CH669910A5 - Syringe with two series of stops on piston - engageable by rotation with slot in cover to allow motion in one direction only - Google Patents

Syringe with two series of stops on piston - engageable by rotation with slot in cover to allow motion in one direction only Download PDF

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Publication number
CH669910A5
CH669910A5 CH254488A CH254488A CH669910A5 CH 669910 A5 CH669910 A5 CH 669910A5 CH 254488 A CH254488 A CH 254488A CH 254488 A CH254488 A CH 254488A CH 669910 A5 CH669910 A5 CH 669910A5
Authority
CH
Switzerland
Prior art keywords
piston
locking
syringe
edges
handle
Prior art date
Application number
CH254488A
Other languages
French (fr)
Inventor
Michel-Elie Ritzi
Original Assignee
Michel Elie Ritzi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Michel Elie Ritzi filed Critical Michel Elie Ritzi
Priority to CH254488A priority Critical patent/CH669910A5/en
Publication of CH669910A5 publication Critical patent/CH669910A5/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/5013Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • A61M2005/3235Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user triggered by radial deflection of the anchoring parts between needle mount and syringe barrel or needle housing, e.g. spreading of needle mount retaining hooks having slanted surfaces by engagement with correspondingly shaped surfaces on the piston at the end of an injection stroke
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/5013Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
    • A61M5/502Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston
    • A61M2005/5026Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston allowing single filling of syringe

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Environmental & Geological Engineering (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A syringe has one cylinder sliding inside another, a cylindrical piston sliding on the inner cylinder, stops on the piston preventing motion in either direction, a tongue locking the piston against rotation, a cover to the outer cylinder with a slot freeing one series of stops when the piston is rotated to allow it to move in a chosen direction, a second slot in the cover receiving the tongue at the end of the piston's stroke to prevent further rotation, and recesses in the piston engaging lugs at the end of its stroke to prevent its withdrawal. ADVANTAGE - The syringe cannot be reused, and protects against accidental injury.

Description

       

  
 



   DESCRIPTION



   La présente invention concerne une seringue munie d'une aiguille autorétractable et d'un piston autobloquant à la traction en tin de course, ainsi que d'un manche de piston autobloquant à la poussée lors du remplissage de la seringue et autobloquant à la traction durant la vidange de la seringue, ainsi qu'un dispositif de blocage en rotation du manche du piston, empêchant toute nouvelle utilisation de la seringue après l'injection et diminuant considérablement le risque de piqûres accidentelles.



   Les seringues   utilisées    actuellement sont dangereuses par le risque de contamination qu'elles peuvent représenter en cas de piqûres accidentelles dans le milieu hospitalier, ou en cas de réutilisation ou de prêt dans le milieu des drogués, particulièrement dans la transmission de la séropositivité.



   En outre, le danger de la transmission de la   séroposîtivité    par piqûres accidentelles en dehors du milieu des drogués réside dans le fait que ces derniers abandonnent souvent leur seringue n'importe où après utilisation.



   Ainsi, ces seringues abandonnées représentent un danger potentiel particulièrement grave pour les enfants en bas âge qui les trouvent dans les jardins publics et qui les considèrent comme des jouets.



  De surcroît les seringues abandonnées dans les poubelles, les WC publics ou de restaurants sont également un danger pour les gens chargés de la voirie ou du nettoyage des lieux d'aisance.



   Le fait que l'aiguille soit automatiquement rétractable après l'injection diminue considérablement le risque de piqûre accidentelle, à moins de   casser    délibérément la seringue et en empêcher toute réutilisation. L'invention comme décrite à la revendication satisfait à ces buts et sera mieux comprise à la lecture d'un exemple en regard des dessins.



   La figure A représente la seringue de profil en vue générale.



   La figure B représente le poussoir, le manche de piston et le piston.



   Les figures C, D, E représentent des coupes à différents niveaux.



   La figure F représente une coupe du piston.



   La figure G représente une vue en plan du piston.



   La figure H représente un détail du dispositif de rétraction de l'aiguille.



   Lors de la traction du piston 8 pour le remplissage de la seringue, les arêtes antitraction 5 dirigées vers le poussoir 1 passent au travers de l'encoche 17 du passage des arêtes de blocage sur la couronne 21 du couvercle de verrouillage 6.



   Pendant ce temps, les arêtes antipoussée 3 dirigées vers le piston 8 peuvent, durant la traction, passer la couronne 21 du couvercle de verrouillage 6 par simple pression due à l'élasticité du matériau, mais ne peuvent repasser la couronne 21 en sens inverse après la détente du matériau de   l'arête,    étant retenus précisément par la couronne 21 du couvercle de verrouillage 6.



   Lorsque la seringue est préparée pour le remplissage, l'utilisateur peut en doser le contenu avec précision grâce aux espaces entre les arêtes   antîtraction    5 et les arêtes antipoussée 3. Lorsque la seringue est prête pour l'injection, l'utilisateur doit faire exécuter au poussoir 1 et manche de piston 2 une rotation latérale, de manière que les arêtes antipoussée 3 viennent se loger dans l'encoche des passages d'arêtes 17, tandis que, par ladite rotation, les arêtes antitraction 5 sont verrouillées par la couronne 21 du couvercle de verrouillage 6.



   Ainsi le piston 8 et le manche de piston 2 peuvent être poussés mais non retirés par le fait que les arêtes antipoussée 3 sont déverrouillées en passant dans l'encoche des passages d'arêtes 17, tandis que les arêtes antitraction   5    sont retenues par la   couronne    21 du couvercle de verrouillage 6.



   Le verrouillage de rotation latérale du manche du piston 2 est assuré par la languette de verrouillage 4 triangulaire venant s'insérer dans la chambre de verrouillage 16 sur la couronne 21 du couvercle de verrouillage 6. Le fait que cette languette soit triangulaire permet le dosage du   remplissage    de la seringue sans bloquer totalement le manche du piston 2 avant qu'il ne soit enfin de course, tout en empêchant cependant un déverrouillage de la rotation latérale et qui permettrait aux arêtes antitraction 5 de se remettre en position de traction dans l'encoche 17 du passage d'arêtes.



   Lorsque l'injection est sur le point de se terminer, les taquets de verrouillage   Il    s'écartent latéralement sous la pression du piston 8 tout en pénétrant dans les chambres 9 des taquets de verrouillage   1 1    situées sous la face inférieure du piston 8. Les taquets de verrouillage 11, comportant eux-mêmes des becs de blocage 23 qui, combinés avec le dispositif des arêtes antitraction 5 sur la couronne 21 du couvercle de verrouillage 6, empêchent toute rétraction du manche de piston 2 et du piston 8.



   La figure B représente une vue générale du poussoir 1 avec le manche de piston 2 et le piston 8. Les arêtes antitraction 5 et les arêtes   antipoussée    3 ainsi que la languette de blocage latéral 4 du manche de piston 2 sont réparties à raison d'environ un tiers chacun sur le pourtour du manche du piston 2.



   La figure C représente le piston 8 vu par-dessous avec le poussoir 1, les chambres 9 recevant les taquets de verrouillage   Il    et le passage 15 de coulissage pour le cylindre 20 interne du corps.



   La figure D représente en vue plongeante par-dessus le poussoir   l    avec le manche de piston 2, le piston 8, les arêtes antitraction 5 et les arêtes antipoussée 3, la languette de blocage de rotation latérale 4 ainsi que le passage 15 pour le coulissage sur le cylindre interne 20 du corps.



   La figure E représente le couvercle de verrouillage 6 vu pardessus, avec la couronne de verrouillage 21, l'encoche de passage des arêtes 17 et la chambre 16 de la languette de blocage de rotation latérale 4.



   La figure F représente en détail le piston 8, avec une section du manche du piston 2 et la ceinture de blocage 7, le passage 15 de coulissage du cylindre interne 20 du corps et les chambres 9 pour les taquets de verrouillage 1.  



   La figure G représente de dessous le piston 8 avec les chambres 9 pour les taquets de verrouillage   il    et le passage 15 de coulissage du cylindre 20 interne du corps.



   La figure H représente un détail du dispositif de rétraction de l'aiguille 14 avec la culasse 19 et le ressort de poussée 13 maintenus à l'intérieur du cylindre 20 interne du corps. Les taquets de verrouillage   il    avec les becs de blocage 23 sont plaqués contre la paroi du cylindre 20 interne du corps par élasticité du matériau, assurant ainsi l'étanchéité.



   Lorsque les taquets de verrouillage   il    s'écartent, l'étanchéité est assurée par les languettes flexibles d'étanchéité 22 qui se rabattent par élasticité du matériau. L'évacuation et la vidange du contenu sont assurées par les voies de passage 18 sur le pourtour de la paroi du cylindre 20 interne du corps et de la culasse 19.



   La présente invention n'est pas limitée aux formes particulières de l'exemple de réalisation décrit ici. Par exemple, le cylindre 20 interne du corps peut très bien être excentré à l'intérieur de la seringue, ou plaqué contre la paroi du cylindre 24 externe du corps, à l'intérieur ou à l'extérieur de celle-ci. 



  
 



   DESCRIPTION



   The present invention relates to a syringe provided with a self-retracting needle and with a self-locking piston in traction at the end of the stroke, as well as a self-locking piston sleeve when pushing the syringe and self-locking in traction during emptying the syringe, as well as a device for blocking the rotation of the plunger handle, preventing any further use of the syringe after injection and considerably reducing the risk of accidental injections.



   The syringes currently used are dangerous because of the risk of contamination that they can represent in the event of accidental injections in the hospital environment, or in the event of re-use or loan in the environment of drug addicts, particularly in the transmission of seropositivity.



   In addition, the danger of the transmission of seropositivity by accidental injections outside the environment of drug addicts lies in the fact that they often leave their syringe anywhere after use.



   Thus, these abandoned syringes represent a particularly serious potential danger for young children who find them in public gardens and who consider them as toys.



  In addition, syringes abandoned in garbage cans, public toilets or restaurants are also a danger for people responsible for roads or cleaning of places of toilet.



   The fact that the needle is automatically retractable after injection considerably reduces the risk of accidental needle sticking, unless you deliberately break the syringe and prevent it from being reused. The invention as described in the claim fulfills these aims and will be better understood on reading an example with reference to the drawings.



   Figure A shows the syringe in profile in general view.



   Figure B shows the pusher, the piston handle and the piston.



   Figures C, D, E show sections at different levels.



   Figure F shows a section of the piston.



   Figure G shows a plan view of the piston.



   Figure H shows a detail of the needle retraction device.



   When the piston 8 is pulled to fill the syringe, the anti-pulling edges 5 directed towards the pusher 1 pass through the notch 17 in the passage of the locking edges on the ring 21 of the locking cover 6.



   During this time, the anti-pushing edges 3 directed towards the piston 8 can, during the pulling, pass the crown 21 of the locking cover 6 by simple pressure due to the elasticity of the material, but cannot iron the crown 21 in the opposite direction after the rebound of the edge material, being retained precisely by the ring 21 of the locking cover 6.



   When the syringe is prepared for filling, the user can precisely dose the content thanks to the spaces between the anti-pull edges 5 and the anti-push edges 3. When the syringe is ready for injection, the user must have the pusher 1 and piston handle 2 a lateral rotation, so that the anti-pushing edges 3 are received in the notch of the edge passages 17, while, by said rotation, the anti-pulling edges 5 are locked by the crown 21 of the locking cover 6.



   Thus the piston 8 and the piston handle 2 can be pushed but not removed by the fact that the anti-push edges 3 are unlocked by passing in the notch of the edge passages 17, while the anti-pull edges 5 are retained by the crown. 21 of the locking cover 6.



   The lateral rotation lock of the piston handle 2 is ensured by the triangular locking tab 4 which is inserted in the locking chamber 16 on the crown 21 of the locking cover 6. The fact that this tongue is triangular allows the metering of the filling of the syringe without completely blocking the handle of the piston 2 before it is finally racing, while nevertheless preventing an unlocking of the lateral rotation and which would allow the anti-traction edges 5 to return to the traction position in the notch 17 of the passage of edges.



   When the injection is about to end, the locking tabs It deviates laterally under the pressure of the piston 8 while penetrating into the chambers 9 of the locking tabs 1 1 located under the underside of the piston 8. The locking tabs 11, themselves comprising locking spouts 23 which, combined with the device of the anti-pulling edges 5 on the ring 21 of the locking cover 6, prevent any retraction of the piston handle 2 and of the piston 8.



   FIG. B represents a general view of the pusher 1 with the piston handle 2 and the piston 8. The anti-pull edges 5 and the anti-push edges 3 as well as the lateral locking tab 4 of the piston handle 2 are distributed at a rate of approximately one third each around the circumference of the piston 2 handle.



   FIG. C shows the piston 8 seen from below with the pusher 1, the chambers 9 receiving the locking tabs II and the sliding passage 15 for the internal cylinder 20 of the body.



   Figure D shows a bird's eye view over the pusher l with the piston handle 2, the piston 8, the anti-pull edges 5 and the anti-push edges 3, the lateral rotation locking tab 4 as well as the passage 15 for sliding on the internal cylinder 20 of the body.



   FIG. E represents the locking cover 6 seen from above, with the locking crown 21, the notch for passage of the edges 17 and the chamber 16 of the lateral rotation locking tab 4.



   FIG. F shows in detail the piston 8, with a section of the handle of the piston 2 and the locking belt 7, the passage 15 for sliding the internal cylinder 20 of the body and the chambers 9 for the locking tabs 1.



   Figure G shows from below the piston 8 with the chambers 9 for the locking lugs 11 and the passage 15 for sliding the internal cylinder 20 of the body.



   Figure H shows a detail of the needle retraction device 14 with the yoke 19 and the thrust spring 13 held inside the internal cylinder 20 of the body. The locking tabs 11 with the locking spouts 23 are pressed against the wall of the internal cylinder 20 of the body by elasticity of the material, thus ensuring sealing.



   When the locking tabs move away, the sealing is ensured by the flexible sealing tabs 22 which fold down by elasticity of the material. The contents are evacuated and emptied by the passageways 18 around the periphery of the wall of the internal cylinder 20 of the body and of the cylinder head 19.



   The present invention is not limited to the particular forms of the embodiment described here. For example, the internal cylinder 20 of the body may very well be eccentric inside the syringe, or pressed against the wall of the external cylinder 24 of the body, inside or outside of the latter.


    

Claims (1)

REVENDICATION Seringue à aiguille, caractérisée en ce qu'elle comporte un corps à deux cylindres disposés l'un dans l'autre (20 et 24), un poussoir (1) rotatif relié à un manche de piston cylindrique (2) coulissant sur le cylindre interne (20) du corps, muni d'arêtes de blocage antipoussée (3), d'arêtes de blocage antitraction (5) ainsi qu'une languette (4) de blocage du piston en rotation, un couvercle de verrouillage (6) comportant une couronne de blocage (21) des arêtes entourant le manche de piston et munie d'une encoche (17) permettant le passage des arêtes de blocage antitraction (5) lors du remplissage de la chambre (10) de la seringue et, après rotation du manche du piston, le passage des arêtes de blocage antipoussée (3) lors de la vidange de la seringue,  CLAIM  Needle syringe, characterized in that it comprises a body with two cylinders arranged one inside the other (20 and 24), a rotary plunger (1) connected to a cylindrical piston handle (2) sliding on the cylinder internal (20) of the body, provided with anti-push locking edges (3), anti-pull locking edges (5) as well as a tongue (4) for locking the piston in rotation, a locking cover (6) comprising a locking ring (21) of the edges surrounding the piston handle and provided with a notch (17) allowing the passage of the anti-traction locking edges (5) when the chamber (10) of the syringe is filled and, after rotation the handle of the piston, the passage of the anti-pushing locking edges (3) when emptying the syringe, ainsi qu'une deuxième encoche (16) recevant la languette de blocage de rotation (4) en fin de course de vidange, empêchant toute nouvelle rotation du manche de piston (2) pour revenir en position de remplissage après la vidange de la seringue, les arêtes antipoussée (3) étant disposées par rapport aux arêtes antitraction (5) de telle manière que le manche du piston (2) ne puisse pas être repoussé durant le remplissage ou être retiré durant la vidange de la seringue, en ce que le piston (8) est maintenu au manche du piston (2) par une ceinture de blocage (7) en forme de U et comporte des logements (9) sur sa face inférieure destinés à recevoir des taquets de verrouillage (11), empêchant son retrait en fin de course de vidange, et un passage (15) pour le coulissage du cylindre intérieur (20),  as well as a second notch (16) receiving the rotation locking tab (4) at the end of the emptying stroke, preventing any further rotation of the piston handle (2) to return to the filling position after the emptying of the syringe, the anti-pushing edges (3) being arranged relative to the anti-pulling edges (5) in such a way that the plunger handle (2) cannot be pushed back during filling or be withdrawn during emptying of the syringe, in that the plunger (8) is held on the piston handle (2) by a U-shaped locking belt (7) and has housings (9) on its underside intended to receive locking tabs (11), preventing its removal by end of drain stroke, and a passage (15) for the sliding of the inner cylinder (20), en ce que l'aiguille (14) est reliée à une culasse (19) disposée dans le cylindre interne (20) du corps, comportant des voies de passage (18) sur son pourtour pour la vidange du liquide et munie d'un ressort de poussée (13) verrouillé par lesdits taquets de verrouillage (11) qui sont reliés à la paroi interne (20) et qui maintiennent la culasse à sa place, le tout étant libéré par la pression du piston (8) sur les taquets de verrouillage (11) qui, en s'écartant, permettent au ressort de poussée (13) de repousser la culasse (19) et l'aiguille (14) dans la chambre (12) du cylindre interne (20) pendant que les taquets de verrouillage (11) munis de becs de blocage (23) empêchent le retrait du piston (8) en venant se loger dans les logements (9) du piston (8).  in that the needle (14) is connected to a yoke (19) disposed in the internal cylinder (20) of the body, comprising passageways (18) on its periphery for draining the liquid and provided with a spring thrust (13) locked by said locking tabs (11) which are connected to the internal wall (20) and which hold the cylinder head in place, the whole being released by the pressure of the piston (8) on the locking tabs (11) which, by deviating, allow the thrust spring (13) to push the cylinder head (19) and the needle (14) into the chamber (12) of the internal cylinder (20) while the locking tabs (11) provided with locking nozzles (23) prevent the withdrawal of the piston (8) by being received in the housings (9) of the piston (8).
CH254488A 1988-07-05 1988-07-05 Syringe with two series of stops on piston - engageable by rotation with slot in cover to allow motion in one direction only CH669910A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH254488A CH669910A5 (en) 1988-07-05 1988-07-05 Syringe with two series of stops on piston - engageable by rotation with slot in cover to allow motion in one direction only

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH254488A CH669910A5 (en) 1988-07-05 1988-07-05 Syringe with two series of stops on piston - engageable by rotation with slot in cover to allow motion in one direction only

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CH669910A5 true CH669910A5 (en) 1989-04-28

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015634A1 (en) * 1989-06-12 1990-12-27 Grape Aps An injection syringe
EP0413414A1 (en) * 1989-08-14 1991-02-20 Chien-Hua Tsao Safety hypodermic syringe
FR2653667A1 (en) * 1989-11-02 1991-05-03 Floquet Nicole Syringe which can be used only once and which provides automatic protection of the needle after injection and locking
WO1991012842A1 (en) * 1990-03-01 1991-09-05 Advanced Protective Injection Systems B.V. Protection assembly for an injection syringe
US5095914A (en) * 1989-09-26 1992-03-17 Walter Sarstedt Geraete Und Verbrauchsmaterial Fuer Medizin & Wissenschaft Blood extraction device with one-way piston movement
WO1992018187A1 (en) * 1991-04-11 1992-10-29 Safe-T-Limited Syringe with retractable needle
CH681204A5 (en) * 1990-10-02 1993-02-15 Patrick Lamoni Disposable syringe
US5380295A (en) * 1992-12-14 1995-01-10 Mallinckrodt Medical, Inc. Delivery apparatus with mechanism preventing rearward movement of a piston disposed therein
EP0677298A1 (en) * 1994-04-13 1995-10-18 Lucette Renée Pince My Disposable device for parenteral injections
EP0747075A2 (en) * 1990-11-07 1996-12-11 MDC Investment Holdings, Inc. A needle device comprising means for needle retraction
EP0962230A2 (en) * 1990-11-07 1999-12-08 MDC Investment Holdings, Inc. Needle device, particularly hypodermic needle
EP2229969A1 (en) * 2009-03-16 2010-09-22 Becton Dickinson France Injection device
US7803132B2 (en) 2004-10-14 2010-09-28 Midland Medical Device Holdings, LLC Safety medical syringe with retractable needle
US7846135B2 (en) 2006-02-24 2010-12-07 Midland Medical Holding LLC Retractable needle syringe with needle trap

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015634A1 (en) * 1989-06-12 1990-12-27 Grape Aps An injection syringe
EP0413414A1 (en) * 1989-08-14 1991-02-20 Chien-Hua Tsao Safety hypodermic syringe
US5095914A (en) * 1989-09-26 1992-03-17 Walter Sarstedt Geraete Und Verbrauchsmaterial Fuer Medizin & Wissenschaft Blood extraction device with one-way piston movement
US5174301A (en) * 1989-09-26 1992-12-29 Walter Sarstedt Geraete Und Verbrauchsmaterial Fuer Medizin & Wissenschaft Blood extraction device testing method
FR2653667A1 (en) * 1989-11-02 1991-05-03 Floquet Nicole Syringe which can be used only once and which provides automatic protection of the needle after injection and locking
WO1991012842A1 (en) * 1990-03-01 1991-09-05 Advanced Protective Injection Systems B.V. Protection assembly for an injection syringe
US5364359A (en) * 1990-03-01 1994-11-15 Advanced Protective Injection Systems Medical B.V. Syringe with retractable needle
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