JPS6153565B2 - - Google Patents
Info
- Publication number
- JPS6153565B2 JPS6153565B2 JP60026647A JP2664785A JPS6153565B2 JP S6153565 B2 JPS6153565 B2 JP S6153565B2 JP 60026647 A JP60026647 A JP 60026647A JP 2664785 A JP2664785 A JP 2664785A JP S6153565 B2 JPS6153565 B2 JP S6153565B2
- Authority
- JP
- Japan
- Prior art keywords
- annular
- piston
- brake
- annular piston
- chamber
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
- F16D65/186—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes with full-face force-applying member, e.g. annular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/04—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by moving discs or pads away from one another against radial walls of drums or cylinders
- F16D55/06—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by moving discs or pads away from one another against radial walls of drums or cylinders without self-tightening action
- F16D55/10—Brakes actuated by a fluid-pressure device arranged in or on the brake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
- F16D59/02—Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/12—Fluid pressure for releasing a normally applied brake, the type of actuator being irrelevant or not provided for in groups F16D2121/04 - F16D2121/10
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2123/00—Multiple operation forces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Braking Arrangements (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、環状シリンダと、この環状シリンダ
内で互いに別々に軸線方向に自由に移動可能な２
つの環状ピストンとを備え、一方の環状ピストン
が環状シリンダと共に常用ブレーキ室を形成して
いる、圧力媒体で操作されるデイスクブレーキに
関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an annular cylinder and two cylinders which are freely movable in the axial direction separately from each other within the annular cylinder.
The present invention relates to a disc brake operated by pressure medium, comprising two annular pistons, one of which together with an annular cylinder forms a service brake chamber.
従来の技術
このようなデイスクブレーキは、同一出願人の
特開昭51−113074号公報により公知である。この
デイスクブレーキでは、同じ外径の２つの環状ピ
ストンが環状シリンダ内に軸線方向に前後して設
けられ、これらの環状ピストンの間において環状
シリンダに隔壁が形成されて、この隔壁と両環状
ピストンとの間にそれぞれ別の室を形成し、また
両環状ピストンは環状シリンダの端壁を密に貫通
して軸線方向外方へ突出する制動運動伝達用ピス
トン部分（押圧環）をそれぞれもつているので、
デイスクブレーキの軸線方向全長が大きくなつて
しまう。BACKGROUND OF THE INVENTION Such a disc brake is known from Japanese Patent Application Laid-Open No. 113074/1983, filed by the same applicant. In this disc brake, two annular pistons having the same outer diameter are provided in an annular cylinder one behind the other in the axial direction, and a partition is formed in the annular cylinder between these annular pistons, and the partition wall and both annular pistons are connected to each other. Separate chambers are formed in between, and both annular pistons each have a braking motion transmitting piston portion (pressing ring) that closely penetrates the end wall of the annular cylinder and protrudes outward in the axial direction. ,
The total length of the disc brake in the axial direction becomes large.
発明が解決しようとする問題点
本発明の課題は、軸線方向全長の小さい簡単な
構造のデイスクブレーキを提供することである。Problems to be Solved by the Invention An object of the present invention is to provide a disk brake with a simple structure and a small overall length in the axial direction.
問題点を解決するための手段
この課題を解決するため本発明によれば、一方
の環状ピストンとしての外側環状ピストン内に、
他方の環状ピストンとしての内側環状ピストンが
軸線方向に自由に移動可能に設けられて、外側環
状ピストンと共に第１の室を形成し、この第１の
室内に外側環状ピストンと内側環状ピストンとを
ブレーキ操作方向に互いに押し離すばねが設けら
れ、外側環状ピストンとばねから遠い方にある内
側環状ピストンの側との間に、圧力を供給可能な
第２の室が設けられ、この第２の室へ圧力を加え
るとき、外側環状ピストンと内側環状ピストン
が、ばねの力とは逆向きに荷重をかけられ、内側
環状ピストンの制動運動を伝達するピストン部分
が、第２の室を貫通している。Means for Solving the Problem According to the present invention, in order to solve this problem, in the outer annular piston as one annular piston,
An inner annular piston as the other annular piston is provided so as to be freely movable in the axial direction and forms a first chamber together with the outer annular piston, in which the outer annular piston and the inner annular piston are arranged. A spring is provided which pushes them apart in the direction of actuation, and a second chamber is provided between the outer annular piston and the side of the inner annular piston remote from the spring, into which pressure can be supplied. When applying pressure, the outer annular piston and the inner annular piston are loaded against the force of the spring, and the piston portion transmitting the braking movement of the inner annular piston passes through the second chamber.
発明の効果
こうして本発明によれば、駐車ブレーキ回路に
属する内側環状ピストンと常用ブレーキ回路に属
する外側環状ピストンとを入れ子式に構成するの
で、環状シリンダに隔壁を設ける必要がなくな
り、また制動運動を伝達するピストン部分（押圧
環）も内側環状ピストンだけに設ければよいの
で、デイスクブレーキの軸線方向全長が短縮さ
れ、構造も簡単になる。しかも外側環状ピストン
の端壁を密に軸線方向外方へ貫通するピストン部
分が１つになるので、パツキング等の密封手段も
少なくなるという利点がある。Effects of the Invention Thus, according to the present invention, since the inner annular piston belonging to the parking brake circuit and the outer annular piston belonging to the service brake circuit are constructed in a nested manner, there is no need to provide a partition wall in the annular cylinder, and the braking movement is reduced. Since the transmission piston portion (pressing ring) need only be provided on the inner annular piston, the total axial length of the disc brake can be shortened and the structure can be simplified. Furthermore, since there is only one piston portion that tightly penetrates the end wall of the outer annular piston axially outward, there is an advantage that the number of sealing means such as packing is reduced.
実施例 図面により以下に本発明を詳細に説明する。Example The invention will be explained in detail below with reference to the drawings.
この図面によれば、車両の車軸１は、軸受２上
に車輪ボルト４および車輪ナツト５により車輪が
固定されているボス３を支持する。ボルト６はブ
レーキデイスク７および８をボス３と接続する。
ブレーキの固定部分は、回転するブレーキデイス
ク７および８による制動に際し摩擦係合するブレ
ーキライニング１１および１２をもつブレーキリ
ング９および１０からなる。ブレーキリング９お
よび１０は、回転方向には固定しかつ軸線方向に
は自由に移動できるように、ボルト１３により車
軸フランジ１４に固定されたブレーキ支持体１５
に懸架されている。 According to this drawing, an axle 1 of a vehicle supports a boss 3 on a bearing 2 to which a wheel is fixed by a wheel bolt 4 and a wheel nut 5. Bolts 6 connect brake discs 7 and 8 with boss 3.
The fixed part of the brake consists of brake rings 9 and 10 with brake linings 11 and 12 that engage frictionally during braking by rotating brake discs 7 and 8. The brake rings 9 and 10 are fixed to the axle flange 14 by bolts 13 to a brake support 15 so as to be fixed in the rotational direction and freely movable in the axial direction.
is suspended.
ブレーキの操作部は、ブレーキリング９と１０
との間に支持された環状のブレーキシリンダ１６
と、この環状シリンダ内を軸線方向に移動できる
ように支持されかつパツキングによつて密閉され
た常用ブレーキ環状ピストン１７と、環状ピスト
ン１７の中空空間内を軸線方向に移動できるよう
に支持された蓄勢ばねブレーキピストン１８とか
らなり、ブレーキピストン１８は、固定的に結合
されてブレーキリング１０と作用結合している押
圧環１８ａにより常用ブレーキピストン１７を、
密に貫通している。 The brake operation part is brake rings 9 and 10.
an annular brake cylinder 16 supported between
a service brake annular piston 17 supported so as to be movable in the axial direction within the annular cylinder and sealed by packing; a spring-loaded brake piston 18 which presses the service brake piston 17 by means of a pressure ring 18a which is fixedly connected and operatively connected to the brake ring 10;
It penetrates closely.
環状シリンダ１６と環状ピストン１７との間に
設けられた環状室１９が、その接続口１９ａおよ
び導管２０を介して自動車ブレーキ弁２１とつな
がつている。 An annular chamber 19 located between the annular cylinder 16 and the annular piston 17 communicates via its connection 19 a and a conduit 20 with a motor vehicle brake valve 21 .
蓄勢ばねブレーキの作用のために設けられたば
ね２２が、常用ブレーキピストン１７の中空空間
内で、このピストンの底部と駐車ブレーキピスト
ンまたは蓄勢ばねピストン１８との間の室２２ａ
に設けられている。ピストン１８の押圧環１８ａ
により貫通されるピストン１７の底部とピストン
１８との間には、環状室２３が存在し、その接続
口２３ａは、導管２４および圧力制御弁２５を介
して、手動ブレーキ弁２６と接続されている。 A spring 22 provided for the action of the reserve spring brake is located in the hollow space of the service brake piston 17 in a chamber 22a between the bottom of this piston and the parking brake piston or reserve spring piston 18.
It is set in. Pressing ring 18a of piston 18
An annular chamber 23 is present between the bottom of the piston 17 and the piston 18, which is penetrated by the piston 18, the connecting port 23a of which is connected via a conduit 24 and a pressure control valve 25 to a manual brake valve 26. .
作用は次の通りである。 The action is as follows.
すなわち自動車ブレーキ弁２１を操作すると、
導管２０および接続口１９ａを介して環状室１９
が給気される。ここに形成される圧力は、一方の
側では環状ピストン１７を、環状ピストン１８
と、押圧環１８ａと作用結合しているブレーキリ
ング１０と、ブレーキライニング１２と共に、回
転するブレーキデイスク８に押しつけ、また他の
側では環状シリンダ１６をブレーキリング９およ
びブレーキライニング１１と共に、回転すブレー
キデイスク７に押しつける。 That is, when the automobile brake valve 21 is operated,
Annular chamber 19 via conduit 20 and connection port 19a
is supplied with air. The pressure created here causes the annular piston 17 on the one side and the annular piston 18 on the other side to
and, together with the brake ring 10 and the brake lining 12, which are operatively connected to the pressure ring 18a, press against the rotating brake disc 8, and on the other side press the annular cylinder 16, together with the brake ring 9 and the brake lining 11, against the rotating brake. Press it against disk 7.
駐車ブレーキ装置を操作し、あるいは補助ブレ
ーキ装置を段階的に操作するために、手動ブレー
キ弁２６が適当な位置にもたらされる。 A manual brake valve 26 is brought into position for operating the parking brake system or for stepping the auxiliary brake system.
その際、通常の走行中にも常用ブレーキ装置の
操作時にも室２３内に存在してばね２２の力に抗
して作用する圧力が接続口２３ａを介して除かれ
るので、ばね２２の応力が、一方の側では、環状
ピストン１８を押圧環１８ａ、ブレーキリング１
０およびライニング１２と共にブレーキデイスク
８に押しつけ、また他の側では、環状ピストン１
７が環状シリンダ１６の方へ動き、環状シリンダ
１６はさらにブレーキリング９およびライニング
１１と共にブレーキデイスク７へ運動を続ける。 At this time, the pressure that exists in the chamber 23 and acts against the force of the spring 22 during normal driving and when the service brake system is operated is removed via the connection port 23a, so that the stress of the spring 22 is reduced. , on one side, the annular piston 18 is pressed by the ring 18a, the brake ring 1
0 and lining 12 against the brake disc 8, and on the other side the annular piston 1
7 moves towards the annular cylinder 16, which, together with the brake ring 9 and the lining 11, continues its movement towards the brake disc 7.
図は本発明によるデイスクブレーキの断面図で
ある。
１６……環状シリンダ、１７，１８……環状ピ
ストン、１８ａ……ピストン部分（押圧環）、１
９……常用ブレーキ室（環状室）、２２ａ……第
１の室、２２……ばね、２３……第２の室（環状
室）。
The figure is a sectional view of a disc brake according to the invention. 16... Annular cylinder, 17, 18... Annular piston, 18a... Piston part (pressing ring), 1
9... Service brake chamber (annular chamber), 22a... First chamber, 22... Spring, 23... Second chamber (annular chamber).
Claims (1)
に別々に軸線方向に自由に移動可能な２つの環状
ピストンとを備え、一方の環状ピストンが環状シ
リンダと共に常用ブレーキ室を形成しているもの
において、一方の環状ピストンとしての外側環状
ピストン１７内に、他方の環状ピストンとしての
内側環状ピストン１８が軸線方向に自由に移動可
能に設けられて、外側環状ピストン１７と共に第
１の室２２ａを形成し、この第１の室２２ａ内
に、外側環状ピストン１７と内側環状ピストン１
８とをブレーキ操作方向に互いに押し離すばね２
２が設けられ、外側環状ピストン１７とばね２２
から遠い方にある内側環状ピストン１８の側との
間に、圧力を供給可能な第２の室２３が設けら
れ、この第２の室２３へ圧力を加えるとき、外側
環状ピストン１７と内側環状ピストン１８が、ば
ね２２の力とは逆向きに荷重をかけられ、内側環
状ピストン１８の制動運動を伝達するピストン部
分１８ａが、第２の室２３を貫通していることを
特徴とする、圧力媒体により操作されるデイスク
ブレーキ。1 An annular cylinder comprising an annular cylinder and two annular pistons that are freely movable in the axial direction separately from each other within the annular cylinder, one of the annular pistons forming a service brake chamber together with the annular cylinder; Inside the outer annular piston 17 as an annular piston, an inner annular piston 18 as the other annular piston is provided so as to be freely movable in the axial direction and together with the outer annular piston 17 forms a first chamber 22a. In the chamber 22a of 1, an outer annular piston 17 and an inner annular piston 1 are placed.
8 and the spring 2 that pushes them apart from each other in the direction of brake operation.
2 is provided with an outer annular piston 17 and a spring 22
A second chamber 23 capable of supplying pressure is provided between the side of the inner annular piston 18 that is farthest from the outer annular piston 17 and the inner annular piston 18 . 18 is loaded in a direction opposite to the force of the spring 22 and is characterized in that a piston part 18a passing through the second chamber 23 transmits the braking movement of the inner annular piston 18 Disc brake operated by.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2650490.5 | 1976-11-04 | ||
| DE2650490A DE2650490C2 (en) | 1976-11-04 | 1976-11-04 | Pneumatically or hydraulically controlled disc brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6117729A JPS6117729A (en) | 1986-01-25 |
| JPS6153565B2 true JPS6153565B2 (en) | 1986-11-18 |
Family
ID=5992408
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12415377A Pending JPS5357364A (en) | 1976-11-04 | 1977-10-18 | Disk brake operated by pressure medium for automobile |
| JP60026647A Granted JPS6117729A (en) | 1976-11-04 | 1985-02-15 | Disk brake operated by pressure medium |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12415377A Pending JPS5357364A (en) | 1976-11-04 | 1977-10-18 | Disk brake operated by pressure medium for automobile |
Country Status (10)
| Country | Link |
|---|---|
| JP (2) | JPS5357364A (en) |
| AT (1) | AT373370B (en) |
| DE (1) | DE2650490C2 (en) |
| FR (1) | FR2370194A2 (en) |
| GB (1) | GB1545419A (en) |
| IT (1) | IT1147796B (en) |
| NL (1) | NL7711311A (en) |
| PL (1) | PL117548B3 (en) |
| SE (1) | SE416492B (en) |
| SU (1) | SU683643A3 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62183067U (en) * | 1986-05-14 | 1987-11-20 | ||
| JP2022076984A (en) * | 2020-11-10 | 2022-05-20 | 上銀科技股▲分▼有限公司 | Thrust braking device and turning workbench using it |
| JP2023036219A (en) * | 2021-09-02 | 2023-03-14 | 上銀科技股▲分▼有限公司 | Normally-closed type brake device and rotary workbench using the same |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3274673D1 (en) * | 1981-09-09 | 1987-01-22 | Bendix Ltd | Actuator for brakes or the like |
| DE3224877A1 (en) * | 1982-07-03 | 1984-01-05 | Hermann Dr.-Ing. 3302 Cremlingen Klaue | Hydraulically or pneumatically actuated full-lining disc brake, in particular for motor vehicles |
| DE3732761A1 (en) * | 1986-09-30 | 1988-03-31 | Zahnradfabrik Friedrichshafen | VEHICLE TRANSMISSION WITH INTEGRATED BRAKE |
| DE102007010398A1 (en) * | 2007-03-01 | 2008-09-04 | Ortlinghaus-Werke Gmbh | safety brake |
| CN103994163A (en) * | 2014-05-20 | 2014-08-20 | 山东海工机械有限公司 | Hydraulic anti-lock brake wheel cylinder and braking system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2201734A5 (en) * | 1972-09-29 | 1974-04-26 | Kiaue Hermann | |
| DE2441605C2 (en) * | 1974-08-30 | 1986-03-20 | Hermann Dr.-Ing. 3302 Cremlingen Klaue | Hydraulically or pneumatically operated full-pad disc brakes, in particular for motor vehicles |
| DE2510193A1 (en) * | 1975-03-08 | 1976-09-16 | Wabco Westinghouse Gmbh | PRESSURE-ACTUATED DISC BRAKE, IN PARTICULAR FOR VEHICLES |
-
1976
- 1976-11-04 DE DE2650490A patent/DE2650490C2/en not_active Expired
-
1977
- 1977-09-27 SE SE7710770A patent/SE416492B/en unknown
- 1977-10-04 AT AT0705377A patent/AT373370B/en not_active IP Right Cessation
- 1977-10-07 GB GB41901/77A patent/GB1545419A/en not_active Expired
- 1977-10-14 NL NL7711311A patent/NL7711311A/en not_active Application Discontinuation
- 1977-10-18 JP JP12415377A patent/JPS5357364A/en active Pending
- 1977-10-29 PL PL1977201841A patent/PL117548B3/en unknown
- 1977-11-02 SU SU772538103A patent/SU683643A3/en active
- 1977-11-02 IT IT69454/77A patent/IT1147796B/en active
- 1977-11-04 FR FR7733302A patent/FR2370194A2/en active Granted
-
1985
- 1985-02-15 JP JP60026647A patent/JPS6117729A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62183067U (en) * | 1986-05-14 | 1987-11-20 | ||
| JP2022076984A (en) * | 2020-11-10 | 2022-05-20 | 上銀科技股▲分▼有限公司 | Thrust braking device and turning workbench using it |
| JP2023036219A (en) * | 2021-09-02 | 2023-03-14 | 上銀科技股▲分▼有限公司 | Normally-closed type brake device and rotary workbench using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| PL201841A1 (en) | 1978-05-08 |
| SE7710770L (en) | 1978-05-05 |
| NL7711311A (en) | 1978-05-08 |
| IT1147796B (en) | 1986-11-26 |
| ATA705377A (en) | 1983-05-15 |
| FR2370194A2 (en) | 1978-06-02 |
| FR2370194B2 (en) | 1981-06-12 |
| JPS6117729A (en) | 1986-01-25 |
| AT373370B (en) | 1984-01-10 |
| JPS5357364A (en) | 1978-05-24 |
| GB1545419A (en) | 1979-05-10 |
| SE416492B (en) | 1981-01-05 |
| DE2650490A1 (en) | 1978-05-11 |
| SU683643A3 (en) | 1979-08-30 |
| PL117548B3 (en) | 1981-08-31 |
| DE2650490C2 (en) | 1986-06-05 |
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