WO1993018808A1 - Syringe for medical use with non-reusable automatically disappearing needle - Google Patents

Syringe for medical use with non-reusable automatically disappearing needle Download PDF

Info

Publication number
WO1993018808A1
WO1993018808A1 PCT/EP1993/000691 EP9300691W WO9318808A1 WO 1993018808 A1 WO1993018808 A1 WO 1993018808A1 EP 9300691 W EP9300691 W EP 9300691W WO 9318808 A1 WO9318808 A1 WO 9318808A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
syringe
base
syringe according
flower
Prior art date
Application number
PCT/EP1993/000691
Other languages
French (fr)
Inventor
Antonio Giovanni Flumene
Giuseppe Pilo
Original Assignee
Antonio Giovanni Flumene
Giuseppe Pilo
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 Antonio Giovanni Flumene, Giuseppe Pilo filed Critical Antonio Giovanni Flumene
Publication of WO1993018808A1 publication Critical patent/WO1993018808A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—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
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • 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
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221—Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3231—Proximal end of needle captured or embedded inside piston head, e.g. by friction or hooks
    • 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
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • A61M2005/3235—Fully 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
    • 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
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston

Definitions

  • the object of this invention is a syringe for intravenous use and the like, with an automatically disappearing needle, suitable to eliminate any risk of injury after the use and non-reusable.
  • the disposable syringes that are on sale are normally equipped, depending on the model, with a needle either fixed or mobile, and with a protecting cap which is taken off just before the utilization.
  • the cap which has a basically cylindrical or slightly conical shape, with a mouth on the larger side, has to be re-placed on the needle after the injection, not to leave the latter uncovered, avoiding in this way accidental injuries.
  • the aim of this invention is to eliminate the above mentioned inconveniences and to revolutionize the solutions proposed, making the syringe no longer utilizable and providing a protection system against accidental injuries which is simple, economical and safe.
  • Fig 1 is a side view of two syringes according to this invention, the first of which shows the exposed needle and the second one the retracted needle. Such retraction is due to the pushing of the piston on the cylinder projecting in the rear chamber of the syringe;
  • Fig 2 and 3 are an enlargement of Fig 1, showing the de tails more clearly;
  • Fig 4 is a median section along the a-a line of Fig 2;
  • Fig. 5 and 6 are side views of "flower" 2, in closed and open position respectively;
  • Fig. 6 and 9 are side views of "flower" 2, in closed an open position respectively, said flower being housed in the section of the front chamber 4 of the syringe;
  • Fig. 7 and 10 are median sections of Fig. 6 and 9;
  • Fig. 11 is an exploded view of needle 1;
  • Fig. 12 is an exploded view of needle 1 assembled to the elastic tube 7 in extended position
  • Fig. 13 is a view of the needle of Fig. 12 with the elastic tube 7 in retracted position;
  • Fig. 14 and 15 are side views of a variant of the needle retraction system, with the first view showing the needle exposed and the second view with the needle retracted.
  • the reference numerals 1, 2 and 4 indicate respectively the needle, the "flower” and the front chamber of the syringe according to this invention.
  • the needle 1 is a standard syringe needle, comprising a tip 11 and a ring nut 12 at 2/3 from the tip, said ring nut being suitable to prevent the mounted needle from re-entering, and a base 14 to which an elastic means 7 engages that, once the needle is released, brings it into "flower" 2.
  • the "flower” 2 has a basically truncated-conic-cylindrical shape, constituted by three “petals” 21 which form from a tubular base 24 in which a cylindrical recess is provided, suitable to cause the needle to slide and to house it.
  • the “flower” 2 is made of an elastic material, which in a rest position permits to the three “petals” 31 to remain divaricated, while they unite once housed in the front chamber 4, leaving a central hole occupied by the needle.
  • Near base 22 of "flower” 2 two projections are provided, constituting a shoulder suitable to prevent "flower” 2 from falling into the rear chamber 5 of the syringe.
  • the base 15 of the elastic tube 7 hooks up on base 22, while the opposite end of said base 15 slips in bottom 14 of needle 1.
  • the elastic means 7 is constituted by a small rubber tube performing two functions: a function of communication between chamber 5 and needle 1 and a return function for needle 1 within the cylindric recess of "flower" 2.
  • Said elastic means 7 is in extended stage when needle 1 is mounted, while it is in relaxation stage after the release and return of needle 1 into the cylindrical recess of "flower" 2.
  • the base 15 of the elastic tube 7 has a groove 16 in the part looking towards chamber 5, said groove being suitable to facilitate the flowing of the fluid contained in the syringe.
  • the syringe according to this invention is different from a standard syringe in that it has at one end a receiving chamber 4 of needle 1, which chamber also holds back the above described structures and is separated from chamber 5 by a small diaphragm 8, which permits to keep "flower” 2 axial and to cause its forwards sliding following the push by piston 6.
  • piston 6 In sucking up during the utilization, piston 6 is free to move along its longitudinal axis within chamber 5 of the syringe, while in the end-of-travel injection stage it meets base 15 of the elastic means 7, causing the forwards shifting of "flower” 2, the coming out of "petals” 21 of the front chamber 4 and the ensuing opening, release and return of the needle into the cylindrical recess of "flower” 2.
  • a rubber ring 13 which ensures the tightness between chamber 5 and chamber 4 and is in touch with diaphragm 8, is provided round base 22 of "flower" 2.
  • said spring lies at one end on a protruding ring within the cylindrical recess of "flower" 2, in correspondence of point 24 and at the other end on an annular projection of base 14 of needle 1.
  • the release mechanism of needle 1 is the same as that of this invention, while the retraction mechanism with disappearance of needle 1 is caused by the extension of the spring.
  • Another embodiment of this invention provides for the substitution of the small elastic tube having the double function of connecting the rear chamber 5 with base 14 of needle 1 and to act as an elastic means, with two distinct means, an elastic means and a connecting means, being the first one a thin rubber elastic thread, and the second one a small Teflon elastic tube, or the like.
  • Still a further embodiment of this invention is represented by the modification of the retraction system of the needle, for which a deliberate action is necessary. Therefore, such modification will be offered those who wish to make the syringe harmless by the retraction of the needle, following the deliberate retraction of the piston.
  • the release system of the needle is the same as that previously described, while the system of disappearance is obtained through the hooking up of tongue 14' on to the metal or synthetical small wheel 20 provided in a small recess 30 formed at the rubber end of piston 6 upon end of travel of the latter.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (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

Syringe with automatic retraction of the needle (1) by means of an elastic system (7) following the end-of-travel pushing exerted by the piston (7) on the cylindrical base (22) of the 'flower' (2), that in opening releases the needle (1), which falls into the front chamber (4), leaving no possibility of being re-utilized.

Description

"SYRINGE FOR MEDICAL USE WITH NON-REUSABLE AUTOMATICALLY DISAPPEARING NEEDLE"
DESCRIPTION
The object of this invention is a syringe for intravenous use and the like, with an automatically disappearing needle, suitable to eliminate any risk of injury after the use and non-reusable.
As known, the disposable syringes that are on sale are normally equipped, depending on the model, with a needle either fixed or mobile, and with a protecting cap which is taken off just before the utilization.
The cap which has a basically cylindrical or slightly conical shape, with a mouth on the larger side, has to be re-placed on the needle after the injection, not to leave the latter uncovered, avoiding in this way accidental injuries.
As the mouth of the needle's protection cap is rather small, there exists the risk of its not being centered when the needle is re-inserted in the cap. In order to eliminate or at least to reduce the injury risk during the covering of the needle, it has been already proposed to provide a needle protecting cap, which can be shifted from a rest position, in which said cap covers it totally, to a utilization position, in which said cap wraps around a cylindrical projection of the needle, uncovering it. Having made the injection, the cap can be caused to slide again on the needle, by deliberate act of the user.
The non-execution of this act involves naturally the chance of re-using the syringe and the risk of leaving around in the environment syringes having a mounted needle, which already happens with those which are on sale.
The aim of this invention is to eliminate the above mentioned inconveniences and to revolutionize the solutions proposed, making the syringe no longer utilizable and providing a protection system against accidental injuries which is simple, economical and safe.
This aim is obtained, according to this invention, through the characteristics listed in the characterizing part of the enclosed claims 1 and 2.
The advantageous characteristics of the invention shall appear clearer from the following detailed description, referred to some embodiments that are to be construed as mere, non limitative examples, illustrated in the enclosed drawings, wherein:
Fig 1 is a side view of two syringes according to this invention, the first of which shows the exposed needle and the second one the retracted needle. Such retraction is due to the pushing of the piston on the cylinder projecting in the rear chamber of the syringe;
Fig 2 and 3 are an enlargement of Fig 1, showing the de tails more clearly;
Fig 4 is a median section along the a-a line of Fig 2;
Fig. 5 and 6 are side views of "flower" 2, in closed and open position respectively;
Fig. 6 and 9 are side views of "flower" 2, in closed an open position respectively, said flower being housed in the section of the front chamber 4 of the syringe;
Fig. 7 and 10 are median sections of Fig. 6 and 9;
Fig. 11 is an exploded view of needle 1;
Fig. 12 is an exploded view of needle 1 assembled to the elastic tube 7 in extended position;
Fig. 13 is a view of the needle of Fig. 12 with the elastic tube 7 in retracted position;
Fig. 14 and 15 are side views of a variant of the needle retraction system, with the first view showing the needle exposed and the second view with the needle retracted.
With reference to such drawings, the reference numerals 1, 2 and 4 indicate respectively the needle, the "flower" and the front chamber of the syringe according to this invention.
The needle 1 is a standard syringe needle, comprising a tip 11 and a ring nut 12 at 2/3 from the tip, said ring nut being suitable to prevent the mounted needle from re-entering, and a base 14 to which an elastic means 7 engages that, once the needle is released, brings it into "flower" 2.
The "flower" 2 has a basically truncated-conic-cylindrical shape, constituted by three "petals" 21 which form from a tubular base 24 in which a cylindrical recess is provided, suitable to cause the needle to slide and to house it.
The "flower" 2 is made of an elastic material, which in a rest position permits to the three "petals" 31 to remain divaricated, while they unite once housed in the front chamber 4, leaving a central hole occupied by the needle. Near base 22 of "flower" 2, two projections are provided, constituting a shoulder suitable to prevent "flower" 2 from falling into the rear chamber 5 of the syringe.
The base 15 of the elastic tube 7 hooks up on base 22, while the opposite end of said base 15 slips in bottom 14 of needle 1.
The elastic means 7 is constituted by a small rubber tube performing two functions: a function of communication between chamber 5 and needle 1 and a return function for needle 1 within the cylindric recess of "flower" 2.
Said elastic means 7 is in extended stage when needle 1 is mounted, while it is in relaxation stage after the release and return of needle 1 into the cylindrical recess of "flower" 2. The base 15 of the elastic tube 7 has a groove 16 in the part looking towards chamber 5, said groove being suitable to facilitate the flowing of the fluid contained in the syringe.
The syringe according to this invention is different from a standard syringe in that it has at one end a receiving chamber 4 of needle 1, which chamber also holds back the above described structures and is separated from chamber 5 by a small diaphragm 8, which permits to keep "flower" 2 axial and to cause its forwards sliding following the push by piston 6.
In sucking up during the utilization, piston 6 is free to move along its longitudinal axis within chamber 5 of the syringe, while in the end-of-travel injection stage it meets base 15 of the elastic means 7, causing the forwards shifting of "flower" 2, the coming out of "petals" 21 of the front chamber 4 and the ensuing opening, release and return of the needle into the cylindrical recess of "flower" 2.
A rubber ring 13, which ensures the tightness between chamber 5 and chamber 4 and is in touch with diaphragm 8, is provided round base 22 of "flower" 2.
There is now described the embodiment variant of the elastic means 7, which utilizes a small rubber spring, coaxial with needle 1.
To be compressed, said spring lies at one end on a protruding ring within the cylindrical recess of "flower" 2, in correspondence of point 24 and at the other end on an annular projection of base 14 of needle 1.
In this case, the release mechanism of needle 1 is the same as that of this invention, while the retraction mechanism with disappearance of needle 1 is caused by the extension of the spring.
Another embodiment of this invention provides for the substitution of the small elastic tube having the double function of connecting the rear chamber 5 with base 14 of needle 1 and to act as an elastic means, with two distinct means, an elastic means and a connecting means, being the first one a thin rubber elastic thread, and the second one a small Teflon elastic tube, or the like.
Still a further embodiment of this invention is represented by the modification of the retraction system of the needle, for which a deliberate action is necessary. Therefore, such modification will be offered those who wish to make the syringe harmless by the retraction of the needle, following the deliberate retraction of the piston.
The release system of the needle is the same as that previously described, while the system of disappearance is obtained through the hooking up of tongue 14' on to the metal or synthetical small wheel 20 provided in a small recess 30 formed at the rubber end of piston 6 upon end of travel of the latter.

Claims

1. A syringe for medical use provided with two chambers (4) (5), separated by a diaphragm (8), containing one a blocking-release means (2) of needle (1) and the other one the fluid and piston (6), such that piston (6) can push base (22) of "flower" (2), causing the opening of "petals" (21), the ensuing release of needle (1), the action of the elastic means (7) and the disappearance of needle (1) within the syringe.
2. A syringe for medical use provided with two chambers
(4) (5), separated by a diaphragm (8), such as to contain a blocking-release means (2) of needle (1), constituted by a truncated-conic-cylindrical structure of elastic material, with three "petals" (21) which form from a tubular base (24), where a cylindrical recess is housed suitable to receive the elastic means (7), which permits the retraction of needle (1), and said needle (1).
3. A syringe acording to claims 1 and 2, characterized in that two projections (9) are provided near base (22) of "flower" (2), said projections forming a shoulder suitable to prevent "flower" (2) from falling into the rear chamber
(5) of the syringe.
4. A syringe according to claim 3, characterized in that the "petals" (21, in correspondence of the central hole, have a rounding off such as to form a truncated-conic recess intended for receiving ring nut (12) of needle (1).
5. A syringe according to claim 1 to 4, characterized in that the elastic means (17) is a small rubber tube, engaged at one end on base (14) of needle (1), and at the other end on base (22) of "flower" (2), with its base (15) on which a groove (16) is provided, suitable to facilitate the flowing of the fluid contained in the syringe.
6. A syringe according to the preceding claims, characterized in that needle (1) is a standard syringe needle on which a ring nut (12) of a basically truncated-conic-cylindrical shape is provided, and at whose base (14) the elastic small tube (7) engages.
7. A syringe according to claim 6, characterized in that an annular projection is provided on base (14) of needle (1), said projection constituting a shoulder for the steel spring or any similar elastic means.
8. A syringe according to any of the claims 1 to 6, characterized in that said elastic means (7) is constituted by a steel spiral spring, coaxial with needle (1).
9. A syringe according to claims 6 and 7, characterized in that the elastic means (7) is constituted by an elastic thread.
10. A syringe according to claims 8 and 9, characterized in that the connection between base (14) of needle (1) and the rear chamber (5) is obtained by means of a small tube of Silastio, Teflon or the like.
11. A syringe according to claims 1 to 4, wherein the front chamber (4) is constituted by tang (4') having the same functions.
12. A syringe according to claim 11, characterized in that needle (1) is a standard syringe needle on which at about 2/3 from the tip a ring nut (12) having a truncated-conic-cylindrical shape is provided, and on whose base two or three opposing tongues (30) are formed.
13. A syringe according to claims 11 and 12, characterized in that a small recess is provided within the rubber end of piston (6), in which recess there is a small metal or synthetical net (20), suitable for holding in tongues (30).
14. A syringe according to claims 11 to 13, characterized in that a rubber washer (13), suitable to ensure tightness, is provided on the passage point between tang (4') and the rear chamber (5).
PCT/EP1993/000691 1992-03-25 1993-03-22 Syringe for medical use with non-reusable automatically disappearing needle WO1993018808A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITSS92A000001 1992-03-25
IT92SS000001A IT1265714B1 (en) 1992-03-25 1992-03-25 SYRINGE FOR MEDICAL USE WITH AUTOMATIC RETRACTABLE NEEDLE, NOT REUSABLE.

Publications (1)

Publication Number Publication Date
WO1993018808A1 true WO1993018808A1 (en) 1993-09-30

Family

ID=11408004

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/000691 WO1993018808A1 (en) 1992-03-25 1993-03-22 Syringe for medical use with non-reusable automatically disappearing needle

Country Status (3)

Country Link
AU (1) AU3751193A (en)
IT (1) IT1265714B1 (en)
WO (1) WO1993018808A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0885027A1 (en) * 1996-10-29 1998-12-23 Retrax Safety Systems, Inc. Retractable needle and syringe combination
WO2001089604A3 (en) * 2000-05-19 2002-05-30 Retrax Safety Systems Inc Retractable needle and syringe combination
WO2013083279A3 (en) * 2011-12-09 2013-08-15 Schott Schweiz Ag Closure, particularly a syringe cap for closing a distal opening of a syringe body in a sealing manner
EP3068473A4 (en) * 2013-11-15 2017-07-26 Credence Medsystems Inc. System and method for drug delivery with a safety syringe
US10010677B2 (en) 2014-04-24 2018-07-03 Credence Medsystems, Inc. System and method for safety syringe
US10350368B2 (en) 2013-07-01 2019-07-16 Credence Medsystems, Inc. Safety syringe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989000435A1 (en) * 1987-07-13 1989-01-26 Gaarde, Gerda, Ingrid, Maria Disposable hypodermic syringe
US4995870A (en) * 1990-05-09 1991-02-26 Baskas Morris J Disposable syringe with retractable needle
WO1991005578A1 (en) * 1989-10-13 1991-05-02 Habley Medical Technology Corporation Single use syringe
WO1991010462A1 (en) * 1990-01-12 1991-07-25 Malcolm Melville Davies Hypodermic needle assemblies
US5092853A (en) * 1991-02-04 1992-03-03 Couvertier Ii Douglas Automatic retractable medical needle and method
EP0515766A1 (en) * 1991-05-29 1992-12-02 Paolo Caselli Security syringe with retractable hollow needle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989000435A1 (en) * 1987-07-13 1989-01-26 Gaarde, Gerda, Ingrid, Maria Disposable hypodermic syringe
WO1991005578A1 (en) * 1989-10-13 1991-05-02 Habley Medical Technology Corporation Single use syringe
WO1991010462A1 (en) * 1990-01-12 1991-07-25 Malcolm Melville Davies Hypodermic needle assemblies
US4995870A (en) * 1990-05-09 1991-02-26 Baskas Morris J Disposable syringe with retractable needle
US5092853A (en) * 1991-02-04 1992-03-03 Couvertier Ii Douglas Automatic retractable medical needle and method
EP0515766A1 (en) * 1991-05-29 1992-12-02 Paolo Caselli Security syringe with retractable hollow needle

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0885027A1 (en) * 1996-10-29 1998-12-23 Retrax Safety Systems, Inc. Retractable needle and syringe combination
EP0885027A4 (en) * 1996-10-29 2000-07-05 Retrax Safety Systems Inc Retractable needle and syringe combination
WO2001089604A3 (en) * 2000-05-19 2002-05-30 Retrax Safety Systems Inc Retractable needle and syringe combination
WO2013083279A3 (en) * 2011-12-09 2013-08-15 Schott Schweiz Ag Closure, particularly a syringe cap for closing a distal opening of a syringe body in a sealing manner
US10350368B2 (en) 2013-07-01 2019-07-16 Credence Medsystems, Inc. Safety syringe
US11285271B2 (en) 2013-07-01 2022-03-29 Credence Medsystems, Inc. Safety syringe
AU2014348292B2 (en) * 2013-11-15 2019-05-23 Credence Medsystems Inc. System and method for drug delivery with a safety syringe
US10300217B2 (en) 2013-11-15 2019-05-28 Credence Medsystems, Inc. System and method for drug delivery with a safety syringe
EP3068473A4 (en) * 2013-11-15 2017-07-26 Credence Medsystems Inc. System and method for drug delivery with a safety syringe
US11147928B2 (en) 2013-11-15 2021-10-19 Credence Medsystems, Inc. System and method for drug delivery with a safety syringe
US10010677B2 (en) 2014-04-24 2018-07-03 Credence Medsystems, Inc. System and method for safety syringe
US10173010B2 (en) 2014-04-24 2019-01-08 Credence Medsystems, Inc. System and method for safety syringe
US10926036B2 (en) 2014-04-24 2021-02-23 Credence Medsystems, Inc. System and method for safety syringe

Also Published As

Publication number Publication date
AU3751193A (en) 1993-10-21
ITSS920001A0 (en) 1992-03-25
IT1265714B1 (en) 1996-12-02
ITSS920001A1 (en) 1993-09-26

Similar Documents

Publication Publication Date Title
US6077253A (en) Safety needle assembly
US5385555A (en) Lockable safety shield for hypodermic syringe
US4950251A (en) Simplified retractable needle syringe
US5152750A (en) Retractable needle syringe
US5334158A (en) Automatic needle tip guard for standard hypodermic needles
US5738665A (en) Shield and actuator for needles
US5971964A (en) Retractable syringe
US4112945A (en) Operator means for syringe cartridges
US5514107A (en) Safety syringe adapter for cartridge-needle unit
US5295972A (en) Hypodermic syringe with protective cap
US5106379A (en) Syringe shielding assembly
US5092851A (en) Safety needle with spring-loaded shield
US5368577A (en) Needle stick prevention device
US5250037A (en) Syringe having needle isolation features
US7566322B2 (en) Variable-length needle covering device of an injection device
US4009716A (en) Needle-hub assembly for syringes
US20050245875A1 (en) Safety catheter
EP0603365A1 (en) A hypodermic needle with protection device
US5098401A (en) Disposable automatic needle cover assembly with safety lock
US4010565A (en) Gun cleaning and safety device
EP0413778A1 (en) Syringe which automatically makes the hypodermic needle harmless after use.
CN100358595C (en) Safety shield system for prefilled syringe
WO1993018808A1 (en) Syringe for medical use with non-reusable automatically disappearing needle
EP1174158A1 (en) Safety syringe
EP0317518B1 (en) Needle protector device for syringe.

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BB BG BR CA CZ FI HU JP KP KR LK MG MN MW NO NZ PL RO RU SD SK UA US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA