger. The plunger has resilient fingers at its distal end which is inserted into the body chamber and an annular groove in one embodiment adjacent the proximal end. The fingers have inwardly extending hook-like projections. A piston assembly includes a body with an annular groove which releasably receives the projections for securing the piston assembly to the plunger during injection, the piston assembly including an elastomeric disc piston sealingly engaged with the tubular body chamber sides. A sleeve is external and movable along the body and is next adjacent the disc. The sleeve has an annular groove which is selectively engaged by the projections. The sleeve has an axial extent greater than that of the piston assembly body groove.

Abstract: A hand-held dispenser for delivering small, precisely controllable amounts of fluid or semi-fluid adhesives includes an elongated container having a hollow cylindrical barrel section terminated at the rear end thereof by a pair of diametrically opposed flange wings protruding radially outwards from opposite sides of the barrel, a reduced diameter front tubular outlet section extending forward from the barrel, and a flexible capillary delivery tube protruding outwards from the outlet section. A piston longitudinally slidably located within the bore of the barrel displaces adhesive within the bore forward of the piston by the turning of a lead screw which contacts the rear wall of the piston and which is threadably held within a support member attached to the rear portion of the barrel section.

Abstract: A disposable safety syringe has a needle shuttle slidably located within a main syringe barrel. The shuttle has a pair of outwardly extending guide tabs which engage a guide slot formed in the barrel wall. The upper end of the needle shuttle is configured to accept a Wyeth needle cartridge having a needle attached to an ampoule by a carrier. A bushing and rod assembly are mounted in the barrel below the ampoule. After use, the needle shuttle is maneuvered downwardly by the guide tabs to a locking position in which the needle attached to the ampoule is housed within the barrel for safe disposal.

Abstract: The invention relates to a disposable syringe which comprises a rod (5) that can be moved reciprocatingly in relation to a container (2). One end of the rod has the form of a needle (3), or can coact with a needle (3). The syringe also includes a piston (4) which coacts with the rod and which has means (6) for connecting the piston to the rod and disconnecting the piston therefrom. The rod (5) has an angled cross section and is provided with support and/or slide surfaces which coact with support and/or slide surfaces positioned peripherally on the piston (4).

Abstract: Disclosed are pre-filled syringes equipped with an improved plunger having a plunge insert and a plunger rod, characterized by a leak-proof seal and easy sliding property.

Abstract: Disclosed are pre-filled syringes equipped with an improved plunger, a plunger actuating cylinder and a plunger rod, characterized by a leak-proof seal and easy sliding property.

Abstract: Disclosed are pre-filled syringes equipped with an improved plunger and a plunger rod, characterized by a leak-proof seal and easy sliding property.

Abstract: This invention relates to a safety dental syringe which before and after use protects the needle from exposure. More particularly, this invention pertains to a safety sleeve for a conventional dental syringe wherein after the syringe is used, an overlying sleeve surrounding the barrel of the syringe is extended so that the exposed used needle of the syringe is shielded by the sleeve. The invention pertains to a needle and sleeve assembly useful for use in association with a dental syringe comprising a hollow barrel, a piston, and an anaesthetic ampule cavity therein, comprising: a hollow elongated sleeve having openings at each end thereof; and a hollow housing base which supports at one end thereof an injection needle, and at the other end thereof, an ampule penetrating needle, the exterior of the housing base being adapted to slidably engage with the hollow interior of the sleeve.

Abstract: A safety assembly for an injection syringe, which syringe consists of a liquid container arranged or to be arranged within a casing (10) and having a piston (17) shiftable therein, a piston rod unit (1) provided with an external actuating element (3) and coupled or to be coupled with the piston, a needle foot (20) latched or to be latched at the other end of the casing with a hollow needle (27) communicating or to be communicated with the interior of the liquid container, said piston rod unit being provided with means (13) for unlatching the needle foot and to couple it with the piston rod unit, in order to allow to retract said foot together with the needle into the casing. According to the invention the piston rod unit comprises two parts (3, 5) which are mutually movable in the axial direction, one part being formed by the piston rod (1) or being connected thereto, and the other one comprising an unlatching element (8, 13, 22).

Abstract: An aspirating non-reuseable syringe is provided which includes a plunger. The main components of the plunger include a piston and a cylindrical plunger stem. The piston is removably connected to the cylindrical plunger stem by first, second, and third connecting members. The connecting members utilize a nipple mating with one aperture and sliding within another aperture to effect aspiration as well as disconnection of the piston from the plunger stem after a single use of the syringe.

Abstract: A readily assembleable, snap together hypodermic syringe holder for use in combination with disposable medicament-containing ampoules is adapted to immobilize an ampoule within the syringe holder and provide manual aspirating capability.

Abstract: An apparatus 10 for driving a plunger 134 of a syringe 16 includes a plate 48 on the top 38 of a frame 36 and a structure 62 on the plate 48 for releasably attaching the cylinder 130 of the syringe 16 to the frame 36 and securing the cylinder 130 against lengthwise movement relative to the frame 36. A lever 76 is pivotably attached to the top 38 of the frame 36 a selected distance from the plate 48. A pair of pivot pins 108,110 releasably pivotably attach the distal end 150 of the plunger 134 of the syringe 16 to the lever 76. In this manner, pivotable movement of the lever 76 is translated into lengthwise movement of the plunger 134. An apparatus 10 for transferring a measured amount of fluid from a first fluid supply 14 to a fluid reservoir 170 includes a syringe 16, the syringe driving apparatus 12 and a two-way check valve 18. The fluid supply 14, the fluid reservoir 70 and the syringe 16 are maintained in fluid communication through the two-way check valve 18.

Abstract: The strength and integrity of hydrophilic polyurethane resins prepared by reacting a diol component, an organic chain extender and an organic diisocyanate are improved by critical selection of the diol component, the amount of water in the reaction mixture and the mole ratios of the reactants. The diol component is at least one of (1) a long chain poly(oxyethylene) glycol of molecular weight above 2500 and (2) a medium chain poly(oxyethylene) glycol or polyester glycol of 250-2500 molecular weight. The chain extender is a difunctional compound having a molecular weight of less than 250. The amount of water in the reaction mixture is 0.5 to 2.5 weight % and the urea content of the resins is from about 13.6 to 33.7 weight %.

Abstract: A soft tissue closure system for closing a percutaneous puncture site or soft tissue voids, its method of manufacture and method of use are disclosed. The system comprises a delivery means and a self-expandable, resorbable implant disposed within the delivery means in a compressed configuration. Upon release of the implant member from the system within a soft tissue void, the implant member self-expands to conform to the shape of the soft tissue void and seals the void.

Abstract: A syringe has a piston member which slides in a piston bore. The piston member is driven into the bore using a plunger so as to discharge a substance in the syringe through a needle. The plunger is connected to the piston member by a one use connection which breaks when the syringe has been completely discharged or if an attempt is made to reuse the syringe. The plunger also provides a receptacle for receiving and containing the syringe needle when this has been detached from the syringe end, after use.

Abstract: A self-aspirating plunger for power injector cartridges characterized by its ability to pump head space gas and aspirate the power injector cartridge without the need to draw backward on the plunger toward the proximal end of the cartride comprising:a female ring component;a male component having a stem and a cone-shaped portion, said stem slideably fitting into said female ring component; andan elastomeric diaphragm shell covering said female ring component and said cone shaped head portion of said male component.

Abstract: An injection syringe useful in the medical arts for injecting high viscosity fluids or pastes, particularly in endoscopic applications. The syringe includes a force multiplying mechanism to infuse viscous medicaments such as collagen or polytetrafluoroethylene paste, with a controlled metering action. The force multiplying mechanism is provided by the combination of lower piston cylinder chamber that intersects with an upper cylinder chamber, wherein the piston is connected to a piston advancing means on a lever pivot arm.

Abstract: A single use disposable syringe having a piston axially slidable in a barrel for undergoing a retraction movement to fill the barrel with fluid and a forward movement to discharge the fluid from the barrel. An operating rod projects from the barrel for operating the piston and the rod is operatively connected to the piston with capability of relative axial movement therebetween to approach the piston during its forward movement. A flexible finger has one end connected to the piston or rod and a cutting element is provided on the flexible finger in spaced relation from the connected end thereof and facing the barrel. During retraction movement of the piston, the cutting element is retracted from the barrel whereas during forward travel of the piston and approach of the operating rod towards the piston, a deviation member displaces the flexible finger outwardly to produce cutting of the barrel by the cutting element to render the barrel subsequently unusable.

Abstract: A liquid dispensing syringe having a plunger unit that is non-retractable after liquid is dispensed. The syringe is only refillable by persons having special filling equipment.

Abstract: A medical syringe having a disposable capsule, or capsule, containing the needle and the injection fluid, the syringe including a barrel assembly having a thumb ring attached to a plunger by a plurality of connecting rods, the plunger working like a piston inside a barrel having finger grips to cooperate with the thumb ring and a central locking rod to connect to a disposable shielded needle capsule, the capsule including a space for holding the supply of injection fluid and a movable piston at the top of that space for contact with the plunger, and a central tubular guide as a sheath for a hollow needle having a needle plug which is attachable to the locking rod and two spaced gaskets around the needle and positioned on each side of a passageway through the wall to be in alignment with a passageway through the tubular guide to allow the fluid to flow into the hollow of the needle.

Abstract: A single-use syringe has a piston assembly sealingly slidable within a bal. The piston assembly has a plunger (1) with a divergently tapered portion (4) and a resiliently deformable piston (2) with a through aperture (7), correspondingly tapered so that part of the tapered portion (4) may fit within the aperture, and a tapered skirt portion (6) adapted to surround a further part of the tapered portion (4). The through aperture is adapted to be plugged by the plunger. A locking ring (3) having a tapered aperture to surround said skirt portion is provided to hold the skirt (6) against the plunger end portion (4). When the plunger (1) is depressed within the barrel, the locking ring (3) is delayed by the wall of the barrel while the skirt (6) is pushed inwardly. Once the skirt (6) is unrestrained by the locking ring (3), outward movement of the plunger (1) will cause its end portion (4) to be pulled free from the piston (2 ). The piston (2) is thus non-retractable to prevent a second drawing-in of liquid.

Abstract: A non-reuseable syringe is provided which includes a plunger. The main components of the plunger include a piston and a hollow cylindrical plunger stem. The piston is removably connected to the hollow cylindrical plunger stem by first and second connecting members. The connecting members utilize a nipple mating with an aperture to effect disconnection of the piston from the plunger stem after a single use of the syringe.

Abstract: A self-destructing disposable safety syringe system, suitable for preventing needle sticks, preventing syringe reuse, and dispensing fluids from, drawing fluids into and mixing fluids within the system.

Abstract: A hypodermic syringe comprises a barrel, a plunger slidably received in the barrel, a drive shaft slidable in the barrel, and a connector for drivably connecting the drive shaft to the plunger. The connector has a plunger end including a first pair of resilient fingers insertable into the plunger, a drive shaft end having second pair of fingers insertable into the drive shaft, and an intermediate portion intermediate the plunger and drive shaft ends. The first pair of fingers has projections which engage apertures in the plunger. The second pair of fingers engages an annular rib in the drive shaft. When the drive shaft is fully inserted into the barrel to bottom the plunger, the drive shaft slides over the first pair of fingers, causing the fingers to retract and the projections to disengage from the apertures in the plunger. The connector remains engaged with the drive shaft, and separates from the plunger the drive shaft is withdrawn from the barrel, thereby preventing further use of the syringe.

Abstract: A syringe in which a piston is releasably latched to a plunger for reciprocation in a cylindrical barrel, wherby the piston will become disengaged from the plunger upon one cycle of rearward and then forward movement of the plunger and piston in the barrel, followed by subsequent rearward movement of the plunger in the barrel, thus rendering the syringe incapable of reuse. The piston is held to the plunger by latching arms which move to an over-center position between their latched and unlatched positions.

Abstract: A medical liquid injector for continuous transfusion includes a syringe fitted with a piston having a detachable shaft rod, and a cap that can be connected to a proximal end portion of the syringe. The cap has an elastic pressing device for continuously pressing the piston from which the shaft rod is removed to a position where all the amount of medical liquid is pushed out after the medical liquid has been sucked into the syringe.

Abstract: Inside a syringe (1) slides a plunger (2) which bears a joint (4) sliding sealingly over the internal wall of the syringe. The flexible membrane (6) of the joint (4) fixed to the end of the plunger (2) bears a closing component (25, 27) which follows the movement of deformation or displacement of the membrane through the effect of the pressure built up during the injection stage, but which is retained by immobilizing strips (17) in a position in which it opens the orifice, breaking the seal between the top and the bottom of the joint, as soon as the membrane returns to its initial position.

Abstract: Syringe of the type comprising a hollow cylindrical body 11 having a bottom closing part 14 bearing a connecting joint for a needle and in which there is arranged in a sliding manner a piston 12 driven by a stem 17 and fitted with a sleeve 13 sliding on the outside of said body 11. Said sleeve 13 is provided with first engagement means 26 designed to engage with said body 11 and prevent movement in one direction and second engagement means 25 designed to engage with the drive stem 17 of said piston 12 to similarly prevent movement in the other direction.

Abstract: A self-discarding syringe has a tube having a spout at an end thereof, and a piston including two elements movable relative to each other. One of the two elements is rigid and another of the two elements is resilient. The tube has a limitation for limiting displacement of the piston means away from the spout.

Abstract: An adapter is provided for enabling the single-handed use of a syringe for aspiration. An assembly including such an adapter is also provided. The adapter includes an elongate body portion including a first end portion which functions as a thumb pad and a second end portion secured to the syringe barrel. A winged member is secured to the syringe plunger and includes a pair of flanges extending outside the adapter. The syringe plunger may be retracted using only one hand by pulling the flanges of the winged member with the index and middle fingers while maintaining the thumb upon the first end portion of the adapter.

Abstract: A disposable syringe for injections comprises a cylindrical housing (1), which accommodates a piston (5) with a rod (6), and a needle fixing device (4). The piston (5) and the rod (6) are mechanically disengaged from each other, a flange (7) is provided at the end of the rod (6), and a washer (8) is fitted on the rod (6) coaxially therewith. The diameter of the hole in the washer (8) is smaller than the diameter of the flange (7), while the outside diameter of the washer (8) exceeds the inside diameter of the housing (1) by such an amount that the force of friction between the outer surface of the washer (8) and the inner surface of the housing (1) surpasses the force exerted upon the washer (8) as a result of motion performed by the housing (1), including as accelerated motion thereof. The disposable syringe is equally applicable in any medical institution and for individual use.

Abstract: The strength and integrity of hydrophilic polyurethane resins prepared by reacting a diol component, an organic chain extender and an organic diisocyanate are improved by critical selection of the diol component, the amount of water in the reaction mixture and the mole rations of the reactants. The diol component is at least one of (1) a long chain poly(oxyethylene) glycol of molecular weight above 2500 and (2) a medium chain poly(oxyethylene) glycol or polyester glycol of 250-2500 molecular weight. The chain extender is a difunctional compound having a molecular weight of less than 250. The amount of water in the reaction mixture is 0.5 to 2.5 weight % and the urea content of the resins is from about 13.6 to 33.7 weight %.

Abstract: A reusable dental syringe including a conventional medication filled carpule and a conventional double-ended needle cannula which is to be retracted into a compact enclosure to permit the safe handling and disposal of the cannula while avoiding an accidental needle stick and the possible spread of disease. The carpule is inserted into a hollow carpule adapter to engage a movable needle carrier at the distal end of the adapter. The combination carpule and adapter are loaded into the cylinder of the syringe, and the needle cannula is attached to the needle carrier to penetrate the carpule. At the conclusion of an injection, the combination carpule and carpule adapter are rotated outwardly from the syringe cylinder, and the carpule is then pulled rearwardly through the adapter, whereby to correspondingly relocate and anchor the movable needle carrier at the proximal end of the adapter.

Abstract: A single use syringe in the form of a cylindrical barrel with a first end attached to a hypodermic needle. A plunger and piston in the barrel draw liquid into the syringe through the hypodermic needle and eject the liquid through the hypodermic needle. The plunger includes a detent formed at an intermediate location. An insert at the second end of the barrel includes at least one cantilevered, longitudinally extending resilient arm with a follower at a free end thereof that rides over the plunger. When the plunger is pushed to a final position, the follower drops into the plunger detent to block any further longitudinal motion of the plunger and piston preventing any subsequent use.

Abstract: A disposable syringe for injections has a cylindrical housing (1), which accommodates a piston (2) with a rod (3) and a needle fixing device. The piston (2) and the rod (3) are mechanically disengaged from each other and the rod (3) has an annular two-stepped slot (5), wherein provision is made for a lower-depth portion (6) and a higher-depth portion (7). A sealing cup (8) made of an elastic material is interference-fitted in the portion (6) of the slot (5), the width of the cup (8) being in excess of the clearance (b) between the bottom of the slot (5) in the portion (6) thereof and the inner surface of the housing (1).

Abstract: A syringe comprising means making it possible to make the plunger integral with the end of the plunger stem during the first filling, and to cause the disconnection between these element during a refilling attempt.

Abstract: A single-use, hypodermic syringe which disables itself during its initial application thereby preventing any subsequent use of the syringe. The working parts of the invention are designed to separate automatically when the syringe is oriented into the solution dispensing mode. These separated parts prevent subsequent aspiration of solutions into the syringe thereby rendering the syringe inoperable and unuseable after its initial use.

Abstract: A single-use syringe has a piston assembly having a plunger (1) with a divergently tapered end portion (4). A resiliently deformable piston (2), with a blind aperture (7) correspondingly tapered so that part of the plunger end portion (4) may fit within, also has a tapered skirt portion (6) adapted to surround a further part of the end portion (4). A locking ring (3) having a tapered aperture to surround said skirt portion is provided to hold the skirt (6) against the plunger end portion (4). When the plunger (1) is depressed within a barrel, the locking ring (3) is delayed by the wall of the barrel while the skirt (6) is pushed inwardly. Once the skirt (6) is unrestrained by the locking ring (3), outward movement of the plunger (1) will cause its end portion (4) to be pulled free from the piston (2). The piston (2) is thus non-retractible to prevent a second drawing in of liquid.

Abstract: A non-reusable syringe is made up of a hollow barrel with a hypodermic needle in communication with one end of the barrel, and a plunger assembly including a plunger movable in tight-fitting engagement through the interior of the barrel and a plunger shaft which extends axially away from the plunger and is releasably connected to one end of the plunger in such a way that relative rotation of the shaft with respect to the plunger in one direction will cause separation of the shaft from the plunger but reverse rotation will maintain the shaft and plunger in connected relation. A nut or keeper is positioned at the opposite end of the barrel to impart rotation to the shaft in response to axial movement of the shaft through the barrel.

Abstract: A combination is disclosed of a handle and a member that is either a phlebotomy device or a drug-injecting syringe. The handle removably attaches by a mating pivot pin and aperture disposed relative to the axis of the handle and the member to ensure that the unlatched configuration is geometrically different from the latched configuration. Latching is achieved by a hook member on one that engages a recessed groove on the other, simply by pivoting the handle until its axis coincides with the axis of the member.

Abstract: A single-use syringe which may be constructed for use by drug abusers comprises a barrel (2) and a plunger (13) slidably mounted in the barrel (2) with the plunger stopper (14) sealingly engaging with the inner wall of the barrel (2). Projections (10) extend from the inner wall of the barrel (2) and are located at such a distance from the distal end of the barrel (2) to permit flushing movements of the stopper (14). A breakable joint (20) integrally joins the stopper (14) and the plunger rod (15), and is broken by engagement of the stopper (14) with the projections (10), so that the stopper is retained in the end of the barrel and the syringe is rendered unfit for further use. In one embodiment, the joint is resilient such that the joint moves readily past the projections during full advance of the plunger to inject a drug, but engages the projections thereby breaking the joint, during subsequent withdrawal of the plunger.

Abstract: The invention relates to a syringe (1) comprising a container (2), a needle (3) capable of co-acting with one end of the container, a plunger (4) which is arranged in the container and which sealingly co-acts with the inner surface (2c) thereof, and a rod-shaped element (5) which co-acts with the plunger (4) and which is arranged for reciprocating movement relative to the container (2), such that movement of the element from the one end (2a) in a first direction (P1) enables the container (2) to be filled with injection liquid, while linear movement in the opposite direction (P2) causes liquid in the container to be discharged therefrom through the needle (3).

Abstract: A plunger having a generally converging distal portion, and a rear face on which is provided a coupling structure. The coupling structure is transversely engageable by, and transversely disengageable from, a driving mechanism of a power-driven angiographic syringe, and, one engaged, cannot be disengaged by rotation of the driving mechanism relative to the plunger in the absence of translational movement of the driving mechanism and plunger relative to one another. The coupling structure may include a rearwardly extending wall to which is joined a radially inwardly extending flange. The coupling structure may be generally C-shaped, with a continuously curved portion having an arc length not exceeding about 180.degree., and optionally may have tangentially extending end segments respectively joined to the continuously curved portions.