WO1989010152A1 - Non-reusable syringe - Google Patents

Non-reusable syringe Download PDF

Info

Publication number
WO1989010152A1
WO1989010152A1 PCT/FR1988/000206 FR8800206W WO8910152A1 WO 1989010152 A1 WO1989010152 A1 WO 1989010152A1 FR 8800206 W FR8800206 W FR 8800206W WO 8910152 A1 WO8910152 A1 WO 8910152A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
head
syringe
outlet nozzle
syringe according
Prior art date
Application number
PCT/FR1988/000206
Other languages
French (fr)
Inventor
André EMERIT
Michel Emerit
Jean-Patrick Emerit
Original Assignee
Emerit Andre
Michel Emerit
Emerit Jean Patrick
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 Emerit Andre, Michel Emerit, Emerit Jean Patrick filed Critical Emerit Andre
Publication of WO1989010152A1 publication Critical patent/WO1989010152A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50—Devices 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
    • A61M5/508—Means for preventing re-use by disrupting the piston seal, e.g. by puncturing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50—Devices 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
    • A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/3129—Syringe barrels

Definitions

  • the present invention relates to a disposable syringe, of the type comprising a tubular body terminated by an outlet nozzle, and a piston mounted to slide in the body and provided with a reed head relative to the body.
  • the invention therefore aims to provide a disposable syringe made so that it is automatically rendered unusable for new use, at the end of the piston stroke.
  • the syringe comprises means for rendering the piston non-tight relative to the body at the end of the stroke of the piston towards the outlet stage.
  • said means consist of notches formed together, on the one hand on the periphery of the piston head, and on the other hand on the internal wall of the body in an area close to the outlet nozzle, and these notches are shaped so as to allow the progression of the piston head towards the outlet nozzle and then to prohibit its return in the direction opposite.
  • the piston comprises two tubular parts of different diameters and smaller than that of the body, the tubular part contiguous to the head of the piston having a diameter less than that of the other tubular part, while that the piston head is provided with a peripheral collar in which a groove is formed constituting a rupture line, and the terminal part of the body situated in the vicinity of its outlet nozzle has a slightly greater internal diameter to that of the tubular part of the piston contiguous to the head of the latter, this end part of the body being separated by a transverse step from the rest of the body.
  • said means comprise an internal allowance for at least part of the region of the interior wall of the body situated in the vicinity of the outlet nozzle, this allowance being connected by a transverse step to the wall of the body, and in the head of the piston is provided, to the right of said extra thickness, a notch constituting a breaking point, so that a sector delimited by this notch separates from the head when the latter exceeds the transverse step.
  • FIG. 1 is a half-sectional view, mid elevation a first embodiment of the disposable syringe according to the invention
  • FIG. 2A is a view in axial partial section, on an enlarged scale, of the syringe of FIG.
  • Figure 1 showing the notches of the piston when they start to overlap those of the body at the end of the piston stroke
  • Figure 2B is a view similar to Figure 2A showing the two notches in mutual engagement
  • Figure 3 is a longitudinal sectional view and partial elevation of a second embodiment of the syringe according to the invention
  • Figure 4A is a partial axial sectional view on an enlarged scale of Figure 3, showing the piston head when it arrives at the level of the step of the body at the end of the stroke
  • Figure 4B is a view similar to Figure 4A showing the piston after rupture and separation of the flange on the step of the body
  • Figure 5 is a longitudinal sectional view and elevation of a third embodiment of the syringe
  • Figures 6 and 7 are sectional views transverse of the serigue following 6-6 and 7-7 respec ⁇ tivemen of Figure 5.
  • the disposable syringe shown in Figures 1 to 2B comprises a tubular body 1 terminated at one of its ends by an outlet nozzle 2 for the liquid, to which a needle not shown can be adapted. Its opposite end is provided with two radial ears 3 allowing the manipulation of the syringe.
  • This also includes a piston 4 mounted; sliding in the body 1, consisting of a head 5 which can slide in leaktight manner in the body 1 and of a support 6 at one end of which the head 5 is fixed.
  • the support 6 can be produced in different ways, for example by bars available in a cross, and an annular collar 7 is fixed to the end of the support 6 opposite the head 5, the circumference of the collar 7 projecting radially from the sup ⁇ port 4.
  • This syringe is provided with means per ⁇ making the head 5 of the piston 4 not leaktight relative to the inner wall of the body 1 e end of stroke of the piston 4 towards the outlet nozzle 2.
  • these means consist of combined notches 8, 9 formed, on the one hand on the periphery of the head 5 (notching), and on the other hand on the internal wall of the body 1 (notch 8) in an annular zone close to the nozzle 2.
  • the notch 9 forms a toothing which can flex elastically on the wall of the body 1 during the forward stroke of the piston 15, in order to ensure sealing with it.
  • ci Figure 2A
  • each tooth of the notch 9 has a side 9a perpendicular to laire to the axis XX of the piston 4 ( Figure 2B), and a side 9b inclined on the axis XX and of a length greater than that of the side 9a.
  • the notch 8 of the body 1 is formed of teeth, each of which has a side 8a perpendicular to the axis X-X, and a side 8b inclined on this axis and of a length greater than that of the side 8a.
  • flanks 8b and 9b are opposite, and the diameter defined by the tops of the teeth 8a, 8b is slightly greater than the internal diameter of the body 1.
  • the flanks 9a have, in section, a length greater than that of the flanks 8a.
  • the head 5 In the syringe storage position, the head 5 is placed just before the notch 8, and one end 11 of the piston protrudes outside the body 1.
  • the syringe is provided with a removable member 12 for holding the piston 4 in this position, for example a split crown enveloping the end 11 and bearing, on the one hand on the terminal part of the body 1, at the ears 3, and on the other hand on the collar 7.
  • the crown 12 is made of any suitable material, such as cardboard or plastic material. The procedure for using this syringe is as follows.
  • the piston 13 comprises two tubular parts 14, 15 of different diameters and smaller than that of the body 16.
  • the tubular part 15 adjoins the head 17 of piston 13 extends over a length much less than that of second part 14, - and its diameter is less than that of said part 14.
  • Head 17 is provided with a peripheral flange 18 which can slide in leaktight manner in the body 16.
  • annular groove 19 is formed, constituting a breaking line.
  • the end 21 of the body 16 located near the nozzle 2 has an internal diameter slightly larger than that of the tubular part 15, and 7 practically equal to the diameter of the groove 19.
  • the end 21 extends over a length substantially equal to that of the tubular part 15, and it is separated by a transverse step 22 from the rest of the body
  • step 22 can come into abutment a corresponding transverse step 23 constituting the transition between the tubular parts 15 and 16.
  • the crown 12 maintains the piston 14 in a position such that its head 17 is slightly above the step 22. After removing the crown 12 and filling the syringe, the collar 18 slides so
  • the syringe is therefore made totally unusable, the diameter of the tubular part 14 being in fact less than the inside diameter of the part of the body 16 outside its end 21.
  • the syringe In the third embodiment of the syringe ( Figures 5 to 7), it comprises a body 24 whose section is ovalized and which has, in the region of its inner wall located in the vicinity of the outlet nozzle 2, an inner thickness 25.
  • the latter extends over a determined angular sector (which can vary quite widely) and axially up to the end of the body 24 into which opens H '-jutage 2.
  • the additional thickness 25 is connected to the thinner coxx-sp ⁇ ndante part of the wall of the body 24 by a transverse step 26.
  • the piston 27 comprises two tubular parts 28, 29 and a head 31 fixed to the end of the part 2.
  • the latter extends over a length approximately equal to that of the extra thickness 25, and is connected to the portion 28 of greater length, by a transverse step 32 adapted to be able to come into abutment on the step 26.
  • the surface of the part 28 is separated by a certain distance from the internal wall of the body 24.
  • the head 31 is provided with a peripheral sealing collar 33. In the face of the latter facing the nozzle 2, is formed, in line with the repeater 25, a notch 34 constituting an initiation of rupture of the corresponding sector of the collar 3J3-.
  • the collar 33 slides in leaktight manner on the internal surface of the body 24.
  • this causes the rupture of the sector 33a delimited by the notch 34.
  • the descent of the piston 27 continues, the head 31 separated from the sector 33a slides in leaktight fashion on the surface of the extra thickness 25 and on the rest of the terminal part of the body 24, until the end of the piston stroke.
  • the sector 33a remains trapped in the annular space delimited by the internal face of the head 31 and the annular step 32 on the one hand, and by the internal surface of the body 24 and the tubular part 29 d 'somewhere else.
  • the invention is not limited to the embodiments described and may include alternative embodiments.
  • the syringe of Figures 5 1 7 could include more than one thickened sector such as 25, for example two arranged on opposite sides of the body, the piston head then obviously having two corresponding separable sectors.
  • the sections of the body and of the piston may be any, and not exclusively tubular, for example cruciform for the piston.

Landscapes

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

Abstract

Non-reusable syringe, comprising a tubular body (16) ending in an outlet jet (2) and a piston (13). Said piston (13) comprises two parts having different cross-sections, smaller than those of the body (16). The head (17) of the piston (13) is provided with a peripheral collar (18) in which is formed a groove (19) constituting a breakage line. The end part (21) of the body (16) located in the vicinity of its outlet jet (2) has an inside diameter slightly greater than that of the terminal portion (15) of the piston (13) adjacent to the head (17), but less than that of the peripheral collar.

Description

Seringue à usage unique Single use syringe
La présente invention a pour objet une seringue à usage unique, du type comprenant un corps tubulaire terminé par un ajutage de sortie, et un piston monté coulissant dans le corps et pourvu d'une tête é anche par rapport au corps.The present invention relates to a disposable syringe, of the type comprising a tubular body terminated by an outlet nozzle, and a piston mounted to slide in the body and provided with a reed head relative to the body.
On sait que les seringues dites à usage unique ou "jetables" dont le corps et le piston sont réalisés en matière plastique, ne doivent être impé¬ rativement utilisées qu'une seule fois, en raison de la difficulté de les stériliser à nouveau après le premier usage. Or, on constate que dans certaines circonstances, cet impératif de sécurité n'est pas respecté, ce qui peut entraîner chez le patient de graves complications. L'invention a donc pour but de proposer une seringue à usage unique réalisée de manière qu'elle soit automatiquement rendue inutilisable pour un nou¬ vel usage, en fin de course du piston.We know that the so-called single-use or "disposable" syringes whose body and plunger are made of plastic, must only be used once, because of the difficulty of sterilizing them again after first use. However, we note that in certain circumstances, this safety imperative is not respected, which can lead to serious complications for the patient. The invention therefore aims to provide a disposable syringe made so that it is automatically rendered unusable for new use, at the end of the piston stroke.
Suivant l'invention, la seringue comporte des moyens pour rendre le piston non étanche par rap¬ port au corps en fin de course du piston vers l'aju¬ tage de sortie.According to the invention, the syringe comprises means for rendering the piston non-tight relative to the body at the end of the stroke of the piston towards the outlet stage.
En effet, la suppression de 1'étanchéité du piston par rapport au corps lors du premier usage de la seringue rend celle-ci complètement inutilisable pour un second usage.Indeed, the removal of the piston seal relative to the body during the first use of the syringe makes it completely unusable for a second use.
Suivant un premier mode de réalisation, les- dits moyens sont constitués par des crantages conju¬ gués formés, d'une part sur la périphérie de la tête du piston, et d'autre part sur la paroi interne du corps dans une zone voisine de l'ajutage de sortie, et ces crantages sont profilés de manière à autoriser la progression de la tête du piston vers l'ajutage de sortie et à interdire ensuite son retour dans le sens opposé.According to a first embodiment, said means consist of notches formed together, on the one hand on the periphery of the piston head, and on the other hand on the internal wall of the body in an area close to the outlet nozzle, and these notches are shaped so as to allow the progression of the piston head towards the outlet nozzle and then to prohibit its return in the direction opposite.
Si dans ces conditions, en fin de course du piston après que la tête de celui-ci ait dépassé es crantages du corps, on exerce sur le piston une trac- tion pour le ramener à sa position de départ, les crantages du corps, étant en prise avec ceux de la tête du piston, s'opposent à ce retour en arrière. Si la traction sur le piston est néanmoins suffisante pour le ramener en-deçà des crantages du corps, ce retour provoque la destruction des crantages de la tète du piston et par conséquent la perte de l'étan- chéité du piston par rapport au corps, nécessaire au fonctionnement de la seringue.If under these conditions, at the end of the piston stroke after the head of the latter has exceeded the notches of the body, a pull is exerted on the piston to bring it back to its starting position, the notches of the body being in engagement with those of the piston head, oppose this backtracking. If the traction on the piston is nevertheless sufficient to bring it back below the notches of the body, this return causes the destruction of the notches of the head of the piston and consequently the loss of the seal of the piston with respect to the body, necessary for the operation of the syringe.
Selon un autre mode de réalisation, le pis- ton comprend deux parties tubulaires de diamètres différents et inférieurs à celui du corps, la partie tubulaire contigue à la tète du piston ayant un dia¬ mètre inférieur à celui de l'autre partie tubulaire, tandis que la tète du piston est pourvue d'une col- lerette périphérique dans laquelle est formée une gor¬ ge constituant une ligne de rupture, et la partie ter¬ minale du corps située au voisinage de son ajutage de sortie a un diamètre intérieur légèrement supérieur à celui de la partie tubulaire du piston contigue à la tète de ce dernier, cette partie terminale du corps étant séparée par un gradin transversal du reste du corps.According to another embodiment, the piston comprises two tubular parts of different diameters and smaller than that of the body, the tubular part contiguous to the head of the piston having a diameter less than that of the other tubular part, while that the piston head is provided with a peripheral collar in which a groove is formed constituting a rupture line, and the terminal part of the body situated in the vicinity of its outlet nozzle has a slightly greater internal diameter to that of the tubular part of the piston contiguous to the head of the latter, this end part of the body being separated by a transverse step from the rest of the body.
Selon un troisième mode de réalisation pos¬ sible de l'invention, lesdits moyens comprennent une surépaisseur intérieure d'une partie au moins de la région de la paroi intérieure du corps située au voi¬ sinage de l'ajutage de sortie, cette surépaisseur étant reliée par une marche transversale à la paroi du corps, et dans la tète du piston est ménagée, au droit de ladite surépaisseur, une encoche constituant une amorce de rupture, de telle sorte qu'un secteur déli¬ mité par cette encoche se sépare de la tête lorsque celle-ci dépasse la marche transversale. D'autres particularités et avantages deAccording to a third possible embodiment of the invention, said means comprise an internal allowance for at least part of the region of the interior wall of the body situated in the vicinity of the outlet nozzle, this allowance being connected by a transverse step to the wall of the body, and in the head of the piston is provided, to the right of said extra thickness, a notch constituting a breaking point, so that a sector delimited by this notch separates from the head when the latter exceeds the transverse step. Other features and advantages of
1'invention apparaîtront au cours de la description qui va suivre, faite en référence aux dessins annexés qui en illustrent plusieurs modes de réalisation à titre d'exemples non limitatifs : - la Figure 1 est une vue mi-coupe, mi- élévation d'une première forme de réalisation de la seringue à usage unique selon l'invention; la Figure 2A est une vue en coupe par¬ tielle axiale, à échelle agrandie de la seringue de la Figure 1 montrant les crantages du piston lorsqu'ils commencent à chevaucher ceux du corps en fin de course du piston; la Figure 2B est une vue analogue à la Figure 2A montrant les deux crantages en prise mu- tuelle; la Figure 3 est une vue en coupe longi¬ tudinale et élévation partielle d'un second mode de réalisation de la seringue selon l'invention; la Figure 4A est une vue en coupe axiale partielle à échelle agrandie de la Figure 3, montrant la tête du piston lorsqu'elle arrive au niveau du gradin du corps en fin de course; la Figure 4B est une vue analogue à la Figure 4A montrant le piston après rupture et sépa- ration de la collerette sur le gradin du corps; la Figure 5 est une vue en coupe longitu¬ dinale et élévation d'un troisième mode de réalisation de la seringue; les Figures 6 et 7 sont des vues en coupe transversale de la serigue suivant 6-6 et 7-7 respec¬ tivemen de la Figure 5.1'invention will appear during the description which follows, made with reference to the accompanying drawings which illustrate several embodiments by way of non-limiting examples: - Figure 1 is a half-sectional view, mid elevation a first embodiment of the disposable syringe according to the invention; FIG. 2A is a view in axial partial section, on an enlarged scale, of the syringe of FIG. 1 showing the notches of the piston when they start to overlap those of the body at the end of the piston stroke; Figure 2B is a view similar to Figure 2A showing the two notches in mutual engagement; Figure 3 is a longitudinal sectional view and partial elevation of a second embodiment of the syringe according to the invention; Figure 4A is a partial axial sectional view on an enlarged scale of Figure 3, showing the piston head when it arrives at the level of the step of the body at the end of the stroke; Figure 4B is a view similar to Figure 4A showing the piston after rupture and separation of the flange on the step of the body; Figure 5 is a longitudinal sectional view and elevation of a third embodiment of the syringe; Figures 6 and 7 are sectional views transverse of the serigue following 6-6 and 7-7 respec¬ tivemen of Figure 5.
La seringue à usage unique représentée aux Figures 1 à 2B comprend un corps tubulaire 1 terminé à l'une de ses extrémités par un ajutage de sortie 2 du liquide, auquel peut être adaptée une aiguille non re¬ présentée. Son extrémité opposée est munie de deux oreilles radiales 3 permettant la manipulation de la seringue. Celle-ci comprend également un piston 4 mon- té; coulissant dans le corps 1, constitué d'une tête 5 pouvant coulisser de manière étanche dans le corps 1 et d'un support 6 à 1'une des extrémités duquel est fixée la tête 5.The disposable syringe shown in Figures 1 to 2B comprises a tubular body 1 terminated at one of its ends by an outlet nozzle 2 for the liquid, to which a needle not shown can be adapted. Its opposite end is provided with two radial ears 3 allowing the manipulation of the syringe. This also includes a piston 4 mounted; sliding in the body 1, consisting of a head 5 which can slide in leaktight manner in the body 1 and of a support 6 at one end of which the head 5 is fixed.
Le support 6 peut être réalisé de diffé- rentes manières, par exemple par des barrettes dispo¬ sées en croix, et un collet annulaire 7 est fixé à 1'extrémité du support 6 opposé à la tète 5, le pour¬ tour du collet 7 faisant saillie radialement du sup¬ port 4. Cette seringue est pourvue de moyens per¬ mettant de rendre la tête 5 du piston 4 non étanche par rapport à la paroi intérieure du corps 1 e fin de course du piston 4 vers 1'ajutage de sortie 2.The support 6 can be produced in different ways, for example by bars available in a cross, and an annular collar 7 is fixed to the end of the support 6 opposite the head 5, the circumference of the collar 7 projecting radially from the sup¬ port 4. This syringe is provided with means per¬ making the head 5 of the piston 4 not leaktight relative to the inner wall of the body 1 e end of stroke of the piston 4 towards the outlet nozzle 2.
Dans cet exemple de réalisation, ces moyens sont constitués par des crantages conjugués 8, 9 for¬ més, d'une part sur la périphérie de la tête 5 (cran- tage ) , et d'autre part sur la paroi interne du corps 1 (crantage 8) dans une zone annulaire voisine de l'ajutage 2. Le crantage 9 forme une denture pouvant fléchir élastiquement sur la paroi du corps 1 pendant la course aller du piston 15, afin d'assurer l'étan- chéité avec celui-ci (Figure 2A) . Au repos, chaque dent du crantage 9 présente un flanc 9a perpendicu- laire à l'axe X-X du piston 4 (Figure 2B) , et un flanc 9b incliné sur l'axe X-X et d'une longueur supérieure à celle du flanc 9a.In this exemplary embodiment, these means consist of combined notches 8, 9 formed, on the one hand on the periphery of the head 5 (notching), and on the other hand on the internal wall of the body 1 (notch 8) in an annular zone close to the nozzle 2. The notch 9 forms a toothing which can flex elastically on the wall of the body 1 during the forward stroke of the piston 15, in order to ensure sealing with it. ci (Figure 2A). At rest, each tooth of the notch 9 has a side 9a perpendicular to laire to the axis XX of the piston 4 (Figure 2B), and a side 9b inclined on the axis XX and of a length greater than that of the side 9a.
Le crantage 8 du corps 1 est formé de dents dont chacune comporte un flanc 8a perpendiculaire à l'axe X-X, et un flanc 8b incliné sur cet axe et d'une longueur supérieure à celle du flanc 8a.The notch 8 of the body 1 is formed of teeth, each of which has a side 8a perpendicular to the axis X-X, and a side 8b inclined on this axis and of a length greater than that of the side 8a.
Les inclinaisons des flancs 8b et 9b sont opposées, et le diamètre défini par les sommets des dents 8a, 8b est légèrement supérieur au diamètre intérieur du corps 1. De plus, les flancs 9a ont, en section, une longueur supérieure à celle des flancs 8a.The inclinations of the flanks 8b and 9b are opposite, and the diameter defined by the tops of the teeth 8a, 8b is slightly greater than the internal diameter of the body 1. In addition, the flanks 9a have, in section, a length greater than that of the flanks 8a.
En position de stockage de la seringue, la tète 5 se trouve placée juste avant le crantage 8, et une extrémité 11 du piston dépasse à l'extérieur du corps 1. La seringue est munie d'un organe amovible 12 de maintien du piston 4 dans cette position, par exemple une couronne fendue enveloppant l'extrémité 11 et prenant appui, d'une part sur la partie terminale du corps 1, au niveau des oreilles 3, et d'autre part sur le collet 7. La couronne 12 est réalisée en tout matériau approprié, tel que carton ou matière plasti¬ que. Le mode d'utilisation de cette seringue est le suivant.In the syringe storage position, the head 5 is placed just before the notch 8, and one end 11 of the piston protrudes outside the body 1. The syringe is provided with a removable member 12 for holding the piston 4 in this position, for example a split crown enveloping the end 11 and bearing, on the one hand on the terminal part of the body 1, at the ears 3, and on the other hand on the collar 7. The crown 12 is made of any suitable material, such as cardboard or plastic material. The procedure for using this syringe is as follows.
Après enlèvement de la courone 12 et fixa¬ tion d'une aiguille sur l'ajutage 2, l'utilisateur tire le piston 4 vers l'arrière jusqu'à remplissage de la seringue. L'injection peut alors être effectuée, le crantage 9 glissant de manière étanche sur la paroi intérieure du corps 1 avec fléchissement élastique de ses dents sur ce dernier. Lorsque la tête 5 arrive au niveau du crantage 8, les sommets des dents du cran- tage glissent élastiquement sur les flancs inclinés 8b (Figure 2A) , jusqu'à ce que la tête 5 arrive en fin de course légèrement au-delà du crantage 9 (Figure 2B) . Si l'utilisateur tente alors de ramener le piston 4 en arrière, les crantages 8 et 9 viennent en prise l'un dans l'autre comme visible à la Figure 2B : les., flancs 9a qui étaient inclinés pendant la course aT-Iex. se redressent perpendiculairement à l'axe X-X et s'imbriquent dans le crantage 8 contre les flancs 8a, qui s'opposent au retour du piston 4. Si 1'utilisateur exerce néanmoins une traction suffisante pour forcer le piston 4 de manière que sa tète 5 dépasse le cran¬ tage 9, ce déplacement entraîne la destruction des dents du crantage 9, qui de par leur conformation ne peuvent fléchir dans ce sens de déplacement. Cette destruction supprime 1'étanchéité entre la tête 5 et le corps 1 , rendant la seringue complètement inuti¬ lisable pour un second usage. Dans—la -seconde forme de-réalisation (Figu¬ res 3, 4A, 4B) , le piston 13 comprend deux parties tubulaires 14, 15 de diamètres différents et infé¬ rieurs à celui du corps 16. La partie tubulaire 15 contigue à la tête 17 du piston 13 s'étend sur une longueur très inférieure à celle de la seconde partie 14,- et son diamètre est inférieur à celui de ladite partie 14. La tête 17 est pourvue d'une collerette périphérique 18 pouvant coulisser de manière étanche dans le corps 16. Dans la face de la collerette 18 tournée vers l'ajutage 2, est ménagée une gorge an¬ nulaire 19 constituant une ligne de rupture.After removing the crown 12 and fixing a needle on the nozzle 2, the user pulls the piston 4 backwards until the syringe is filled. The injection can then be carried out, the notch 9 sliding in leaktight fashion on the internal wall of the body 1 with elastic deflection of its teeth on the latter. When the head 5 reaches the level of the notch 8, the tops of the teeth of the notch tage slide elastically on the inclined sides 8b (Figure 2A), until the head 5 reaches the end of the stroke slightly beyond the notch 9 (Figure 2B). If the user then tries to bring the piston 4 back, the notches 8 and 9 engage one inside the other as visible in FIG. 2B: the flanks 9a which were inclined during the stroke aT-Iex . straighten perpendicular to the axis XX and nest in the notch 8 against the sides 8a, which oppose the return of the piston 4. If the user nevertheless exerts sufficient traction to force the piston 4 so that its head 5 exceeds the cran¬ floor 9, this displacement causes the destruction of the teeth of the notch 9, which by their conformation can not bend in this direction of movement. This destruction removes the seal between the head 5 and the body 1, making the syringe completely useless for second use. In — the second embodiment (FIGS. 3, 4A, 4B), the piston 13 comprises two tubular parts 14, 15 of different diameters and smaller than that of the body 16. The tubular part 15 adjoins the head 17 of piston 13 extends over a length much less than that of second part 14, - and its diameter is less than that of said part 14. Head 17 is provided with a peripheral flange 18 which can slide in leaktight manner in the body 16. In the face of the flange 18 facing the nozzle 2, an annular groove 19 is formed, constituting a breaking line.
L'extrémité 21 du corps 16 située au voi¬ sinage de l'ajutage 2 a un diamètre intérieur légè¬ rement supérieur à celui de la partie tubulaire 15, et 7 pratiquement égal au diamètre de la gorge 19. L'extrémité 21 s'étend sur une longueur sensiblement égale à celle de la partie tubulaire 15, et elle est séparée par un gradin transversal 22 du reste du corpsThe end 21 of the body 16 located near the nozzle 2 has an internal diameter slightly larger than that of the tubular part 15, and 7 practically equal to the diameter of the groove 19. The end 21 extends over a length substantially equal to that of the tubular part 15, and it is separated by a transverse step 22 from the rest of the body
5 16. Sur ce gradin 22 peut venir en butée un gradin transversal correspondant 23 constituant la transition entre les parties tubulaires 15 et 16.5 16. On this step 22 can come into abutment a corresponding transverse step 23 constituting the transition between the tubular parts 15 and 16.
Le fonctionnement de la seringue des Figures 33 à.4B est le suivant.The operation of the syringe of Figures 33 to 4B is as follows.
10 En position de stockage, la couronne 12 maintient le piston 14 dans une position telle que sa tête 17 se trouve légèrement au-dessus du gradin 22. Après enlèvement de la couronne 12 et remplissage de la seringue, la collerette 18 coulisse de manière 1 0 In the storage position, the crown 12 maintains the piston 14 in a position such that its head 17 is slightly above the step 22. After removing the crown 12 and filling the syringe, the collar 18 slides so
15 étanche dans le corps 16. Lorsque la tête 17 arrive au niveau du gradin 22, celui-ci forme pour la collerette 18 une butée d'arrêt et entraine la rupture du collet 18 au niveau de la gorge 19, de sorte que le collet 18 se sépare du reste de la tête 17. La progression de15 sealed in the body 16. When the head 17 arrives at the level of the step 22, the latter forms a stop for the collar 18 and causes the collar 18 to break at the groove 19, so that the collar 18 separates from the rest of the head 17. The progression of
20 cette dernière se poursuit de manière étanche dans la partie terminale 21, tandis que le collet 18 est rete¬ nu dans le volume annulaire laissé libre entre les gradins 22 et 23, la paroi du corps 16 et la partie tubulaire 15.20 the latter continues in a sealed manner in the terminal part 21, while the collar 18 is rete¬ naked in the annular volume left free between the steps 22 and 23, the wall of the body 16 and the tubular part 15.
25 Après la fin de la course de la tête 17 dans la partie terminale 21, si l'utilisateur veut ramener le piston 13 en arrière, 1'étanchéité entre la tête 17 et le corps 16 disparaît dès que la tête 17 a franchi le gradin 22, en raison de la séparation de la colle-25 After the end of the stroke of the head 17 in the end portion 21, if the user wants to bring the piston 13 back, the seal between the head 17 and the body 16 disappears as soon as the head 17 has crossed the step 22, due to the separation of the glue
30 rette 18. La seringue est donc rendue totalement inu¬ tilisable, le diamètre de la partie tubulaire 14 étant en effet inférieur au diamètre intérieur de la partie du corps 16 extérieure à son extrémité 21.30 0 rette 18. The syringe is therefore made totally unusable, the diameter of the tubular part 14 being in fact less than the inside diameter of the part of the body 16 outside its end 21.
Dans la troisième forme de réalisation de la seringue (Figures 5 à 7), celle-ci comprend un corps 24 dont la section est ovalisée et qui présente, dans la région de sa paroi intérieure située au voisinage de l'ajutage de sortie 2, une surépaisseur intérieure 25. Celle-ci s 'étend sur un secteur angulaire déter¬ miné (pouvant varier assez largement) et axialement jusqu'à l'extrémité du corps 24 dans laquelle débouche H' -jjutage 2. La surépaisseur 25 est reliée à la partie coxx-espσndante plus mince de la paroi du corps 24 par une marche transversale 26.In the third embodiment of the syringe (Figures 5 to 7), it comprises a body 24 whose section is ovalized and which has, in the region of its inner wall located in the vicinity of the outlet nozzle 2, an inner thickness 25. The latter extends over a determined angular sector (which can vary quite widely) and axially up to the end of the body 24 into which opens H '-jutage 2. The additional thickness 25 is connected to the thinner coxx-spσndante part of the wall of the body 24 by a transverse step 26.
Le piston 27 comporte deux parties tubulai- res 28, 29 et une tête 31 fixée à l'extrémité de la partie 2 . Cette dernière s'étend sur une longueur à peu près égale à celle de la surépaisseur 25, et est reliée à la partie 28 de plus grande longueur, par une marche transversale 32 adaptée pour pouvoir venir en butée sur la marche 26. La surface de la partie 28 est séparée d'une certaine distance de la paroi interne du corps 24. La tête 31 est munie d'une collerette péri- phérique d'étanchéité 33. Dans la face de celle-ci tournée vers l'ajutage 2, est ménagée, au droit de la s repaisseur 25, une encoche 34 constituant une amorce de rupture du secteur correspondant de la collerette 3J3-. Le fonctionnement de ce mode de réalisation e_s_t le suivant.The piston 27 comprises two tubular parts 28, 29 and a head 31 fixed to the end of the part 2. The latter extends over a length approximately equal to that of the extra thickness 25, and is connected to the portion 28 of greater length, by a transverse step 32 adapted to be able to come into abutment on the step 26. The surface of the part 28 is separated by a certain distance from the internal wall of the body 24. The head 31 is provided with a peripheral sealing collar 33. In the face of the latter facing the nozzle 2, is formed, in line with the repeater 25, a notch 34 constituting an initiation of rupture of the corresponding sector of the collar 3J3-. The operation of this embodiment is the following.
Pendant la descente de la tête 31 vers la SEurépaisseur 22, la collerette 33 coulisse de manière étanche sur la surface intérieure du corps 24. Lorsque la tête 31 parvient au niveau de la marche 26, celle- ci provoque la rupture du secteur 33a délimité par l'encoche 34. La descente du piston 27 se poursuivant, la_ tète 31 séparée du secteur 33a coulisse de manière étanche sur la surface de la surépaisseur 25 et sur le reste de la partie terminale du corps 24, jusqu'à la fin de la course du piston. Pendant la fin de cette course, le secteur 33a reste prisonnier dans l'espace annulaire délimité par la face intérieure de la tête 31 et la marche annulaire 32 d'une part, et par la surface intérieure du corps 24 et la partie tubulaire 29 d'autre part.During the descent of the head 31 towards the SE thickness 22, the collar 33 slides in leaktight manner on the internal surface of the body 24. When the head 31 reaches the level of the step 26, this causes the rupture of the sector 33a delimited by the notch 34. The descent of the piston 27 continues, the head 31 separated from the sector 33a slides in leaktight fashion on the surface of the extra thickness 25 and on the rest of the terminal part of the body 24, until the end of the piston stroke. During the end of this race, the sector 33a remains trapped in the annular space delimited by the internal face of the head 31 and the annular step 32 on the one hand, and by the internal surface of the body 24 and the tubular part 29 d 'somewhere else.
Si l'utilisateur veut alors ramener le pis¬ ton 27 à sa position initiale, ce retour en arrière est possible mais l'étanchéité entre la tête 31 et le corps 24 disparaît dès que la tête 31 a dépassé la mar¬ che 26, rendant la seringue inutilisable pour une nou¬ velle injection.If the user then wants to return the pis¬ ton 27 to its initial position, this backtracking is possible but the seal between the head 31 and the body 24 disappears as soon as the head 31 has passed the step 26, making the syringe unusable for a new injection.
L'invention n'est pas limitée aux formes de réalisation décrites et peut comporter des variantes d'exécution. Ainsi, la seringue des Figures 5 1 7 pour¬ rait comporter plus d'un secteur surépaissi tel que 25, par exemple deux agencés sur les côtés opposés du corps, la tête du piston étant alors évidemment pourvue de deux secteurs séparables correspondants. De même les sections du corps et du piston peuvent être quelconques, et non exclusivement tubulaires, par exemple cruciformes pour le piston. The invention is not limited to the embodiments described and may include alternative embodiments. Thus, the syringe of Figures 5 1 7 could include more than one thickened sector such as 25, for example two arranged on opposite sides of the body, the piston head then obviously having two corresponding separable sectors. Likewise, the sections of the body and of the piston may be any, and not exclusively tubular, for example cruciform for the piston.

Claims

REVENDICATIONS
1. Seringue à usage unique, comprenant un corps tubulaire (16,24) terminé par un ajutage de sortie (2) et un piston .(13,27) monté coulissant dans le corps et pourvu d'une tête (17,31) étanche par rapport au corps, ainsi que des moyens pour rendre le piston (13,27) non étanche par rapport au corps (16,24) en fin de course du piston vers l'ajutage de sortie- (2)F caractérisée en ce que le piston (13) comprend d'eux parties (14,15) de sections différentes et inférieures à celle du corps (16), la partie (15) contigue à la tête <17) du piston (13) ayant une section inférieure à celle de l'autre partie (14), tandis que la tête (17) du piston est pourvue d'une collerette périphérique (18) dans laquelle est formée une gorge (19) constituant une ligne de rupture, et la partie terminale (21) du corps (16) située au voisinage de son ajutage de sortie (2) a un diamètre intérieur légèrement supérieur à celui de la partie (15) du piston (13) contigue à la tête (17) de ce dernier, cette partie terminale (21) du corps (16) é-tant séparée par un, gradin annulaire (22) ou transversal (25) du reste du corps.1. Disposable syringe, comprising a tubular body (16,24) terminated by an outlet nozzle (2) and a piston. (13,27) mounted sliding in the body and provided with a head (17,31) watertight with respect to the body, as well as means for rendering the piston (13,27) not leaktight with respect to the body (16,24) at the end of the stroke of the piston towards the outlet nozzle- (2) F characterized in that that the piston (13) comprises of them portions (14,15) of different sections and less than that of the body (16), the portion (15) contiguous to the head <17) of the piston (13) having a lower section to that of the other part (14), while the head (17) of the piston is provided with a peripheral flange (18) in which is formed a groove (19) constituting a rupture line, and the end part ( 21) of the body (16) located in the vicinity of its outlet nozzle (2) has an internal diameter slightly greater than that of the part (15) of the piston (13) adjacent to the head (17) of the latter, this terminal part (21) of the body (16) being separated by an annular (22) or transverse (25) step from the rest of the body.
2. Seringue selon la revendication 1 , caractérisée en ce que la gorge (19) est ménagée dans la_. face de la collerette (18) tournée vers l'ajutage dfc sortie (2) .2. Syringe according to claim 1, characterized in that the groove (19) is formed in la_. face of the flange (18) facing the outlet dfc nozzle (2).
3. Seringue selon la revendication 1 , caractérisée en ce que lesdits moyens comprennent une surepaisseur intérieure (25) d'une partie au moins de la région de la paroi intérieure du corps (24) située au voisinage de l'ajutage de sortie (2) r cette surépaisseur (25) étant reliée par une marche transversale (26) à la paroi du corps (24), et dans la tête (31) du piston (27) est ménagée, au droit de ladite surépaisseur, une encoche (34) constituant une amorce de rupture, de telle sorte qu'un secteur (33a) délimité par cette encoche (34) se sépare de la tête (31) lorsque celle-ci dépasse la marche transversale (26). . Seringue selon la revendication 3, caractérisée en ce que la surépaisseur (25) s'étend axialement jusqu'à l'extrémité du corps (24) munie de l'ajutage de sortie (2), afin que la tête (31) séparée du secteur (33a) puisse coulisser sur la surépaisseur de manière étanche en fin de course du piston (27).3. Syringe according to claim 1, characterized in that said means comprise an internal extra thickness (25) of at least part of the region of the internal wall of the body (24) located in the vicinity of the outlet nozzle (2 ) r this extra thickness (25) being connected by a transverse step (26) to the wall of the body (24), and in the head (31) of the piston (27) is formed, in line with said additional thickness, a notch (34) constituting a starting point for rupture, so that a sector (33a) delimited by this notch (34) separates from the head (31) when the latter exceeds the transverse step (26). . Syringe according to claim 3, characterized in that the additional thickness (25) extends axially to the end of the body (24) provided with the outlet nozzle (2), so that the head (31) separated from the sector (33a) can slide over the additional thickness in a sealed manner at the end of the stroke of the piston (27).
5. Seringue selon la revendication 4, caractérisée en ce que, le piston (27) étant formé par un élément tubulaire supportant la tête (31), la zone (29) de cet élément tubulaire contigue à la tête (31) délimite avec la paroi interne du corps (24) un volume suffisant pour recevoir le secteur (33a) détaché de l'a tête (31) après rupture sur la surépaisseur intérieure (25) .5. Syringe according to claim 4, characterized in that, the piston (27) being formed by a tubular element supporting the head (31), the zone (29) of this tubular element contiguous to the head (31) delimits with the internal wall of the body (24) sufficient volume to receive the sector (33a) detached from the head (31) after rupture on the internal excess thickness (25).
6. Seringue selon l'une des revendications 1 à 5, dans laquelle avant utilisation, une extrémité (11) du piston (13,27) dépasse à l'extérieur du corps (16,24) et est pourvue d'un collet (7) terminal saillant radialement sur le pourtour de ladite extrémité, caractérisée en ce qu'elle est munie d'un organe amovible de maintien du piston dans cette position, par exemple une couronne fendue (12) enveloppant 1'extrémité (11) du piston et prenant appui, d'une part sur la partie terminale du corps et d'autre part sur le collet (7) saillant de l'extrémité du piston. 6. Syringe according to one of claims 1 to 5, wherein before use, one end (11) of the piston (13,27) protrudes outside the body (16,24) and is provided with a collar ( 7) terminal projecting radially around the periphery of said end, characterized in that it is provided with a removable member for holding the piston in this position, for example a split crown (12) enveloping the end (11) of the piston and bearing, on the one hand on the end part of the body and on the other hand on the collar (7) projecting from the end of the piston.
PCT/FR1988/000206 1987-04-10 1988-04-28 Non-reusable syringe WO1989010152A1 (en)

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Application Number Priority Date Filing Date Title
FR8705112A FR2613628A1 (en) 1987-04-10 1987-04-10 SINGLE USE SYRINGE

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WO1989010152A1 true WO1989010152A1 (en) 1989-11-02

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US5019045A (en) * 1988-03-28 1991-05-28 Lee Sang D Hypodermic syringe with a locking needle assembly and syringe combination
SE464963B (en) * 1988-12-14 1991-07-08 Gudmar Olovson SYRINGE
SU1725913A1 (en) * 1989-05-16 1992-04-15 С, М. Мазурик и А. Н. Соколов Single use syringe
US5259840A (en) * 1991-09-03 1993-11-09 Boris Craig R Locking syringe
FR2712497B1 (en) * 1993-10-13 1996-04-19 Ben Jilani Elm Barki Salah Edd Single-use, non-reusable, single-chamber syringe, provided with a perforating means and at least one means creating a chamber effect by suction and discharge of air.
US6972006B2 (en) 2002-09-18 2005-12-06 G6 Science Corp. Syringe device with resistive ridges and methods of use
ATE518557T1 (en) 2008-07-08 2011-08-15 Kunststofftechnik Waidhofen An Der Thaya Gmbh CANNULA PROTECTION AND DISPOSABLE SYRINGE SYSTEM
DE102009023334A1 (en) 2009-05-29 2010-12-02 Lts Lohmann Therapie-Systeme Ag Cylinder-piston unit suitable for storage of injection solutions for a needle-free injector and method for the bubble-free automatic or manual filling of the cylinder-piston unit, even at atmospheric pressure
DE102009023335A1 (en) 2009-05-29 2010-12-02 Lts Lohmann Therapie-Systeme Ag Piston-cylinder-unit for needle-free one-way injector, has chamber part formed by piston, and another chamber part closed by another piston and provided with channel, where former chamber part is separated from latter part

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GB2015883A (en) * 1978-03-10 1979-09-19 Tulcea Sa Disposable syringe
FR2571261A1 (en) * 1984-10-09 1986-04-11 Avare Georges Syringe of the disposable type for injection or taking samples from a human or animal and relating syringe body

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FR2654628A1 (en) * 1989-11-23 1991-05-24 Patrice Elfandi INJECTION MATERIAL (SYRINGE AND NEEDLE) UNUSABLE AFTER USE.
WO1991008011A1 (en) * 1989-11-23 1991-06-13 Patrice Elfandi Injection material (syringe and needle) unusable after a single use

Also Published As

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