JPS5853694A - Vacuum vane pump - Google Patents
Vacuum vane pumpInfo
- Publication number
- JPS5853694A JPS5853694A JP15472082A JP15472082A JPS5853694A JP S5853694 A JPS5853694 A JP S5853694A JP 15472082 A JP15472082 A JP 15472082A JP 15472082 A JP15472082 A JP 15472082A JP S5853694 A JPS5853694 A JP S5853694A
- Authority
- JP
- Japan
- Prior art keywords
- vane pump
- vacuum
- vacuum vane
- oil
- pump
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0007—Injection of a fluid in the working chamber for sealing, cooling and lubricating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
- F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2220/00—Application
- F04C2220/10—Vacuum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary Pumps (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、一端部を油タンク忙接続されている吸い込み
導管を介して吸い込まれる油がンール兼潤滑剤としてポ
ンプを通って流れる形式の真空ペーンポンノ、殊に内燃
機関を備えた自動車のための真空ベーンポンプで、吸い
込み導庁の一端が内燃機関のオイルパンに接続されてい
るものに関する。このような真空ポンプは公知である（
ドイツ連邦共和国特許出願公開第２６５３６７５号明細
書）。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum pump pump, in particular an internal combustion engine, in which the oil sucked in via a suction conduit, which is connected at one end to an oil tank, flows through the pump as a pump and as a lubricant. This invention relates to a vacuum vane pump for a motor vehicle equipped with a suction conduit, one end of which is connected to an oil pan of an internal combustion engine. Such vacuum pumps are known (
German Patent Application No. 2653675).
このような真空ポンプは、ディーゼル機関を有する自動
車において例えばサーボブレーキのために負圧が使用さ
れる場合に必要である。ディーゼル機関においては吸気
管内に負圧が存在しないので、必要な負圧は別個のポン
プによって生ぜしめなければならない。Such a vacuum pump is necessary in motor vehicles with diesel engines, for example if negative pressure is used for servo brakes. Since in diesel engines there is no vacuum in the intake pipe, the necessary vacuum must be generated by a separate pump.
前記のような目的に使用されるポンプはベーンポンプと
して構成するのが特に有利である。It is particularly advantageous for the pump used for this purpose to be constructed as a vane pump.
ベーンポンプにおいて漏えい量及び摩擦負荷をわずかに
するために、空気に油を混合して、この油がシール兼潤
滑剤として作用するようにすることは公知である（ドイ
ツ連邦共和国特許第６７９９９８号明細書）。In order to reduce leakage and frictional loads in vane pumps, it is known to mix air with oil so that the oil acts as a seal and as a lubricant (German Patent No. 679,998). ).
公知の構造の真空ベーンポンプにおいては。In a vacuum vane pump of known structure.
内燃機関の潤滑油回路が直接圧ポンプ作業室に接続され
ており、接続導管にき裂が生−じると。If the lubricating oil circuit of the internal combustion engine is directly connected to the pressure pump working chamber and a crack occurs in the connecting line.
内燃機関への潤滑油の供給が中断されて、内燃機関の重
大な損傷又は破損が生じる。The supply of lubricating oil to the internal combustion engine is interrupted, resulting in serious damage or destruction of the internal combustion engine.
これに対し特許請求の範囲第１項の構成要件を具備した
本発明による真空ベーンポンプにおいては、内燃機関と
真空ベーンポンプとの間の導管にき裂が生じても、内燃
機関への潤滑油の供給が中断されることはなく、内燃機
関は常に保護されている。On the other hand, in the vacuum vane pump according to the present invention having the constituent features set forth in claim 1, even if a crack occurs in the conduit between the internal combustion engine and the vacuum vane pump, lubricating oil can be supplied to the internal combustion engine. is not interrupted and the internal combustion engine is always protected.
更に、ロータの側面はよく潤滑され、摩擦熱が油を介し
て均一に排出される。また、潤滑油はポンプの始動と同
時にポンプ作業室内に供給される。Furthermore, the sides of the rotor are well lubricated and the frictional heat is evenly dissipated through the oil. Furthermore, lubricating oil is supplied into the pump working chamber at the same time as the pump is started.
以下においては図面に示した実施例に基づいて本発明の
構成を具体的に説明する。In the following, the configuration of the present invention will be specifically explained based on the embodiments shown in the drawings.
真空ベーンポンプのクー７ング１の孔２内で。In the hole 2 of the cooling 7 ring 1 of the vacuum vane pump.
偏心的に支承されているロータ３が回転する。The eccentrically supported rotor 3 rotates.
ロータ３内には４つのべ一７４が挿入されており、これ
らのベーンの外縁は孔２の壁面に沿っ−ｃ’滑動ｔル。Four vanes 74 are inserted into the rotor 3, and the outer edges of these vanes slide along the wall surface of the hole 2.
更にロータは重量軽減のために４つの孔９を有している
。孔２は、その円周の一部にわたって２つの切り欠き５
及び６を有している。一方の切り欠き５は大きく、逆面
め弁７′を備えた入口ポート１に接続されており、他方
の切り欠き６は小さくて、出口ポート８に接続されてい
る。Furthermore, the rotor has four holes 9 to reduce weight. The hole 2 has two notches 5 over a part of its circumference.
and 6. One notch 5 is large and connected to the inlet port 1 with an inverted valve 7', the other notch 6 is small and connected to the outlet port 8.
第２図から分かるように、ロータ３は２つの平面１０及
び１１を有していて、これらの平面によりわずかな側方
遊びをもってケーシング１内で回転する。これら両方の
平面１０及び１１はそれぞれ１つの切シ欠き１２若しく
は１３を有しておシ、これらの切シ欠きによりそれぞれ
中空室１４及び１５が形成されている。ポンプが回転し
ていると、これらの切り欠き内には。As can be seen in FIG. 2, the rotor 3 has two planes 10 and 11 by means of which it rotates within the casing 1 with a slight lateral play. The two planes 10 and 11 each have a recess 12 or 13, by means of which a cavity 14 and 15 is formed, respectively. Inside these notches when the pump is rotating.
真空ベーンポンプが生ぜしめる負圧のほぼ半分の負圧が
支配している。Negative pressure, which is approximately half of the negative pressure generated by a vacuum vane pump, dominates.
中空室１４の範囲においてケーシング１は孔１６を有し
ており、この孔１６に油の吸い込み導管１７が接続され
る。第３図から分かるように、吸い込み導管１７の一端
部は内燃機廚１９のオイルパン２０に接続されている。In the area of the hollow space 14, the housing 1 has a hole 16 into which an oil suction line 17 is connected. As can be seen in FIG. 3, one end of the suction conduit 17 is connected to an oil pan 20 of the internal combustion engine 19.
吸い込みｔ＃１７の他端部はロータ３の内室（孔９・中
空室１４・１５）に軸方向に接続されており。The other end of the suction t#17 is connected to the inner chamber (hole 9, hollow chambers 14, 15) of the rotor 3 in the axial direction.
このロータ内室は、ケーシング側壁に形成されているラ
ジアル溝２５を介して、ベー７４の間のポンプ作業室に
接続−されている（第１図参照）。この場合ラジアル溝
２５の、平面１１の外周から突出している部分がポンプ
作業室内への絞りとして作用する。This rotor interior is connected to the pump working chamber between the bays 74 via a radial groove 25 formed in the side wall of the casing (see FIG. 1). In this case, the portion of the radial groove 25 that protrudes from the outer periphery of the plane 11 acts as a restriction into the pump working chamber.
真空ポンプへの油吸い上げ管２６の吸い上げ端部はオイ
ルパン２０内で、内燃機関への油吸い上げ管２７の吸い
上げ端部よりも高位に配置されている。これによシ、真
空ベーンポンプと内燃機関との間の吐き出し導管２１に
き裂が生じても、内燃機関１９のオイルパン２０が真空
べ一ンポンゾによって空になることはない。The suction end of the oil suction pipe 26 to the vacuum pump is located higher in the oil pan 20 than the suction end of the oil suction pipe 27 to the internal combustion engine. As a result, even if a crack occurs in the discharge conduit 21 between the vacuum vane pump and the internal combustion engine, the oil pan 20 of the internal combustion engine 19 will not be emptied by the vacuum vane pump.
真空べ一／ポンプの出口ポート８は吐き出し導管２１を
経て内燃機関１９のシリンダヘッド２２に通じており、
入口ポート７は導管２３を介して真空タンク２４に接続
されている。真空べ一ンポ／ゾのケーシング１は図示さ
れていない形式でダイナモケーシングに固定されており
。The outlet port 8 of the vacuum chamber/pump communicates via a discharge conduit 21 to the cylinder head 22 of the internal combustion engine 19;
Inlet port 7 is connected via conduit 23 to vacuum tank 24 . The casing 1 of the vacuum bench/tube is fixed to the dynamo casing in a manner not shown.
真空ベーンポンプは内燃機関からダイナモを介して駆動
される。真空ベーンポンプの回転数ばダイナモの回転数
と等しく、シたがって内燃機関の回転数よりも大きい。The vacuum vane pump is driven by an internal combustion engine via a dynamo. The rotational speed of the vacuum vane pump is equal to the rotational speed of the dynamo, which is therefore greater than the rotational speed of the internal combustion engine.
ロータ３が回転すると、ベー７４は半径方向に運動しな
がら孔２の内壁面に沿って滑動する。When the rotor 3 rotates, the bees 74 slide along the inner wall surface of the hole 2 while moving in the radial direction.
これによって孔２とロータ３とベーン４とによって仕切
られているポンプ作業室の大きさが変化する。このよう
にしてポンプ作用が生ぜしめられ、真空タンク２４内に
負圧が貯えられる。This changes the size of the pump working chamber partitioned by the hole 2, rotor 3, and vane 4. In this way, a pumping effect is created and a negative pressure is stored in the vacuum tank 24.
この負圧は、内燃機関メしてディーゼル機関を有してい
る自動車の真空ブレーキのサーポカとして役立つ。逆止
め弁７′によって、油が真空タンク内に達することか避
けられる。This negative pressure serves as a servo for the vacuum brakes of motor vehicles with internal combustion or diesel engines. A non-return valve 7' prevents oil from reaching into the vacuum tank.
ポンプ作業中、中空室１４及び１５内には真空タンク圧
力と大気圧とのほぼ中間の負圧が生ぜしめられる。この
部分負圧によって、ラジアル溝２５により形成されてい
る絞シを経てオイルパン２０から油が吸い上げられる。During pump operation, a negative pressure approximately intermediate between the vacuum tank pressure and atmospheric pressure is created in the cavities 14 and 15. Due to this partial negative pressure, oil is sucked up from the oil pan 20 through the restriction formed by the radial groove 25.
この油は真空ベーンポンプ内でシール作用並びに潤滑作
用を行う。過剰の油は出口ポート８から出て。This oil provides sealing and lubrication within the vacuum vane pump. Excess oil exits through outlet port 8.
吐き出し導管２１を経て内燃機関１９に戻される。It is returned to the internal combustion engine 19 via the discharge conduit 21.
破損する。しかしながら内燃機関には依然として潤滑油
が供給されるので、内燃機関が破損することはない。fall into disrepair. However, since the internal combustion engine is still supplied with lubricating oil, the internal combustion engine will not be damaged.
吸い込み導管１１はロータ内室及びラジアル溝２５を介
して真空ベーンポンプのポンプ作業室に接続されている
ので、ポンプ作業室には負圧発生の開始と同時にシール
兼潤滑油が供給される。更に、ロータ３の側方の平面が
良好に潤滑され、真空ベーンポンゾ内で発生する摩擦熱
が均一に排出される。The suction conduit 11 is connected via the rotor interior and the radial groove 25 to the pump working chamber of the vacuum vane pump, so that the pump working chamber is supplied with sealing and lubricating oil at the same time as the generation of negative pressure begins. Furthermore, the lateral surfaces of the rotor 3 are well lubricated, and the frictional heat generated within the vacuum vane ponzo is uniformly discharged.
ラジアル溝２５′を真空ベーンポンゾ内の別の箇所に、
それも入ロポ°ニド７と上死点ＯＴとの間の箇所に設け
ておくことも可能である。入口ポート７と上死点ＯＴと
の間の範囲では負圧が減小するけれども、この負圧でも
十分な量のシール兼潤滑油を吸い上げることができる。Attach the radial groove 25' to another location within the vacuum vane ponzo.
It is also possible to provide it at a location between the entry point 7 and the top dead center OT. Although the negative pressure decreases in the range between the inlet port 7 and the top dead center OT, a sufficient amount of sealing and lubricating oil can be sucked up even with this negative pressure.
第１図は本発明の１実施例の断面図、第２図は第１図の
■−■線に沿った断面図、第３図は真空ベーンポンプと
内燃機関との接続形式を示した概略図である。
１・・・ケーシング、２・・・孔、３・・・ロータ、４
・・・ペー７，５及び６・・・切り欠き、７・・・入口
ポート。
７′・・・逆止め弁、８・・・出口ポート、９・・・孔
、１０及び１１・・・平面、１２及び１３・・・切り欠
き、１４及び１５・・・中空室、１６・・・孔、１７・
・・吸い込み導管、１９・・・内燃機関、２０・・・オ
イルパン。
２１・・・吐き出し導管、２２・・・シリンダ、２３・
・・導管、２４・・・真空タンク、２５及び２５′・・
・ラジアル溝、２６及び２７・・・油吸い上げ管、ＯＴ
・・・上死点、ＵＴ・・・下死点Fig. 1 is a sectional view of one embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a schematic diagram showing the connection type between the vacuum vane pump and the internal combustion engine. It is. 1... Casing, 2... Hole, 3... Rotor, 4
...Pages 7, 5 and 6...notches, 7...inlet ports. 7'... Check valve, 8... Outlet port, 9... Hole, 10 and 11... Flat surface, 12 and 13... Notch, 14 and 15... Hollow chamber, 16... ...hole, 17.
...Suction conduit, 19...Internal combustion engine, 20...Oil pan. 21...Discharge conduit, 22...Cylinder, 23.
...Conduit, 24...Vacuum tank, 25 and 25'...
・Radial groove, 26 and 27...Oil suction pipe, OT
...Top dead center, UT...Bottom dead center
Claims (1)
介して吸い込まれる油が７−ル兼潤滑剤としてポンプを
通って流れる形式の真空ベーンポンプにおいて、・吸い
込み導管（１７）の他端部が、２つのケーシング側壁の
間に配置されているロータ（３）の内室に軸方向に接続
しており、このロータ内室は、ケーシング側壁に形成さ
れているラジアル溝（２５・２５′）を介して真空ベー
ンポンプの作業室に接続されていることを特徴とする真
空ベーンポンプ ２、 ラジアル溝（２５）が、真空ベーンポンプの下死
点（ＵＴ）と真空ベー７ポンプの入口ポートの、該下死
点側の制御縁との間の箇所からロータ内室に通じている
特許請求の範囲第１項記載の真空ベーンポンプ ロ、 ラジアル溝（２５’）が、真空ベーンポンプの入
口ポート（７）と上死点（ＯＴ）との間４、真空ベーン
ポンプのための油タンクが同時に内燃機関（１９）のオ
イルパ／（２０）であって、真空ベーンポンプへの油吸
い上げ管（２６）の吸い上げ端部が内燃機関への油吸い
上げ管（２７）の吸い上げ端部よりも高位に配置されて
いる特許請求の範囲第１項〜第３項のいずれかに記載の
真空ベーンポンプ[Claims] 1. In a vacuum vane pump of the type in which oil is sucked in through a suction conduit connected at one end to an oil tank and flows through the pump as a lubricant and lubricant, the suction conduit (17 ) is axially connected to the inner chamber of the rotor (3), which is arranged between two casing side walls, and this rotor inner chamber is connected to the radial groove (3) formed in the casing side wall. Vacuum vane pump 2, characterized in that it is connected to the working chamber of the vacuum vane pump via the vacuum vane pump (25, 25'), the radial groove (25) is connected to the bottom dead center (UT) of the vacuum vane pump and the inlet of the vacuum vane pump The vacuum vane pump according to claim 1, wherein the radial groove (25') communicates with the rotor interior from a location between the port and the control edge on the bottom dead center side. (7) and top dead center (OT) 4, the oil tank for the vacuum vane pump is at the same time the oil pump of the internal combustion engine (19)/(20), and the oil suction pipe (26) to the vacuum vane pump is The vacuum vane pump according to any one of claims 1 to 3, wherein the suction end is located higher than the suction end of the oil suction pipe (27) to the internal combustion engine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813135438 DE3135438A1 (en) | 1981-09-08 | 1981-09-08 | Vacuum vane pump |
| DE31354386 | 1981-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5853694A true JPS5853694A (en) | 1983-03-30 |
Family
ID=6141080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15472082A Pending JPS5853694A (en) | 1981-09-08 | 1982-09-07 | Vacuum vane pump |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5853694A (en) |
| DE (1) | DE3135438A1 (en) |
| ES (1) | ES515526A0 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009091973A (en) * | 2007-10-09 | 2009-04-30 | Denso Corp | Vacuum pump |
| US9767946B2 (en) | 2012-08-21 | 2017-09-19 | Jfe Steel Corporation | Non-oriented electrical steel sheet being less in deterioration of iron loss property by punching |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3325261A1 (en) * | 1983-07-13 | 1985-01-24 | Robert Bosch Gmbh, 7000 Stuttgart | Vacuum pump |
| US4983108A (en) * | 1988-09-28 | 1991-01-08 | Mitsubishi Denki Kabushiki Kaisha | Low pressure container type rolling piston compressor with lubrication channel in the end plate |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2337849A (en) * | 1939-03-14 | 1943-12-28 | W M Welch Mfg Company | Vacuum pump |
| DE2857494A1 (en) * | 1978-07-28 | 1980-04-30 | Barmag Barmer Maschf | Rotary positive displacement fluid machines - has lubricating oil and sliding vane vacuum pumps in rotatable hollow shaft and separated by plate |
| DE3005436A1 (en) * | 1980-02-14 | 1981-08-20 | Robert Bosch Gmbh, 7000 Stuttgart | VACUUM PUMP |
-
1981
- 1981-09-08 DE DE19813135438 patent/DE3135438A1/en not_active Ceased
-
1982
- 1982-09-07 ES ES515526A patent/ES515526A0/en active Granted
- 1982-09-07 JP JP15472082A patent/JPS5853694A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009091973A (en) * | 2007-10-09 | 2009-04-30 | Denso Corp | Vacuum pump |
| US9767946B2 (en) | 2012-08-21 | 2017-09-19 | Jfe Steel Corporation | Non-oriented electrical steel sheet being less in deterioration of iron loss property by punching |
Also Published As
| Publication number | Publication date |
|---|---|
| ES8305893A1 (en) | 1983-05-01 |
| ES515526A0 (en) | 1983-05-01 |
| DE3135438A1 (en) | 1983-03-24 |
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