JP2002102346A - Syringe - Google Patents
SyringeInfo
- Publication number
- JP2002102346A JP2002102346A JP2000293856A JP2000293856A JP2002102346A JP 2002102346 A JP2002102346 A JP 2002102346A JP 2000293856 A JP2000293856 A JP 2000293856A JP 2000293856 A JP2000293856 A JP 2000293856A JP 2002102346 A JP2002102346 A JP 2002102346A
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- injection needle
- injection
- outer cylinder
- syringe
- 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.)
- Pending
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
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
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、使用後の注射針を
簡単に取り外して廃棄すことができる注射器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe that can easily remove a used needle and discard it.
【０００２】[0002]
【従来の技術】近年、医者や看護婦等の医療従事者が、
使用済みの注射針で誤って自分の指等を刺してしまい、
様々な感染症に感染してしまう事故が報告されている。
こうした事故を防止するため、使用後の注射針を注射筒
の中に収納し、注射針を外部と遮断する注射器が使用さ
れたり、また、使用後の注射針のみを抜去する装置も知
られている。2. Description of the Related Art In recent years, medical workers, such as doctors and nurses,
I accidentally stab my finger with a used injection needle,
There have been reports of accidents involving various infectious diseases.
In order to prevent such accidents, a syringe that stores the used needle in a syringe barrel and shuts off the needle from the outside is used, and a device that removes only the used needle after use is also known. I have.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
装置によれば、装置が複雑であったり大掛かりであった
りして、製造のためのコストが増大するという問題があ
った。本発明は、上記の点にかんがみてなされたもの
で、簡単な構成によって注射針の取り外すことができる
機構を提供するものである。However, according to the conventional apparatus, there is a problem that the apparatus is complicated or large-scale, and the manufacturing cost increases. The present invention has been made in view of the above points, and provides a mechanism capable of removing a syringe needle with a simple configuration.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するた
め、本発明においては、先端に注射針を取り付けた外筒
と、外筒内に挿入されるプランジャとを備えた注射器に
おいて、注射針の後端を外筒内に突出させるように構成
した。この注射器を用いれば、注射後に、注射針の後端
の突出部分をプランジャで押せば、注射針を外筒から簡
単に取り外すことができる。According to the present invention, there is provided a syringe having an outer cylinder having an injection needle attached to a tip thereof and a plunger inserted into the outer cylinder. The rear end is configured to protrude into the outer cylinder. If this syringe is used, the injection needle can be easily removed from the outer cylinder by pushing the projected portion of the rear end of the injection needle with a plunger after the injection.
【０００５】[0005]
【発明の実施の形態】（実施形態１）図１は本発明の実
施の形態の一例を示す断面図であり、注射器１は、先端
に注射針３を取り付けた外筒５と、外筒５内に挿入され
るプランジャ７とを備えている。注射針３はハブ９に固
定されて、その後端３ａはハブ９を突き抜けて、外筒５
内に突出する程度に延びている。外筒５の先端には注射
針取付口１１が形成され、ハブ９が取付口１１に嵌合す
ることによって注射針３が外筒５に取り付けられる。ハ
ブ９及び取付口１１はテーパー状になっていて両者を強
く嵌合させることにより、注射針３は容易に抜けないよ
うになっている。(Embodiment 1) FIG. 1 is a cross-sectional view showing an example of an embodiment of the present invention. A syringe 1 has an outer cylinder 5 having a needle 3 attached to a distal end, and an outer cylinder 5. And a plunger 7 inserted therein. The injection needle 3 is fixed to the hub 9, and the rear end 3 a of the injection needle 3 penetrates through the hub 9 to form the outer cylinder 5.
It extends so as to protrude inward. An injection needle attachment port 11 is formed at the tip of the outer cylinder 5, and the injection needle 3 is attached to the outer cylinder 5 by fitting the hub 9 into the attachment port 11. The hub 9 and the mounting port 11 are tapered, and the two are strongly fitted to each other so that the injection needle 3 is not easily pulled out.
【０００６】次に上記注射器１の使用方法について説明
する。図１（Ａ）に示すように、薬液Ｍを吸入し、プラ
ンジャ７を押して注射を行い、（Ｂ）に示すように、プ
ランジャ７の先端７ａが注射針３の後端３ａに当るとプ
ランジャ７はそこで一旦制止され、注射が完了する。注
射後、プランジャ７を更に押すと注射針３の後端３ａが
押されて、図１（Ｃ）に示すように、ハブ９が取付口１
１から外れ、注射針３を外筒５から簡単に取り外すこと
ができる。Next, a method of using the syringe 1 will be described. As shown in FIG. 1 (A), the medicinal solution M is inhaled and the plunger 7 is pressed to perform injection. As shown in FIG. 1 (B), when the tip 7a of the plunger 7 hits the rear end 3a of the injection needle 3, the plunger 7 is moved. Is once stopped there and the injection is complete. After the injection, when the plunger 7 is further pushed, the rear end 3a of the injection needle 3 is pushed, and as shown in FIG.
1 and the injection needle 3 can be easily removed from the outer cylinder 5.
【０００７】ハブ９及び取付口１１はテーパー形状にな
っており、プランジャ７の先端７ａが注射針３の後端３
ａに当っただけではハブ９は抜けることはないので使用
上問題はないが、ハブ９が更に抜けにくくなるように構
成してもよい。例えば、ハブ９の内周面に突起（又は凹
部）を設け取付口１１の外周面に凹部（又は突起）を形
成し、前記突起と凹部とを嵌合させて、ハブ９が取付口
１１から簡単に抜けないようにし、注射後にプランジャ
７で強く押したときにハブ９が抜けるようにしてもよ
い。The hub 9 and the mounting opening 11 are tapered, and the tip 7a of the plunger 7 is
There is no problem in use because the hub 9 does not come off simply by hitting a. However, the hub 9 may be configured to be harder to come off. For example, a protrusion (or a concave portion) is provided on the inner peripheral surface of the hub 9, a concave portion (or a convex portion) is formed on the outer peripheral surface of the mounting port 11, and the projection and the concave portion are fitted to each other. The hub 9 may be prevented from coming out easily when the plunger 7 is strongly pressed after the injection.
【０００８】（実施形態２）図２に別の実施形態を示
す。注射器１３は、プランジャ７の先端７ａにストッパ
１５を形成したもので、その他の構成は実施形態１と同
様である。ストッパ１５は、注射完了時において、プラ
ンジャ７が注射針３の後端３ａを押さないようにプラン
ジャ７を制止させる制止手段として機能する。(Embodiment 2) FIG. 2 shows another embodiment. The syringe 13 has a stopper 15 formed at the tip 7a of the plunger 7, and the other configuration is the same as that of the first embodiment. The stopper 15 functions as stopping means for stopping the plunger 7 so that the plunger 7 does not press the rear end 3a of the injection needle 3 when the injection is completed.
【０００９】次に、注射器１３の使用方法について説明
すると、図２（Ａ）に示すように、薬液Ｍを吸入し、プ
ランジャ７を押して注射を行い、（Ｂ）に示すように、
ストッパ１５が外筒の先端面に当ったところでプランジ
ャ７は制止され、注射が完了する。ストッパ１５の位置
は製造時に予め位置決めされる。注射後、プランジャ７
を引き、図２（Ｃ）に示すようにプランジャ７を矢印方
向に回転させて、ストッパ１５が注射針３の延長線上に
位置したところで止め、図２（Ｄ）に示すようにプラン
ジャ１５を押す。するとストッパ１５によって注射針３
の後端３ａが押され、図２（Ｅ）に示すように、注射針
３が外筒５から取り外される。Next, the method of using the syringe 13 will be described. As shown in FIG. 2 (A), the drug solution M is inhaled, the plunger 7 is pressed to perform injection, and as shown in FIG.
When the stopper 15 hits the distal end surface of the outer cylinder, the plunger 7 is stopped, and the injection is completed. The position of the stopper 15 is determined in advance during manufacturing. After injection, plunger 7
2, the plunger 7 is rotated in the direction of the arrow as shown in FIG. 2 (C), and stopped when the stopper 15 is located on the extension of the injection needle 3, and the plunger 15 is pushed as shown in FIG. 2 (D). . Then, the injection needle 3 is moved by the stopper 15.
The rear end 3a is pushed, and the injection needle 3 is removed from the outer cylinder 5 as shown in FIG.
【００１０】（実施形態３）注射器１７においては、図
３（Ａ）に示すように、ストッパ１９をプランジャ７の
後端寄り（図３の右側）に配置した。図３（Ｃ）は外筒
５の後端面図であり、外筒５の後端面５ａにストッパ１
９が挿入可能な切欠き５ｂを形成した。その他の構成は
実施形態１と同様である。ストッパ１９は、はじめ図３
（Ａ）の位置にあって、注射完了時にはストッパ１９が
外筒５の後端５ａに当ってプランジャ７は制止され注射
針３の後端３ａを押圧しない（図３（Ｂ））。ストッパ
１９の位置は製造時に予め位置決めされる。注射完了
後、プランジャ７を引いて、回転させ、ストッパ１９を
切欠き５ｂの位置に移動させ、その後プランジャ７を押
すとストッパ１９は切欠き５ｂを通って下方へ移動で
き、プランジャ７の先端７ａによって注射針３の後端３
ａが押されて注射針３が外筒５から取り外される。(Embodiment 3) In the syringe 17, as shown in FIG. 3 (A), a stopper 19 is arranged near the rear end of the plunger 7 (right side in FIG. 3). FIG. 3C is a rear end view of the outer cylinder 5, and a stopper 1 is provided on the rear end face 5 a of the outer cylinder 5.
9 formed a notch 5b into which an insert was possible. Other configurations are the same as those of the first embodiment. The stopper 19 is first shown in FIG.
At the position (A), when the injection is completed, the stopper 19 hits the rear end 5a of the outer cylinder 5, the plunger 7 is stopped, and the rear end 3a of the injection needle 3 is not pressed (FIG. 3B). The position of the stopper 19 is determined in advance during manufacturing. After the injection is completed, the plunger 7 is pulled and rotated to move the stopper 19 to the position of the notch 5b. Then, when the plunger 7 is pushed, the stopper 19 can move downward through the notch 5b, and the tip 7a of the plunger 7 can be moved. The rear end 3 of the injection needle 3
a is pushed, and the injection needle 3 is removed from the outer cylinder 5.
【００１１】（実施形態４）図４の注射器２１において
は、ストッパ２３を外筒５側に設けた。すなわち、スト
ッパ２３は外筒５の先端（図４の左側）近傍の内周面に
形成された複数個の突起（又は環状の突起）であって、
注射完了時においては、プランジャ７が注射針３の後端
３ａを押さないようにプランジャ７を制止させる。すな
わち、図４（Ａ）に示すように、薬液Ｍを吸入し、プラ
ンジャ７を押して注射を行い、図４（Ｂ）に示すよう
に、プランジャ７の先端７ａがストッパ２３に当ったと
ころでプランジャ７は制止され、注射が完了する。注射
完了後、さらにプランジャ７を押すと、プランジャ７の
先端７ａがストッパ２３を乗り越え、図４（Ｃ）に示す
ように、プランジャ７の先端７ａにより注射針３の後端
３ａが押され、注射針３が外筒５から取り外される。(Embodiment 4) In the syringe 21 shown in FIG. 4, a stopper 23 is provided on the outer cylinder 5 side. That is, the stopper 23 is a plurality of protrusions (or annular protrusions) formed on the inner peripheral surface near the tip (left side in FIG. 4) of the outer cylinder 5,
When the injection is completed, the plunger 7 is stopped so that the plunger 7 does not press the rear end 3a of the injection needle 3. That is, as shown in FIG. 4 (A), the medicinal solution M is inhaled, the plunger 7 is pressed to perform injection, and as shown in FIG. 4 (B), when the tip 7a of the plunger 7 hits the stopper 23, Is stopped and the injection is completed. After the injection is completed, when the plunger 7 is further pushed, the tip 7a of the plunger 7 rides over the stopper 23, and the rear end 3a of the injection needle 3 is pushed by the tip 7a of the plunger 7, as shown in FIG. The needle 3 is removed from the outer cylinder 5.
【００１２】（実施形態５）図５の注射器２５において
は、プランジャ７の先端部７ｂに、注射針３の突出部分
３ｂを収容する複数の逃げ孔２７がプランジャ７の長さ
方向に伸びて９０゜間隔で形成されている（図６参
照）。その他の構成は実施形態１と同様である。(Embodiment 5) In the syringe 25 shown in FIG. 5, a plurality of escape holes 27 for accommodating the protruding portion 3b of the injection needle 3 extend in the longitudinal direction of the plunger 7 at the tip 7b of the plunger 7.形成 formed at intervals (see FIG. 6). Other configurations are the same as those of the first embodiment.
【００１３】注射器２５の使用方法について説明する
と、図５（Ａ）に示すように、薬液Ｍを吸入し、プラン
ジャ７を押して注射を行い、図５（Ｂ）に示すように、
プランジャ７の先端部７ｂが外筒５の先端面に当ったと
ころでプランジャ７は制止され、注射が完了する。この
とき、注射針３の突出部分３ｂは逃げ孔２７内に収容さ
れ、注射針３の突出部分３ｂは押圧されない。逃げ孔２
７は、そのうちの１つに注射針３の突出部分３ｂが挿入
されるように製造時に予め位置決めされている。注射完
了後、プランジャ７を引き、図５（Ｃ）に示すように矢
印方向に４５゜回転させて、逃げ孔２７が注射針３の延
長線上を外れた位置にきたところで止め、図５（Ｄ）の
状態にしてからプランジャ７を押す。するとプランジャ
７の先端部７ｂ（逃げ孔２７が形成されていない部分）
によって注射針３の後端３ａが押され、図５（Ｅ）に示
すように、注射針３が外筒５から取り外される。The method of using the syringe 25 will be described. As shown in FIG. 5 (A), the drug solution M is inhaled, the plunger 7 is pressed to perform injection, and as shown in FIG.
When the distal end 7b of the plunger 7 comes into contact with the distal end surface of the outer cylinder 5, the plunger 7 is stopped, and the injection is completed. At this time, the projecting portion 3b of the injection needle 3 is accommodated in the escape hole 27, and the projecting portion 3b of the injection needle 3 is not pressed. Escape hole 2
7 is previously positioned at the time of manufacture so that the protruding portion 3b of the injection needle 3 is inserted into one of them. After the injection is completed, the plunger 7 is pulled and rotated by 45 ° in the direction of the arrow as shown in FIG. 5 (C), and stopped when the escape hole 27 comes off the extended line of the injection needle 3, and FIG. ), And then push the plunger 7. Then, the tip portion 7b of the plunger 7 (the portion where the escape hole 27 is not formed).
As a result, the rear end 3a of the injection needle 3 is pushed, and the injection needle 3 is removed from the outer cylinder 5 as shown in FIG.
【００１４】（実施形態６）図７に示す注射器２９は、
プランジャ７の先端に弾性材料（ゴム等）のガスケット
３１を備えたもので、ガスケット３１の中央部には逃げ
孔２７が形成されている。図７（Ａ）に示すように、薬
液Ｍを吸入し、プランジャ７を押して注射を行い、図７
（Ｂ）に示すように、ガスケット３１の先端が外筒５の
先端面に当ったところでプランジャ７は制止され、注射
が完了する。このとき、注射針３の突出部分３ｂは逃げ
孔２７内に収容され、注射針３は押圧されない。注射
後、さらにプランジャ７を押すと、その押圧力によって
ガスケット３１が圧縮され、逃げ孔２７はつぶされ、図
７（Ｃ）に示すように圧縮されたガスケット３１によっ
て注射針３の後端３ａが押され、注射針３は外筒５から
取り外される。(Embodiment 6) A syringe 29 shown in FIG.
A gasket 31 made of an elastic material (rubber or the like) is provided at the tip of the plunger 7, and an escape hole 27 is formed in the center of the gasket 31. As shown in FIG. 7 (A), the drug solution M is inhaled, and the plunger 7 is pushed to perform injection.
As shown in (B), when the distal end of the gasket 31 hits the distal end surface of the outer cylinder 5, the plunger 7 is stopped, and the injection is completed. At this time, the protruding portion 3b of the injection needle 3 is accommodated in the escape hole 27, and the injection needle 3 is not pressed. When the plunger 7 is further pressed after the injection, the gasket 31 is compressed by the pressing force, the escape hole 27 is crushed, and the rear end 3a of the injection needle 3 is compressed by the compressed gasket 31 as shown in FIG. When pushed, the injection needle 3 is removed from the outer cylinder 5.
【００１５】（実施形態７）上記各例においては、注射
針３の後端３ａをハブ９から後方へ突出させたが、それ
に代ってプランジャ７の先端から軸を突出させ、その軸
によって注射針を押し出すようにしてもよい。図８
（Ａ）の注射器３３はその例を示し、プランジャ７の先
端７ａからさらに軸７ｃを延して形成した。注射完了後
において、押すと軸７ｃがハブ９を押し、注射針３が外
筒５から取り外される。図８（Ｂ）の注射器３５におい
ては、軸３７をアダプタ形式（取り外し可能）にして注
射針３とプランジャ先端７ａとの間に配置する。そうす
れば、既存の注射器に何ら手を加えること無く、軸３７
を１本追加するだけで本発明の注射器を実現することが
できる。なお、図８の注射器３３，３５に、図３，４に
示すストッパ１９，２３を設けてもよく、そうすれば、
注射完了時にプランジャ７を制止させ、軸７ｃ，３７が
注射針３を押すことを防止できる。(Embodiment 7) In each of the above examples, the rear end 3a of the injection needle 3 is projected rearward from the hub 9, but instead a shaft is projected from the tip of the plunger 7, and the injection is performed by the shaft. The needle may be pushed out. FIG.
(A) shows an example of the syringe 33, which is formed by further extending the shaft 7c from the tip 7a of the plunger 7. After the injection is completed, when pressed, the shaft 7c pushes the hub 9, and the injection needle 3 is removed from the outer cylinder 5. In the syringe 35 of FIG. 8 (B), the shaft 37 is arranged between the injection needle 3 and the plunger tip 7a in the form of an adapter (removable). Then, without changing the existing syringe, the shaft 37
The syringe of the present invention can be realized only by adding one. The stoppers 19 and 23 shown in FIGS. 3 and 4 may be provided in the syringes 33 and 35 in FIG.
When the injection is completed, the plunger 7 is stopped to prevent the shafts 7c and 37 from pushing the injection needle 3.
【００１６】[0016]
【発明の効果】以上説明したとおり、本発明によれば、
注射後、簡単な構成によって注射針を外筒から取り外す
ことができる。As described above, according to the present invention,
After the injection, the injection needle can be removed from the outer cylinder with a simple configuration.
【図１】本発明の実施形態１を説明する図。FIG. 1 illustrates a first embodiment of the present invention.
【図２】実施形態２を説明する図。FIG. 2 is a diagram illustrating a second embodiment.
【図３】実施形態３を説明する図。FIG. 3 is a diagram illustrating a third embodiment.
【図４】実施形態４を説明する図。FIG. 4 is a diagram illustrating a fourth embodiment.
【図５】実施形態５を説明する図。FIG. 5 is a diagram illustrating a fifth embodiment.
【図６】実施形態５のプランジャの斜視図。FIG. 6 is a perspective view of a plunger according to a fifth embodiment.
【図７】実施形態６を説明する図。FIG. 7 is a diagram illustrating a sixth embodiment.
【図８】実施形態６を説明する図。FIG. 8 is a diagram illustrating a sixth embodiment.
１，１３，１７，２１，２５，２９，３３，３５ 注射
器 ３ 注射針 ３ａ 注射針の後端 ３ｂ 注射針の突出部分 ５ 外筒 ７ プランジャ ９ ハブ １５，１９，２３ ストッパ1,13,17,21,25,29,33,35 Syringe 3 Injection needle 3a Rear end of injection needle 3b Projection of injection needle 5 Outer cylinder 7 Plunger 9 Hub 15,19,23 Stopper
Claims (5)
外筒内に挿入されるプランジャとを備えた注射器におい
て、前記注射針の後端を前記外筒内に突出させたことを
特徴とする注射器。1. A syringe provided with an outer cylinder having an injection needle attached to the tip and a plunger inserted into the outer cylinder, wherein the rear end of the injection needle is projected into the outer cylinder. And a syringe.
前記注射針の後端を押さないように前記プランジャを制
止させる制止手段を設けた請求項１に記載の注射器。2. The syringe according to claim 1, further comprising a stopping means for stopping the plunger so that the plunger does not push the rear end of the injection needle when the injection is completed.
突出部分を収容する逃げ孔を形成した請求項１に記載の
注射器。3. The syringe according to claim 1, wherein an escape hole for accommodating a protruding portion of the injection needle is formed at a tip of the plunger.
え、前記ガスケットに、前記注射針の突出部分を収容す
る逃げ孔を形成した請求項３に記載の注射器。4. The syringe according to claim 3, wherein a gasket is provided at a tip of the plunger, and a relief hole for accommodating a protruding portion of the injection needle is formed in the gasket.
外筒内に挿入されるプランジャとを備えた注射器におい
て、前記プランジャの先方に前記注射針を押出すための
軸を配置したことを特徴とする注射器。5. A syringe provided with an outer cylinder having an injection needle attached to a distal end thereof, and a plunger inserted into the outer cylinder, wherein a shaft for pushing the injection needle is disposed ahead of the plunger. A syringe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000293856A JP2002102346A (en) | 2000-09-27 | 2000-09-27 | Syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000293856A JP2002102346A (en) | 2000-09-27 | 2000-09-27 | Syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002102346A true JP2002102346A (en) | 2002-04-09 |
Family
ID=18776571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000293856A Pending JP2002102346A (en) | 2000-09-27 | 2000-09-27 | Syringe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002102346A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01122752U (en) * | 1988-02-15 | 1989-08-21 | ||
| US4976693A (en) * | 1989-12-14 | 1990-12-11 | Haast William E | Degradable syringe |
-
2000
- 2000-09-27 JP JP2000293856A patent/JP2002102346A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01122752U (en) * | 1988-02-15 | 1989-08-21 | ||
| US4976693A (en) * | 1989-12-14 | 1990-12-11 | Haast William E | Degradable syringe |
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