WO1987001043A1 - Fluid injector - Google Patents
Fluid injector Download PDFInfo
- Publication number
- WO1987001043A1 WO1987001043A1 PCT/GB1985/000355 GB8500355W WO8701043A1 WO 1987001043 A1 WO1987001043 A1 WO 1987001043A1 GB 8500355 W GB8500355 W GB 8500355W WO 8701043 A1 WO8701043 A1 WO 8701043A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tube
- cap
- fluid injector
- sealing member
- needle
- Prior art date
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.
Abstract
A fluid injector suitable for injecting medicaments into the human body comprises a tube (1) having a piston (3) slidable therein and a slidable sealing member (6) in one end thereof. A cap (10) is located over the one end and has a tubular needle (17) extending from it inwardly of the tube (1), the needle communicating via a fluid passage through the cap to an injector outlet (19) outside the tube. The cap and sealing member are 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, which pierces a thin portion (8) of the sealing member, thereby establishing fluid communication between the interior of the tube and the injector outlet.
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.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08401292A GB2152818B (en) | 1985-08-12 | 1984-01-18 | Fluid injector for injecting medicaments |
PCT/GB1985/000355 WO1987001043A1 (en) | 1985-08-12 | 1985-08-12 | Fluid injector |
EP19850903866 EP0232251A1 (en) | 1985-08-12 | 1985-08-12 | Fluid injector |
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 |
---|---|
WO1987001043A1 true WO1987001043A1 (en) | 1987-02-26 |
Family
ID=10572509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1985/000355 WO1987001043A1 (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) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996003171A1 (en) * | 1994-07-22 | 1996-02-08 | Epimed Kunststofftechnik Gesmbh | Syringe head |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3496937A (en) * | 1967-05-18 | 1970-02-24 | John E Balson | Hypodermic syringe |
US3736932A (en) * | 1972-02-15 | 1973-06-05 | Sherwood Medical Ind Inc | Injection apparatus with filter |
FR2278350A1 (en) * | 1974-07-16 | 1976-02-13 | Schwarz Lothar | NEEDLE FRAME FOR SYRINGES, MEDICAL BULBS AND SIMILAR INSTRUMENTS |
US4365626A (en) * | 1979-10-25 | 1982-12-28 | House Hugh A | Universal syringe |
-
1984
- 1984-01-18 GB GB08401292A patent/GB2152818B/en not_active Expired
-
1985
- 1985-08-12 EP EP19850903866 patent/EP0232251A1/en active Pending
- 1985-08-12 WO PCT/GB1985/000355 patent/WO1987001043A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3496937A (en) * | 1967-05-18 | 1970-02-24 | John E Balson | Hypodermic syringe |
US3736932A (en) * | 1972-02-15 | 1973-06-05 | Sherwood Medical Ind Inc | Injection apparatus with filter |
FR2278350A1 (en) * | 1974-07-16 | 1976-02-13 | Schwarz Lothar | NEEDLE FRAME FOR SYRINGES, MEDICAL BULBS AND SIMILAR INSTRUMENTS |
US4365626A (en) * | 1979-10-25 | 1982-12-28 | House Hugh A | Universal syringe |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996003171A1 (en) * | 1994-07-22 | 1996-02-08 | Epimed Kunststofftechnik Gesmbh | Syringe head |
Also Published As
Publication number | Publication date |
---|---|
EP0232251A1 (en) | 1987-08-19 |
GB2152818A (en) | 1985-08-14 |
GB2152818B (en) | 1987-03-25 |
GB8401292D0 (en) | 1984-02-22 |
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