JPS6058652B2 - dental treatment instruments - Google Patents
dental treatment instrumentsInfo
- Publication number
- JPS6058652B2 JPS6058652B2 JP56100608A JP10060881A JPS6058652B2 JP S6058652 B2 JPS6058652 B2 JP S6058652B2 JP 56100608 A JP56100608 A JP 56100608A JP 10060881 A JP10060881 A JP 10060881A JP S6058652 B2 JPS6058652 B2 JP S6058652B2
- Authority
- JP
- Japan
- Prior art keywords
- ring
- steel ball
- main body
- rear end
- retaining ring
- 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
Links
Landscapes
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Description
【発明の詳細な説明】
この発明は、ハンドピース等の歯科治療器具に”関し
、特に先端頭部から照射する光によつて口腔内の患部を
照明して治療を行い易くすることができるハンドピース
等の歯科治療器具に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to dental treatment instruments such as handpieces, and in particular to a handpiece that can illuminate an affected area in the oral cavity with light emitted from the tip of the head to facilitate treatment. The present invention relates to dental treatment instruments such as pieces.
従来ハンドピース等の歯科治療器具にあつて・は、先
端頭部から光を照射する際には外部に設けられた光源と
、歯科治療器具の先端部との間を長尺なオプチカルフア
イバーで導光することによつて光を歯科治療器具の先端
から照射するようにしていた。Conventionally, for dental treatment instruments such as handpieces, when irradiating light from the tip head, a long optical fiber is used to guide the light between the external light source and the tip of the dental treatment instrument. By emitting light, the light was irradiated from the tip of the dental treatment instrument.
しかしながらこのような構成によれば、かなりの長さの
オプチカルフアイバーを用いなければならないために治
療器具全体が高価になると共に、光の損失も大きく、ま
た治療器具本体と可撓性ホースを備えた継手部材を分離
可能に接続する構成においては、オプチカルフアイバー
の接続手段が面倒となるなどの欠陥があつた。However, with this configuration, the entire treatment device becomes expensive because a considerable length of optical fiber must be used, and there is also a large loss of light. In the structure in which the joint members are connected in a separable manner, there are drawbacks such as a complicated means for connecting the optical fibers.
さらにまた、従来治療器具本体の操作時に可撓性ホース
がねじれたり或いはそのねじれにより治療器具本体の操
作性が損われたりしないように、治療器具本体と可撓性
ホースを導出した継手部材とを着脱並ひに回転可能に接
続する接続手段は例えば実開昭５１−９９９９４号公報
において公知であるが、この構成によれば、接続操作が
不便であるという欠陥を有する。Furthermore, in order to prevent the flexible hose from twisting during operation of the conventional treatment device body, or to prevent the twisting from impairing the operability of the treatment device body, the treatment device body and the joint member from which the flexible hose is led out are connected. A connecting means for rotatably connecting and attaching/detachable is known, for example, in Japanese Utility Model Application Laid-Open No. 51-99994, but this configuration has the drawback that the connection operation is inconvenient.
この発明は前記のような従来のもののもつ欠点を改善し
たもので、以下図面に示す実施例に基づいてこの発明を
説明する。This invention improves the drawbacks of the conventional ones as described above, and will be explained below based on the embodiments shown in the drawings.
この歯科治療器具は、例えば先端に加圧空気により駆動
される駆動部を有する本体Ａと、後端に可撓性ホースを
取付けた継手部材Ｂとから構成されている。This dental treatment instrument is composed of, for example, a main body A having a drive section driven by pressurized air at its tip, and a joint member B having a flexible hose attached to its rear end.
前記本体Ａは第２図で示すように軸筒５によつて形成さ
れ、その後方内部に、先端が本体Ａの先端部まで延びて
いるオプチカルフアイバー１の後端部が中心位置で保持
部材３により保持されており、かつ給水及び給気用の配
管系２，２を前方に導出すると共に、後方内部に前記配
管系２，２と連通する嵌合凹部４ａを有した嵌合筒体４
が設けられている。前記嵌合凹部４ａはその先．端に軸
心に沿つて貫通する小径の通孔４ｂを有しており、この
通孔４ｂ内に前記オプチカルフアイバー１の後端部が臨
んでいる。また前記嵌合筒体４の後端には、肉薄に形成
された突リング４ｃが延長されており、その外周に嵌合
筒体４と同心円Ｓ状に接続筒６が設けられ、これらが外
筒５の後端内周に螺合された締付リング７によつて軸筒
５に固着され、かつ前記接続筒６の外周囲には環状溝６
ａが形成されている。一方継手部材Ｂは、第３図に示す
ように、外周４適所に周溝８を形成し、該周溝８内に気
液密用のＯリングを嵌合して前記本体Ａの嵌合凹部３内
に前半部が回転自在に嵌合接続される挿入筒体１０と、
この挿入筒体１０の外側後半部に同心円状に設けられ、
前方にそれよりも肉薄で前記本体Ａの接続筒６の外径寸
法よりやや大きい内径を有した保持リング１１を、後方
に肉薄に形成された取付リング１「を夫々突設した外挿
管１２と、この外挿管１２と前記挿入筒体１０との間の
空隙内に位置して軸方向に摺動可能で前記接続筒６と略
同一の太さを有するスライドリング１３と、前記外挿管
１２に前記保持リング１１の周囲を包囲するように軸線
方向に摺動可能に保持された操作リン）グ１４と、前記
外挿管１２の後部にねじ螺合したカバーリング１５とか
ら構成されている。As shown in FIG. 2, the main body A is formed by a shaft tube 5, and a holding member 3 is located inside the rear end of the optical fiber 1, with the rear end of the optical fiber 1 extending to the front end of the main body A at the center position. A fitting cylindrical body 4 which is held by a pipe system 2, 2 for water supply and air supply and has a fitting recess 4a which leads out the piping systems 2, 2 for water supply and air supply to the front and which communicates with the piping systems 2, 2 at the rear inside.
is provided. The fitting recess 4a is located at the tip thereof. It has a small diameter through hole 4b that penetrates along the axis at the end, and the rear end of the optical fiber 1 faces into this through hole 4b. Further, a thin protrusion ring 4c is extended from the rear end of the fitting cylinder 4, and a connecting cylinder 6 is provided on the outer periphery of the ring 4c in an S-shape concentric with the fitting cylinder 4. It is fixed to the shaft cylinder 5 by a tightening ring 7 screwed onto the inner periphery of the rear end of the cylinder 5, and an annular groove 6 is formed around the outer periphery of the connecting cylinder 6.
a is formed. On the other hand, as shown in FIG. 3, the joint member B has a circumferential groove 8 formed at a suitable location on the outer periphery, and an air-liquid tight O-ring is fitted into the circumferential groove 8 to fit into the fitting recess of the main body A. an insertion cylinder 10 whose front half is rotatably fitted into and connected to the inside of the insertion cylinder 3;
Provided concentrically in the outer rear half of the insertion cylinder 10,
A retaining ring 11 having a thinner wall and an inner diameter slightly larger than the outer diameter of the connecting tube 6 of the main body A is provided at the front thereof, and an outer intubation tube 12 having a thinner mounting ring 1' projecting from the rear. , a slide ring 13 that is located in the gap between the outer tube 12 and the insertion tube 10, is slidable in the axial direction, and has approximately the same thickness as the connecting tube 6; It is comprised of an operating ring 14 which is slidably held in the axial direction so as to surround the periphery of the retaining ring 11, and a cover ring 15 which is screwed onto the rear part of the outer intubation tube 12.
前記操作リング１４及びスライドリング１３はそれぞれ
コイルばね１６，１７によつて常時前方へ付勢されてお
り、また前記外挿管１２の先端保・持リング１１には円
周方向に複数の貫通孔１８が開設され、この貫通孔１８
に外挿管１２の肉厚よりも大きい径をもつ鋼球１９がそ
れぞれ嵌合保持されていて、通常はこの鋼球１９が外挿
管１２の内側に位置するスライドリング１３の外周面に
当”接して外方へ押上げられている。The operating ring 14 and the slide ring 13 are always urged forward by coil springs 16 and 17, respectively, and the distal end retaining ring 11 of the external tube 12 is provided with a plurality of through holes 18 in the circumferential direction. is opened, and this through hole 18
A steel ball 19 having a diameter larger than the wall thickness of the outer tube 12 is fitted and held in each of the outer tubes, and normally these steel balls 19 come into contact with the outer peripheral surface of the slide ring 13 located inside the outer tube 12. and is pushed outward.
前記外挿管１２の前半部外側に位置する操作リング１４
は、その前端部内周面に内径を拡大して大径部２０が形
成され、この大径部２０は傾斜段部２１を介して小径部
２２と連設している。an operating ring 14 located outside the front half of the external intubation tube 12;
A large diameter portion 20 is formed by enlarging the inner diameter on the inner circumferential surface of the front end thereof, and this large diameter portion 20 is connected to a small diameter portion 22 via an inclined stepped portion 21 .
そして通常は前記傾斜段部２１が前記スライドリング１
３により押上げられて大径部２０内に受容されている鋼
球１９の露出部にコイルばね１６の弾力により当接し、
これによつて操作リング１４が外挿管１２から前方に離
脱するのを防止している。また前記スライドリング１３
の後端には内側に向けて突出する内鍔２３を有し、この
内鍔２３が通常は挿入筒体１０の外周に設けたストッパ
リング２４に当接して前方への離脱が防止されている。
前記挿入筒体１０の内部には、その先端部で開口し、本
体Ａの配管系２と適宜連通する給気路２５および給水路
２６が設けられると共に、中心部には電源コード２７挿
入用の孔２８が設けられ、そしてその先端には電源コー
ド２７と接続されたソケット２９を介して前記通孔４ｂ
内に受容される電球３０が設けられている。なお３１は
前記給水路２６と接続された給水接続子で、これに給水
ホース３「が接続される。Usually, the inclined step portion 21 is the same as the slide ring 1.
3, and is brought into contact with the exposed portion of the steel ball 19 that is received in the large diameter portion 20 by the elasticity of the coil spring 16,
This prevents the operating ring 14 from detaching forward from the external intubation tube 12. In addition, the slide ring 13
The rear end has an inner flange 23 that protrudes inward, and this inner flange 23 normally comes into contact with a stopper ring 24 provided on the outer periphery of the insertion cylinder 10 to prevent it from coming off forward. .
Inside the insertion cylinder 10, there are provided an air supply path 25 and a water supply channel 26 that are open at the tip and communicate with the piping system 2 of the main body A as appropriate, and a power cord 27 for insertion is provided in the center. A hole 28 is provided at the tip of the hole 28, and a socket 29 connected to the power cord 27 is connected to the through hole 4b.
A light bulb 30 is provided to be received within. Note that 31 is a water supply connector connected to the water supply channel 26, and a water supply hose 3'' is connected to this.
３２は前記給気路２５と接続された給気接続子で、これ
に給気ホース３２″が接続される。32 is an air supply connector connected to the air supply path 25, and an air supply hose 32'' is connected to this.
３３は前記外挿管１２の取付リング１「に接続された可
撓性ホースで、内部に各ホース３「と３２″及び電源コ
ードが内装されている。A flexible hose 33 is connected to the attachment ring 1'' of the external intubation tube 12, and each hose 3'' and 32'' and a power cord are housed inside.
３４は操作リング１４の小径部２１の後位に設けたスト
ッパーである。34 is a stopper provided at the rear of the small diameter portion 21 of the operating ring 14.
而して本体Ａを継手部材Ｂから取り外した状態では、第
３図に示すようにスライドリング１３が鋼球１９を外方
へ押上げ、かつ鋼球１９は操作リング１４の大径部２０
内に位置しており、この状態から本体Ａを継手部材Ｂに
連結するときは、嵌合凹部３内に挿入筒体１０を押し込
む。When the main body A is removed from the joint member B, the slide ring 13 pushes the steel balls 19 outward as shown in FIG.
When connecting the main body A to the coupling member B from this state, the insertion cylinder 10 is pushed into the fitting recess 3.
すると接続筒６がスライドリング１３をコイルばね１７
に抗して押圧し、鋼球１９は接続筒６に設けた環状溝７
内に落ち込んで係合すると共に、操作リング１４の傾斜
段部２１が鋼球１９より外されるから該操作リング１４
は前進して小径部２２により鋼球１９の外面が押えられ
、従つて鋼球１９と環状溝７との係合状態は確実となり
、またストッパー３４が鋼球１９に当接する。この様に
して挿入筒体１０は挿合筒体４内にＯリング９を介して
回転自在に嵌合され、また外挿管１２は接続筒６に対し
鋼球１９を介して回転自在に連結され、更に通孔４ｂ内
で、オプチカルフアイバー１の後端面と電求３０とが対
向する。そして給気ホース３２″からの加圧空気は給気
路２５を、また給水ホース３「からの水は給水路２６を
介してそれぞれ本体Ａに供給されると共に、電源コード
２７を介して点燈された電球３０の光はオプチカルフア
イバー１を通つて本体Ａの先端部に達し、口腔内の患部
を照明する。Then, the connecting tube 6 connects the slide ring 13 to the coil spring 17.
The steel ball 19 is pressed against the annular groove 7 provided in the connecting tube 6.
At the same time, the inclined stepped portion 21 of the operating ring 14 is removed from the steel ball 19, so that the operating ring 14
moves forward, and the outer surface of the steel ball 19 is pressed by the small diameter portion 22, so that the engagement state between the steel ball 19 and the annular groove 7 is ensured, and the stopper 34 comes into contact with the steel ball 19. In this way, the insertion tube 10 is rotatably fitted into the insertion tube 4 via the O-ring 9, and the outer tube 12 is rotatably connected to the connection tube 6 via the steel ball 19. Furthermore, within the through hole 4b, the rear end surface of the optical fiber 1 and the electric wire 30 face each other. The pressurized air from the air supply hose 32'' is supplied to the main body A through the air supply path 25, and the water from the water supply hose 3'' is supplied to the main body A through the supply channel 26, and the light is turned on through the power cord 27. The light from the light bulb 30 passes through the optical fiber 1 and reaches the tip of the main body A, illuminating the affected area in the oral cavity.
つぎに本体Ａを継手部材Ｂから分離するときは、操作リ
ング１４をコイルばね１６に抗して後方へ引けは鋼球１
９は大径部２０と対向し、この状態から本体Ａを前方へ
牽引すると鋼球１９と環状溝７との係合が解かれ、該本
体Ａを引抜くことができる。Next, when separating the main body A from the joint member B, the operating ring 14 is pulled backward against the coil spring 16, and the steel ball 1
9 faces the large diameter portion 20, and when the main body A is pulled forward from this state, the engagement between the steel ball 19 and the annular groove 7 is released, and the main body A can be pulled out.
この引抜き操作に伴つてスライドリング１３がコイルば
ね１７により前進してその外周面で再び鋼球１９を押上
げ、かつ操作リング１４は後退した状態で鋼球１９と傾
斜段部２１とが当接して、第３図に示す様に嵌合筒体４
と挿入筒体１０とが嵌合し得る状態となる。この発明は
前記したように構成されるものであるから、本体と可撓
性ホースを備えた継手部材との接続及び分離操作が極め
て簡単に行うことができて、電球を交換などに便利であ
ると共に、本体の使用態様如何にかかわらず可撓性ホー
スがねじれる惧れもなく、従つて本体による治療操作も
容易となり、また本体側にオプチカルフアイバーを、継
手部材側に光を供給する電球を夫々備えたので、オプチ
カルフアイバーが短尺ですみ、導光系の構造も簡単とな
り、製品が安価に得られると共に、照明効果も良好とな
るなどの利点を有する。Along with this pulling operation, the slide ring 13 is moved forward by the coil spring 17 and pushes up the steel ball 19 again with its outer peripheral surface, and the steel ball 19 and the inclined stepped portion 21 come into contact with each other while the operating ring 14 is retracted. Then, as shown in FIG.
and the insertion cylinder 10 are now in a state where they can be fitted. Since this invention is configured as described above, the connection and separation operations between the main body and the joint member provided with the flexible hose can be performed extremely easily, which is convenient for replacing light bulbs, etc. At the same time, there is no fear that the flexible hose will be twisted regardless of how the main body is used, and treatment operations using the main body are therefore easy.In addition, an optical fiber is installed on the main body side, and a light bulb that supplies light is installed on the joint member side. As a result, the optical fiber can be shortened, the structure of the light guide system can be simplified, the product can be obtained at low cost, and the lighting effect can be improved.
図面は本発明の実施例を示し、第１図は連結した状態を
示す縦断正面図、第２図は本体の一部を示す縦断正面図
、第３図は継手部材を示す一部縦断正面図である。
図面において、Ａは治療器具本体、Ｂは継手部材、１は
オプチカルフアイバー、４は嵌合筒体、５は軸筒、６は
接続筒、７は環状溝、１０は挿入筒体、１１は保持リン
グ、１「は取付リング、１２は外挿管、１３はスライド
リング、１４は操作リング、１６，１７はコイルばね、
１８は貫通“孔、１９は鋼球、２０は大径部、２１は傾
斜段部、２２は小径部、２５は給気路、２６は給水路、
２７は電源コード、２９はソケット、３０は電球、３「
は給水ホース、３２″は給気ホース、３３は可撓性ホー
スである。The drawings show embodiments of the present invention; FIG. 1 is a longitudinal sectional front view showing a connected state, FIG. 2 is a longitudinal sectional front view showing a part of the main body, and FIG. 3 is a partially longitudinal sectional front view showing a joint member. It is. In the drawings, A is the therapeutic instrument body, B is the joint member, 1 is the optical fiber, 4 is the fitting cylinder, 5 is the shaft cylinder, 6 is the connecting cylinder, 7 is the annular groove, 10 is the insertion cylinder, and 11 is the holding cylinder. ring, 1" is a mounting ring, 12 is an external tube, 13 is a slide ring, 14 is an operation ring, 16 and 17 are coil springs,
18 is a through hole, 19 is a steel ball, 20 is a large diameter portion, 21 is an inclined stepped portion, 22 is a small diameter portion, 25 is an air supply path, 26 is a water supply channel,
27 is a power cord, 29 is a socket, 30 is a light bulb, 3"
32'' is a water supply hose, 32'' is an air supply hose, and 33 is a flexible hose.
Claims (1)
線に沿つて延び前端に通孔を連通し後端で開口する嵌合
凹部と、この嵌合凹部と連通して先端方向に延びる流体
の配管系と先端方向に延び後端が前記通孔内に臨む光導
系とを備え、かつ前記嵌合凹部の開口端に位置してそれ
と同心円状で軸筒後端より突出すると共に、外周面に環
状溝を形成した接続筒を設けて成る嵌合筒体を備えて成
り、また前記治療器具本体に接続される継手部材が、内
部に前記本体の配管系と連通し後端に供給ホースを連結
した流体通路を有して前記嵌合凹部に嵌合する挿入筒体
と、その挿入筒体の後端外周に設けられそれとの間に空
隙が存するように前方に延びると共に内径が前記固定リ
ングの侵入を許容する大きさをもつ保持リングを有し、
かつ後端に可撓ホースを連結した外挿管と、この保持リ
ングに設けられた複数の貫通孔に嵌合保持されかつ前記
保持リングの厚味よりも大きい径をもつ鋼球と、前記空
隙内に位置し外径が前記保持リングの内径とほゞ等しく
かつ前記接続管の端面と当接する厚味を有すると共に前
記貫通孔の位置まで前進可能なスライドリングと、この
スライドリングを常時前進方向に弾圧するスプリングと
、前記外挿管の外周に軸方向に摺動可能に嵌合され、前
端内部に、鋼球がスライドリングの外周面により押し上
げられたとき該鋼球の嵌合を許容する大径部と、鋼球が
前記接続筒の環状溝に係合したときそれとの間で鋼球を
挾持する小径部と、これらを連結する傾斜段部と、前記
小径部の後部に位置して鋼球と当接するストッパーとを
夫々有した操作リングと、この操作リングと前記保持リ
ングとの間に形成された空隙内に位置して該操作リング
を常時前方に弾圧するスプリングと、前記挿入筒体の先
端に設けられ該筒体内に導かれた電源コードに接続され
た電球とを備えて成り、前記本体と継手部材とを接続し
たとき前記通孔内において、光導系の後端面と電球とが
対向するように構成したことを特徴とする歯科治療器具
。 ２ 前記配管系及び流体通路を２系統とし、その一方を
加圧空気用とし、その他方を水用とした特許請求の範囲
第１項記載の歯科治療器具。 ３ 本体と接続筒の外径寸法をほゞ等しく形成した特許
請求の範囲第１項または第２項記載の歯科治療器具。[Scope of Claims] 1. A fitting recess that extends inside along the axis, communicates with a through hole at the front end, and opens at the rear end, in the rear part of the barrel constituting the treatment instrument main body, and communicates with the fitting recess. and a fluid piping system extending in the distal direction, and a light guide system extending in the distal direction and having a rear end facing into the through hole, and a rear end of the shaft cylinder located at the open end of the fitting recess and concentric therewith. The fitting cylinder is provided with a connecting cylinder that protrudes further and has an annular groove formed on its outer circumferential surface, and a joint member connected to the treatment instrument main body communicates with the piping system of the main body inside. an insertion cylinder having a fluid passage connected to a supply hose at its rear end and fitting into the fitting recess; a retaining ring that extends and has an inner diameter that is sized to allow entry of the fixing ring;
and an external tube with a flexible hose connected to the rear end, a steel ball fitted and held in a plurality of through holes provided in the retaining ring and having a diameter larger than the thickness of the retaining ring, and a steel ball in the gap. a slide ring located in the retaining ring, the slide ring having an outer diameter substantially equal to the inner diameter of the retaining ring and thick enough to come into contact with the end surface of the connecting pipe, and capable of moving forward to the position of the through hole; a spring that presses; and a large diameter that is slidably fitted in the axial direction on the outer periphery of the outer tube and that allows the steel ball to fit into the front end when the steel ball is pushed up by the outer circumferential surface of the slide ring. a small diameter part that clamps the steel ball when the steel ball engages with the annular groove of the connecting tube, an inclined step part that connects these parts, and a steel ball located at the rear of the small diameter part. an operating ring having a stopper that abuts the operating ring; a spring that is located in a gap formed between the operating ring and the retaining ring and always presses the operating ring forward; a light bulb connected to a power cord provided at the tip and led into the cylindrical body, and when the main body and the joint member are connected, the rear end surface of the light guide system and the light bulb face each other in the through hole. A dental treatment instrument characterized by being configured to. 2. The dental treatment instrument according to claim 1, wherein the piping system and fluid passage are two systems, one for pressurized air and the other for water. 3. The dental treatment instrument according to claim 1 or 2, wherein the main body and the connecting tube have approximately the same outer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56100608A JPS6058652B2 (en) | 1981-06-30 | 1981-06-30 | dental treatment instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56100608A JPS6058652B2 (en) | 1981-06-30 | 1981-06-30 | dental treatment instruments |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS584545A JPS584545A (en) | 1983-01-11 |
| JPS6058652B2 true JPS6058652B2 (en) | 1985-12-20 |
Family
ID=14278559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56100608A Expired JPS6058652B2 (en) | 1981-06-30 | 1981-06-30 | dental treatment instruments |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6058652B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59119807U (en) * | 1983-01-31 | 1984-08-13 | 株式会社吉田製作所 | dental treatment instruments |
| JP5193508B2 (en) * | 2007-06-15 | 2013-05-08 | 株式会社モリタ製作所 | Connection member and dental handpiece device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57134152A (en) * | 1981-02-06 | 1982-08-19 | Kaltenbach & Voigt | Dental handpiece |
| JPS588069U (en) * | 1981-07-10 | 1983-01-19 | 株式会社日立製作所 | absorption refrigerator |
-
1981
- 1981-06-30 JP JP56100608A patent/JPS6058652B2/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57134152A (en) * | 1981-02-06 | 1982-08-19 | Kaltenbach & Voigt | Dental handpiece |
| JPS588069U (en) * | 1981-07-10 | 1983-01-19 | 株式会社日立製作所 | absorption refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS584545A (en) | 1983-01-11 |
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