WO1985000524A1 - Seringue d'injection - Google Patents

Seringue d'injection Download PDF

Info

Publication number
WO1985000524A1
WO1985000524A1 PCT/EP1984/000216 EP8400216W WO8500524A1 WO 1985000524 A1 WO1985000524 A1 WO 1985000524A1 EP 8400216 W EP8400216 W EP 8400216W WO 8500524 A1 WO8500524 A1 WO 8500524A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
syringe
syringe according
stroke
cup
Prior art date
Application number
PCT/EP1984/000216
Other languages
German (de)
English (en)
Inventor
Peter MÄRZ
Jürgen POSTEL
Original Assignee
Maerz Peter
Postel Juergen
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 Maerz Peter, Postel Juergen filed Critical Maerz Peter
Publication of WO1985000524A1 publication Critical patent/WO1985000524A1/fr

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
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M5/31513—Piston constructions to improve sealing or sliding
    • 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
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M2005/31521—Pistons with a forward extending skirt at their front end

Definitions

  • the invention relates to an injection syringe according to the preamble of claim 1.
  • an injection syringe of this type is known from DE-OS 20 25 379.
  • the cup-shaped seal is made in one piece with the syringe plunger from a thermoplastic material such as polystyrene and has two sealing flanges which are arranged at an axial distance from one another a peripheral bead protruding from the piston. If one considers this square bead as the pot base, then one sealing flange extends in the manner of a pot edge in the direction of the spray stroke and the other sealing flange extends in the opposite direction, ie in the direction of the suction stroke.
  • the two sealing flanges have a common, concavely shaped lateral surface, and the square bead forming the pot base should be deformable in such a way that it bends somewhat backwards during the spray stroke due to the counterpressure and then the front sealing flange engages with the Wall of the syringe barrel arrives, while it tilts slightly during the suction stroke, so that the rear sealing flange should then come into engagement with the wall of the syringe barrel.
  • Such a seal design is comparatively complicated, and such a design does not appear to be suitable for applications which require sensitive actuation of the syringe in a precisely predictable and repeatable manner. Due to the convex design of the casing of the pot edge part of the seal, if the design is too strong, the resistance to be expected is too high, while a thinner design of the pot edge increases the risk of the cover being unwanted
  • FIG. 2 261 631 Another example of a sealing arrangement of an injection syringe is shown in DE-OS 2 261 631.
  • the seal is formed by a plug-like, but stepped sealing body which can be snapped into place at the front end of the syringe plunger.
  • an annular sealing lip which seals the wall of the syringe barrel sits on a compact ring part of the sealing body.
  • Such a design would require expensive precision work in order to make the syringe easy to predict, as is required for certain applications , to ensure.
  • the simultaneous use as a suction seal also presupposes excessive press-in and thus causes undesirable frictional forces.
  • hypodermic syringes to rinse wounds and body cavities, e.g. Bladder irrigation, flushing of the ureters, patency test of the fallopian tubes, flushing the tears in the eye and the like.
  • the object of the present invention is to take precautions for an injection syringe of the type in question, in order to ensure that the syringe is made of plastic with better smoothness, as is required, for example, for the loss-off resistance method.
  • the arrangement according to the characterizing part of claim 1 is made according to the invention, starting from an injection syringe of the initially known type.
  • the invention unexpectedly allows an accurately predictable, even when using plastic syringes and seals manufactured as a cheap mass part
  • Claim 2 characterizes an advantageous embodiment, which also allows the seal to be connected to the plastic syringe plunger by a simple snap connection.
  • the rigid design of the bottom of the pot ensures that the conical rim of the pot shows a precisely predictable operating behavior, which is not affected by changes in the position of the bottom of the pot.
  • Claim 5 characterizes a further advantageous embodiment, in which the cup-shaped seal can be designed particularly simply in the manner of a truncated cone shell.
  • the cross-section of this truncated cone shell, which represents the pot edge, can either be the same throughout or can taper to the front.
  • the claim 6 characterizes advantageous material information in connection with a favorable design rule.
  • Claim 8 characterizes an advantageous development of the invention with an additional seal, which acts as an intake seal. It is precisely the arrangement of such an additional seal that makes it possible to design the seal that is effective during the spray stroke in a particularly smooth manner, because it does not need to have the stability required for a suction stroke.
  • Spray stroke can in no way affect.
  • Fig. 1 shows schematically an injection syringe with a first seal acting on the spray stroke and a second seal acting on the suction stroke;
  • Fig. 2 shows a schematic comparison of two cup-shaped seals; at the top in the position fitted in the syringe barrel, and at the bottom in a slightly spread position; the representation is not to scale;
  • FIG. 3 shows another injection syringe with different design options for the cup-shaped seal on the left side and on the right side of the figure;
  • FIG. 4 shows a further developed embodiment of an injection syringe which has an actuating device for transferring an additional seal between an active and an inactive position
  • FIG. 1 shows another embodiment of an actuating device for an additional seal.
  • 6 shows a preferred form of seal to scale.
  • the illustration in FIG. 1 is purely schematic and shows an injection syringe with syringe barrel 1 and syringe plunger 3. The usual one is located on the syringe barrel
  • OMPI Male conical attachment 5 to i ⁇ connection of an injection cannula The syringe barrel and syringe plunger can both be made of plastic.
  • the syringe plunger At its rear end, the syringe plunger has an actuating part 7 for engaging a finger of the operator.
  • a stop 9 which is only indicated schematically, prevents the syringe plunger from sliding out of the syringe barrel undesirably.
  • pot-shaped seal 11 which has a pot edge part 13 and a pot base part 15.
  • the pot bottom part 15 has a center hole, by means of which the
  • the material of the cup-shaped seal is a soft material in the manner of rubber, flexible plastic or the like.
  • the top edge of the seal has a permanently conical shape
  • the cross section of the pot edge tapers in the direction of the spray stroke.
  • the outer surface of the seal has an approximately straight to convex surface line.
  • the low elasticity of the pot edge part of the seal leads to a seal which is sufficient for the injection process, but the approximately tangential contact of the jacket surface of the pot edge part of the seal with the wall of the injection cylinder remains so weak that it is easy to move the syringe is guaranteed in particular as soon as the counterpressure decreases when the cannula enters the epidural space or the like.
  • FIG. 2 illustrates in an exaggerated scale that the pot edge part of the seal in the state taken out of the syringe (shown below) is one degree further "a" than in the state inserted into the syringe (shown above).
  • the pointed inlet of the pot edge part of the seal ensures that, when the seal inserted into the syringe is at rest, there is only minimal tension against the wall of the syringe barrel. Then builds up during the injection stroke of the syringe in the space below the seal. Liquid pressure on, this ensures that the contact of the seal on the wall of the cylinder is at least maintained.
  • the cup-shaped seal has a largest outer diameter of approximately 22 mm and a smallest outer diameter of approximately 19 mm.
  • the course of the lateral surface between the largest outside diameter and the smallest outside diameter is approximately straight.
  • the thickness of the bottom part of the pot is around 2 mm.
  • the smallest inside diameter of the pot edge part at the connection point to the pot base part is approximately 16 mm. Due to the pointed inflow of the pot edge part, the truncated cone-shaped outer and inner lateral surfaces of the seal result.
  • the syringe plunger is designed with a further seal 19 of the same type, but which is mounted in the opposite direction.
  • This seal acts as an additional seal for performing the suction stroke of the hypodermic syringe. This additional seal is necessary because the seal 11, because of the dimensioning described, has a system that is too weak to carry out the suction stroke.
  • FIG. 3 shows another embodiment of an injection syringe.
  • This carries a rigid piston body 21 in the interior.
  • a truncated cone-shaped seal 23 is attached to the upper end of the piston body 21 and is approximately the same length as the piston body.
  • the seal 23 is located in an intermediate space labeled "b" between the wall of the syringe barrel and the syringe plunger.
  • the width of the intermediate space and the dimensions of the seal are coordinated in such a way that there is no undesired turning of the seal backwards during the syringe stroke.
  • FIG. 4 shows a further embodiment with a plate-shaped additional seal 27 which is connected to the piston rod * 29 can be coupled or uncoupled via a threaded connection 31/33.
  • the additional seal 27 can therefore be coupled for the suction stroke and uncoupled for the spray stroke. That that the additional seal 27 cannot exert any force on the syringe plunger during the spray stroke, so that the cup-shaped seal 37 can be operated with complete sensitivity.
  • an abutment 39 is permanently provided on the spray plunger 29 for the additional seal 27, which interacts with the additional seal 27, but in no way hinders the movement of the syringe plunger.
  • FIG. 5 shows a further embodiment of the invention, in which, in addition to a cup-shaped seal 41 of the type described, an additional seal 43 is provided for carrying out the suction stroke, which can be spread open by means of an actuating device 45 in sealing contact with the wall of the cylinder.
  • the additional seal 43 is not in contact with the wall of the cylinder during the injection stroke.
  • the additional seal 43 designed as a cone can then be actuated pLatte-47 and "an actuating rod 49 are pulled up and spread so that the cone angle of the additional seal 43 flattens out and its circumference comes into sealing contact with the wall of the cylinder.
  • the actuating plate 47 and actuating rod 49 can be illustrated in a manner not shown The latching connection is then released before the injection stroke begins, so that the cup-shaped seal 41 is effective only during the injection stroke.
  • the pot-shaped gasket which tapers to the front and is of the type shown at 13, 37 and 41 can be sensitive to sufficient sensitivity at its pointed front end depending on the type of material, it can be recommended in the manner shown at 51 in FIG. 1 that the front Adjust the shape of the end of the injection syringe on the inside to the shape of the seal. At the end of the spray stroke, the inner surface of the seal 11 then comes into contact with the correspondingly designed surface 51, so that inadmissible stress on the tapering outer edge of the seal is avoided.
  • the surface 51 thus represents a stop arrangement.

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

Seringue d'injection, utilisée en particulier au cours du procédé de loss-off-resistance, comportant un cylindre de seringue (1) et un piston intérieur (3). Le piston possède à son extrémité avant un joint (11) en forme de marmite, glissant sur la paroi du cylindre et faisant saillie vers l'avant dans la direction de la course d'injection. Le bord (13) du joint en forme de marmite est pressé contre la paroi du cylindre de seringue par la pression d'injection lors de la course d'injection et peut en être séparé par une course d'aspiration. Le bord du joint continuellement conique possède une section transversale mince, une faible extensibilité et une ligne d'enveloppe extérieure allant d'une forme rectiligne à convexe pour un contact d'étanchéité libre et en forme de bande entre le joint et la paroi du cylindre seulement dans la partie avant du joint.
PCT/EP1984/000216 1983-07-15 1984-07-13 Seringue d'injection WO1985000524A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3325622.5 1983-07-15
DE19833325622 DE3325622C2 (de) 1983-07-15 1983-07-15 Injektionsspritze

Publications (1)

Publication Number Publication Date
WO1985000524A1 true WO1985000524A1 (fr) 1985-02-14

Family

ID=6204100

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1984/000216 WO1985000524A1 (fr) 1983-07-15 1984-07-13 Seringue d'injection

Country Status (3)

Country Link
EP (1) EP0148931A1 (fr)
DE (1) DE3325622C2 (fr)
WO (1) WO1985000524A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767869A (en) * 1986-08-01 1988-08-30 Davy Mckee Limited Process for the production of gamma-butyrolactone
EP0478661A1 (fr) * 1989-06-23 1992-04-08 Ultradent Products, Inc. Seringue a plongeur ameliore
US6497684B2 (en) 2000-09-27 2002-12-24 Schering Aktiengesellschaft Syringe with a barrel having a sealing cap to hold a fluid medium within the barrel
WO2009022426A1 (fr) * 2007-08-16 2009-02-19 Kabushiki Kaisha Shofu Récipient de mélange de médicaments équipé d'une paroi de séparation élastique
WO2013092008A1 (fr) * 2011-11-16 2013-06-27 Lts Lohmann Therapie-Systeme Ag Unité cylindre-piston à piston en plusieurs parties
WO2016153912A1 (fr) * 2015-03-24 2016-09-29 Bd Technologies Bouchon de seringue activé au moment de l'utilisation
US9599220B2 (en) 2011-11-16 2017-03-21 Lts Lohmann Therapie-Systeme Ag Cylinder-piston unit with short cannula
US9642969B2 (en) 2011-03-28 2017-05-09 Becton, Dickinson And Company Plastic stopper
US10578606B2 (en) 2015-09-01 2020-03-03 Becton, Dickinson And Company Depth filtration device for separating specimen phases
EP3713621A4 (fr) * 2017-11-28 2021-01-27 Kemal Tunc Tiryaki Agencement de joint de pointe pour injecteurs contenant des cellules souches

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3721954A1 (de) * 1987-07-03 1989-01-12 Technotrans S A Saugzug fuer chemische oder medizinisch-pharmazeutische geraete, beispielsweise spritzen fuer die blutentnahme, membranfilter oder dergl.
US6261258B1 (en) * 1999-05-03 2001-07-17 Marius Saines Hemostatic device for angioplasty
DE10006560A1 (de) * 2000-02-15 2001-08-23 Disetronic Licensing Ag Zweikomponentiger Kolbenstopfen
US10286151B2 (en) * 2016-02-26 2019-05-14 West Pharma. Services IL, Ltd. Plunger with reduced leakage during storage
CN110375067B (zh) * 2019-06-25 2024-06-14 北京北分瑞利分析仪器(集团)有限责任公司 一种应用于注射器的活塞密封结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR620864A (fr) * 1926-08-28 1927-04-30 Piston pour pompe ou seringue
CH366126A (fr) * 1959-03-17 1962-12-15 S E D A T Garniture en matière plastique pour piston de seringue, et procédé pour sa fabrication
US3327904A (en) * 1966-01-11 1967-06-27 Greiner Scient Corp Liquid dispensing devices

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1973042U (de) * 1967-06-23 1967-11-23 Georg A Henke G M B H Injektionsspritze.
FR1576502A (fr) * 1968-05-09 1969-08-01
SE334213C (sv) * 1968-11-27 1973-07-02 F Linder Kolvtätning vid särskilt för engångsbruk avsedd injektionsspruta
GB1324080A (en) * 1969-12-15 1973-07-18 Ici Ltd Pistons
DE2261631A1 (de) * 1972-12-13 1974-06-20 Olvera Arce Injektionsspritze mit sich selbst ausrichtendem kolben
US4000741A (en) * 1975-11-03 1977-01-04 The Kendall Company Syringe assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR620864A (fr) * 1926-08-28 1927-04-30 Piston pour pompe ou seringue
CH366126A (fr) * 1959-03-17 1962-12-15 S E D A T Garniture en matière plastique pour piston de seringue, et procédé pour sa fabrication
US3327904A (en) * 1966-01-11 1967-06-27 Greiner Scient Corp Liquid dispensing devices

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767869A (en) * 1986-08-01 1988-08-30 Davy Mckee Limited Process for the production of gamma-butyrolactone
EP0478661A1 (fr) * 1989-06-23 1992-04-08 Ultradent Products, Inc. Seringue a plongeur ameliore
EP0478661A4 (en) * 1989-06-23 1992-11-04 Ultradent Products, Inc. Syringe apparatus having improved plunger
US6497684B2 (en) 2000-09-27 2002-12-24 Schering Aktiengesellschaft Syringe with a barrel having a sealing cap to hold a fluid medium within the barrel
WO2009022426A1 (fr) * 2007-08-16 2009-02-19 Kabushiki Kaisha Shofu Récipient de mélange de médicaments équipé d'une paroi de séparation élastique
US8403180B2 (en) 2007-08-16 2013-03-26 Kabushiki Kaisha Shofu Chemicals mixing container with elastic partition wall
US9642969B2 (en) 2011-03-28 2017-05-09 Becton, Dickinson And Company Plastic stopper
EP2691132B1 (fr) * 2011-03-28 2020-05-06 Becton, Dickinson and Company Bouchon en matière plastique
US11491280B2 (en) 2011-03-28 2022-11-08 Becton, Dickinson And Company Plastic stopper
US10543318B2 (en) 2011-03-28 2020-01-28 Becton, Dickinson And Company Plastic stopper
WO2013092008A1 (fr) * 2011-11-16 2013-06-27 Lts Lohmann Therapie-Systeme Ag Unité cylindre-piston à piston en plusieurs parties
US9599220B2 (en) 2011-11-16 2017-03-21 Lts Lohmann Therapie-Systeme Ag Cylinder-piston unit with short cannula
US9302048B2 (en) 2011-11-16 2016-04-05 Lts Lohmann Therapie-Systeme Ag Cylinder-piston unit with multi-part piston
WO2016153912A1 (fr) * 2015-03-24 2016-09-29 Bd Technologies Bouchon de seringue activé au moment de l'utilisation
US10835681B2 (en) 2015-03-24 2020-11-17 Becton, Dickinson And Company Time-of-use activated syringe stopper
US11366095B2 (en) 2015-09-01 2022-06-21 Becton, Dickinson And Company Depth filtration device for separating specimen phases
US10578606B2 (en) 2015-09-01 2020-03-03 Becton, Dickinson And Company Depth filtration device for separating specimen phases
US11808757B2 (en) 2015-09-01 2023-11-07 Becton, Dickinson And Company Depth filtration device for separating specimen phases
EP3713621A4 (fr) * 2017-11-28 2021-01-27 Kemal Tunc Tiryaki Agencement de joint de pointe pour injecteurs contenant des cellules souches

Also Published As

Publication number Publication date
DE3325622C2 (de) 1986-01-30
DE3325622A1 (de) 1985-01-31
EP0148931A1 (fr) 1985-07-24

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