JPH0225125B2 - - Google Patents
Info
- Publication number
- JPH0225125B2 JPH0225125B2 JP56040492A JP4049281A JPH0225125B2 JP H0225125 B2 JPH0225125 B2 JP H0225125B2 JP 56040492 A JP56040492 A JP 56040492A JP 4049281 A JP4049281 A JP 4049281A JP H0225125 B2 JPH0225125 B2 JP H0225125B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical body
- syringe
- syringe tip
- tip
- reagent
- 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.)
- Expired - Lifetime
Links
- 239000003153 chemical reaction reagent Substances 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000013013 elastic material Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
- B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type
Landscapes
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
Description
【発明の詳細な説明】
この発明は、例えば自動化学分析装置に装備す
るシリンジに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a syringe installed in, for example, an automatic chemical analyzer.
従来、大勢の患者から採取した尿や血液などの
多数の被検体試料につき、自動的にGOT、GPT
などの化学分析をする自動化学分析装置におい
て、強酸性から強アルカリ性までの種々のPHであ
る試薬を供給する装置として第１図に示すような
シリンジがある。同図において、シリンジ１は硬
質ガラス製の筒状体２、プランジヤ３およびたと
えばフツ素樹脂製のシリンジチツプ４より主とし
て構成されている。そして、プランジヤ３の先端
に装着されたシリンジチツプ４は筒状体２の内壁
に密着して図示しない駆動装置により摺動するこ
とができるように構成され、シリンジチツプ４の
摺動により筒状体２内に試薬を吸引し、吐出する
ようになつている。 Previously, GOT and GPT were automatically applied to a large number of specimen samples such as urine and blood collected from a large number of patients.
In automatic chemical analyzers for chemical analysis, such as those shown in FIG. 1, there is a syringe as a device for supplying reagents with various pH values from strongly acidic to strongly alkaline. In the figure, a syringe 1 is mainly composed of a cylindrical body 2 made of hard glass, a plunger 3, and a syringe tip 4 made of, for example, fluororesin. The syringe tip 4 attached to the tip of the plunger 3 is configured to be in close contact with the inner wall of the cylindrical body 2 and can be slid by a drive device (not shown). The reagent is sucked into the chamber 2 and discharged.
しかしながら、前記のように形成するシリンジ
１においては、シリンジチツプ４は、シリンジチ
ツプ４より硬度が大きく、かつ容易に弾性変形を
しない硬質ガラス製の筒状体２により大きな圧縮
力を受けながら摺動するので、シリンジチツプ４
の駆動に大きな力を要し、それだけ大型で強力な
駆動装置を使用しなければならず、また、シリン
ジチツプ４の摺動面の摩耗が著しく、シリンジの
寿命が短いという欠点がある。しかも、硬質ガラ
スの熱、膨張係数とフツ素樹脂のそれとは大きな
相違が有るので、たとえば常温において筒状体２
とシリンジチツプ４とが密着摺動するようになつ
ていても、低温になると筒状体２とシリンジチツ
プ４との密着が甘くなつて、試薬が漏洩すること
がある。さらに、硬質ガラス製の筒状体２を使用
するシリンジ１は製造コストが高いという問題点
もある。 However, in the syringe 1 formed as described above, the syringe tip 4 slides while being subjected to a large compressive force by the hard glass cylindrical body 2, which is harder than the syringe tip 4 and does not easily undergo elastic deformation. Therefore, syringe tip 4
A large amount of force is required to drive the syringe, which requires the use of a large and powerful drive device.Furthermore, the sliding surface of the syringe tip 4 is subject to significant wear, resulting in a short life span of the syringe. Moreover, since there is a large difference between the heat and expansion coefficients of hard glass and those of fluororesin, for example, at room temperature, the cylindrical body
Even if the cylindrical body 2 and the syringe tip 4 are designed to slide in close contact with each other, when the temperature becomes low, the close contact between the cylindrical body 2 and the syringe tip 4 becomes loose, and the reagent may leak. Furthermore, the syringe 1 that uses the cylindrical body 2 made of hard glass has the problem of high manufacturing cost.
そこで、シリンジチツプ４の摩耗を防止し、ま
た、低温において熱膨張率の相違による試薬の漏
洩を防止するために、第２図に示すように、シリ
ンジチツプ４ａの外径よりもわずかに小さい内径
を有すると共に、シリンジチツプ４ａを密挿する
部分においてわずかにふくれる程度の弾力性を有
する合成樹脂製の筒状体２ａを具備するシリンジ
１ａが提案されている。筒状体２ａが合成樹脂製
であれば、筒状体２ａによるシリンジチツプ４ａ
の摩耗は低減され、しかも筒状体２ａとシリンジ
チツプ４ａとはその熱膨張率に大きな相違がない
から低温における試薬の漏洩はなく、さらにシリ
ンジチツプ４ａの外径よりも筒状体２ａの内径が
わずかに小さいのでシリンジチツプ４ａと筒状体
２ａとの密着状態が良好になる。 Therefore, in order to prevent wear of the syringe tip 4 and also to prevent reagent leakage due to differences in thermal expansion coefficients at low temperatures, the inner diameter of the syringe tip 4a is slightly smaller than the outer diameter of the syringe tip 4a, as shown in FIG. A syringe 1a has been proposed that includes a cylindrical body 2a made of a synthetic resin and having elasticity to the extent that it swells slightly at the portion where the syringe tip 4a is tightly inserted. If the cylindrical body 2a is made of synthetic resin, the syringe tip 4a by the cylindrical body 2a
Moreover, since there is no large difference in the coefficient of thermal expansion between the cylindrical body 2a and the syringe tip 4a, there is no leakage of reagents at low temperatures. Since this is slightly small, the close contact between the syringe tip 4a and the cylindrical body 2a is improved.
しかしながら、たとえシリンジ１ａの筒状体２
ａを合成樹脂製にしたとしても、それだけでは次
に述べるような欠点は解消されない。つまり、第
３図に示すように、シリンジチツプ４ａの先端部
には、一般に、筒状体２ａ内への挿入を容易にす
るために、筒状体２ａの内径よりも小さい径の先
端面を有する円錐台部４ｂが設けられ、またシリ
ンジチツプ４ａの中間部には筒状体２ａとの摺動
摩擦力を低減させるために切欠き部４ｃが設けら
れており、さらに、前記円錐台部４ｂおよび切欠
き部４ｃ以外には筒状体２ａの内径よりわずかに
大きい径を有する円柱部４ｄ，４ｅが設けられて
なるシリンジチツプ４ａを筒状体２ａ内に挿入す
る場合、筒状体２ａはその弾力性によつて若干ふ
くらみ、筒状体２ａとシリンジチツプ４ａとの密
着は、第３図ａ中の白抜き矢印で示すように、円
錐台部４ｂと円柱部４ｄとの接合部および円柱部
４ｅのプランジヤ３側の縁辺においてしかなされ
ていない。つまり、筒状体２ａの弾力性により、
筒状体２ａは前記接合部を支点として浮き上が
り、筒状体２ａの内壁とシリンジチツプ４ａの円
柱部４ｄの外周面との間に間隙が生ずる。そし
て、シリンジチツプ４ａは高速で筒状体２ａ内を
往復摺動する一方、筒状体２ａのふくらんだ部分
はシリンジチツプ４ａの高速移動に追随してもと
の内径に収縮しないので、第３図Ｂに示すよう
に、シリンジチツプ４ａが後退するときに、試薬
５が筒状体２ａとシリンジチツプ４ａの円柱部４
ｄとの間隙に沿つて切欠き部４ｃ内に流入し、ま
た、第３図ｃに示すように、シリンジチツプ４ａ
が前進するときに筒状体２ａとシリンジチツプ４
ａの円柱部４ｅとの間隙に沿つて流出し、結果的
に、試薬５がプランジヤ３側に漏洩してしまう。 However, even if the cylindrical body 2 of the syringe 1a
Even if a is made of synthetic resin, the following drawbacks cannot be solved by that alone. That is, as shown in FIG. 3, the tip of the syringe tip 4a generally has a tip surface with a smaller diameter than the inner diameter of the cylindrical body 2a in order to facilitate insertion into the cylindrical body 2a. A notch 4c is provided in the middle of the syringe tip 4a to reduce the sliding frictional force with the cylindrical body 2a. When inserting the syringe tip 4a, which has cylindrical parts 4d and 4e having diameters slightly larger than the inner diameter of the cylindrical body 2a other than the notch 4c, into the cylindrical body 2a, the cylindrical body 2a The cylindrical body 2a and the syringe tip 4a are slightly swollen due to their elasticity, and the cylindrical body 2a and the syringe tip 4a are in close contact with each other at the junction between the truncated conical part 4b and the cylindrical part 4d and the cylindrical part, as shown by the white arrow in FIG. 3a. This is done only at the edge of plunger 3 of 4e. In other words, due to the elasticity of the cylindrical body 2a,
The cylindrical body 2a floats up using the joint as a fulcrum, and a gap is created between the inner wall of the cylindrical body 2a and the outer peripheral surface of the cylindrical portion 4d of the syringe tip 4a. While the syringe tip 4a reciprocates within the cylindrical body 2a at high speed, the swollen portion of the cylindrical body 2a does not contract to its original inner diameter following the high speed movement of the syringe tip 4a. As shown in FIG.
The syringe tip 4a flows into the notch 4c along the gap with the syringe tip 4c, as shown in FIG.
When the cylinder moves forward, the cylindrical body 2a and the syringe tip 4
The reagent 5 flows out along the gap between the columnar part 4e and the reagent 5, and as a result, the reagent 5 leaks to the plunger 3 side.
この発明は前記事情に鑑みてなされたものであ
り、筒状体の内面とシリンジチツプ外周面との密
着面積を増大して、たとえシリンジチツプが高速
で往復摺動しても試薬が漏洩しないようにしたシ
リンジを提供することを目的とするものである。 This invention was made in view of the above-mentioned circumstances, and aims to increase the contact area between the inner surface of the cylindrical body and the outer circumferential surface of the syringe tip to prevent reagent from leaking even if the syringe tip slides back and forth at high speed. The purpose of this invention is to provide a syringe with a
次に、この発明の一実施例であるシリンジにつ
いて図面を参照しながら説明する。第４図はこの
発明の一実施例を示す斜視図である。 Next, a syringe that is an embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a perspective view showing an embodiment of the present invention.
同図において、シリンジ１０は筒状体１１とシ
リンジチツプ１２とプランジヤ１３とを具備す
る。筒状体１１は、たとえば熱膨張係数が11.7×
10-5であるTPX樹脂（商品名：三井石油化学社
製）で内径を4.9mmになるように成型したパイプ
であり、筒状体１１の先端は図示しない三方コツ
ク等に連結されることになる。シリンジチツプ１
２は、筒状体１１内に密挿した場合にふくらんだ
筒状体１１の内壁に沿つた外周面となるように丸
味をもたせたものであればどのような形状であつ
てもよいが、たとえば熱膨張係数が10×10-5であ
るフツ素樹脂たとえばテフロンを用いて次のよう
に形成することができる。すなわち、第５図に示
すように、円柱体を成型して、円周上を切欠いた
切欠部１２Ｂを介して先端部１２Ａと後端部１２
Ｃとに分け、全体を４隅を所定曲率で面取りした
形状に形成する。先端部１２Ａにおける先端面１
２ａから切欠部１２Ｂに至る周側面１２ｂには丸
味が形成されており、また後端部１２ｃにおける
後縁外周面１２ｃには円弧が形成されている。各
部の寸法として、たとえば、全長L1が６mm、最
大直径L2が4.95mm、先端部１２Ａの長さL3が２
mm、切欠部１２Ｂの長さL4が1.5mm、後端部の長
さL5が2.5mm、先端面１２ａの直径L6が２mm、切
欠部１２Ｂの最深部における直径L7が４mm、後
縁外周面１２ｃの円弧Ｒは１mmである。なお、前
記のように成型してなるシリンジチツプ１２の後
端にはプランジヤ１３が適宜の方法により、たと
えば螺合あるいは接着剤を介して嵌合することに
より結合されている。シリンジチツプ１２の先端
部１２Ａの周側面１２ｂには丸味が形成されてい
るので、筒状体１１内にシリンジチツプ１２を密
挿すると、筒状体１１はその弾力性によつてシリ
ンジチツプ１２の前記丸味に従つてふくらみ、シ
リンジチツプ１２の丸味を有する周側面１２ｂと
面接触するようになる。しかも、後端部１２Ｃに
おいては、後縁外周面１２ｃに円弧が形成されて
いるので、ふくらんだ筒状体１１は外周縁の円弧
に従つて面接触しつつ収縮し、もとの内径となる
ことができる。勿論、シリンジチツプ１２の切欠
部１２Ｂ端部から前記後縁外周面１２ｃに至る周
側面においても筒状体１１は面接触している。し
たがつて、たとえ筒状体１１内でシリンジチツプ
１２を高速で往復摺動させたとしても、常に筒状
体１１の内壁がシリンジチツプ１２と面接触して
いるので、吸引吐出される試薬がプランジヤ１３
側へ漏洩することはない。また筒状体１１は、
TPX樹脂製のパイプであるから、シリンジチツ
プ１２の移動に追随してふくらみ、あるいは収縮
することができる。したがつて、シリンジチツプ
１２の先端部１２Ａの周側面１２ａと筒状体１１
の内壁との間に間隙が生ずることもなく、試料が
切欠部１２Ｂに漏洩することもない。 In the figure, a syringe 10 includes a cylindrical body 11, a syringe tip 12, and a plunger 13. For example, the cylindrical body 11 has a coefficient of thermal expansion of 11.7×
10 -5 TPX resin (product name: Mitsui Petrochemical Co., Ltd.) is molded to have an inner diameter of 4.9 mm, and the tip of the cylindrical body 11 is connected to a three-way socket (not shown). Become. Syringe tip 1
2 may have any shape as long as it has a rounded shape so that when it is closely inserted into the cylindrical body 11, the outer peripheral surface is bulged along the inner wall of the cylindrical body 11. For example, it can be formed using a fluororesin such as Teflon having a coefficient of thermal expansion of 10×10 −5 as follows. That is, as shown in FIG. 5, a cylindrical body is molded, and a distal end portion 12A and a rear end portion 12 are formed through a notch portion 12B cut out on the circumference.
C, and the whole is formed into a shape with four corners chamfered at a predetermined curvature. Tip surface 1 in tip portion 12A
The circumferential side surface 12b extending from the cutout portion 2a to the notch portion 12B is rounded, and the rear edge outer circumferential surface 12c at the rear end portion 12c is formed into an arc. As for the dimensions of each part, for example, the total length L 1 is 6 mm, the maximum diameter L 2 is 4.95 mm, and the length L 3 of the tip part 12A is 2 mm.
mm, the length L 4 of the notch 12B is 1.5 mm, the length L 5 of the rear end is 2.5 mm, the diameter L 6 of the tip surface 12a is 2 mm, the diameter L 7 at the deepest part of the notch 12B is 4 mm, rear The arc R of the edge outer peripheral surface 12c is 1 mm. A plunger 13 is coupled to the rear end of the syringe tip 12 molded as described above by an appropriate method, for example, by screwing or fitting through an adhesive. The circumferential side surface 12b of the distal end 12A of the syringe tip 12 is rounded, so when the syringe tip 12 is tightly inserted into the cylindrical body 11, the cylindrical body 11 has elasticity that allows the syringe tip 12 to It swells according to the roundness and comes into surface contact with the rounded peripheral side surface 12b of the syringe tip 12. Moreover, in the rear end portion 12C, since a circular arc is formed on the rear edge outer circumferential surface 12c, the swollen cylindrical body 11 contracts while making surface contact according to the circular arc of the outer circumferential edge, and returns to the original inner diameter. be able to. Of course, the cylindrical body 11 is also in surface contact with the circumferential surface extending from the end of the notch 12B of the syringe tip 12 to the rear edge outer circumferential surface 12c. Therefore, even if the syringe tip 12 is slid back and forth within the cylindrical body 11 at high speed, the inner wall of the cylindrical body 11 is always in surface contact with the syringe tip 12, so that the reagent being sucked and discharged is plunger 13
It will not leak to the other side. Further, the cylindrical body 11 is
Since the pipe is made of TPX resin, it can swell or contract as the syringe tip 12 moves. Therefore, the circumferential side surface 12a of the distal end portion 12A of the syringe tip 12 and the cylindrical body 11
There is no gap between the sample and the inner wall of the cutout 12B, and the sample does not leak into the notch 12B.
以上、この発明の一実施例について説明した
が、この発明は前記実施例に限定されるものでは
なく、この発明の要旨の範囲内で種々の変形例を
包含することは言うまでもない。たとえば、筒状
体を、ポリプロピレン、ポリアセタール、シリコ
ンゴムあるいはフツ素樹脂などの適度の弾力性お
よび耐酸耐アルカリ性の材料で成型してもよい
し、また、シリンジチツプを成型容易で耐酸耐ア
ルカリ性の材料たとえばセラミツクスなどで成型
してもよい。 Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the embodiment described above, and includes various modifications within the scope of the gist of the invention. For example, the cylindrical body may be molded from a material with appropriate elasticity and acid and alkali resistance, such as polypropylene, polyacetal, silicone rubber, or fluororesin, and the syringe tip may be molded from a material that is easy to mold and has acid and alkali resistance. For example, it may be molded from ceramics or the like.
以上、詳述したこの発明によると次のような効
果を奏することができる。すなわち、シリンジチ
ツプの外周面と筒状体の内壁面とが面接触してい
るので、たとえシリンジチツプを高速で筒状体内
を往復摺動させても、プランジヤ側への試薬の漏
出を防止することができる。しかもシリンジチツ
プの外周面は筒状体の内壁面に突接するエツジを
なくして滑らかな丸味となるように形成されてい
るので、筒状体へのエツジによる応力集中がな
く、それだけ筒状体の永久変形を防止することが
できる。また、シリンジチツプの材質と筒状体の
材質との熱膨張率に大きな相違がないので、温度
の高低により、筒状体内へのシリンジチツプの密
挿状態が甘くなつて試薬が漏洩することもない。
これに加えて、シリンジチツプの駆動力も従来の
ものより小さく１Kg程度のもので十分であり、耐
摩耗性も強く30万乃至100万サイクルの使用に耐
え、製造コストも従来のものの1/20となり、安価
に提供することができる利点がある。 According to the invention described in detail above, the following effects can be achieved. In other words, since the outer peripheral surface of the syringe tip and the inner wall surface of the cylindrical body are in surface contact, even if the syringe tip is slid back and forth within the cylindrical body at high speed, leakage of reagent to the plunger side is prevented. be able to. In addition, the outer circumferential surface of the syringe tip is formed to have a smooth roundness without any edges that come into contact with the inner wall surface of the cylindrical body, so there is no stress concentration due to the edges on the cylindrical body. Permanent deformation can be prevented. In addition, since there is no large difference in thermal expansion coefficient between the material of the syringe tip and the material of the cylindrical body, the syringe tip may not be tightly inserted into the cylindrical body due to high or low temperatures, and the reagent may leak. do not have.
In addition, the driving force of the syringe tip is smaller than conventional ones, at around 1 kg, which is sufficient, it has strong wear resistance and can withstand 300,000 to 1 million cycles, and the manufacturing cost is 1/20 of that of conventional ones. , which has the advantage of being able to be provided at low cost.
第１図および第２図は従来のシリンジを示す断
面図、第３図は従来のシリンジの欠点を示すため
の全断面斜視図、第４図はこの発明の一実施例で
あるシリンジを示す全断面斜視図並び第５図はシ
リンジチツプの形状を示すための説明図である。
１０…シリンジ、１１…筒状体、１２…シリン
ジチツプ、１３…プランジヤ。
1 and 2 are sectional views showing a conventional syringe, FIG. 3 is a full sectional perspective view showing the drawbacks of the conventional syringe, and FIG. 4 is a full sectional view showing a syringe that is an embodiment of the present invention. The cross-sectional perspective view and FIG. 5 are explanatory views showing the shape of the syringe tip. 10... Syringe, 11... Cylindrical body, 12... Syringe tip, 13... Plunger.
Claims (1)
筒状体内を往復運動することにより、試薬を吸引
吐出するシリンジにおいて、シリンジチツプの最
大直径を筒状体の内径より大きくし、かつ前記筒
状体を前記シリンジチツプの挿入部分がふくらむ
ような弾性材料で形成すると共に、シリンジチツ
プの少なくとも両端部に丸味を形成したことを特
徴とするシリンジ。1 In a syringe that aspirates and discharges a reagent by reciprocating a syringe tip attached to the tip of a plunger within a cylindrical body, the maximum diameter of the syringe tip is made larger than the inner diameter of the cylindrical body, and the cylindrical body is inserted into the syringe. 1. A syringe characterized in that the insertion portion of the tip is made of an elastic material that bulges, and at least both ends of the syringe tip are rounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4049281A JPS57156561A (en) | 1981-03-23 | 1981-03-23 | Syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4049281A JPS57156561A (en) | 1981-03-23 | 1981-03-23 | Syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57156561A JPS57156561A (en) | 1982-09-27 |
| JPH0225125B2 true JPH0225125B2 (en) | 1990-05-31 |
Family
ID=12582068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4049281A Granted JPS57156561A (en) | 1981-03-23 | 1981-03-23 | Syringe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57156561A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS535688A (en) * | 1976-07-05 | 1978-01-19 | Hitachi Ltd | Liquid inhaler-effuser |
-
1981
- 1981-03-23 JP JP4049281A patent/JPS57156561A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS535688A (en) * | 1976-07-05 | 1978-01-19 | Hitachi Ltd | Liquid inhaler-effuser |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57156561A (en) | 1982-09-27 |
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