JPH0435562Y2 - - Google Patents
Info
- Publication number
- JPH0435562Y2 JPH0435562Y2 JP1984175680U JP17568084U JPH0435562Y2 JP H0435562 Y2 JPH0435562 Y2 JP H0435562Y2 JP 1984175680 U JP1984175680 U JP 1984175680U JP 17568084 U JP17568084 U JP 17568084U JP H0435562 Y2 JPH0435562 Y2 JP H0435562Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- band ring
- annular groove
- skirt
- piston crown
- 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
- 239000000919 ceramic Substances 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 description 9
- 239000000567 combustion gas Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案はセラミツクスを利用した内燃機関にお
ける断熱ピストンに関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an adiabatic piston for an internal combustion engine using ceramics.
［従来の技術］
従来から提案されているセラミツクスを利用し
た断熱内燃機関は、ピストン冠部、シリンダライ
ナ、シリンダヘツド、フアイヤデツキなどの燃焼
ガスに晒される壁部を、チツ化ケイ素、炭化ケイ
素などのセラミツクスから成形し、ピストン本
体、シリンダ本体、シリンダヘツドなどの金属構
造体に結合している。[Prior Art] In adiabatic internal combustion engines using ceramics that have been proposed in the past, walls exposed to combustion gas, such as piston crowns, cylinder liners, cylinder heads, and fire decks, are made of silicon oxide, silicon carbide, etc. It is molded from ceramics and bonded to metal structures such as the piston body, cylinder body, and cylinder head.
実開昭55−6479号公報に開示されるように、金
属製のスカート部の上側に、セラミツクス製のピ
ストン冠部を重ね合せ、結合ボルトにより互いに
締結してなる断熱ピストンでは、燃焼室の燃焼ガ
スがボルト穴を経てクランク室へ洩れるのを防止
するために、ボルトの頭部とピストン冠部との間
に一般的なシール部材を装着するだけで十分であ
る。 As disclosed in Japanese Utility Model Application Publication No. 55-6479, an adiabatic piston in which a piston crown made of ceramic is superimposed on the upper side of a metal skirt and fastened to each other with connecting bolts prevents combustion in the combustion chamber. In order to prevent gases from escaping through the bolt hole into the crank chamber, it is sufficient to fit a conventional seal between the bolt head and the piston crown.
しかし、実開昭54−161411号公報に開示される
ように、スカート部とピストン冠部との間に断熱
空部を設けることにより、ピストン冠部からスカ
ート部への伝熱量を減じる断熱ピストンでは、ス
カート部とピストン冠部との重合せ部の周縁側
に、別のシール部材またはパツキンを介装する必
要がある。この場合、一般的な断熱パツキンで
は、ピストンの上下慣性力、燃焼ガス圧力の変
化、ピストン冠部とスカート部の熱膨張差などか
らへたりが生じて密封性能が低下し、燃焼ガスの
一部が断熱空部へ浸入すると、圧縮比が低下し、
機関出力が低下するという問題がある。 However, as disclosed in Japanese Utility Model Application No. 54-161411, an adiabatic piston that reduces the amount of heat transferred from the piston crown to the skirt by providing an insulating cavity between the skirt and the piston crown , it is necessary to interpose another sealing member or packing on the peripheral edge side of the overlapping portion of the skirt portion and the piston crown portion. In this case, with a typical heat-insulating seal, the sealing performance deteriorates due to sagging due to the vertical inertia of the piston, changes in combustion gas pressure, and the difference in thermal expansion between the piston crown and skirt, and some of the combustion gas enters the adiabatic cavity, the compression ratio decreases,
There is a problem that engine output decreases.
［考案が解決しようとする問題点］
本考案の目的は上述の問題に鑑み、金属シール
部材を環状溝の周壁面に弾性的に密着させること
により、上述の諸条件に対し安定であり、ピスト
ン冠部とスカート部との重合せ面を完全に密封す
る、断熱ピストンを提供することにある。[Problems to be solved by the invention] In view of the above-mentioned problems, the purpose of the invention is to make the metal seal member elastically in close contact with the peripheral wall surface of the annular groove, thereby making the piston stable under the above-mentioned conditions. An object of the present invention is to provide a heat insulating piston that completely seals the overlapping surfaces of a crown part and a skirt part.
［問題点を解決するための手段］
上記目的を達成するために、本考案の構成は金
属製のスカート部とセラミツクス製のピストン冠
部との重合せ面の周縁側の両面にそれぞれ環状溝
を設け、前記重合せ面の中央側に断熱空部を設
け、前記環状溝に厚肉の板ばねを筒状に巻き重ね
てなる帯環を、板面が環状溝の周壁面に弾性的に
接するよう係合したものである。[Means for Solving the Problems] In order to achieve the above object, the configuration of the present invention includes annular grooves on both sides of the circumferential edge of the overlapping surface of the metal skirt and the ceramic piston crown. A heat insulating cavity is provided in the center of the overlapping surface, and a band ring is formed by winding thick leaf springs in a cylindrical shape in the annular groove, the plate surface being in elastic contact with the peripheral wall surface of the annular groove. This is how they were engaged.
［作用］
帯環は厚肉の板ばねを巻き重ねたものであるか
ら、スカート部とピストン冠部との重合せ面の両
方に設けた比較的深い環状溝へ装着すると、自ら
の拡開力または縮閉力により環状溝の周壁面によ
く密着し、重合せ面の隙間を密封する。[Function] Since the band ring is made by winding thick leaf springs, when it is attached to the relatively deep annular groove provided on both the overlapping surfaces of the skirt part and the piston crown part, the band ring will absorb its own expansion force. Alternatively, the material adheres well to the circumferential wall surface of the annular groove due to the contraction and closing force, and seals the gap between the overlapping surfaces.
［考案の実施例］
第８図はセラミツクスを用いた断熱内燃機関の
正面断面図である。普通の金属製のシリンダヘツ
ド１の下面に形成した円筒部１ａに、セラミツク
ス製のカツプ形のヘツドライナ３がガスケツト１
６を介して嵌合され、ヘツドライナ３の下面がガ
スケツト２０を介して、シリンダ本体２に嵌合し
たシリンダライナ４の上面に突き合される。シリ
ンダヘツド１から挿通した複数のボルト９をシリ
ンダ本体２へ螺合することにより、シリンダヘツ
ド１とヘツドライナ３シリンダ本体２へ結合され
る。[Embodiment of the invention] FIG. 8 is a front sectional view of an adiabatic internal combustion engine using ceramics. A cup-shaped head liner 3 made of ceramic is attached to the gasket 1 on a cylindrical portion 1a formed on the lower surface of a cylinder head 1 made of ordinary metal.
6, and the lower surface of the head liner 3 is butted against the upper surface of the cylinder liner 4 fitted to the cylinder body 2 through the gasket 20. The cylinder head 1 and head liner 3 are connected to the cylinder body 2 by screwing a plurality of bolts 9 inserted through the cylinder head 1 into the cylinder body 2.
ヘツドライナ３の上壁に、シリンダヘツド１の
吸・排気ポート１１に連なる弁座が形成され、セ
ラミツクスをコーテイングした吸・排気弁７によ
り開閉される。燃料噴射ノズル５の先端が、ヘツ
ドライナ３の上壁から燃焼室へ突出される。セラ
ミツクス製のヘツドライナ３と、セラミツクス製
のピストン冠部８とにより燃焼室が区画され、燃
焼室の主要部から離れた部分で、ヘツドライナ３
はセラミツクス製のシリンダライナ４と突き合さ
れる。 A valve seat connected to the intake/exhaust port 11 of the cylinder head 1 is formed on the upper wall of the head liner 3, and is opened and closed by an intake/exhaust valve 7 coated with ceramics. The tip of the fuel injection nozzle 5 projects from the upper wall of the head liner 3 into the combustion chamber. The combustion chamber is divided by a head liner 3 made of ceramics and a piston crown 8 made of ceramics, and the head liner 3 is separated from the main part of the combustion chamber.
is butted against a cylinder liner 4 made of ceramics.
ピストン１９はセラミツクス製のピストン冠部
８は、普通の金属製のスカート部６の位置決めピ
ン１５により決められた所定の位置に重ね合せ、
上から挿通したボルト３１にデイスタンススリー
ブ１７と皿ばね１３を外挿し、ナツト３３を締め
付けて構成される。ピストン冠部８は上面に燃料
と空気の混合を促す窪み３９を設けられ、下面中
央に円筒部３４を設けられる。スカート部６は外
周面のリング溝４２（第１図参照）にピストンリ
ング４１を装着され、上面中央に柱１０を形成さ
れる。ピストン冠部８は円筒部３４の内端面を、
スカート部６の柱１０の上面に重ね合せて、前述
のボルト３１とナツト３３により結合される。柱
１０と円筒部３４との間に断熱空部１２が形成さ
れる。必要により、円筒部３４の内端面と柱１０
の上面との間にガスケツトを介装する。 The piston crown part 8 of the piston 19 made of ceramics is overlapped at a predetermined position determined by the positioning pin 15 of the skirt part 6 made of ordinary metal,
The distance sleeve 17 and disc spring 13 are fitted onto the bolt 31 inserted from above, and the nut 33 is tightened. The piston crown portion 8 is provided with a recess 39 on the upper surface to promote mixing of fuel and air, and a cylindrical portion 34 is provided at the center of the lower surface. A piston ring 41 is mounted in a ring groove 42 (see FIG. 1) on the outer peripheral surface of the skirt portion 6, and a column 10 is formed at the center of the upper surface. The piston crown part 8 has an inner end surface of the cylindrical part 34,
The skirt portion 6 is superimposed on the upper surface of the pillar 10 and is coupled with the aforementioned bolts 31 and nuts 33. A heat insulating cavity 12 is formed between the column 10 and the cylindrical part 34. If necessary, the inner end surface of the cylindrical portion 34 and the column 10
A gasket is interposed between the upper surface of the
第１図に示すように、ピストン冠部８の下面８
ａとスカート部６の上面６ａとの重合せ部の周縁
側は、ボルト３１の締付応力を回避するために隙
間を設けられる。 As shown in FIG. 1, the lower surface 8 of the piston crown 8
A gap is provided on the peripheral edge side of the overlapping portion of the upper surface 6 a of the skirt portion 6 to avoid the tightening stress of the bolt 31 .
本考案は上述の隙間を密封することにより、断
熱空部１２への燃焼ガスの浸入を防ぎ、断熱空部
１２の断熱効果を高めるものである。このため、
スカート部６の上面６ａに環状溝２２が、ピスト
ン冠部８の下面８ａに環状溝２１がそれぞれ設け
られ、耐熱性の帯環２３を係合される。好ましく
は、スカート部６の上面６ａの周縁に段部２５
を、ピストン冠部８の下面８ａの周縁に段部２４
をそれぞれ設け、段部２５，２４にも帯環２６を
嵌装する。 The present invention prevents combustion gas from entering the heat insulating space 12 by sealing the above-mentioned gap, thereby increasing the heat insulation effect of the heat insulating space 12. For this reason,
An annular groove 22 is provided on the upper surface 6a of the skirt portion 6, and an annular groove 21 is provided on the lower surface 8a of the piston crown portion 8, and a heat-resistant band ring 23 is engaged with the annular groove 22 and the annular groove 21, respectively. Preferably, a stepped portion 25 is provided at the periphery of the upper surface 6a of the skirt portion 6.
A stepped portion 24 is attached to the periphery of the lower surface 8a of the piston crown 8.
are provided respectively, and a band ring 26 is also fitted to the stepped portions 25 and 24.
帯環２３は厚肉の板ばねを部分的に筒状に巻き
重ねて形成し、帯環２３の板面が環状溝２１，２
２の内周壁面と外周壁面の一方または両方に弾性
的に密接させる。好ましくは、帯環２３を環状溝
２１，２２の内周壁面に密接させる場合は、スカ
ート部６やピストン冠部８よりも熱膨張率の小さ
い金属で帯環２３を構成する。逆に、帯環２３を
環状溝２１，２２の外周壁面に密接させる場合
は、スカート部６やピストン冠部８よりも熱膨張
率の大きな金属で帯環２３を構成する。 The band ring 23 is formed by partially winding thick plate springs into a cylindrical shape, and the plate surface of the band ring 23 is formed by wrapping the plate springs in the annular grooves 21 and 2.
2, elastically brought into close contact with one or both of the inner circumferential wall surface and outer circumferential wall surface of No. 2. Preferably, when the band ring 23 is brought into close contact with the inner circumferential wall surfaces of the annular grooves 21 and 22, the band ring 23 is made of a metal having a smaller coefficient of thermal expansion than the skirt portion 6 and the piston crown portion 8. Conversely, when the band ring 23 is brought into close contact with the outer circumferential wall surfaces of the annular grooves 21 and 22, the band ring 23 is made of a metal having a higher coefficient of thermal expansion than the skirt portion 6 and the piston crown portion 8.
帯環２６の内径は段部２４，２５を区画する外
径と等しく構成され、帯環２６により段部２４，
２５が適当な強さに締め付けられる。帯環２６は
切欠リングであつてもよい。切欠リングの場合は
内径を段部２４，２５の外径よりも幾分小さく
し、ピストン冠部８とスカート部６に嵌合する
と、帯環２６が拡開されるように構成する。第２
図に示すように、帯環２６の端末に段部２６ａ，
２６ｂを設け、帯環２６が押し広げられても段部
２６ａ，２６ｂが互いに密接するようにする。 The inner diameter of the band ring 26 is configured to be equal to the outer diameter that partitions the step portions 24 and 25, and the band ring 26 allows the step portions 24 and 25 to be separated from each other.
25 is tightened to an appropriate strength. The band ring 26 may be a notched ring. In the case of a notched ring, the inner diameter is made somewhat smaller than the outer diameter of the stepped portions 24 and 25, and the band ring 26 is configured to expand when fitted to the piston crown portion 8 and skirt portion 6. Second
As shown in the figure, a stepped portion 26a is provided at the end of the band ring 26,
26b is provided so that the stepped portions 26a and 26b are brought into close contact with each other even when the band ring 26 is pushed apart.
第３，４図に示す第２の実施例は、内外二重に
環部２３ａ，２３ｂを巻き重ねてなる帯環２３
を、環状溝２１と環状溝２２に嵌合したものであ
る。第４図に示すように、実際には、帯環２３は
板ばねを二重に巻いて形成し、内側の端末２９ａ
と外側の端末２９ｂを先細りとなるように肉厚を
薄くし、少なくとも環部２３ｂの外周面が円形を
なすように構成する。帯環２３は自らのばね力に
より、外側の環部２３ｂを環状溝２１，２２の外
周壁面に押し付けられる。スカート部６とピスト
ン冠部８の重合せ部の周縁にも、第１図に示す実
施例と同様に、段部２５，２４に帯環２６を嵌装
する。 The second embodiment shown in FIGS. 3 and 4 is a band ring 23 formed by wrapping ring portions 23a and 23b double-layered inside and outside.
are fitted into the annular groove 21 and the annular groove 22. As shown in FIG. 4, the band ring 23 is actually formed by doubly wrapping a plate spring, and the inner end 29a
The outer end 29b is made thin so as to be tapered, and at least the outer peripheral surface of the ring portion 23b is configured to have a circular shape. The outer ring portion 23b of the band ring 23 is pressed against the outer circumferential wall surface of the annular grooves 21 and 22 by its own spring force. Similarly to the embodiment shown in FIG. 1, a band ring 26 is fitted around the stepped portions 25 and 24 around the periphery of the overlapping portion of the skirt portion 6 and the piston crown portion 8.
第５図に示す第３の実施例は、板ばねを二重に
巻き重ねて各帯環２３，２６を構成したものであ
り、原理的には第３図に示す実施例と同様であ
る。 In the third embodiment shown in FIG. 5, each band ring 23, 26 is constructed by doubly winding a leaf spring, and is similar in principle to the embodiment shown in FIG.
第６図に示す第４の実施例は、帯環２６を装着
する代りに、スカート部６の上面６ａの周縁に段
部２７を形成する一方、ピストン冠部８の下面８
ａの周縁に下方へ突出する環状突条２８を一体に
形成し、環状突条２８を段部２７に係合したもの
である。他の構成については第１図に示す実施例
と同様である。 In the fourth embodiment shown in FIG. 6, instead of attaching a band ring 26, a stepped portion 27 is formed on the periphery of the upper surface 6a of the skirt portion 6, and the lower surface 8 of the piston crown portion 8 is
An annular protrusion 28 projecting downward is integrally formed on the peripheral edge of a, and the annular protrusion 28 is engaged with the step portion 27. The other configurations are the same as the embodiment shown in FIG.
第７図に示す第５の実施例では、第３図と第６
図に示したものと同様に、板ばねを二重に巻き重
ねて帯環２３を構成し、自らの弾発力により環状
溝２１，２２の外周壁面に押し付けたものであ
る。ピストン１９の周縁で、ピストン冠部８の環
状突条２８をスカート部６の段部２７に嵌装す
る。 In the fifth embodiment shown in FIG.
Similar to what is shown in the figure, the band ring 23 is constructed by winding a leaf spring twice, and is pressed against the outer circumferential wall surface of the annular grooves 21 and 22 by its own elastic force. At the periphery of the piston 19, the annular protrusion 28 of the piston crown part 8 is fitted into the stepped part 27 of the skirt part 6.
［考案の効果］
本考案は上述のように、金属製のスカート部と
セラミツクス製のピストン冠部との重合せ面の周
縁側の両面にそれぞれ環状溝を設け、前記重合せ
面の中央側に断熱空部を設け、前記環状溝に厚肉
の板ばねを筒状に巻き重ねてなる帯環を、板面が
環状溝の周壁面に弾性的に接するよう係合したか
ら、従来のシール部材やガスケツトに比べて、ピ
ストンの往復動による慣性力、燃焼ガス圧力、結
合ボルトの締付荷重などの変化による帯環のへた
りがなく、ピストンの往復動に伴い帯環が上下に
移動しても、帯環の板面が環状溝の周壁面に弾性
的によく密接し、重合せ面の中央側に形成した断
熱空部への燃焼ガスの浸入を完全に封止する。[Effects of the invention] As described above, the present invention provides annular grooves on both sides of the circumferential edge of the overlapping surface of the metal skirt portion and the ceramic piston crown portion, and an annular groove on the center side of the overlapping surface. A heat-insulating cavity is provided, and a band ring formed by winding thick leaf springs in a cylindrical manner in the annular groove is engaged so that the plate surface is in elastic contact with the peripheral wall surface of the annular groove, which is different from the conventional sealing member. Compared to gaskets and gaskets, there is no wear on the band ring due to changes in inertia, combustion gas pressure, tightening load of connecting bolts, etc. due to the reciprocating movement of the piston, and the band ring moves up and down with the reciprocating movement of the piston. Also, the plate surface of the band ring elastically comes into close contact with the circumferential wall surface of the annular groove, completely sealing off combustion gas from entering the heat insulating cavity formed at the center of the overlapping surfaces.
帯環は自らの拡開力または縮閉力により弾性的
に環状溝の外周壁面または外周面に密着するの
で、スカート部とピストン冠部を結合するボルト
の締付荷重の変化には関係なく、またピストンの
上下慣性力、燃焼ガス圧力の変化、機関の慣性
力、熱膨張などの影響が少なく、長期に亘り密封
効果を損わない。 Because the band ring elastically adheres to the outer peripheral wall surface or outer peripheral surface of the annular groove due to its own expanding or contracting force, it is independent of changes in the tightening load of the bolt that connects the skirt part and the piston crown part. In addition, the effect of vertical inertia of the piston, changes in combustion gas pressure, inertia of the engine, thermal expansion, etc. is small, and the sealing effect is maintained over a long period of time.
スカート部とピストン冠部の重合せ面の周縁側
に隙間を設けたことと、帯環により囲まれる断熱
空部を重合せ面の中央側に設けたことにより、ピ
ストン冠部からスカート部への伝熱が抑えられる
ので、スカート部の熱負荷が軽くなり、ピストン
リングの焼付きなどを防止できる。 By providing a gap on the periphery of the overlapping surface of the skirt and piston crown, and by providing a heat-insulating cavity surrounded by a band ring in the center of the overlapping surface, the flow from the piston crown to the skirt is improved. Since heat transfer is suppressed, the heat load on the skirt section is reduced, and piston ring seizure can be prevented.
第１図は本考案の第１実施例に係る断熱ピスト
ンの正面断面図、第２図は同断熱ピストンにおけ
る帯環の要部を示す平面断面図、第３図は本考案
の第２実施例に係る断熱ピストンの正面断面図、
第４図は同断熱ピストンにおける帯環の平面図、
第５図は本考案の第３実施例に係る断熱ピストン
の正面断面図、第６図は本考案の第４実施例に係
る断熱ピストンの正面断面図、第７図は本考案の
第５実施例に係る断熱ピストンの正面断面図、第
８図は本考案が適用される断熱内燃機関の正面断
面図である。
６……スカート部、１２……断熱空部、１９…
…ピストン、２１，２２……環状溝、２３，２６
……帯環、３１……結合ボルト。
Fig. 1 is a front sectional view of a heat insulating piston according to a first embodiment of the present invention, Fig. 2 is a plane sectional view showing the main part of a band ring in the heat insulating piston, and Fig. 3 is a second embodiment of the present invention. A front sectional view of the heat insulating piston according to
Figure 4 is a plan view of the band ring in the same adiabatic piston.
FIG. 5 is a front cross-sectional view of a heat-insulating piston according to a third embodiment of the present invention, FIG. 6 is a front cross-sectional view of a heat-insulating piston according to a fourth embodiment of the present invention, and FIG. 7 is a front cross-sectional view of a heat-insulating piston according to a fourth embodiment of the present invention. FIG. 8 is a front sectional view of an example adiabatic piston, and FIG. 8 is a front sectional view of an adiabatic internal combustion engine to which the present invention is applied. 6...Skirt portion, 12...Insulating cavity, 19...
... Piston, 21, 22 ... Annular groove, 23, 26
...Band ring, 31...Connecting bolt.
Claims (1)
ン冠部との重合せ面の周縁側の両面にそれぞれ環
状溝を設け、前記重合せ面の中央側に断熱空部を
設け、前記環状溝に厚肉の板ばねを筒状に巻き重
ねてなる帯環を、板面が環状溝の周壁面に弾性的
に接するよう係合したことを特徴とする、断熱ピ
ストン。 An annular groove is provided on both sides of the peripheral edge of the overlapping surface of the metal skirt portion and the ceramic piston crown, a heat insulating cavity is provided in the center of the overlapping surface, and a thick-walled groove is provided in the annular groove. A heat insulating piston characterized in that a band ring formed by winding leaf springs in a cylindrical shape is engaged such that the plate surface is in elastic contact with the peripheral wall surface of an annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984175680U JPH0435562Y2 (en) | 1984-11-21 | 1984-11-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984175680U JPH0435562Y2 (en) | 1984-11-21 | 1984-11-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6192745U JPS6192745U (en) | 1986-06-16 |
| JPH0435562Y2 true JPH0435562Y2 (en) | 1992-08-24 |
Family
ID=30733282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984175680U Expired JPH0435562Y2 (en) | 1984-11-21 | 1984-11-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0435562Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5831463A (en) * | 1981-08-19 | 1983-02-24 | Nec Corp | Magnetic disk controller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54161411U (en) * | 1978-04-28 | 1979-11-12 |
-
1984
- 1984-11-21 JP JP1984175680U patent/JPH0435562Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5831463A (en) * | 1981-08-19 | 1983-02-24 | Nec Corp | Magnetic disk controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6192745U (en) | 1986-06-16 |
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