EP0232251A1 - Fluid injector - Google Patents

Fluid injector

Info

Publication number
EP0232251A1
EP0232251A1 EP19850903866 EP85903866A EP0232251A1 EP 0232251 A1 EP0232251 A1 EP 0232251A1 EP 19850903866 EP19850903866 EP 19850903866 EP 85903866 A EP85903866 A EP 85903866A EP 0232251 A1 EP0232251 A1 EP 0232251A1
Authority
EP
European Patent Office
Prior art keywords
tube
cap
fluid injector
needle
sealing member
Prior art date
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.)
Pending
Application number
EP19850903866
Other languages
German (de)
French (fr)
Inventor
Frank Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ANGLO INFUSER SYSTEMS Ltd
Original Assignee
ANGLO INFUSER SYSTEMS Ltd
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 ANGLO INFUSER SYSTEMS Ltd filed Critical ANGLO INFUSER SYSTEMS Ltd
Publication of EP0232251A1 publication Critical patent/EP0232251A1/en
Pending legal-status Critical Current

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
    • A61M5/28—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
    • A61M5/285—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened
    • A61M5/288—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle with sealing means to be broken or opened by piercing without internal pressure increase
    • 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
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/344—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub using additional parts, e.g. clamping rings or collets
    • 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
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/347—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub rotatable, e.g. bayonet or screw
    • 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
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/348—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub snap lock, i.e. upon axial displacement of needle assembly

Definitions

  • FLUID INJECTOR This invention relates to a fluid injector suitable, for example, for use in injecting medicaments.
  • a fluid injector com ⁇ prises a tube having a piston slidable therein and a slidable sealing member in one end of the tube, and a cap located on the said one end of the tube and having a tubular needle extending therefrom inwardly of the tube, the needle communicating with a fluid passage through the cap to an injector outlet outside the tube, the cap and the sealing member being provided with co-operating screw threads whereby rotation of the cap relative to the tube draws the sealing member along the tube and into engage ⁇ ment with the needle, the sealing member having a portion thereof pierceable by the needle when the member is drawn on to the needle, thereby establishing fluid communi ⁇ cation between the interior of the tube and the " injector outlet.
  • the tube and the cap are provided with co-operating formations retaining the cap on the tube but allowing rotation relative to the tube.
  • the tube may be provided on its outer surface with a circum ⁇ ferential groove which receives a corresponding circum ⁇ ferential rib on the inwardly facing surface of the cap.
  • a resilient material such as a plastics material
  • the cap may be provided with a plurality of resiliently deflectable portions each having a rib portion engageable in the groove.
  • the tube is suitably formed of a chemically-inactive glass.
  • Figure 1 is a part-sectioned perspective view of an injector according to one embodiment of the invention
  • Figure 2 is a sectional elevation of a portion of the injector shown in Figure 1, after piercing of the seal.
  • the injector comprises a tube 1, suitably of glass, having in one end 2 thereof a piston or plunger 3 retained by an end cover 4 secured over the end of the tube.
  • the opposite end 5 of the tube 1 is closed by a rubber sealing member 6, which has a threaded bore 7 therein, and one end of which includes a thin wall 8, having a thickness of 1 to 2 mm.
  • the tube 1 has a circumferential rib 9 around the outer surface thereof adjacent the end 5.
  • the end 5 of the tube is enclosed within an end cap 10 which has a flange 12, extending therefrom around the circumference thereof, an externally screw-threaded core portion " 13 extending in the same direction as, and coaxially with, the flange 12, and a needle-connecting portion 14 extending in the opposite direction to the core portion 13.
  • the core and needle-connecting portions 13 and 14 are suitably moulded separately from the remainder of the cap and may then have a hexagonal section portion 13a_ which can be an interference fit, or be cemented into a correspondingly-shaped aperture through the cap 10.
  • a rib 15 extends around the inwardly-directed surface of the rim 12, and can engage with the rib 9 to retain the cap 10 on the tube 1.
  • the rib 15 and the rib 9 have tapered ⁇ profiles on one side only so that the cap may readily be engaged on the tube, but may not readily be removed therefrom.
  • a passage 16 extends along the axis of the cap and communicates at one end with a tubular needle 17 extend- ing from the end face 18 of the core portion 13, and at the other end with an outlet 19 at the end of the needle-connecting portion 14.
  • the needle 17 may suitably be formed of a pharmaceutically inert plastics material.
  • the needle-connecting portion 14 is adapted to receive thereon a hypodermic needle or the like having a moulded socket which fits tightly over the reduced-diameter section 20 of the portion 14.
  • the injector will suitably be provided in two parts, the first of which consists of the tube 1, with the plunger 3 and sealing member 6 closing off opposite ends, the tube containing the liquid medicament to be injected, for example.
  • the second part consists of the cap 10, to which a hypodermic needle may subsequently 5 be fitted.
  • the cap is pushed on to the end 5 of the tube, and being formed of a resilient plastics material, can deform outwardly to allow the rib 15 to be deflected over the rib 9 on the end of the tube 1.
  • the cap 10 is then rotated relative to the tube and the thread thereon o engages with the thread in the sealing member 6 to draw the member 6 along the tube towards the cap.
  • FIG. 1 shows a portion of the injector after the needle 17 has pierced the thin wall 8. Movement of the sealing member 6 along the tube 1 is limited by a shoulder 21 formed by 0 reducing the diameter of the tube 1 over the end portion 5.
  • the injector of the invention may be used for the mixing of measured doses of, for example, a liquid and a powder, without risk of contamination.
  • Two similar in- 5 jectors are used, one containing the liquid and the other the powder.
  • the needle-connecting portion 14 of the cap 10 of the liquid-containing injector is dimensioned so as to be received within the corresponding portion 14 of the cap 10 of the powder-containing injector as a sealing fit, and a retaining clip is provided to hold the two caps in sealing engagement while liquid is injected into the powder-containing injector.
  • the resulting liquid may be injected by fitting a suitable hypodermic needle on to the,cap 10 of the powder-con ⁇ taining injector, after separation of the two injectors.

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

Un injecteur de fluides destiné à l'injection de médicaments dans le corps humain comprend un tube (1) possédant un piston (3) coulissant dans le tube et un organe coulissant d'étanchéité (6) à une extrémité de tube. Un capuchon (10) est placé sur une extrémité du tube et présente une aiguille tubulaire (17) s'étendant depuis le capuchon jusqu'à l'intérieur du tube (1), l'aiguille étant en communication par l'intermédiaire d'un passage de fluide à travers le capuchon avec une sortie (19) de l'injecteur à l'extérieur du tube. Le capuchon et l'organe d'étanchéité sont pourvus de filetages correspondants et la rotation du capuchon par rapport au tube déplace l'organe d'étanchéité le long du tube, en appui contre l'aiguille qui perce une portion mince (8) de l'organe d'étanchéité, établissant ainsi une communication de fluide entre l'intérieur du tube et l'orifice de sortie de l'injecteur.A fluid injector for injecting drugs into the human body comprises a tube (1) having a piston (3) sliding in the tube and a sliding sealing member (6) at one end of the tube. A cap (10) is placed on one end of the tube and has a tubular needle (17) extending from the cap to the inside of the tube (1), the needle being in communication via a passage of fluid through the cap with an outlet (19) from the injector outside the tube. The cap and the sealing member are provided with corresponding threads and the rotation of the cap relative to the tube moves the sealing member along the tube, pressing against the needle which pierces a thin portion (8) of the sealing member, thus establishing a communication of fluid between the interior of the tube and the outlet orifice of the injector.

Description

FLUID INJECTOR This invention relates to a fluid injector suitable, for example, for use in injecting medicaments.
According to the invention, a fluid injector com¬ prises a tube having a piston slidable therein and a slidable sealing member in one end of the tube, and a cap located on the said one end of the tube and having a tubular needle extending therefrom inwardly of the tube, the needle communicating with a fluid passage through the cap to an injector outlet outside the tube, the cap and the sealing member being provided with co-operating screw threads whereby rotation of the cap relative to the tube draws the sealing member along the tube and into engage¬ ment with the needle, the sealing member having a portion thereof pierceable by the needle when the member is drawn on to the needle, thereby establishing fluid communi¬ cation between the interior of the tube and the "injector outlet.
Preferably, the tube and the cap are provided with co-operating formations retaining the cap on the tube but allowing rotation relative to the tube. For example, the tube may be provided on its outer surface with a circum¬ ferential groove which receives a corresponding circum¬ ferential rib on the inwardly facing surface of the cap. It is also preferable to mould the cap in a resilient material, such as a plastics material, so that the cap may be pushed on to the tube, the rib then snapping into the groove, or over and into engagement with a rib on the tube. Alternatively, the cap may be provided with a plurality of resiliently deflectable portions each having a rib portion engageable in the groove. The tube is suitably formed of a chemically-inactive glass.
The fluid injector of the invention is simple in construction and use. Reference is made to the drawings, in which:
Figure 1 is a part-sectioned perspective view of an injector according to one embodiment of the invention; and Figure 2 is a sectional elevation of a portion of the injector shown in Figure 1, after piercing of the seal.
The injector comprises a tube 1, suitably of glass, having in one end 2 thereof a piston or plunger 3 retained by an end cover 4 secured over the end of the tube. The opposite end 5 of the tube 1 is closed by a rubber sealing member 6, which has a threaded bore 7 therein, and one end of which includes a thin wall 8, having a thickness of 1 to 2 mm. The tube 1 has a circumferential rib 9 around the outer surface thereof adjacent the end 5. The end 5 of the tube is enclosed within an end cap 10 which has a flange 12, extending therefrom around the circumference thereof, an externally screw-threaded core portion "13 extending in the same direction as, and coaxially with, the flange 12, and a needle-connecting portion 14 extending in the opposite direction to the core portion 13. The core and needle-connecting portions 13 and 14 are suitably moulded separately from the remainder of the cap and may then have a hexagonal section portion 13a_ which can be an interference fit, or be cemented into a correspondingly-shaped aperture through the cap 10. A rib 15 extends around the inwardly-directed surface of the rim 12, and can engage with the rib 9 to retain the cap 10 on the tube 1. The rib 15 and the rib 9 have tapered ■ profiles on one side only so that the cap may readily be engaged on the tube, but may not readily be removed therefrom.
A passage 16 extends along the axis of the cap and communicates at one end with a tubular needle 17 extend- ing from the end face 18 of the core portion 13, and at the other end with an outlet 19 at the end of the needle-connecting portion 14. The needle 17 may suitably be formed of a pharmaceutically inert plastics material. The needle-connecting portion 14 is adapted to receive thereon a hypodermic needle or the like having a moulded socket which fits tightly over the reduced-diameter section 20 of the portion 14.
In use, the injector will suitably be provided in two parts, the first of which consists of the tube 1, with the plunger 3 and sealing member 6 closing off opposite ends, the tube containing the liquid medicament to be injected, for example. The second part consists of the cap 10, to which a hypodermic needle may subsequently 5 be fitted. The cap is pushed on to the end 5 of the tube, and being formed of a resilient plastics material, can deform outwardly to allow the rib 15 to be deflected over the rib 9 on the end of the tube 1. The cap 10 is then rotated relative to the tube and the thread thereon o engages with the thread in the sealing member 6 to draw the member 6 along the tube towards the cap. As the sealing member 6 moves along the tube, the needle 17 passes through the thin wall 8, thereby allowing the liquid contained in the tube to be expelled through the 5 passage 16 to the hypodermic needle (not shown) and into the patient, when the plunger 3 is pressed. Figure 2 shows a portion of the injector after the needle 17 has pierced the thin wall 8. Movement of the sealing member 6 along the tube 1 is limited by a shoulder 21 formed by 0 reducing the diameter of the tube 1 over the end portion 5.
The injector of the invention may be used for the mixing of measured doses of, for example, a liquid and a powder, without risk of contamination. Two similar in- 5 jectors are used, one containing the liquid and the other the powder. The needle-connecting portion 14 of the cap 10 of the liquid-containing injector is dimensioned so as to be received within the corresponding portion 14 of the cap 10 of the powder-containing injector as a sealing fit, and a retaining clip is provided to hold the two caps in sealing engagement while liquid is injected into the powder-containing injector. After mixing, the resulting liquid may be injected by fitting a suitable hypodermic needle on to the,cap 10 of the powder-con¬ taining injector, after separation of the two injectors.

Claims

1. A fluid injector, comprising a tube having a piston slidable therein and a slidable sealing member in one end of the tube, and a cap located on the said one end of the tube and having a tubular needle extending therefrom inwardly of the tube, the needle communicating with a fluid passage through the cap to an injector outlet outside the tube, the cap and the sealing member being provided with co-operating screw threads whereby rotation of the cap relative to the tube draws the sealing member along the tube and into engagement with the needle, the sealing member having a portion thereof pierceable by the needle when the member is drawn on to the needle, thereby establishing fluid communication between the interior of the tube and the injector outlet.
2. A fluid injector according to Claim 1, wherein the tube and the cap are provided with co-operating formations retain¬ ing the cap on the tube but allowing rotation thereof relative to the tube.
3. A fluid injector according to Claim 2, wherein the tube is provided on the outer surface thereof with a circumferen- tial groove which receives therein a corresponding circum¬ ferential rib on an inwardly facing surface of the cap.
4. A fluid injector according to Claim 2 , wherein the tube is provided on the outer surface thereof with a circumferen¬ tial rib which engages with a corresponding circumferential groove or rib on an inwardly facing surface of the cap.
5. A fluid injector according to Claim 3 or 4, wherein the cap is formed of a resilient material whereby the cap is res- iliently expandable to fit the cap on to the tube.
6. A fluid injector according to Claim 3 or 4, wherein the cap is provided with a plurality of resiliently deflectable portions each bearing a portion of the rib or groove, thereby permitting the cap to be fitted on to the tube.
7. A fluid injector according to any of Claims 3 to 6, wherein the rib or ribs or the groove is shaped so as to resist removal of the cap from the tube.
8. A fluid injector according to any preceding claim, where¬ in the tube is formed of a chemically-inactive glass.
9. A fluid injector according to any preceding claim, where¬ in the sealing member is formed of rubber, the pierceable portion thereof being in the form of a thin wall.
10. A fluid injector according to Claim 9, wherein the thin wall has a thickness of 1 to 2 mm.
11. A fluid injector, substantially as described with ref¬ erence to, or as shown in, the drawings.
EP19850903866 1985-08-12 1985-08-12 Fluid injector Pending EP0232251A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB1985/000355 WO1987001043A1 (en) 1985-08-12 1985-08-12 Fluid injector

Publications (1)

Publication Number Publication Date
EP0232251A1 true EP0232251A1 (en) 1987-08-19

Family

ID=10572509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850903866 Pending EP0232251A1 (en) 1985-08-12 1985-08-12 Fluid injector

Country Status (3)

Country Link
EP (1) EP0232251A1 (en)
GB (1) GB2152818B (en)
WO (1) WO1987001043A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT400926B (en) * 1994-07-22 1996-04-25 Epimed Kunststofftech Gmbh INJECTION SYRINGE HEAD
AUPO723997A0 (en) * 1997-06-10 1997-07-03 Astra Pharmaceuticals Pty Ltd Prefilled container
CN113180360B (en) * 2021-03-29 2022-10-11 魏翔 Alleviate device of postoperative oral cavity drying usefulness before operation fasting water patient

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496937A (en) * 1967-05-18 1970-02-24 John E Balson Hypodermic syringe
BE792131A (en) * 1972-02-15 1973-03-16 Sherwood Medical Ind Inc DEVICES FOR INJECTING MEDICINES
DE2434046C3 (en) * 1974-07-16 1979-10-18 Lothar 7500 Karlsruhe Schwarz Needle holder for medical syringes
US4365626A (en) * 1979-10-25 1982-12-28 House Hugh A Universal syringe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8701043A1 *

Also Published As

Publication number Publication date
GB2152818A (en) 1985-08-14
GB8401292D0 (en) 1984-02-22
GB2152818B (en) 1987-03-25
WO1987001043A1 (en) 1987-02-26

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Inventor name: SMITH, FRANK