WO1990007948A1 - Single use hypodermic syringe - Google Patents

Single use hypodermic syringe Download PDF

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Publication number
WO1990007948A1
WO1990007948A1 PCT/ES1990/000002 ES9000002W WO9007948A1 WO 1990007948 A1 WO1990007948 A1 WO 1990007948A1 ES 9000002 W ES9000002 W ES 9000002W WO 9007948 A1 WO9007948 A1 WO 9007948A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
means
tube
plunger
provided
Prior art date
Application number
PCT/ES1990/000002
Other languages
Spanish (es)
French (fr)
Inventor
Jaime Caralt Batlle
Original Assignee
Jaime Caralt Batlle
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
Priority to ESP8900179 priority Critical
Priority to ES8900179A priority patent/ES2011414A6/en
Priority to ESP9000126 priority
Priority to ES9000126A priority patent/ES2019792A6/en
Application filed by Jaime Caralt Batlle filed Critical Jaime Caralt Batlle
Publication of WO1990007948A1 publication Critical patent/WO1990007948A1/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
    • A61M5/31Details
    • 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • A61M2005/3235Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user triggered by radial deflection of the anchoring parts between needle mount and syringe barrel or needle housing, e.g. spreading of needle mount retaining hooks having slanted surfaces by engagement with correspondingly shaped surfaces on the piston at the end of an injection stroke
    • A61M2005/3236Trigger provided at the distal end, i.e. syringe end for mounting 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
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • A61M2005/3241Needle retraction energy is accumulated inside of a hollow plunger rod
    • 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
    • A61M5/50Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/508Means for preventing re-use by disrupting the piston seal, e.g. by puncturing

Abstract

The disclosed syringe is comprised of a hollow plunger (5) with which a hollow pusher (4) is integral, and to which is fixed, before and during its first use, a core (6) which tends to be driven towards the inside of the pusher (4) by means of a spring (8), core (6) whose internal end is prolonged by a short stem traversing a central obturator (18) surrounded by another annular obturator (17) integral with the plunger (5), the stem being topped by an interlocking head (19) with which a bushing (29) is complementary, said bushing being provided in the neck (27) of the needle (28), and sliding on the floating support (23) for a seat (21) of the obturator so that, after applying the injection and total emptying of the chamber (20), the head (19) interlocks with the bushing (29), and the core (6) is released and its retraction drives the needle (28) towards an inaccessibility situation within the body (1).

Description

Title: "Hypodermic syringe SINGLE USE" Campo técnico.-

The present invention relates to a hypodermic syringe for single use, of the type which after use are rendered unusable, comprising a tube with its front part narrowed and adapted to receive a hypodermic needle, and a sliding piston inside of the tube.

Técnica.- state is already too well known to use hypodermic syringes for single use, sold in hermetically sealed sterile containers that are broken at the time of using the syringe, it discarded after single use.

However, while such syringes are constuidas and marketed to be used once, the reality is that the structural characteristics thereof allow can be reused without any problem from the mechanical standpoint, but with obvious and very serious problems since health point of view.

These problems have recently become more acute after the onset of the disease AIDS, which eventually causes the death of the patient and which are not yet known a drug to cure or vaccine to prevent its spread. While there have implemented numerous embodiments of syringes for single use to prevent reuse of the same, none of them achieves automatic disablement without further danger of voluntary or involuntary wounds produced by the needle after single use thereof.

Some of the known embodiments are based on an assumed breakage, bending or partial destruction of the syringe or needle, but in them the plastic nature of the body of the syringe prevents the destruction of the same, and while trying to avoid the said reusing proceed to bending the needle, mental situation usually found a certain type of users, particularly drug addicts, who are often subjected to extreme anxiety, makes this practice be totally fruitless, and for example the needle can be straightened in greater or lesser extent and thereby eliminates an obstacle for reusing the syringe.

Description invención.-

The syringe of one use of the invention has been conceived to solve this problem at full satisfaction, ensuring that the only intended use occurs necessarily and inevitably in practice, and for this purpose said syringe centers its characteristics on a special structure, thanks to which, and at the end of the use thereof, the needle is collected into the syringe barrel, where it adopts a stable positioning of absolute inaccessibility, being necessary to destroy the syringe body itself to access the needle , which obviously knocked the whole.

In essence, the disposable syringe that is in the present invention is characterized in that the inner front of the tube a pierced seal means are disposed and held in operative position by the needle head, said head being in turn the needle subjected to the action of elastic means that tend to push it into the tube and retained by retaining means integral with the internal front of the tube, said plunger having an internal axial cavity being, whose only embouchure arranged at the front end of the plunger is cerrrada by a closure of the cavity having means for irreversible coupling with other means arranged complementary coupling head of the needle intended to work to be in mutual contact at the end of the operating stroke of the plunger, all arranged so that on reaching this útlimo the end of said working stroke, citdos collaborate means of irreversible coupling of the closing element of the hollow plunger with said complementary coupling means arranged on the head of the needle so that the locking member is irreversibly associated with the needle head, pushing the plunger in its advance to the sealing means a short distance forward and acting through them on the retaining means of the head of the needle, so that it is released, so acting said elastic means, which push the needle and closing element associated therewith to irreversibly inside the hollow piston.

According to another feature of an embodiment of the invention, the hollow plunger is set a corresponding pusher, also hollow, provided in its cavity a core, fixed to the plunger with the collaboration of a sleeve provided with large longitudinal cuts, which allow radial ormabí def ity thereof, the sleeve provided with a slight internal peripheral groove in which engages a shoulder also Perimeter core, permanently tending to be projected towards the free end of the pusher by means of a spring that relates being with the bottom of said plunger and working to contraction, I estandofí xed on the internal front of the plunger and the core respective complementary sealing, the corresponding shutter sado atrave core centrically being by a neck, which is the axial extension of said core and is topped by a locking head.

According to another feature of a second embodiment of the invention, the closing means mentioned are formed by a disc-shaped part of a slightly flexible material, its edge is in contact with the inner wall of the front of the tube and makes with it a seal, and which is provided with a central hole countersunk to receive the head end of the needle therethrough, as well as performing with said end a seal, being also provided that sheave its front side of a appendices adapted to act on the retaining means integral with the internal front of the tube, being pushed the discoidal piece for the front end of the piston to reach it at the end of its working stroke, so that discoidal piece, and with it the needle is moved forward a short distance under the thrust of the plunger and push said appendages turn to said retaining means, thereby releasing the needle, under spring action, it is forced to enter the hollow piston.

BRIEF DESCRIPTION OF THE drawings.-

Other features and advantages of the hypodermic syringe subject of the present invention will emerge from the description below made with reference to the accompanying drawings which illustrate, by way of nonlimiting example, two embodiments of the invention.

Fig. 1 is a sectional elevation view, in position of use, of a first embodiment of the syringe of the invention;

Fig. 2 illustrates a view similar to view of Fig 1 of a second embodiment of the syringe of the invention.; Y

FIG. 3 shows a view of the syringe of FIG. 1, but in the position in which it Zabel rendered useless.

In the accompanying drawings it illustrates a first embodiment, in which can be appreciated that the hypodermic syringe for single use in question, is made from a tube 1, similar to any conventional syringe and its classic tabs or fins 2 at its mouth, to facilitate its handling during injection, namely supporting the index and ring fingers over them, while the thumb rests, at the 3 end of the rod classic or thruster 4, which is integral with the corresponding plunger 5, but with the particularity that in this case said plunger 5 is hollow, as the pusher 4, and the inerior of these elements a core 6 provided at its inner end a hook 7 for a spring set 8 tensile, at its other end to the hook 9 of the free end of the pusher and that obviously tends to retract the core 6 into the hollow interior of the fixed repeatedly said pusher 4.

The core 6 is provided with a small peripheral flange 10 which engages in the complementary groove of a bushing 11 set between the core 6 and the plunger 5 and has some deformabi one radial ity, thanks to the existence of deep cuts 12 existing in the same, being finished exteriormenete this cap 11 in a perimeter tooth 13, through which interlocks in a perimeter and complementary groove of the mouth of the pusher 4, mouthpiece on which also acts a small spring 14 working in compression and by its other end is supported by an internal stepping or 15 of the plunger 5.

The piston 5, by the perimetral tongue and groove 16 or by any other appropriate means, an annular 17 shutter which is complemented by a central sector 18, which in turn is integral with the core 6, namely a rod axial extension of the latter is fixed and topped in a locking head 19, so that the elements 17 and 18 determine the moving wall of a chamber 20 in which is to stay the injectate and from the emerging light mind the aforementioned locking head 19.

Complementarily and in the bottom of the tube 1, complementing the said product chamber 20, the seat 21 for the shutter 17 is set, seat also adopts ring, which through another perimeter machihembrado 22 configuration, is secured to a floating support 23 and resting on the closed bottom 24 of the tube 1, through a robust spring 24 working in compression, acting a perimetral step 26 of the tube 1 as stroke limiter for said shutter seat 21.

Both the seat 21 and the floating bearing 23 are axially crossed by the neck 27 of the needle 28, which emerges outside centrically and through the base 24 of the tube 1 incorporating said neck 27 as inerna end a nozzle 29 in the which it is capable of enelavamiento pressure head 19 of the core 6, while the collar 27 also assisted by a cap 30 also provided with deep cuts 31, which allow its radial deformability cap analogously fixed to another core 32, from wedging a conical front 33 complementary to a similar faceting, established in the bottom 24 of tube 1 and against said core 32 is projected by another small spring 34 provided between the front of the core 32, and an inner perimetric stepping floating support 23. As a complement of the described structure and to facilitate the axial movements of the floating support 23 against the spring 25, in that s upport a groove set ring 34 acting as a guide for a cylindrical neck and recess 36 emerging from the base 24 of the body 1, or on said floating support 23 parallel blind holes are set to its axis, in which play respective emerging scions background of the body 1.

As previously mentioned above from the situation shown in Fig. 1, the syringe is usable as culquier conventional syringe, acting on the pusher 4 for filling the chamber 20 with the medicinal product concerned, and subsequent injection into the patient, prior nailed needle 1 and until the annulment of the volumetry of said chamber 20.

However and after this limit situation of total emptying, the pressure supplied to the pusher 4 itself determines the tongue and groove coupling between the coupling head 19 and the nozzle 29, interlocking is already unchanging and irreversible, and during which the support 23 yields by pressure against spring 25 and forces the core 33 to neck on the neck 27 of the needle, immobilizing the latter. Parallel unlocking sleeves 11 and 30 occurs, by disengagement of their dovetailed elements 10, so that when being released the core 6, it is pulled abruptly by the spring 8 into the pusher 4, dragging in turn get neck 27 and the corresponding needle 28 associated therewith, which thus stay inside the tube 1 of the syringe, in absolute inaccessibility, both total and partial.

The embodiment repesentada in Figs. 2 and 3 is much more simplified and, as can be seen in the drawings, comprises a tube 41, with its front part 42 tapered and adapted to receive a hypodermic needle 43 and a plunger 44 sliding on the tube 41 Inerior.

In the internal front of the tube 41 a pierced seal means are disposed and held in operative position by the head 45 of the needle 43.

Said head 45 is subjected to the action of a spring 46, preferably constituted by a helical compression spring which tends to push it into the tube 41, and is retained by retaining means sooidaríos internal front of the tube 41 .

At the front end of the plunger 44 it is arranged a closure of the recess 51 thereof, provided with means for irreversible coupling with other complementary coupling means arranged on the head 45 of the needle 43.

The closing means are constituted by said one sheave 47 of slightly flexible material, its edge is in contact with the inner wall of the front of the tube 41 and carries a seal therewith.

The discoidal part 47 is provided with a central hole 48, countersunk to receive the conical end 49 of the head 45 of the needle 43 therethrough, as well as performing with said conical end 49 a seal.

The piece discoidal 47 is also provided on its front side some appendages 50, adapted to act on the retaining means integral with the internal front of the tube 41, when pushed part discoidal 47 at the front end of the plunger 44, the get it at the end of its operational career.

At this time, the piece discoidal 47, and with it the needle 43, moves forward a short distance under the thrust of the piston 44, in turn pushing the said appendages 50 to said retaining means, whereby the needle 43 is released and, being subjected to the action of the spring 46, it is forced by the latter to be introduced into the cavity 51 of the plunger 44.

Said means integral to the front of the tube 41 retaining are constituted by a plurality of flexible tongues 52, arising from the tube wall 41 and are directed obliquely forward and inward, being adapted to be embedded in the inside a peripheral annular groove 53 formed in the outside of the head 45 of the needle 43, where they are drawn by being pushed by bending the appendices 50 of the sheave 47 of said shutter.

Said closing element of cavity 51 of the plunger 44, is constituted by a discoid button 54, snapped by its edge into the annular groove 55 formed in the mouth 51 of said recess.

Said button 54 is provided with a projecting boss 56, which constitutes said first means for irreversible coupling and which is provided with a peripheral shoulder 57 intended iantroducírse pressure in the countersunk hole 58 of the head 45 of the needle 43, the remaining prevented from leaving by the opposing action of said second means complementary coupling, constituted in turn by a recess step.

In the mouth of the hollow tube 41, retaining means of the plunger 44, preferably constituted by ribs 59 and 60 found, which prevent complete removal thereof within the tube 41 they are arranged.

sufficiently described the nature of the inven to as well as how to implement it, stating that everything does not alter, change or modify its fundamental principle is made, it can be subjected to variations of detail.

Claims

What is claimed
1. Hypodermic syringe for single use, of the type which after use are rendered unusable, comprising a tube with its front part narrowed and adapted to receive a hypodermic needle, and a sliding plunger inside the tube, characterized because the internal front of the tube a pierced seal means are disposed and held in operative position by the head of the needle, said needle head subjected to the action of elastic means which tend to push being in turn to the inside the tube, and retained by retaining means integral with the internal front of the tube, said plunger provided with an internal axial recess, whose only opening, arranged in the front end of the plunger being is closed by a closure element the cavity provided with first means irreversible coupling to second means of complementary coupling arranged the needle head and intended to cooperate with the first coupling means to be in mutual contact at the end of the operating stroke of the plunger, all arranged so that upon reaching the latter at the end of said operative run, collaborate said first means for irreversible coupling of the closing element of the hollow piston with said second means arranged complementary coupling head of the needle so that the locking member is irreversibly associated with the head of the needle, pushing the plunger in its advance to the sealing means a short distance forward and acting through them on the retaining means of the head of the needle, so that it is released, so acting said elastic means, which push the needle and irreversibly closing element associated with it into the interior of the hollow piston.
2. Hypodermic syringe according to claim 1, characterized in that the hollow piston is set a corresponding pusher, also hollow, provided in its cavity a core, fixed to the plunger with the collaboration of a sleeve provided with large longitudinal cuts, which allow radial deformability thereof, the proposed cap seen a slight internal peripheral groove in which engages a shoulder also perimeter of the core, permanently tending to be projected towards the free end of the pusher by means of a spring that relates being with the bottom of said plunger and working to contraction being fixed on the internal front of the plunger and the core respective complementary sealing being the sealing tooth correspon the core pierced centrically by a neck, which is the axial extension of said core and it is surmounted by a locking head.
3. Syringe according to claims 1 and 2, characterized in that the sealing works for forming the accommodating chamber injectate, a seat which in turn is secured to a floating support, which rests on the bottom closed tube with interposition of a spring working in compression, the seat being and its support axially pierced by a neck to which is secured the needle, said neck surmounted by its inner end in a nozzle locking complementary head core being and receiving and fixed to the latter by compression, the end of the phase axial travel of the plunger being arranged between the collar of the needle and the floating seat support one second bushing, similar to the first cap, provided with cuts and analogs thereof fixed to the said neck.
4. Syringe according to claims 1 to 3, characterized in that the first bushing is provided at its outer end a perimeter tooth, through which engages an inner peripheral groove of the pusher, while between the corresponding end of said pusher and internal stepping of the plunger, is arranged a small spring locking jaa compression.
5. Syringe according to claims 1 to 4, wherein the second bushing that guides and retains the neck of the needle, is in turn provided with a peripheral tooth on its outer mouth, for engaging in a likewise perimetric throat another plunger, between whose inner end and an internal perimetral stepping floating support is provided another small spring working in compression, while its free end is provided with a tapered front for the wedging of said cap on the neck of the needle .
6. Syringe according to claims 1 to 5, wherein the tube is provided with an inner perimetral staggering limiter functions travel stop for the shutter seat, while the ftotante support said seat is provided with a annular guide groove on a wall also annular emerging from the base of the tube.
7. Hypodermic syringe for single use, according to claim 1, characterized in that said sealing means are constituted by a discoidal part of a slightly flexible material, its edge is in contact with the inner wall of the front of the tube and carries with it a seal, and which is provided with a central hole countersunk to receive the head end of the needle therethrough, as well as performing with said end a seal, being also provided that sheave its front side of appendages adapted to act on the retaining means integral with the internal front of the tube, being pushed the discoidal piece for the front end of the piston to reach it at the end of its working stroke, so that discoidal piece, and with it the needle moves forward a short distance under the thrust of the plunger and push said appendages turn to cit ed retaining means, thereby releasing the needle, subjected to the action of the spring means, it is forced to enter the hollow piston.
8. Hypodermic Jerinquílla single use according to claims 1 and 7, characterized in that said means integral to the front of the tube retaining are constituted by a plurality of flexible tongues, arising from the tube wall and are aimed in direction obliquely forward and inward, being adapted to be fitted within an annular groove peripheral practiced outside the needle head, from where they are extracted by bending when pushed by the appendices of the sheave sealing said .
9. Hypodermic syringe for single use according to claims 1, 7 and 8, characterized in that said closure element the hollow piston is constituted by a discoidal button, snap fitted by its edge into an annular groove formed in the mouth of the hollow piston, said discoid button a projecting anterior protrusion constituting said first means for irreversible coupling and which is provided with a peripheral step intended to be pressed into the countersunk hole of the head of the needle being provided, which is prevented from leaving by the action of said means opposing second complementary coupling, constituted in turn by a recess step.
10. Hypodermic syringe of one use of claim 1, wherein at the mouth of the hollow tube retaining means of the piston, which prevent the complete removal thereof within the tube are arranged.
PCT/ES1990/000002 1989-01-19 1990-01-18 Single use hypodermic syringe WO1990007948A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ESP8900179 1989-01-19
ES8900179A ES2011414A6 (en) 1989-01-19 1989-01-19 Single-use syringe
ESP9000126 1990-01-17
ES9000126A ES2019792A6 (en) 1990-01-17 1990-01-17 hipodrmica single-use syringe.

Publications (1)

Publication Number Publication Date
WO1990007948A1 true WO1990007948A1 (en) 1990-07-26

Family

ID=26154405

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES1990/000002 WO1990007948A1 (en) 1989-01-19 1990-01-18 Single use hypodermic syringe

Country Status (3)

Country Link
AU (1) AU4959690A (en)
ES (1) ES2011414A6 (en)
WO (1) WO1990007948A1 (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991003269A1 (en) * 1989-08-28 1991-03-21 Townsend Controls Pty. Ltd. Safety syringe
GB2239805A (en) * 1990-01-12 1991-07-17 Malcolm Melville Davies Hypodermic needle assemblies
EP0505330A1 (en) * 1991-03-18 1992-09-23 PROFARM S.p.A. Selflocking syringe
WO1992018187A1 (en) * 1991-04-11 1992-10-29 Safe-T-Limited Syringe with retractable needle
WO1993000950A1 (en) * 1991-07-05 1993-01-21 Mauro Ghigo Disposable safety syringe
WO1993012830A1 (en) * 1992-01-03 1993-07-08 Lok-Needle Syringe Company Pty. Ltd. Hypodermic syringe with retractable needle
ES2056741A1 (en) * 1993-02-23 1994-10-01 Batlle Jaime Caralt Improvements made to single-use hypodermic syringes
EP0618818A1 (en) * 1991-12-23 1994-10-12 PRESSLY, William B. S. Safety syringe
US5800403A (en) * 1991-12-23 1998-09-01 Syringe Development Partners L.L.C. Safety syringe
US5843034A (en) * 1993-10-28 1998-12-01 Lok-Tek International Ltd. Hypodermic syringe with retractable needle mount
EP0962230A2 (en) * 1990-11-07 1999-12-08 MDC Investment Holdings, Inc. Needle device, particularly hypodermic needle
ES2147118A1 (en) * 1998-02-11 2000-08-16 Calas Sanz Ramon Vicente Disposable syringe with a retractable needle includes a piston with an actuator made axially mobile in a tubular spring loaded casing
WO2005030303A1 (en) * 2003-09-25 2005-04-07 Nmt Group Plc Syringe with retractable needle
US6913595B2 (en) 2000-12-22 2005-07-05 Nicodel S.A. Medical device and locking mechanism therefor
CN102614562A (en) * 2011-01-26 2012-08-01 颜健民 Contracting rod syringe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4994034A (en) * 1989-07-11 1991-02-19 Botich Michael J Retractable needle hypodermic syringe system
ES2116917B1 (en) * 1996-06-07 1999-04-16 Calas Sanz Ramon Vicente Syringe with retractile needle uniuso.

Citations (3)

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Publication number Priority date Publication date Assignee Title
US3306290A (en) * 1964-02-14 1967-02-28 Harold S Weltman Automatically retractable needle syringe
US4692156A (en) * 1985-12-06 1987-09-08 Irene Haller Disposable syringe with retractable cannula
US4747831A (en) * 1987-04-29 1988-05-31 Phase Medical, Inc. Cannula insertion set with safety retracting needle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306290A (en) * 1964-02-14 1967-02-28 Harold S Weltman Automatically retractable needle syringe
US4692156A (en) * 1985-12-06 1987-09-08 Irene Haller Disposable syringe with retractable cannula
US4747831A (en) * 1987-04-29 1988-05-31 Phase Medical, Inc. Cannula insertion set with safety retracting needle

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991003269A1 (en) * 1989-08-28 1991-03-21 Townsend Controls Pty. Ltd. Safety syringe
GB2239805A (en) * 1990-01-12 1991-07-17 Malcolm Melville Davies Hypodermic needle assemblies
EP0962230A3 (en) * 1990-11-07 2000-01-05 MDC Investment Holdings, Inc. Needle device, particularly hypodermic needle
EP0962230A2 (en) * 1990-11-07 1999-12-08 MDC Investment Holdings, Inc. Needle device, particularly hypodermic needle
EP0505330A1 (en) * 1991-03-18 1992-09-23 PROFARM S.p.A. Selflocking syringe
WO1992018187A1 (en) * 1991-04-11 1992-10-29 Safe-T-Limited Syringe with retractable needle
AU671585B2 (en) * 1991-04-11 1996-09-05 Safe-T-Limited Syringe with retractable needle
US5407436A (en) * 1991-04-11 1995-04-18 Safe-T-Limited Of Laurel House Syringe with retractable needle
WO1993000950A1 (en) * 1991-07-05 1993-01-21 Mauro Ghigo Disposable safety syringe
EP0618818A1 (en) * 1991-12-23 1994-10-12 PRESSLY, William B. S. Safety syringe
EP0618818A4 (en) * 1991-12-23 1995-05-24 William B S Pressly Safety syringe.
US6074370A (en) * 1991-12-23 2000-06-13 Syringe Development Partners L.L.C. Safety syringe
US6605073B1 (en) 1991-12-23 2003-08-12 Medsafe Technologies, Llc Safety syringe
EP0914837A2 (en) * 1991-12-23 1999-05-12 PRESSLY, William B. S. Safety syringe
EP0914837A3 (en) * 1991-12-23 1999-06-02 PRESSLY, William B. S. Safety syringe
US5800403A (en) * 1991-12-23 1998-09-01 Syringe Development Partners L.L.C. Safety syringe
WO1993012830A1 (en) * 1992-01-03 1993-07-08 Lok-Needle Syringe Company Pty. Ltd. Hypodermic syringe with retractable needle
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ES2147118A1 (en) * 1998-02-11 2000-08-16 Calas Sanz Ramon Vicente Disposable syringe with a retractable needle includes a piston with an actuator made axially mobile in a tubular spring loaded casing
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CN102614562A (en) * 2011-01-26 2012-08-01 颜健民 Contracting rod syringe

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ES2011414A6 (en) 1990-01-01
AU4959690A (en) 1990-08-13

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