FR2506161A1 - Self:injection syringe with compartments for specific liquids - is spring:loaded first to penetrate patient then inject liq.(s), is automatic - Google Patents

Self:injection syringe with compartments for specific liquids - is spring:loaded first to penetrate patient then inject liq.(s), is automatic Download PDF

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Publication number
FR2506161A1
FR2506161A1 FR8110043A FR8110043A FR2506161A1 FR 2506161 A1 FR2506161 A1 FR 2506161A1 FR 8110043 A FR8110043 A FR 8110043A FR 8110043 A FR8110043 A FR 8110043A FR 2506161 A1 FR2506161 A1 FR 2506161A1
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France
Prior art keywords
syringe
needle
injection
spring
compartments
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Legal status (The legal status 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 status listed.)
Granted
Application number
FR8110043A
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French (fr)
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FR2506161B3 (en
Inventor
Alain Rochelet
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ALSETEX ARMEMENT
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ALSETEX ARMEMENT
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Priority to FR8110043A priority Critical patent/FR2506161A1/en
Priority to FR8200827A priority patent/FR2519866B2/en
Publication of FR2506161A1 publication Critical patent/FR2506161A1/en
Application granted granted Critical
Publication of FR2506161B3 publication Critical patent/FR2506161B3/fr
Granted legal-status Critical Current

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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
    • A61M5/178—Syringes
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M5/2066—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically comprising means for injection of two or more media, e.g. by mixing
    • 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
    • A61M2005/1787—Syringes for sequential delivery of fluids, e.g. first medicament and then flushing liquid
    • 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
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M2005/206—With automatic needle insertion
    • 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
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M2005/2073—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically preventing premature release, e.g. by making use of a safety lock
    • 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
    • A61M5/32—Needles; 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
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3245—Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3256—Constructional features thereof, e.g. to improve manipulation or functioning having folding ring sections
    • 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
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M5/2033—Spring-loaded one-shot injectors with or without automatic needle insertion

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  • 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

The syringe is spring-loaded with compartments filled and its injection needle retracted within the body of the syringe. A mechanical release is actuated to initiate an automatic, two-stage, injection cycle: in stage 1 the needle is thrust forward to penetrate the body of the patient and in stage 2 the specific liqs. from each of the compartments are injected through the needle into the patient. Pref. liq. to be injected is contained in a cylindrical passage immediately behind the inlet end of the needle. The passage contains at least two axially slidable, spaced sealing pistons to divide the passage into compartments for specific liqs. Release of a first stage, preloaded, needle advancing spring displaces the whole of the passage within the syringe. This is automatically followed by release a second, preloaded, injection spring which drives axially forward all sealing pistons to empty liq. from all compartments through the needle. The operation requires no physical effort so that a sick patient can immediately self-inject, even through layers of clothing.

Description

La présente invention concerne une seringue auto-injectante à corps unique, du type comprenant au moins deux compartiments renfermant chacun un liquide spécifique. Une telle seringue est utilisable, en cas d'interventionurgente, par le patient luimême, sans effort physique, ni précaution particulière, éventuellement au travers des vêtements. The present invention relates to a self-injecting syringe with a single body, of the type comprising at least two compartments each containing a specific liquid. Such a syringe can be used, in the event of an emergency intervention, by the patient himself, without physical effort, or any particular precaution, possibly through clothing.

L'invention concerne une seringue auto-injectante de ce type qui se caractérise en ce quelle comporte un dispositif mécanique susceptible de provoquer successivement et automatiquement la pénétration de l'aiguille d'injection dans le corps du patient, puis l'injection à travers l'aiguille des liquides spécifiques contenus dans les compartiments. The invention relates to a self-injecting syringe of this type which is characterized in that it comprises a mechanical device capable of causing successively and automatically the penetration of the injection needle into the patient's body, then the injection through the needle for specific liquids contained in the compartments.

La seringue comprend à l'intérieur d'une enveloppe tubulaire un corps de seringue tubulaire portant ladite aiguille d'injection à son extrémité antérieure, et au moins deux joints coulissants qui définissent à l'intérieur du corps de seringue lesdits compartiments, ledit dispositif mécanique étant constitué par deux pièces coulissantes montées à l'arrière du corps de seringue et maintenues en position rétractée par des moyens de retenue à l'encontre de la force de moyens ressorts précontraints, lesdites pièces étant susceptibles d'être libérées l'une après l'autre, la première pour eniatnerlecorps de seringue dans le sens pour lequel l'aiguille pénètre dans le corps du patient, et la seconde pour ed2manerensuite les joints coulissants lesquels refoulent les liquides spécifiques à travers l'aiguille d'injection. The syringe comprises inside a tubular casing a tubular syringe body carrying said injection needle at its anterior end, and at least two sliding seals which define inside said syringe body, said compartments, said mechanical device consisting of two sliding parts mounted at the rear of the syringe body and held in the retracted position by retaining means against the force of prestressed spring means, said parts being capable of being released one after the 'the other, the first to initiate the syringe body in the direction in which the needle enters the patient's body, and the second to edit the sliding joints which deliver specific liquids through the injection needle.

Selon une autre áractéristique de l'invention, des moyens sont prévus pour retenir en position avant le corps de seringue et l'aiguille à la fin de la phase piqûre. De cette manière, l'aiguille dtinjection ne peut se rétracter sous l'action de la pression des liquides injectés. According to another characteristic of the invention, means are provided for retaining in position before the syringe body and the needle at the end of the injection phase. In this way, the injection needle cannot retract under the action of the pressure of the injected liquids.

Avantageusement, pendant le stockage, l'aiguille d'injection est conservée en ambiance stérile à l'intérieur d'un obturateur étanche déformable en forme de soufflet, s'appuyant sur les faces antérieures de l'enveloppe et du corps de seringue
Un mode de réalisation particulier sera décrit à présent, à titre d'exemple non limitatif, en regard des figures 1 à 3 qui représentent respectivement des vues en coupe axiale de la seringue dans sa position de stockage, à la fin de la phase de pitre de l'aiguille et à la fin de la phase d'injection.Advantageously, during storage, the injection needle is kept in a sterile environment inside a deformable sealed obturator in the form of a bellows, resting on the anterior faces of the envelope and of the syringe body.
A particular embodiment will now be described, by way of nonlimiting example, with reference to FIGS. 1 to 3 which respectively represent views in axial section of the syringe in its storage position, at the end of the clown phase of the needle and at the end of the injection phase.

La seringue représentée sur les figures comprend une enveloppe tubulaire 10 dans laquelle sont montés coulissants d'une part, un corps de seringue tubulaire 12 muni à une extrémité d'une aiguille d'injection 14, et d'autre part, un dispositif mécanique 16 destiné à provoquer successivement et automatiquement la pén#tra- tien de l'aiguille dans le corps du patient et l'inJec- tion. The syringe shown in the figures comprises a tubular casing 10 in which are slidably mounted on the one hand, a tubular syringe body 12 provided at one end with an injection needle 14, and on the other hand, a mechanical device 16 intended to cause successively and automatically the penetration of the needle into the patient's body and the injection.

Le corps de seringue 12 est fermé & l'extr#mité 17 qui porte l'aiguille 14 et ouverte à l'autre extr#uité. Dans ledit corps sont montés coulissants de façon étanche trois joints 18, 20 et 22 en forme de disques qui définissent avec le corps de seringue trois compartiments 24, 26, 28 contenant chacun un liquide spécifique à injecter. The syringe body 12 is closed at the end 17 which carries the needle 14 and open at the other end. In said body there are slidingly mounted three seals 18, 20 and 22 in the form of discs which define with the syringe body three compartments 24, 26, 28 each containing a specific liquid to be injected.

Il va de soi que le corps de seringue peut aussi bien comporter un, deux ou plus de trois compartiments contenant chacun un liquide, selon l'utilisation particulière de la seringue. It goes without saying that the syringe body can also include one, two or more than three compartments each containing a liquid, depending on the particular use of the syringe.

La paroi latérale du corps de seringue présente, des rainures longitudinales 32 et 30, à travers leoquellas le liquide de chaque compartiment peut migrer dans le compartiment suivant lorsque les joints se trouvent en regard desdites rainures. The side wall of the syringe body has, longitudinal grooves 32 and 30, through leoquellas the liquid from each compartment can migrate into the next compartment when the seals are opposite said grooves.

L'aiguille 14 est rigidement solidaire d'un embout tubulaire 34 faisant saillie sur le fond 17 du corps de seringue et elle est conservée en ambiance stérile à l'intérieur d'un obturateur étanche déformable 36 en forme de soufflet, dont la paroi arrière 38 est emmanchée autour de l'embout 34 et s'appuie contre ledit fond 17 et dont la paroi avant 40 s'applique contre le fond 42 de l'enveloppe, obturant ainsi un orifice axial 44 percé dans ledit fond. The needle 14 is rigidly secured to a tubular end piece 34 protruding from the bottom 17 of the syringe body and it is kept in a sterile environment inside a deformable sealed shutter 36 in the form of a bellows, the rear wall of which 38 is fitted around the end piece 34 and bears against said bottom 17 and the front wall 40 of which bears against the bottom 42 of the casing, thereby closing an axial orifice 44 drilled in said bottom.

Le corps de seringue 12 et l'obturateur étanche déformable 36 sont maintenus fixes pendant le stockage au moyen d'une goupille radiale 46 traversant la paroi de l'enveloppe 10 et pénétrant dans un trou prévu dans la paroi arrière 38 de l'obturateur étanche déformable. The syringe body 12 and the deformable sealed obturator 36 are kept fixed during storage by means of a radial pin 46 passing through the wall of the envelope 10 and penetrating into a hole provided in the rear wall 38 of the sealed obturator. deformable.

Dans la partie antérieure de la seringue auto injectant se trouve un ressort d'aiguille 48, dont le rible est d'empêcher le corps de seringue 12 de se déplacer vers l'avant, en cas de chute intempestive de la seringue après le retrait de la goupille 46. In the anterior part of the self-injecting syringe is a needle spring 48, the aim of which is to prevent the syringe body 12 from moving forward, in the event of an inadvertent fall of the syringe after the withdrawal of the pin 46.

Le dispositif mécanique 16 comprend une pièce tubulaire de manoeuvre 50, montée coulissante à l'intérieur de l'enveloppe 10 et dont l'extrémité ouverte antérieure est maintenue en appui sur la face arrière 52 du corps de seringue au moyen d'un ressort de pitre 54 à l'état comprimé, s'appuyant sur un épaulement annulaire 55 de la pièce de manoeuvre 50 et sur une pièce d'appui tubulaire 56 fixée à l'extrémité arrière de l'enveloppe 10. The mechanical device 16 comprises a tubular operating part 50, slidably mounted inside the casing 10 and the anterior open end of which is held in abutment on the rear face 52 of the syringe body by means of a spring. pitre 54 in the compressed state, resting on an annular shoulder 55 of the operating part 50 and on a tubular support part 56 fixed to the rear end of the casing 10.

Le ressort de piqûre assure la pénétration de l'aiguille 14 dans l'organe du patient.The puncture spring ensures the penetration of the needle 14 into the patient's organ.

A l'intérieur de la pièce de manoeuvre 50 est monté coulissant un piston d'injection 58 dont l'extrémité antérieure s'adapte avec jeu dans le corps de seringue. Entre le piston d'injection 58 et le fond 60 de la pièce de manoeuvre 50 est disposé un ressort d'injection 62 à l'état comprimé qui assure l'expulsion des liquides 24 hors du corps de seringue 12 à travers l'aiguille 14, comme on le verra par la suite. Inside the operating part 50 is slidably mounted an injection piston 58 whose anterior end adapts with play in the syringe body. Between the injection piston 58 and the bottom 60 of the operating part 50 is disposed an injection spring 62 in the compressed state which ensures the expulsion of the liquids 24 out of the syringe body 12 through the needle 14 , as we will see later.

Le piston d'injection 58 est pourvu d'une tige de piston 64 qui traverse le fond 60 de la pièce de manoeuvre 50 et la pièce d'appui 56. The injection piston 58 is provided with a piston rod 64 which passes through the bottom 60 of the operating part 50 and the support part 56.

Au montage, la position du piston d'injection 58 est fixée à l'intérieur de la pièce de manoeuvre par des billes 66 qui reposent dans une gorge annulaire 68 pratiquée sur la surface cylindrique du piston d'injection 58. En position de stockage, les billes 66 font saillie dans des orifices 70 percés à travers la paroi de la pièce de manoeuvre et y sont maintenues par l'alésage 72 de l'enveloppe 10. During assembly, the position of the injection piston 58 is fixed inside the operating part by balls 66 which rest in an annular groove 68 formed on the cylindrical surface of the injection piston 58. In the storage position, the balls 66 project into holes 70 drilled through the wall of the operating part and are held there by the bore 72 of the casing 10.

Dans cette position, le piston d'injection 58 est donc empoché de coulisser à l'intérieur du corps de seringue 12.In this position, the injection piston 58 is therefore prevented from sliding inside the syringe body 12.

En aval des billes 66, l'alésage 72 présente une gorge circulaire 74 dans laquelle les billes peuvent s'escamoter lorsque la pièce de manoeuvre est enfoncée. Downstream of the balls 66, the bore 72 has a circular groove 74 in which the balls can retract when the operating part is pressed.

Le mécanisme de déclenchement de la seringue auto-injectante est situé à l'arrière de celle-ci et comprend un bouton-poussoir 76 rendu solidaire, au moyen d'un circlip 78, d'un couvercle 80 fixé à l'extrémité arrière de l'enveloppe 10. Un ressort de poussoir 82, s'appuyant sur la pièce d'appui 56 et sur le bouton-poussoir, maintient ce dernier en position de montage lorsque le circlip est enlevé. The triggering mechanism of the self-injecting syringe is located at the rear of the latter and comprises a push button 76 made integral, by means of a circlip 78, with a cover 80 fixed to the rear end of the casing 10. A push spring 82, pressing on the support piece 56 and on the push button, keeps the latter in the mounting position when the circlip is removed.

Le piston d'injection 58 est immobilisé en position de stockage au moyen de billes ou analogues 84 logées en partie dans une gorge circulaire 86 formée sur la surface cylindrique de la tige de piston 64 et en partie dans des orifices 88 ménagés dans la partie arrière de la pièce d'appui 56. The injection piston 58 is immobilized in the storage position by means of balls or the like 84 housed partly in a circular groove 86 formed on the cylindrical surface of the piston rod 64 and partly in orifices 88 formed in the rear part of the support piece 56.

Ces billes sont maintenues par l'alésage 90 du bouton-poussoir 76. Dans cette position, la pièce d'appui 56 et la tige 64 du piston d'injection 58 sont rendues solidaires, et ce dernier est donc immobilisé en position de stockage. L'alésqe 90 du bouton-poussoir 76 présente, en amont des orifices 88 de la pièce d'appui 56, une gorge circulaire 92 dans laquelle les billes 84 peuvent s'escamoter lorsque le bouton poussoir est enfoncé.These balls are held by the bore 90 of the push button 76. In this position, the support piece 56 and the rod 64 of the injection piston 58 are made integral, and the latter is therefore immobilized in the storage position. The bore 90 of the push button 76 has, upstream of the orifices 88 of the support piece 56, a circular groove 92 in which the balls 84 can be retracted when the push button is pressed.

La seringue auto-injectante selon l'invention fonctionne comme suit
Après avoir retiré le circlip 78 et la goupille 46, on applique la face antérieure 42 de la seringue à l'endroit du corps où l'on veut faire l'injection.The self-injecting syringe according to the invention operates as follows
After having removed the circlip 78 and the pin 46, the anterior face 42 of the syringe is applied to the location of the body where the injection is to be made.

On appuie sur le bouton-poussoir 76. Le ressort de poussoir 82 est comprimé pendant que les billes 84 se dégagent de l'alésage 90 du bouton-poussoir 76 et viennent se loger dans la gorge circulaire 86 du bouton-poussoir. La tige 64 du piston d'injection 58 est alors libérée. The push button 76 is pressed. The push spring 82 is compressed while the balls 84 are released from the bore 90 of the push button 76 and are received in the circular groove 86 of the push button. The rod 64 of the injection piston 58 is then released.

Sous l'action du ressort de piqare 54, ltensemble constitué par la pièce de manoeuvre 50 et le corps de seringue 12 est poussé vers l'avant en comprimant le ressort d'aiguille 48. L'aiguille 14 pénètre alors dans le corps du patient après avoir travers la paroi avant 40 de l'obturateur étanche déformable 36. Under the action of the piqare spring 54, the assembly constituted by the operating part 50 and the syringe body 12 is pushed forward by compressing the needle spring 48. The needle 14 then enters the patient's body after passing through the front wall 40 of the deformable waterproof shutter 36.

A la fin de ce mouvement, l'ensemble constitué par la pièce coulissante de manoeuvre 50 et le corps de seringue 12 est arrivé à la position montrée par la figure 2. Les billes 66 se trouvent en face de la gorge circulaire 74 et la liaison entre la pièce de manoeuvre 50 et le piston d'injection 58 cesse d'exister. At the end of this movement, the assembly constituted by the sliding maneuvering part 50 and the syringe body 12 has arrived at the position shown in FIG. 2. The balls 66 are located opposite the circular groove 74 and the connection between the operating part 50 and the injection piston 58 ceases to exist.

Dans la position montrée par la figure 2, à la fin de la phase de piqûre le corps de seringue 12 est immobilisé en position avant par les billes 66 qui se trouvent emprisonnées entre la surface cylindrique du piston d'injection 58 et le fond de la gorge intérieure 74 de l'enveloppe 10 de la seringue. In the position shown in FIG. 2, at the end of the puncture phase, the syringe body 12 is immobilized in the front position by the balls 66 which are trapped between the cylindrical surface of the injection piston 58 and the bottom of the inner groove 74 of the envelope 10 of the syringe.

Le ressort d'injection 62 se détend alors et pousse vers l'avant le piston d'injection 58. Sous cette pression, les joints 18, 20 et 22 se déplacent vers l'avant. Le liquide du compartiment 28 commence à etre éjecté à travers l'aiguille 14. Lorsque les joints 20 et 22 arrivent en face des rainures longitudinales 30 et 32, le liquide du compartiment 24 migre dans le compartiment 26 alors que le liquide du compartiment 26 migre dans le compartiment 28. The injection spring 62 then relaxes and pushes the injection piston 58 forward. Under this pressure, the seals 18, 20 and 22 move forward. The liquid in compartment 28 begins to be ejected through the needle 14. When the seals 20 and 22 arrive opposite the longitudinal grooves 30 and 32, the liquid in compartment 24 migrates into compartment 26 while the liquid in compartment 26 migrates in compartment 28.

Quand le compartiment 24 est vide, le joint 18 est appliqué sur le joint 20. Le liquide du compartiment 26 migre complètement dans le compartiment 28#, jusqu'au moment où les trois joints 18, 20 et 22 sont en contact. Le liquide restant dans le compartiment 28 est alors éjecté à travers l'aiguille 14. When the compartment 24 is empty, the seal 18 is applied to the seal 20. The liquid in the compartment 26 migrates completely into the compartment 28 #, until the three seals 18, 20 and 22 are in contact. The liquid remaining in the compartment 28 is then ejected through the needle 14.

La position finale des joints 18, 20 et 22 est montrée à la figure 3. The final position of the seals 18, 20 and 22 is shown in Figure 3.

On voit que l'ensemble de l'opération s'est effectué en deux phases successives et distinctes en premier lieu, la phase de piqûre sous l'action du ressort de pitre 54 et en deuxième lieu, la phase d'injection sous l'action du ressort d'injection 62. We see that the whole operation was carried out in two successive and distinct phases first, the puncture phase under the action of claw spring 54 and secondly, the injection phase under the action of the injection spring 62.

On notera également qu'en fin de la phase de piqare, le corps de seringue 12 est verrouillé à l'avant par les billes 66. L'aiguille 14 ne peut donc pas se rétracter sous l'effet de la pression des liquides injectés. It will also be noted that at the end of the piqare phase, the syringe body 12 is locked at the front by the balls 66. The needle 14 cannot therefore retract under the effect of the pressure of the liquids injected.

Une autre caractéristique réside dans la présence de l'obturateur étanche déformable qui permet de conserver l'aiguille en ambiance stérile jusqutau moment de l'utilisation.  Another characteristic resides in the presence of the deformable sealed obturator which makes it possible to keep the needle in a sterile environment until the moment of use.

Claims (11)

REVENDICATIONS 1.- Seringue auto-injectante, du type comportant au moins deux compartiments renfermant chacun un liquide spé cifique à injecter, caractérisée en ce qu'elle comporte un dispositif mécanique 50, 64 susceptible de provoquer successivement et automatiquement la pénétration de l'ai- guille d'injection 14 dans le corps du patient, puis llin- section à travers l'aiguille des liquides spécifiques contenus dans les compartiments 24, 26, 28. 1.- Self-injecting syringe, of the type comprising at least two compartments each containing a specific liquid to be injected, characterized in that it comprises a mechanical device 50, 64 capable of successively and automatically causing penetration of the a- injection needle 14 into the patient's body, then section through the needle of the specific liquids contained in the compartments 24, 26, 28. 2.- Seringue selon la revendication 1, caractérisée en ce qu'elle comprend à l'intérieur d'une enveloppe tubulaire 10 un corps de seringue tubulaire 12 portant ladite aiguille d'injection 14 à son extrémité anterieure, et au moins deux joints coulissants 18, 20, 22 qui définissent à l'intérieur du corps de seringue lesdits compartiments 24, 26, 28, ledit dispositif mécanique étant constitué par deux pièces coulissantes 50, 64 montées à l'arrière du corps de seringue et maintenues en position rétractée par des moyens de retenue 66, 84 à l'encontre de la force de moyens ressorts précontraints 54, 62, lesdites pièces étant susceptibles d'été libérées l'une après l'autre, la première 50 pour entraîner le corps de seringue 12 dans le sens pour lequel leaigaills pénètre dans le corps du patient, et la seconde 64 pour entraîner ensuite les joints coulissants lesquels refoulent les liquides spécifiques à travers l'aiguille d'injection. 2. A syringe according to claim 1, characterized in that it comprises, inside a tubular casing 10, a tubular syringe body 12 carrying said injection needle 14 at its anterior end, and at least two sliding seals 18, 20, 22 which define inside said syringe body said compartments 24, 26, 28, said mechanical device consisting of two sliding parts 50, 64 mounted at the rear of the syringe body and held in the retracted position by retaining means 66, 84 against the force of prestressed spring means 54, 62, said parts being susceptible of being released one after the other, the first 50 to drive the syringe body 12 in the direction in which leaigaills enters the patient's body, and the second 64 to then drive the sliding seals which deliver specific liquids through the injection needle. 3.- Seringue selon l'une des revendications 1 et 2, caractérisée en ce que pendant le stockage > l'aiguille 14 est conservee en ambiance stérile à l'intérieur d'un obturateur étanche déformable 36 pourvu d'une paroi arrière 38 appliquée contre la face antérieure 17 du corps de seringue et d'une paroi avant 40 qui s'applique contre la paroi antérieure 42 de l'enveloppe, obturant ainsi un orifice axial 44 par lequel l'aiguille 14 est destinée à faire saillie. 3.- Syringe according to one of claims 1 and 2, characterized in that during storage> the needle 14 is kept in a sterile atmosphere inside a deformable sealed obturator 36 provided with a rear wall 38 applied against the anterior face 17 of the syringe body and of a front wall 40 which is applied against the anterior wall 42 of the envelope, thus closing off an axial orifice 44 through which the needle 14 is intended to protrude. 4.- Seringue selon l'une des revendications précédentes, caractérisée en ce que le corps de seringue 12 et 1'obturateur déformable 36 sont maintenus fixes pendant le stockage au moyen d'une goupille radiale 46. 4. Syringe according to one of the preceding claims, characterized in that the syringe body 12 and the deformable obturator 36 are kept fixed during storage by means of a radial pin 46. 5.- Seringue selon la revendication 1, caractérisée en ce que le dispositif mécanique 16 comprend, d'une part, une pièce de manoeuvre 50 montée coulissante à l'intérieur de l'enveloppe 10 et dont l'extrémité antérieure est maintenue en appui sur la face arrière 52 du corps de seringue au moyen d'un ressort de piqfire 54 à l'état comprimé, s'appuyant sur la pièce de manoeuvre 50 et sur une pièce d'appui tubulaire 56 fixée à l'extrémité arrière de l'enveloppe 10, et d'autre part, un piston d'injection 58 monté coulissant dans la pièce de manoeuvre 50 et dont ltextrémité antérieure s'adapte avec jeu dans le corps de seringue 12, un ressort dtinjection 62 à l'état comprimé qui assure l'expulsion des liquides 24 hors du corps de seringue 12 à travers l'aiguille 14 étant disposé entre le piston d'injection 58 et la pièce de manoeuvre 50, des moyens de solidarisation respectifs 66 et 84 étant prévus pour solidariser en mouvement, d'une part la pièce de manoeuvre 50 et le piston d'injection 58, et d'autre part, le piston d'injection et la pièce d'appui 56. 5. A syringe according to claim 1, characterized in that the mechanical device 16 comprises, on the one hand, an operating part 50 slidingly mounted inside the casing 10 and the front end of which is held in abutment on the rear face 52 of the syringe body by means of a piqfire spring 54 in the compressed state, resting on the operating part 50 and on a tubular support part 56 fixed to the rear end of the envelope 10, and on the other hand, an injection piston 58 slidably mounted in the operating part 50 and the anterior end of which adapts with play in the syringe body 12, an injection spring 62 in the compressed state which expels the liquids 24 from the syringe body 12 through the needle 14 being disposed between the injection piston 58 and the operating part 50, respective securing means 66 and 84 being provided for securing in movement, on the one hand the operating part 50 and the injection piston 58 , and on the other hand, the injection piston and the support piece 56. 6.- Seringue selon la revendication 5, caractérisée en ce que les moyens de solidarisation de la pièce de manoeuvre 50 et du piston d'injection 58 sont constitués par au moins une bille 66 reçue en partie dans une gorge circulaire 68 pratiquée sur la surface cylindrique du piston d'injection 58 et en partie dans un orifice 70 percé dans la paroi tubulaire de la pièce de manoeuvre, la ou les billes y étant maintenue par l'alésage 72 de l'enveloppe 10. 6.- syringe according to claim 5, characterized in that the means for securing the operating part 50 and the injection piston 58 are constituted by at least one ball 66 received in part in a circular groove 68 formed on the surface cylindrical of the injection piston 58 and partly in an orifice 70 drilled in the tubular wall of the operating part, the ball or balls being held there by the bore 72 of the casing 10. 7.- Seringue selon la revendication 6, caractérisée en ce qu'ai aval des billes 66, 1'alésage 72 présente une gorge circulaire 74 dans laquelle les billes peuvent s'escamoter lorsque la pièce de manoeuvre est enfoncée, désolidarisant ainsi le piston d'injection de la pièce de manoeuvre 50.  7.- Syringe according to claim 6, characterized in that downstream of the balls 66, the bore 72 has a circular groove 74 in which the balls can be retracted when the operating part is pressed, thus separating the piston d injection of the operating part 50. 8.- Seringue selon la revendication 7, caractérisée en ce qu'à la fin de la phase piqtre, les billes 66, reçus dans la gorge 74 et dans l'orifice 70 de la pièce de manoeuvre, verrouillent on position avant le corps de seringue et l'aiguille. 8.- Syringe according to claim 7, characterized in that at the end of the puncture phase, the balls 66, received in the groove 74 and in the orifice 70 of the maneuvering piece, are locked in position before the body of syringe and needle. 9.- Seringue selon la revendication 5, caractérisée en ce que les moyens de solidarisation du piston d'injection 58 et de la pièce d'appui 56 sont constitués par au moins une bille 84 reçue en partie dans une gorge circulaire 86 formée sur la surface cylindrique d'une tige de piston 64 qui fait saillie & arrière du piston d'injection 58 et qui traverse l'alésage de la pièce d'appui tubulaire 56, et en partie dans un orifice 88 percé dans la paroi tubulaire de la pièce d'appui 56, la ou les billes y étant maintenue par l'alésage 90 d'un bouton-poussoir creux 76 monté à l'extrémité arrière de l'enveloppe 10 et en ce qu'en amont des orifices 88, l'alésage 90 du boutonpoussoir présente une gorge circulaire 92 dans laquelle les billes 84 peuvent s'escamoter lorsque le bouton-poussoir est enfoncé désolidarisant ainsi le piston d'injection 58 de la pièce d'appui 56. 9. A syringe according to claim 5, characterized in that the means for securing the injection piston 58 and the support piece 56 consist of at least one ball 84 partly received in a circular groove 86 formed on the cylindrical surface of a piston rod 64 which projects & rear of the injection piston 58 and which passes through the bore of the tubular bearing part 56, and partly in an orifice 88 drilled in the tubular wall of the part support 56, the ball or balls being held there by the bore 90 of a hollow push button 76 mounted at the rear end of the casing 10 and in that upstream of the orifices 88, the bore 90 of the push button has a circular groove 92 in which the balls 84 can be retracted when the push button is pressed, thereby separating the injection piston 58 from the support piece 56. 10.- Seringue selon la revendication 9, caractérisé, en ce que pendant le stockage, le bouton-poussoir 76 est rendu solidaire d'un couvercle 80, fixé à l'extrémité arrière de l'enveloppe 10, et en ce qu'un ressort de poussoir 82, disposé entre le boutonpoussoir 76 et la pièce d'appui 56, est prévu pour maintenir le bouton-poussoir en position sortie, lorsque le circlip est enlevé. 10.- Syringe according to claim 9, characterized in that during storage, the push button 76 is made integral with a cover 80, fixed to the rear end of the envelope 10, and in that a push spring 82, disposed between push button 76 and support piece 56, is provided to hold the push button in the extended position when the retaining ring is removed. 11.- Seringue selon l'une des revendications précédentes, caractérisée en ce que dans la partie antérieure de la seringue est disposé un ressort d'aiguille 48 destiné à empêcher le corps de seringue 12 de se déplacer vers l'avant en cas de chute de la seringue, après retrait de la goupille 46.  11.- Syringe according to one of the preceding claims, characterized in that in the front part of the syringe is disposed a needle spring 48 intended to prevent the syringe body 12 from moving forward in the event of a fall of the syringe, after removal of the pin 46.
FR8110043A 1981-05-20 1981-05-20 Self:injection syringe with compartments for specific liquids - is spring:loaded first to penetrate patient then inject liq.(s), is automatic Granted FR2506161A1 (en)

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FR8110043A FR2506161A1 (en) 1981-05-20 1981-05-20 Self:injection syringe with compartments for specific liquids - is spring:loaded first to penetrate patient then inject liq.(s), is automatic
FR8200827A FR2519866B2 (en) 1981-05-20 1982-01-20 SELF-INJECTING SYRINGE ALLOWING THE INJECTION OF PRODUCTS AT TWO DIFFERENT DEPTHS

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FR8110043A FR2506161A1 (en) 1981-05-20 1981-05-20 Self:injection syringe with compartments for specific liquids - is spring:loaded first to penetrate patient then inject liq.(s), is automatic

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FR2506161B3 FR2506161B3 (en) 1984-03-30

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