GB2270471A - Syringe with protective needle cap - Google Patents

Syringe with protective needle cap Download PDF

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Publication number
GB2270471A
GB2270471A GB9219302A GB9219302A GB2270471A GB 2270471 A GB2270471 A GB 2270471A GB 9219302 A GB9219302 A GB 9219302A GB 9219302 A GB9219302 A GB 9219302A GB 2270471 A GB2270471 A GB 2270471A
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GB
United Kingdom
Prior art keywords
syringe
cap
protective
needle
needle cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9219302A
Other versions
GB9219302D0 (en
Inventor
Hsian-Tzuo Chuang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHUANG HSIAN TZUO
Original Assignee
CHUANG HSIAN TZUO
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 CHUANG HSIAN TZUO filed Critical CHUANG HSIAN TZUO
Priority to GB9219302A priority Critical patent/GB2270471A/en
Publication of GB9219302D0 publication Critical patent/GB9219302D0/en
Publication of GB2270471A publication Critical patent/GB2270471A/en
Withdrawn legal-status Critical Current

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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
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3271—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position
    • 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
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3271—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position
    • A61M5/3272—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position having projections following labyrinth paths

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  • 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

The syringe includes a barrel and a needle holder 2 with a needle 4 secured thereto and a protective needle cap mounted unreleasably on the barrel assembly. The cap is movable linearly relative to the barrel assembly between a first position wherein it encloses the needle 4 and a second position wherein the needle extends out of the cap. After use of the syringe, the cap may be returned to the first position and locked therein to prevent reuse by means of a locking projection 301 and groove 20. The cap may include first and second caps 35b, 36b as shown in Fig. 6 or may have an internal screw thread which engages an external thread on the needle holder adjacent the locking groove (Fig. 9). <IMAGE>

Description

IMPROVEMENTS RELATING TO A SYRINGE The invention relates to a syringe, more particularly to a syringe with a protective needle cap that can reduce considerably the risk that a medical personnel may be accidentally pricked by the syringe needle, thereby minimizing correspondingly the risk of infection.
Medical personnel risk being infected when treating patients with contagious diseases, such as Hepatitis B, AIDS and the like. Such risks increase considerably when a syringe is used to inject patients with medicine. Therefore, medical personnel have to be extremely careful when injecting patients in order to prevent themselves from being accidentally pricked by the syringe needle.
Conventional syringes are usually provided with a protective needle cap which is detachably provided on the syringe needle. The protective needle cap is removed when the syringe is in use and is immediately replaced after using the syringe. The protective needle cap, therefore, does not effectively minimize the risk that a medical personnel may be accidentally pricked by the syringe needle since the protective needle cap has to be detached when the syringe is in use.
The main objective of the present invention is to provide an improved syringe construction which obviates the need for detaching the protective needle cap when the syringe is in use, thereby considerably reducing the risk that a medical personnel may be accidentally pricked by the syringe needle to minimize correspondingly the risk of infection.
Another objective of the present invention is to provide an improved syringe construction which has a protective needle cap that may be locked immovably onto the syringe needle holder or onto the syringe barrel so as to enclose the syringe needle therein once the syringe of the present invention has been used.
Accordingly, a syringe of the present invention comprises: a syringe barrel assembly including a syringe barrel and a syringe needle holder mounted on one end of the syringe barrel; a syringe needle secured to the syringe needle holder; and a protective needle cap mounted unreleasably on the syringe barrel assembly and being movable linearly relative to the spring barrel assembly between a first position, wherein the protective needle cap encloses the syringe needle, and a second position, wherein the syringe needle extends out of the protective needle cap.
Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments, with reference to the accompanying drawings, of which: Figure 1 is an exploded view of the first preferred embodiment of a syringe according to the present invention; Figure 2 is a fragmentary sectional view of the first preferred embodiment; Figure 3 is an illustration of the first preferred embodiment when in use; Figure 4 is an illustration of the first preferred embodiment when not in use; Figure 5 is a sectional view of a protective needle cap of the second preferred embodiment of a syringe according to the present invention; Figure 6 is a fragmentary sectional view of the third preferred embodiment of a syringe according to the present invention;; Figure 7 is a fragmentary sectional view of the fourth preferred embodiment of a syringe according to the present invention; Figure 8 is a fragmentary sectional view of the fifth preferred embodiment of a syringe according to the present invention; Figure 9 is a fragmentary sectional view of t; ;? sixth preferred embodiment of a syringe according to the present invention; Figure 10 is a fra entary sectional view of the seventh preferred embodiment of a syringe according to the present invention; Figure 11 is a fragmentary sectional view of the eighth preferred embodiment of a syringe according to the present invention; Figure 12 is a fragmentary sectional view of the ninth preferred embodiment of a syringe according to the present invention; Figure 13 is a fragmentary sectional view of the tenth preferred embodiment of a syringe according to the present invention; Figure 14 is a sectional view of the eleventh preferred embodiment of a syringe according to the present invention; Figure 15 is a fragmentary sectional view of the twelfth preferred embodiment of a syringe according to the present invention;; Figure 16 is a sectional view of the twelfth preferred embodiment illustrating how a protective needle cap is locked onto a syringe needle holder of the syringe in accordance with the present invention; Figure 17 is a fragmentary exploded view of the twelfth preferred embodiment; and Figure 18 is a fragmentary sectional view of the thirteenth preferred embodiment of a syringe according to the present invention.
Referring to Figures 1 and 2, the first preferred embodiment of a syringe according to the present invention is shown to comprise a syringe barrel assembly which includes a syringe barrel (1) and a syringe needle holder (2) mounted on one end of the syringe barrel (1), a syringe needle (4) secured to the syringe needle holder (2) and a protective needle cap (3).
The protective needle cap (3) is a tubular member which is made of a resilient plastic material and which has an open first end (30) and an opposite second end (31). The second end (31) is provided with an opening (310) which is aligned with the syringe needle (4). The first end (30) is formed with an annular inward locking projection (301). The syringe needle holder (2) has a distal end which is formed with a slightly tapered periphery (21) and further has an annular peripheral locking groove (20) which is formed adjacent to the distal end of the same.
The protective needle cap (3) is movably mounted on the syringe needle holder (2) by inserting the distal end of the syringe needle holder (2) into the first end (30) of the protective needle cap (3), thereby enclosing the syringe needle (4) therein. When providing the protective needle cap (3) on the syringe needle holder (2), the locking projection (301) initially contacts the tapered periphery (21) of the syringe needle holder (2). Movement of the protective needle cap (3) toward the syringe barrel (1) causes the tapered periphery (21) to widen slightly the locking projection (301) so as to allow the latter to move past the locking groove (20) on the syringe needle holder (2). The locking projection (301) then contracts so as to contact the surface of the syringe needle holder (2).
The opening (310) is initially covered by a closure membrane (311). The protective needle cap (3) is further provided with an outward peripheral flange (32) so as to facilitate handling of the protective needle cap (3).
Referring to Figure 3, when the first preferred embodiment is in use, the outward peripheral flange (32) is held so as to move the protective needle cap (3) from a first position to a second position in a direction toward the syringe barrel (1). The syringe needle (4) pierces the closure membrane (311) so as to expose the syringe needle (4). The first preferred embodiment is now ready for use.
Referring to Figure 4, after using the first preferred embodiment, the protective needle cap (3) is moved back to the first position in a direction away from the syringe barrel (1). The locking projection (301) of the protective needle cap (3) eventually engages the locking groove (20) of the syringe needle holder (2). Under this condition, the protective needle cap (3) is locked onto the syringe needle holder (2) such that the former encloses the syringe needle (4) but cannot be moved linearly relative to the syringe needle holder (2).
Therefore, the syringe of the present invention can reduce considerably the risk that a medical personnel may be accidentally pricked by the syringe needle, thereby minimizing correspondingly the risk of infection. The syringe of the present invention can further prevent garbage collectors from being accidentally pricked by the syringe needle when the syringe is disposed.
Referring to Figure 5, the protective needle cap (3a) of the second preferred embodiment of a syringe according to the present invention has an inner periphery which is formed with a plurality of axially extending grooves (34a) that serve to enhance the resiliency of the protective needle cap (3a), thereby facilitating the provision of the protective needle cap (3a) on the syringe needle holder.
Referring to Figure 6, the protective needle cap (3b) of the third preferred embodiment of a syringe according to the present invention is shown to include first and second caps (35b, 36b). The first and second caps (35b, 36b) are substantially similar to the protective needle cap (3) of the first preferred embodiment. The first cap (35b) is mounted movably on the syringe needle holder (2b), while the second cap (36b) is mounted movably on the first cap (36b). The protective needle cap (3b) is ideal for use with a relatively short syringe needle (4).
Referring to Figure 7, the syringe needle holder (2c) of the fourth preferred embodiment of a syringe according to the present invention is shown to further have first and second annular peripheral grooves (22c, 23c) with respective rounded bottoms. The first peripheral groove (22c) is formed posterior to the locking groove (20c). The second peripheral groove (23c) is formed adjacent to an opposite end of the syringe needle holder (2c).
The locking projection (301c) of the protective needle cap (3c) initially engages the first peripheral groove (22c), thereby retaining releasably the protective needle cap (3c) in a first position, wherein the protective needle cap (3c) encloses the syringe needle (4). When drawing medicine from a medicine container (not shown), the protective needle cap (3c) is moved to a second position, wherein the locking projection (301c) releasably engages the second peripheral groove (23c), thereby exposing the syringe needle (4). After medicine has been drawn from the medicine container, the protective needle cap (3c) is moved back to the first position.After a patient has been injected with medicine inside the fourth preferred embodiment, the protective needle cap (3c) is moved relative to the syringe needle holder (2c) so that the locking projection (301c) engages the locking groove (20c).
Referring to Figure 8, the protective needle cap (3d) of the fifth preferred embodiment of a syringe according to the present invention is shown to have an inner periphery which is formed with a pair of inward guide projections (33d) which are posterior to the locking projection (301d). The guide projections (33d) extend slidably into an axially extending rail groove (24d), which is formed on the peripheral surface of the syringe needle holder (2d) posterior to the locking groove (20d), so as to guide movement of the protective needle cap (3d) on the syringe needle holder (2d).
Referring to Figure 9, the protective needle cap (3e) of the sixth preferred embodiment of a syringe according to the present invention is shown to have an inner periphery which is formed with an internal screw thread (37e) adjacent to the first end (30e). The syringe needle holder (2e) is formed with an external screw thread (26e) adjacent to the locking groove (20e). Thus, the protective needle cap (3e) can be threadedly mounted on the syringe needle holder (2e).
Figure 10 illustrates the seventh preferred embodiment of a syringe according to the present invention. The locking projection (301f) is formed on the distal end of the syringe needle holder (2f), while the open first end (30f) of the protective needle cap (3f) is formed with a slightly tapered periphery (21f) and a locking groove (20f) which is adjacent to the tapered periphery (21f). The operation of the seventh preferred embodiment is substantially similar to that of the first preferred embodiment and will not be detailed herein.
Figure 11 is an illustration of the eighth preferred embodiment of a syringe according to the present invention. Conventional syringes can be classified into upright and inclined syringes. If the preceding embodiments were used as inclined syringes, there is a possibility that the protective needle cap may abut against the skin and obstruct the injecting process.
In the eighth preferred embodiment, the syringe needle (4) is secured eccentrically on the syringe needle holder (2g). The locking groove (20g) is formed on an upper side of the syringe needle holder (2g) adjacent to the distal end of the latter. The protective needle cap (3g) has a flat side (32g) and a curved upper side (33g). The protective needle cap (3g) has an open first end (30g), which is formed with a locking projection (301g) that is aligned with the locking groove (20g), and an opposite second end (31g), which is provided with an opening (311g) that is aligned with the syringe needle (4). The syringe needle (4) extends close to the flat side (32g) of the protective needle cap (3g) and thus, the protective needle cap (3g) does not abut against the skin when the eighth preferred embodiment is in use, thereby causing no obstruction to the injecting process.
As with the preceding embodiments, the protective needle cap (3g) is moved relative to the syringe needle holder (2g) so as to enable the locking projection (301g) to engage the locking groove (20g) of the syringe needle holder (2g) in order to enclose the syringe needle (4) and prevent movement of the protective needle cap (3g) relative to the syringe needle holder (2g).
Figure 12 is an illustration of the ninth preferred embodiment of a syringe according to the present invention. The syringe needle holder (2h) and the protective needle cap (3h) are rectangular in crosssection. The operation of the ninth preferred embodiment is substantially similar to the preceding embodiments and will not be detailed herein. The ninth preferred embodiment may be used as an inclined syringe since the protective needle cap (3h) does not abut against the skin when the ninth preferred embodiment is in use, thereby causing no obstruction to the injecting process.
Referring to Figure 13, the tenth preferred embodiment of a syringe according to the present invention is shown to be substantially similar to the first preferred embodiment. The syringe needle (4), however, is secured eccentrically on the syringe needle holder (2i). The tenth preferred embodiment may also be used as an inclined syringe since the syringe needle (4) may be provided as close as possible to the skin of the patient without any obstruction from the protective needle cap (3i).
Referring to Figure 14, the syringe needle holder (2j) of the eleventh preferred embodiment of a syringe according to the present invention is integrally formed on one end of the syringe barrel (lj). The locking groove (20j) is formed adjacent to a distal end of the syringe barrel (lj). The protective needle cap (3j) is mounted movably on the syringe barrel (lj).
Referring to Figures 15 to 17, the syringe needle holder (2k) of the twelfth preferred embodiment of a syringe according to the present invention is shown to have a peripheral surface which is formed with a pair of diametrically opposite and axially extending rail grooves (21k). The syringe needle holder (2k) is further provided with a pair of diametrically opposite locking grooves (20k) disposed adjacent to a respective one of the rail grooves (21k) at the distal end of the syringe needle holder (2k). The protective needle cap (3k) has a pair of locking projections (301k) which initially extend slidably into the respective rail groove (21k) so as to guide movement of the protective needle cap (3k) on the syringe needle holder (2k).
After using the twelfth preferred embodiment, the protective needle cap (3k) is held so as to move the locking projections (301k) to one end of the rail grooves (21k) adjacent to the distal end of the syringe needle holder (2k). The protective needle cap (3k) is then rotated relative to the syringe needle holder (2k), as shown in Figure 16, so as to cause the locking projections (301k) to move away from the rail grooves (21k) and engage a respective one of the locking grooves (20k) in order to enclose the syringe needle (4) and prevent movement of the protective needle cap (3k) relative to the syringe needle holder (2k).
Referring to Figure 18, the syringe needle holder (21) of the thirteenth preferred embodiment of a syringe according to the present invention is shown to be provided with an axially extending guide projection (211). A locking groove (201) is formed on the guide projection (211) adjacent to the distal end of the syringe needle holder (21). The protective needle cap (31) has an inner periphery which is formed with an axially extending rail groove (311) that receives slidably the guide projection (211), thereby guiding movement of the protective needle cap (31) on the syringe needle holder (21). The protective needle cap (31) is further provided with a locking projection (3011) which extends upwardly from the rail groove (311) and which is disposed at the open first end (301) of the protective needle cap (31). The protective needle cap (31) is moved so as to permit engagement between the locking projection (3011) and the locking groove (201) after using the thirteenth preferred embodiment.
It has thus been shown that the syringe of the present invention obviates the need for detaching the protective needle cap when the syringe is in use, thereby considerably reducing the risk that a medical personnel may be accidentally pricked by the syringe needle to minimize correspondingly the risk of infection. Furthermore, the protective needle cap may be locked onto the syringe needle holder or onto the syringe barrel so as to enclose the syringe needle therein once the syringe of the present invention has been used.

Claims (20)

CLAIMS:
1. A syringe, comprising: a syringe barrel assembly including a syringe barrel and a syringe needle holder mounted on one end of said syringe barrel; a syringe needle secured to said syringe needle holder; and a protective needle cap mounted unreleasably on said syringe barrel assembly and being movable linearly relative to said spring barrel assembly between a first position, wherein said protective needle cap encloses said syringe needle, and a second position, wherein said syringe needle extends out of said protective needle cap.
2. The syringe as claimed in claim 1, wherein; said protective needle cap is movably mounted on said syringe needle holder and is a tubular member which is made of a resilient plastic material and which has an open first end and an opposite second end, said second end being provided with an opening which is aligned with said syringe needle; one of said syringe needle holder and said first end of said protective needle cap having a distal end and a locking groove adjacent to said distal end; and the other one of said syringe needle holder and said first end of said protective needle cap having a distal end which is provided with a locking projection; said protective needle cap being moved relative to said syringe needle holder so as to enable said locking projection to engage said locking groove in order to lock said protective needle cap in said first position after using said syringe.
3. The syringe as claimed in claim 1, wherein said protective needle cap is provided with an outward peripheral flange to facilitate handling of said protective needle cap.
4. The syringe as claimed in claim 2, wherein said protective needle cap is provided with a closure membrane at said opening in said second end.
5. The syringe as claimed in claim 2, wherein said locking projection and said locking groove are annular.
6. The syringe as claimed in claim 2, wherein said protective needle cap has an inner periphery which is formed with a plurality of axially extending grooves which serve to enhance resiliency of said protective needle cap.
7. The syringe as claimed in claim 1, wherein: said protective needle cap includes a first cap movably mounted on said syringe needle holder and a second cap movably mounted on said first cap, each of said first and second caps is a tubular member which is made of a resilient plastic material and which has an open first end and an opposite second end, said second end being provided with an opening which is aligned with said syringe needle; one of said syringe needle holder and said first end of said first cap having a distal end and a first locking groove adjacent to said distal end; the other one of said syringe needle holder and said first end of said first cap having a distal end which is provided with a first locking projection that is adapted to engage said first locking groove;; one of said second end of said first cap and said first end of said second cap having a distal end and a second locking groove adjacent to said distal end; and the other one of said second end of said first cap and said first end of said second cap having a distal end which is provided with a second locking projection that is adapted to engage said second locking groove; said first and second caps being moved relative to said syringe needle holder so as to enable said first and second locking projections to engage said first and second locking grooves in order to lock said protective needle cap in said first position after using said syringe.
8. The syringe as claimed in claim 2, wherein: said one of said syringe needle holder and said first end of said protective needle cap further having a first peripheral groove formed posterior to said locking groove and a second peripheral groove formed adjacent to an opposite end of said syringe needle holder; said protective needle cap being moved relative to said syringe needle holder so as to enable said locking projection to engage releasably said first peripheral groove in order to enclose said syringe needle when said syringe is not in use; and said protective needle cap being moved relative to said syringe needle holder so as to enable said locking projection to engage releasably said second peripheral groove in order to expose said syringe needle when said syringe is in use.
9. The syringe as claimed in claim 2, wherein: said syringe needle holder has a peripheral surface which is formed with an axially extending rail groove; and said protective needle cap has an inner periphery which is formed with an inward guide projection that extends slidably into said rail groove so as to guide movement of said protective needle cap on said syringe needle holder.
10. The syringe as claimed in claim 2, wherein: said syringe needle holder has a peripheral surface which is formed with an external screw thread adjacent to said distal end; and said protective needle cap has an inner periphery which is formed with an internal screw thread adjacent to said first end and threadedly engaging said external screw thread of said syringe needle holder.
11. The syringe as claimed in claim 1, wherein said syringe needle is secured eccentrically on said syringe needle holder.
12. The syringe as claimed in claim 11, wherein said protective needle cap has a flat side and said syringe needle extends close to said flat side.
13. The syringe as claimed in claim 2, wherein said protective needle cap is rectangular in cross-section.
14. The syringe as claimed in claim 1, wherein said syringe barrel is integral with said syringe needle holder.
15. The syringe as claimed in claim 14, wherein; said protective needle cap is movably mounted on said syringe barrel and is a tubular member which is made of a resilient plastic material and which has an open first end and an opposite second end, said second end being provided with an opening which is aligned with said syringe needle; said syringe barrel having a distal end and a locking groove adjacent to said distal end; and said first end of said protective needle cap having a distal end which is provided with a locking projection; said protective needle cap being moved relative to said syringe barrel so as to enable said locking projection to engage said locking groove in order to lock said protective needle cap in said first position after using said syringe.
16. The syringe as claimed in claim 15, wherein said locking projection and said locking groove are annular.
17. The syringe as claimed in claim 1, wherein: said protective needle cap is movably mounted on said syringe needle holder and is a tubular member which is made of a resilient plastic material and which has an open first end and an opposite second end, said second end being provided with an opening which is aligned with said syringe needle; said syringe needle holder having a distal end, a locking groove adjacent to said distal end and a peripheral surface which is formed with an axially extending rail groove; and said first end of said protective needle cap having a distal end which is provided with a locking projection that extends slidably into said rail groove so as to guide movement of said protective needle cap on said syringe needle holder; said protective needle cap being rotated relative to said syringe needle holder so as to enable said locking projection to move away from said rail groove and engage said locking groove in order to lock said protective needle cap in said first position after using said syringe.
18. The syringe as claimed in claim 2, wherein: said syringe needle holder is provided with an axially extending guide projection; and said protective needle cap has an inner periphery which is formed with an axially extending rail groove that receives slidably said guide projection so as to guide movement of said protective needle cap on said syringe needle holder.
19. The syringe as claimed in claim 18, wherein: said locking groove is formed on said guide projection; and said locking projection extends upwardly from said rail groove.
20. A syringe as described substantially hereinbefore with reference to the accompanying drawings.
GB9219302A 1992-09-11 1992-09-11 Syringe with protective needle cap Withdrawn GB2270471A (en)

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Application Number Priority Date Filing Date Title
GB9219302A GB2270471A (en) 1992-09-11 1992-09-11 Syringe with protective needle cap

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Application Number Priority Date Filing Date Title
GB9219302A GB2270471A (en) 1992-09-11 1992-09-11 Syringe with protective needle cap

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GB9219302D0 GB9219302D0 (en) 1992-10-28
GB2270471A true GB2270471A (en) 1994-03-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0813882A2 (en) * 1996-06-21 1997-12-29 Becton, Dickinson and Company Needle safety device
EP1457221A1 (en) * 2003-03-14 2004-09-15 Ming-Jeng Shue Disposable syringe

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425120A (en) * 1982-04-15 1984-01-10 Sampson Norma A Shielded hypodermic syringe
EP0250104A1 (en) * 1986-05-22 1987-12-23 Treesa A. Spencer Disposable hypodermic syringe and needle combination having retractable, accident preventing sheath
EP0268445A2 (en) * 1986-11-19 1988-05-25 Sterimatic Holdings Limited Improvements in or relating to injection devices
GB2202747A (en) * 1987-01-17 1988-10-05 Dr William Ducat Syringes
WO1988007875A1 (en) * 1986-01-23 1988-10-20 Schneider Medical Technologies, Inc. Safety cap syringe
EP0299287A1 (en) * 1987-07-15 1989-01-18 George W. Poncy No-prick hypodermic syringe
US5057087A (en) * 1989-04-24 1991-10-15 Harmon James E Hypodermic needle safety system
US5104385A (en) * 1991-06-06 1992-04-14 Huband Michael L Protective needle assembly for hypodermic syringe
GB2252046A (en) * 1991-01-22 1992-07-29 Ricardo Sheath Oxford Steyn Syringe needle or catheter covers

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425120A (en) * 1982-04-15 1984-01-10 Sampson Norma A Shielded hypodermic syringe
WO1988007875A1 (en) * 1986-01-23 1988-10-20 Schneider Medical Technologies, Inc. Safety cap syringe
EP0250104A1 (en) * 1986-05-22 1987-12-23 Treesa A. Spencer Disposable hypodermic syringe and needle combination having retractable, accident preventing sheath
EP0268445A2 (en) * 1986-11-19 1988-05-25 Sterimatic Holdings Limited Improvements in or relating to injection devices
GB2202747A (en) * 1987-01-17 1988-10-05 Dr William Ducat Syringes
EP0299287A1 (en) * 1987-07-15 1989-01-18 George W. Poncy No-prick hypodermic syringe
US5057087A (en) * 1989-04-24 1991-10-15 Harmon James E Hypodermic needle safety system
GB2252046A (en) * 1991-01-22 1992-07-29 Ricardo Sheath Oxford Steyn Syringe needle or catheter covers
US5104385A (en) * 1991-06-06 1992-04-14 Huband Michael L Protective needle assembly for hypodermic syringe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0813882A2 (en) * 1996-06-21 1997-12-29 Becton, Dickinson and Company Needle safety device
EP0813882A3 (en) * 1996-06-21 1998-01-28 Becton, Dickinson and Company Needle safety device
EP1208862A1 (en) * 1996-06-21 2002-05-29 Becton, Dickinson and Company Needle safety device
EP1457221A1 (en) * 2003-03-14 2004-09-15 Ming-Jeng Shue Disposable syringe

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GB9219302D0 (en) 1992-10-28

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