WO1999022792A1 - Self-injection device - Google Patents

Self-injection device Download PDF

Info

Publication number
WO1999022792A1
WO1999022792A1 PCT/IT1997/000273 IT9700273W WO9922792A1 WO 1999022792 A1 WO1999022792 A1 WO 1999022792A1 IT 9700273 W IT9700273 W IT 9700273W WO 9922792 A1 WO9922792 A1 WO 9922792A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
bush
syringe
removable
fact
Prior art date
Application number
PCT/IT1997/000273
Other languages
French (fr)
Inventor
Ermanno Greco
Original Assignee
Ermanno Greco
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 Ermanno Greco filed Critical Ermanno Greco
Priority to PCT/IT1997/000273 priority Critical patent/WO1999022792A1/en
Publication of WO1999022792A1 publication Critical patent/WO1999022792A1/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/20Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M5/2033Spring-loaded one-shot injectors with or without automatic needle insertion
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/28Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; 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
    • A61M5/3202Devices for protection of the needle before use, e.g. caps

Abstract

The present invention concerns a mechanism for allowing self-injection with a mechanical injector consisting of a syringe with a disposable needle, in conditions of safety, by preventing the accidental separation of the needle and the consequent expulsion of the needle from the injector.

Description

DESCRIPTION

SELF-INJECTION DEVICE

Technical Field

The present invention concerns a mechanism for allowing self-injection with a mechanical injector consisting of a syringe with a disposable needle, in

conditions of safety, by preventing the accidental separation of the needle and

the conseguent expulsion of the needle from the injector.

Background Art

Self-injection devices are widespread and have been used for a long time now

in the treatment of various pathologies, with satisfactory results.

Said devices are generally cylinder-shaped and resemble a pen. inside which

there is a piston activated by a spring which, when it is released by the patient, strikes the syringe plunger and makes the injection.

This device however, may feature shortcomings, due to the separation of the needle during the injection, which is the cause of obvious discomfort.

Disclosure of Invention

According to the present invention, the syringe inside the device is housed

within an elastic sliding bush which moves forward together with the syringe

during the injectioin: the lower end of the elastic bush container is tapered.

which prevents the needle from separating from the device at the end of the stroke, during the injection. The situation whereby the needle accidentally projects from the syringe may

occur because the end section of the bush must be elastic and capable of being

widened to extract the needle-cap, therefore, when the piston strikes the

syringe plunger, the needle might go beyond the elastic barrier represented by

the bush and be expulsed.

To prevent this from occuring, the container inside which the bush slides is

tapered at the lower end, as mentioned above, and this prevents the elastic end

of the bush to widen when it reaches the end of the stroke, i.e. at the injection.

Brief Description of the Drawings A specific embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which: Fig. 1 shows a partially exploded view and a cross-section of the lower and upper ends of the device;

Fig. 2 shows a partial cross-section of the device when the needle-cap is removed;

Fig. 3 shows a partial cross-section of the device at the injection;

Fig. 4 shows the lower end of the device after the injection, during the

reloading operation.

Referring to the drawings, the device described herein features a tapered section 11 at the lower end of the cylinder 5, which prevents the end section 12 of the elastic bush 4 from expanding when, due to the effect of the

injection, the bush 4 reaches the end of die stroke; in the situation shown in fig. 3. the end section 12 of the bush 4 are forced to remain in the resting position, thus preventing the accidental projection and separation of the needle

2 of the syringe 1. As previously mentioned, the accompanying drawings

show the various stages of operation of the device, before, during and after the

self-injection.

In Fig. 1, the syringe 1, ready for use, is inserted into the lower end the self-

injector, while the elastic bush is blocked by the button 7; the syringe is

pushed into the bush 4 until the flixible section 12 of the bush clicks into place. The flexible end 12 of the bush 4, by opening outwards, enables the passing of the needle protection 3 and, after this, it adheres to the plastic part of the

needle 2, positioning itself between the collar 2 and the protection 3.

In fig. 3, the device is shown with the top part of the self- injector screwed into

place, while the needle protection 3 is removed by pulling it downward.

Fig. 3 shows how, by activating the triggering mechanism in the top part of the self- injector, the syringe 1 and the bush 4 slide down until the end of stroke, represented by the gasket 10; the tapered section 11 of the cylinder 5 prevents the elastic section of the bush 4 from opening at the end of stroke 10

and, therefore, keep the needle firmly attached to the syringe. Fig. 4 shows how, at the end of the injection, the protection 3 is placed over the needle and the top part of the injector removed; the return spring 8 causes

the syringe to return into the lower part of the cylinder 5, thus freeing the

elastic section of the bush and enabling the extraction of the syringe with the needle protection. The preferred embodiment described and illustrated above may be modified in accordance with the state of the art, but in compliance with the following claims.

Claims

- A safety system for the disposable needles used for self-injection devices
characterised by the fact that the bush 4, furnished with clastic terminals 12
and a hook 13; characterized by a specific form, permits insertion and
removal after use of the syringe with the removable needle together with its
protective cap. - Safety sistem for removable needles used in autoinjection devices characterized by the fact that, with the syringe inserted, the hook 13 of the elastic terminals 12, locates between the needle's protective edge 3 and the plastic edge of the needle 2 itself.
- Safety sistem for removable needles used in autoinjection devices
characterized by the fact that, with the syringe inserted in the bush 4, at the
moment of screwing the upper part 14 to the lower 5, the elastic terminals 12 of the bush 4 position themselves in the restriction 11 of the cylinder 5, already preventing the elastic terminals 12 expanding outwards, in such a way that the removable needle is prevented from detaching from the syringe.
- Safety sistem for removable needles used in autoinjection devices characterized by the fact that during injection the terminals 12 remain
positioned in the restriction of the cylinder 5 preventing detachment of the
needle consequent upon impact of the bush 4 with the end stop 10.
PCT/IT1997/000273 1997-11-03 1997-11-03 Self-injection device WO1999022792A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT1997/000273 WO1999022792A1 (en) 1997-11-03 1997-11-03 Self-injection device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/IT1997/000273 WO1999022792A1 (en) 1997-11-03 1997-11-03 Self-injection device
AU48837/97A AU4883797A (en) 1997-11-03 1997-11-03 Self-injection device

Publications (1)

Publication Number Publication Date
WO1999022792A1 true WO1999022792A1 (en) 1999-05-14

Family

ID=11332735

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1997/000273 WO1999022792A1 (en) 1997-11-03 1997-11-03 Self-injection device

Country Status (2)

Country Link
AU (1) AU4883797A (en)
WO (1) WO1999022792A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007083115A1 (en) * 2006-01-23 2007-07-26 The Medical House Plc Improved autoinjector supporting the syringe at the front
WO2009141650A2 (en) * 2008-05-20 2009-11-26 Owen Mumford Limited Injection device
US7635356B2 (en) 2004-01-23 2009-12-22 The Medical House, Plc Injection device
GB2434317B (en) * 2006-01-23 2011-01-12 Medical House Plc Improved autoinjector
US8162887B2 (en) 2004-06-23 2012-04-24 Abbott Biotechnology Ltd. Automatic injection devices
US8187226B2 (en) 2007-03-07 2012-05-29 The Medical House Limited Autoinjector
US8636704B2 (en) 2009-04-29 2014-01-28 Abbvie Biotechnology Ltd Automatic injection device
US8679061B2 (en) 2006-06-30 2014-03-25 Abbvie Biotechnology Ltd Automatic injection device
US8708968B2 (en) 2011-01-24 2014-04-29 Abbvie Biotechnology Ltd. Removal of needle shields from syringes and automatic injection devices
US8734393B2 (en) 2009-04-23 2014-05-27 The Medical House Limited Autoinjector
US8747357B2 (en) 2006-12-18 2014-06-10 The Medical House Limited Autoinjector
US8758301B2 (en) 2009-12-15 2014-06-24 Abbvie Biotechnology Ltd Firing button for automatic injection device
US9180244B2 (en) 2010-04-21 2015-11-10 Abbvie Biotechnology Ltd Wearable automatic injection device for controlled delivery of therapeutic agents
US9265887B2 (en) 2011-01-24 2016-02-23 Abbvie Biotechnology Ltd. Automatic injection devices having overmolded gripping surfaces

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994013342A1 (en) * 1992-12-11 1994-06-23 Ermanno Greco A device preset for the automatic intradermal administration of a drug
WO1994026331A1 (en) * 1993-05-18 1994-11-24 Owen Mumford Limited Improvements relating to injection devices
FR2733155A1 (en) * 1995-04-18 1996-10-25 Tebro Rechargeable autoinjector
US5681291A (en) * 1992-11-19 1997-10-28 Tebro S.A. Disposable auto-injector for prefilled syringes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5681291A (en) * 1992-11-19 1997-10-28 Tebro S.A. Disposable auto-injector for prefilled syringes
WO1994013342A1 (en) * 1992-12-11 1994-06-23 Ermanno Greco A device preset for the automatic intradermal administration of a drug
WO1994026331A1 (en) * 1993-05-18 1994-11-24 Owen Mumford Limited Improvements relating to injection devices
FR2733155A1 (en) * 1995-04-18 1996-10-25 Tebro Rechargeable autoinjector

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7645265B2 (en) 2004-01-23 2010-01-12 The Medical House Plc Injection device
US7635356B2 (en) 2004-01-23 2009-12-22 The Medical House, Plc Injection device
US9764090B2 (en) 2004-06-23 2017-09-19 Abbvie Biotechnology Ltd Relating to automatic injection devices
US8162887B2 (en) 2004-06-23 2012-04-24 Abbott Biotechnology Ltd. Automatic injection devices
US9017287B2 (en) 2004-06-23 2015-04-28 Abbvie Biotechnology Ltd Automatic injection devices
EP1998831A1 (en) 2006-01-23 2008-12-10 The Medical House Plc Improved autoinjector supporting the syringe at the front
GB2434317B (en) * 2006-01-23 2011-01-12 Medical House Plc Improved autoinjector
WO2007083115A1 (en) * 2006-01-23 2007-07-26 The Medical House Plc Improved autoinjector supporting the syringe at the front
US8647299B2 (en) 2006-01-23 2014-02-11 The Medical House Limited Autoinjector supporting the syringe at the front
US20170258998A1 (en) * 2006-01-23 2017-09-14 The Medical House Limited Injection device
AU2007206772B2 (en) * 2006-01-23 2013-04-18 The Medical House Limited Improved autoinjector supporting the syringe at the front
US9486584B2 (en) 2006-06-30 2016-11-08 Abbvie Biotechnology Ltd. Automatic injection device
US8679061B2 (en) 2006-06-30 2014-03-25 Abbvie Biotechnology Ltd Automatic injection device
US8747357B2 (en) 2006-12-18 2014-06-10 The Medical House Limited Autoinjector
US8308697B2 (en) 2007-03-07 2012-11-13 The Medical House Limited Autoinjector
US8187226B2 (en) 2007-03-07 2012-05-29 The Medical House Limited Autoinjector
RU2486923C2 (en) * 2008-05-20 2013-07-10 Оуэн Мамфорд Лимитед Injection device
JP2011520545A (en) * 2008-05-20 2011-07-21 オーウェン マンフォード リミテッドOwen Mumford Limited The injection device
US8721593B2 (en) 2008-05-20 2014-05-13 Owen Mumford Limited Injection device
WO2009141650A2 (en) * 2008-05-20 2009-11-26 Owen Mumford Limited Injection device
WO2009141650A3 (en) * 2008-05-20 2010-01-21 Owen Mumford Limited Injection device having a magnetic completed injection indicator and a needle sheath removing means
US8734393B2 (en) 2009-04-23 2014-05-27 The Medical House Limited Autoinjector
US8636704B2 (en) 2009-04-29 2014-01-28 Abbvie Biotechnology Ltd Automatic injection device
US9561328B2 (en) 2009-04-29 2017-02-07 Abbvie Biotechnology Ltd Automatic injection device
US8758301B2 (en) 2009-12-15 2014-06-24 Abbvie Biotechnology Ltd Firing button for automatic injection device
US9821117B2 (en) 2010-04-21 2017-11-21 Abbvie Biotechnology Ltd Wearable automatic injection device for controlled delivery of therapeutic agents
US9180244B2 (en) 2010-04-21 2015-11-10 Abbvie Biotechnology Ltd Wearable automatic injection device for controlled delivery of therapeutic agents
US8708968B2 (en) 2011-01-24 2014-04-29 Abbvie Biotechnology Ltd. Removal of needle shields from syringes and automatic injection devices
US9339610B2 (en) 2011-01-24 2016-05-17 Abbvie Biotechnology Ltd Removal of needle shield from syringes and automatic injection devices
US9265887B2 (en) 2011-01-24 2016-02-23 Abbvie Biotechnology Ltd. Automatic injection devices having overmolded gripping surfaces
US9878102B2 (en) 2011-01-24 2018-01-30 Abbvie Biotechnology Ltd. Automatic injection devices having overmolded gripping surfaces
US10022503B2 (en) 2011-01-24 2018-07-17 Abbvie Biotechnology Ltd Removal of needle shield from syringes and automatic injection devices

Also Published As

Publication number Publication date
AU4883797A (en) 1999-05-24

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