JP2849858B2 - Pneumatic booster - Google Patents
Pneumatic boosterInfo
- Publication number
- JP2849858B2 JP2849858B2 JP2128579A JP12857990A JP2849858B2 JP 2849858 B2 JP2849858 B2 JP 2849858B2 JP 2128579 A JP2128579 A JP 2128579A JP 12857990 A JP12857990 A JP 12857990A JP 2849858 B2 JP2849858 B2 JP 2849858B2
- Authority
- JP
- Japan
- Prior art keywords
- retainer
- valve body
- inner peripheral
- cylindrical portion
- pneumatic booster
- 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
Landscapes
- Braking Systems And Boosters (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、車両のブレーキ系統等に用いられる気圧式
倍力装置に関する。Description: TECHNICAL FIELD The present invention relates to a pneumatic booster used for a brake system or the like of a vehicle.
（従来の技術） 近年、多くの自動車に、エンジンの吸込み負圧と大気
圧との圧力差を利用してマスタシリンダで発生するブレ
ーキ液圧を増加させ、小さなペダル踏力で大きな制動力
が得られるようにした気圧式倍力装置が取付けられてい
る。(Related Art) In recent years, in many automobiles, a brake fluid pressure generated in a master cylinder is increased by utilizing a pressure difference between a suction negative pressure of an engine and an atmospheric pressure, and a large braking force can be obtained with a small pedal effort. The pneumatic booster as described above is attached.
この気圧式倍力装置において全長を短くして小型化を
図ったものが本出願人により、実開昭61−172857号公報
で提案されている。The pneumatic booster in which the overall length is shortened to reduce the size has been proposed by the present applicant in Japanese Utility Model Laid-Open No. 61-172857.
これには、バルブボディの筒状部に、この筒状部の開
口端部に当接する外フランジと筒状部の内周部に係合す
る複数個の爪とを有する略リング状のリテーナを装着
し、筒状部を覆うブーツをその一端を前記リテーナを介
して前記筒状部に保持させ他端を前記シェルに保持させ
て設けたものが開示されている。そして、外フランジ筒
状部の開口端部に当接することによりリテーナの嵌入位
置を規制し、また爪が筒状部の内周部に係合することに
よりリテーナをバルブボディに固定するようにしてい
る。To this end, a substantially ring-shaped retainer having an outer flange abutting on an opening end of the cylindrical portion and a plurality of claws engaging with an inner peripheral portion of the cylindrical portion is provided on the cylindrical portion of the valve body. There is disclosed a boot which is mounted and covers the cylindrical portion, with one end thereof being held by the cylindrical portion via the retainer and the other end being held by the shell. Then, the fitting position of the retainer is regulated by abutting on the opening end of the outer flange cylindrical portion, and the retainer is fixed to the valve body by engaging the claw with the inner peripheral portion of the cylindrical portion. I have.
（発明が解決しようとする課題） ところで、上述した気圧式倍力装置では、リテーナを
バルブボディに嵌入するときにリテーナがバルブボディ
に対して傾いたりあるいは軸心がずれたりした状態で挿
入され易くこれにより一部の爪が筒状部の開口端部また
は内周に当って曲ってしまい、この曲がった状態でバル
ブボディに装着されると確実にリテーナが固定されず、
使用中に外れてしまう虞がある。そこで、この装着不良
を避けるためにリテーナ装着後その都度チェック・整備
を強いられているというのが実状であった。(Problems to be Solved by the Invention) In the pneumatic booster described above, when the retainer is inserted into the valve body, it is easy to insert the retainer in a state where the retainer is inclined with respect to the valve body or the axis thereof is shifted. As a result, some of the claws hit the opening end or the inner periphery of the cylindrical portion and bend, and when mounted on the valve body in this bent state, the retainer is not securely fixed,
There is a possibility that it will come off during use. Therefore, in order to avoid this mounting failure, it has been the case that the check and maintenance are forced each time the retainer is mounted.
本発明は、上記問題点を解決するためになされたもの
で、バルブボディに嵌入するだけで確実に固定されるリ
テーナを有する気圧式倍力装置を提供することを目的と
する。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a pneumatic booster having a retainer that is securely fixed only by being fitted into a valve body.
（課題を解決するための手段） 上記目的を達成するために、シェル本体から後方に突
出したバルブボディの筒状部に略筒状のリテーナを装着
し、一端を前記リテーナを介して前記筒状部に保持させ
他端を前記シェル本体に保持させて前記筒状部を覆うブ
ーツを設けた気圧式倍力装置において、 リテーナが、筒状部の内周部に嵌入されて係合する爪
と、この爪の嵌入方向前側に位置して前記内周部に摺動
可能なガイド部と、を有することを特徴とする。(Means for Solving the Problems) In order to achieve the above object, a substantially cylindrical retainer is mounted on a cylindrical portion of a valve body protruding rearward from a shell body, and one end of the cylindrical retainer is inserted through the retainer. A pneumatic booster provided with a boot that covers the cylindrical portion while holding the other end to the shell body and holding the other end to the shell main body, wherein the retainer has a claw fitted and engaged with the inner peripheral portion of the cylindrical portion. A guide portion which is located on the front side in the fitting direction of the claw and is slidable on the inner peripheral portion.
（作 用） 上記構成によれば、リテーナをバルブボディの筒状部
の内周部に押圧すれば、爪に先立ってガイド部が筒状部
の内周部に摺動され、リテーナの傾きあるいは軸心のず
れを防止して一部の爪が筒状部の開口端部または内周に
当って曲がることなく、リテーナを正常な状態でバルブ
ボディに装着できる。(Operation) According to the above configuration, when the retainer is pressed against the inner peripheral portion of the tubular portion of the valve body, the guide portion slides on the inner peripheral portion of the tubular portion prior to the claw, and the inclination of the retainer or The retainer can be mounted to the valve body in a normal state without preventing the displacement of the axial center and causing some of the claws to bend against the open end or the inner periphery of the tubular portion.
（実施例） 以下、本発明の一実施例の気圧式倍力装置を第１図な
いし第４図に基づいて説明する。Embodiment A pneumatic booster according to an embodiment of the present invention will be described below with reference to FIGS.
シェル本体１の内部にダイアフラム２を備えたパワー
ピストン３及びこのパワーピストン３に係合されて一体
的に移動する合成樹脂製のバルブボディ４を設けてい
る。バルブボディ４の後方の筒状部５はシェル本体１の
後方に開口して形成されたバルブボディ案内部６に摺接
させかつこのバルブボディ案内部６から後方突出させて
いる。バルブボディ４の内部にこのバルブボディ４と相
対的に変位可能に入力軸７を挿入すると共に入力軸７と
バルブボディ４の相対的な変位等によって開閉する弁機
構８を設けている。A power piston 3 provided with a diaphragm 2 and a valve body 4 made of synthetic resin engaged with the power piston 3 and integrally moved are provided inside a shell main body 1. The rear cylindrical portion 5 of the valve body 4 is slidably contacted with and protrudes rearward from the valve body guide portion 6 formed to open behind the shell body 1. An input shaft 7 is inserted into the valve body 4 so as to be displaceable relative to the valve body 4, and a valve mechanism 8 that opens and closes by the relative displacement of the input shaft 7 and the valve body 4 is provided.
そして、入力軸７に押圧力が加わると弁機構８が作動
してパワーピストン３によって画成されている定圧室９
及び変圧室10間に圧力差が生じ、この圧力差によってバ
ルブボディ４がその筒状部５がバルブボディ案内部６に
案内されて変位しこれによりダイアフラム２ひいてはパ
ワーピストン３に取付けられている出力軸11を大きな力
で前進させる。When a pressing force is applied to the input shaft 7, the valve mechanism 8 operates and the constant pressure chamber 9 defined by the power piston 3.
A pressure difference is generated between the pressure chamber 10 and the pressure change chamber 10, and the pressure difference causes the valve body 4 to be displaced by its cylindrical portion 5 being guided by the valve body guide portion 6, whereby the output mounted on the diaphragm 2 and thus the power piston 3 is output. The shaft 11 is advanced with a large force.
次に、本発明の要部であるリテーナについて説明す
る。Next, a retainer which is a main part of the present invention will be described.
この気圧式倍力装置には、バルブボティ案内部６が摺
接する筒状部５の外周に塵埃等が付着するのを防止して
バルブボディ４がバルブボディ案内部６に案内されてス
ムーズに進退動されるようにするためのブーツ12が一端
をバルブボディ案内部６にまた他端を筒状部５に位置さ
せて設けられており、筒状部５の内周にはブーツ12を筒
状部５に固定するためのリテーナ13が取付けられてい
る。In this pneumatic booster, the valve body 4 is guided by the valve body guide portion 6 to prevent dust and the like from adhering to the outer periphery of the cylindrical portion 5 with which the valve body guide portion 6 slides, so that the valve body smoothly moves forward and backward. A boot 12 is provided so that one end is located at the valve body guide portion 6 and the other end is located at the tubular portion 5, and the boot 12 is provided on the inner periphery of the tubular portion 5. A retainer 13 for fixing the retainer 5 is mounted.
リテーナ13は、略筒形状のリテーナ本体部14と、この
リテーナ本体部14の開口側に設けられ径方向外方に延び
てリテーナ13の装着時に筒状部５の開口端面15に当接し
得る外フランジ16とから構成されている。The retainer 13 has a substantially cylindrical retainer body 14, and is provided on the opening side of the retainer body 14 and extends radially outward so as to be able to come into contact with the opening end face 15 of the tubular part 5 when the retainer 13 is mounted. And a flange 16.
リテーナ本体部14には周方向に一定間隔で径方向外方
に向けて打ち抜いて筒状部５の内周部17に係合可能な爪
18が設けられている。この爪18は、板状で後側に一定の
角度で傾いて形成されており、その端面の外側の角19が
バルブボディ４の内周面に食込むようにその角19がバル
ブボディ４の内径よりも微小寸法大きな径で設定されて
いる。The retainer body 14 has a claw that can be punched radially outward at regular intervals in the circumferential direction to engage with the inner peripheral portion 17 of the cylindrical portion 5.
18 are provided. The claw 18 is formed in a plate shape and is inclined rearward at a certain angle, and the corner 19 of the valve body 4 is formed so that the outer corner 19 of the end face is cut into the inner peripheral surface of the valve body 4. The diameter is set to a diameter slightly larger than the inner diameter.
また、リテーナ本体部14には、爪18の前側（第２図左
方向）に位置させて周方向に一定間隔で径方向外方に向
けて打ち抜かれてガイド部20が内周部17に摺動可能に設
けられている。ガイド部20は前方は湾曲した形状に形成
されており、その外側に外形寸法はバルブボディ４の内
径と同一としてもよく、本実施例では内径のバラツキを
考慮して内径の最大公差で設定されている。また、ガイ
ド部20は湾曲した形状であるので弾性変形可能であり、
リテーナ13を筒状部５の内周部17に向けて押圧したとき
ガイド部20は軸方向及び径方向に変形させられるが、そ
のようなときであってもガイド部20と内周部17との摺接
部が爪18と内周部17との摺接部より前側に位置するよう
にガイド部20と爪18の寸法及び剛性を設定している。The retainer main body 14 is positioned at the front side (left side in FIG. 2) of the claw 18 and is punched radially outward at regular intervals in the circumferential direction so that the guide portion 20 slides on the inner peripheral portion 17. It is movably provided. The guide portion 20 is formed in a curved shape at the front, and the outer dimensions on the outer side thereof may be the same as the inner diameter of the valve body 4. In the present embodiment, the inner diameter is set to the maximum tolerance of the inner diameter in consideration of the variation of the inner diameter. ing. Further, since the guide portion 20 has a curved shape, it can be elastically deformed,
When the retainer 13 is pressed toward the inner peripheral portion 17 of the cylindrical portion 5, the guide portion 20 is deformed in the axial direction and the radial direction, but even in such a case, the guide portion 20 and the inner peripheral portion 17 The dimensions and rigidity of the guide portion 20 and the claw 18 are set so that the sliding contact portion of the guide portion 20 is located on the front side of the sliding contact portion between the claw 18 and the inner peripheral portion 17.
このように構成された気圧式倍力装置では、リテーナ
13を筒状部５の内周部17に向けて押圧すれば、ガイド部
20が筒状部５の内周部17に沿って摺動して案内され、こ
れによりリテーナ13が傾斜したりあるいは軸心がずれた
りすることなく前進し、所定量の前進により爪18が撓ん
で筒状部５の内周部17に挿入すると共に、外フランジ16
が筒状部５の開口端面15に当接してこの外フランジ16の
当接によりリテーナ13は適正な位置に位置決めされる。
そして、リテーナ13に引き抜き方向（第１図右方向）の
力が加わると爪18の角19が内周部に食込んでバルブボデ
ィ４に確実に固定される。このようにガイド部20が爪18
に先立ってリテーナ13を案内するので、従来のもののよ
うに一部の爪18が筒状部５の開口端面15に当接して折曲
げられてしまうことがなくなりリテーナ13をバルブボデ
ィ４に正常な状態で装着でき、そのため、装着後にチェ
ック・整備を行なう必要がなくなる。In the pneumatic booster configured as described above, the retainer
13 is pressed toward the inner peripheral portion 17 of the cylindrical portion 5, the guide portion
The guide 20 slides and is guided along the inner peripheral portion 17 of the cylindrical portion 5, whereby the retainer 13 moves forward without tilting or shifting of the axial center. And inserted into the inner peripheral portion 17 of the cylindrical portion 5 and the outer flange 16
Abuts against the opening end face 15 of the tubular portion 5 and the abutment of the outer flange 16 positions the retainer 13 at an appropriate position.
When a force is applied to the retainer 13 in the pulling-out direction (right direction in FIG. 1), the corner 19 of the claw 18 bites into the inner peripheral portion and is securely fixed to the valve body 4. In this manner, the guide portion 20 is
The retainer 13 is guided in advance, so that some of the claws 18 do not come into contact with the opening end surface 15 of the tubular portion 5 and are bent as in the conventional case, and the retainer 13 is attached to the valve body 4 normally. It can be mounted in a state, so that it is not necessary to perform check and maintenance after mounting.
第５図及び第６図は、本発明の他の実施例を示す。こ
のものは上記実施例に示すものと比べ、バルブボディ４
は筒状部５の内周部17の端部に奥行寸法e1の大径部31を
形成し、この筒状部５の形状に合わせて以下のようにリ
テーナ32を構成したことが主に異なっており、他の部
分、部材は上記実施例に示すものと同一のものが用いら
れ、これらは同一符号で示し（なお、これらの一部は第
１図ないし第４図のものを流用して第５図及び第６図へ
の記載は省略する）、その説明は省略する。5 and 6 show another embodiment of the present invention. This is different from the one shown in the above embodiment in that the valve body 4
The large diameter portion 31 of the depth dimension e 1 is formed on the end portion of the inner peripheral portion 17 of the cylindrical portion 5, it is primarily configured retainer 32 as follows in accordance with the shape of the cylindrical portion 5 The other parts and members are the same as those shown in the above-mentioned embodiment, and they are denoted by the same reference numerals (note that some of these parts are diverted from those shown in FIGS. 1 to 4). 5 and 6 are omitted), and the description thereof is omitted.
すなわち、このリテーナ32は概略大径部33及び高さ寸
法がe2（e2＞e1）の小径部34からなる段付きの略筒形状
を成し、大径部33は筒状部５に形成された段差部35に当
接し得るようになっており、大径部33には周方向に一定
間隔で径方向外方に向けて打ち抜いて爪36が設けられて
いる。この爪36は、板状で後側に一定の角度で傾いて形
成されており、その端面の外側の角37が筒状部５の大径
部31の内周面に食込むようにその角37が筒状部５の大径
部31の内径よりも微小寸法大きな径で設定されている。That is, the retainer 32 has a stepped substantially cylindrical shape including a large-diameter portion 33 and a small-diameter portion 34 having a height dimension of e 2 (e 2 > e 1 ). The large diameter portion 33 is provided with claws 36 which are punched radially outward at regular intervals in the circumferential direction. The claw 36 is formed in a plate shape and is inclined rearward at a predetermined angle, and its outer edge 37 is cut into the inner peripheral surface of the large-diameter portion 31 of the cylindrical portion 5 so as to cut into the inner surface. 37 is set to a diameter slightly larger than the inner diameter of the large diameter portion 31 of the cylindrical portion 5.
また、リテーナ32の小径部34には、周方向に一定間隔
で径方向外方に向けて打ち抜いてガイド部38が筒状部５
の内周部17に摺動可能に設けられている。ガイド部38は
径方向へ湾曲した形状に形成されており、その外側の外
径寸法は筒状部５の内周部17の内径31と同一にするのが
よいが、内周部17の内径のバラツキを考慮して内径の最
大公差で設定されている。また、ガイド部38は湾曲した
形状であるので弾性変形可能であり、リテーナ32を筒状
部５の内周部17に向けて押圧したときガイド部38は軸方
向及び径方向に変形させられ、リテーナ32を筒状部５の
内周部17に向けて押込むときガイド部38が段差部35に当
接して軸方向の寸法が縮むように変形させられるが、そ
のようなときであっても爪31が内周部17にまだ係合しな
いようにガイド部38と爪31の寸法及び剛性を設定してあ
る。The small-diameter portion 34 of the retainer 32 is punched radially outward at regular intervals in the circumferential direction to form a guide portion 38 on the cylindrical portion 5.
Is slidably provided on the inner peripheral portion 17 of the main body. The guide part 38 is formed in a shape curved in the radial direction, and the outer diameter of the outer part is preferably the same as the inner diameter 31 of the inner peripheral part 17 of the cylindrical part 5. The maximum tolerance of the inner diameter is set in consideration of the variation of the inner diameter. Further, since the guide portion 38 has a curved shape, it can be elastically deformed, and when the retainer 32 is pressed toward the inner peripheral portion 17 of the tubular portion 5, the guide portion 38 is deformed in the axial direction and the radial direction, When the retainer 32 is pushed toward the inner peripheral portion 17 of the tubular portion 5, the guide portion 38 is brought into contact with the step portion 35 to be deformed so that the axial dimension is reduced. The dimensions and rigidity of the guide portion 38 and the claw 31 are set so that the 31 does not yet engage with the inner peripheral portion 17.
このものでは。リテーナ32を筒状部５の内周部17に向
けて押圧すれば、ガイド部38が筒状部５の内周部17に沿
って摺動して案内され、これによりリテーナ32が傾斜し
たりあるいは軸心がずれたりすることなく前進し、所定
量の前進により爪36が撓んで筒状部５の大径部31に挿入
すると共に、リテーナ32の大径部35が筒状部５の段差部
35に当接してこの大径部35の当接によりリテーナ32は適
正な位置に位置決めされる。そして、リテーナ32に引き
抜き方向（第６図右方向）の力が加わると爪36の角37が
大径部31に食込んでバルブボディ４に確実に固定され
る。このようにガイド部38が爪36に先立ってリテーナ32
を案内するので、従来のもののように一部の爪が折曲げ
られてしまうことがなくなりリテーナ32をバルブボディ
４に正常な状態で装着でき、そのため、装着後にチェッ
ク・整備を行なう必要がなくなる。In this one. When the retainer 32 is pressed toward the inner peripheral portion 17 of the cylindrical portion 5, the guide portion 38 is slidably guided along the inner peripheral portion 17 of the cylindrical portion 5, whereby the retainer 32 is inclined. Alternatively, the claw 36 is bent and inserted into the large-diameter portion 31 of the cylindrical portion 5 by a predetermined amount of advance, and the large-diameter portion 35 of the retainer 32 is connected to the stepped portion of the cylindrical portion 5. Department
The retainer 32 is positioned at an appropriate position by abutting the large diameter portion 35 against the 35. When a force is applied to the retainer 32 in the pulling-out direction (rightward in FIG. 6), the corner 37 of the claw 36 bites into the large-diameter portion 31 and is securely fixed to the valve body 4. In this manner, the guide portion 38 is provided with the retainer 32 prior to the claw 36.
Is guided, so that some of the claws are not bent as in the prior art, and the retainer 32 can be mounted on the valve body 4 in a normal state, so that it is not necessary to perform check and maintenance after mounting.
（発明の効果） 以上説明したように、リテーナをバルブボディの筒状
部の内周部に押圧すれば、爪の係合に先立ってガイド部
が筒状部の内周部に摺動してリテーナを傾けたりあるい
は軸心をずれさせたりせずにリテーナをバルブボディに
装着できるので、一部の爪の折れ曲がりを防止でき、バ
ルブボディへの装着後のチェック及び不良装着時におけ
る整備を行なう必要がなくなる。そのため、検査工程が
削減でき、生産性の向上及び製造コストの低減が図れ
る。(Effect of the Invention) As described above, when the retainer is pressed against the inner peripheral portion of the tubular portion of the valve body, the guide portion slides on the inner peripheral portion of the tubular portion prior to engagement of the pawl. Since the retainer can be attached to the valve body without tilting or displacing the axis, it is possible to prevent some of the claws from bending, and it is necessary to check after installation on the valve body and perform maintenance when mounting incorrectly Disappears. Therefore, the number of inspection steps can be reduced, and productivity can be improved and manufacturing cost can be reduced.
第１図ないし第４図は本発明の一実施例の気圧式倍力装
置を示し、第１図は断面図、第２図は同気圧式倍力装置
に用いられるリテーナを示す第３図のII−II線に沿った
断面図、第３図は同リテーナを示す正面図、第４図は同
リテーナのガイド部を示す断面図、 第５図及び第６図は本発明の他の実施例を示し、第５図
は同実施例に用いられるリテーナを示す断面図、第６図
は同リテーナをバルブボディに装着した状態を示す断面
図である。 ２……シェル本体、４……バルブボディ、５……筒状
部、12……ブーツ、13……リテーナ、18……爪、20……
ガイド部。1 to 4 show a pneumatic booster according to an embodiment of the present invention. FIG. 1 is a sectional view, and FIG. 2 is a retainer used in the pneumatic booster in FIG. 3 is a front view showing the retainer, FIG. 4 is a sectional view showing a guide portion of the retainer, and FIGS. 5 and 6 are other embodiments of the present invention. 5 is a sectional view showing a retainer used in the embodiment, and FIG. 6 is a sectional view showing a state where the retainer is mounted on a valve body. 2 ... shell body, 4 ... valve body, 5 ... tubular part, 12 ... boots, 13 ... retainer, 18 ... claws, 20 ...
Guide part.
Claims (2)
ィの筒状部に略筒状のリテーナを装着し、一端を前記リ
テーナを介して前記筒状部に保持させ他端を前記シェル
本体に保持させて前記筒状部を覆うブーツを設けた気圧
式倍力装置において、 リテーナが、筒状部の内周部に嵌入されて係合する爪
と、この爪の嵌入方向前側に位置して前記内周部に摺動
可能なガイド部と、を有することを特徴とする気圧式倍
力装置。A substantially cylindrical retainer is mounted on a cylindrical portion of a valve body protruding rearward from a shell body, and one end is held by the cylindrical portion via the retainer, and the other end is held by the shell body. In the pneumatic booster provided with a boot that covers the cylindrical portion, a retainer includes a claw that is fitted into and engaged with an inner peripheral portion of the cylindrical portion, and the retainer is located on a front side in a fitting direction of the claw. A pneumatic booster comprising: a guide portion slidable on an inner peripheral portion.
形成してなる請求項１記載の気圧式倍力装置。2. The pneumatic booster according to claim 1, wherein the guide portion is formed in a curved and elastically deformable shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2128579A JP2849858B2 (en) | 1990-05-18 | 1990-05-18 | Pneumatic booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2128579A JP2849858B2 (en) | 1990-05-18 | 1990-05-18 | Pneumatic booster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0424157A JPH0424157A (en) | 1992-01-28 |
| JP2849858B2 true JP2849858B2 (en) | 1999-01-27 |
Family
ID=14988242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2128579A Expired - Lifetime JP2849858B2 (en) | 1990-05-18 | 1990-05-18 | Pneumatic booster |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2849858B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4341838A1 (en) * | 1993-12-08 | 1995-06-14 | Teves Gmbh Alfred | Vacuum brake booster for motor vehicles |
-
1990
- 1990-05-18 JP JP2128579A patent/JP2849858B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0424157A (en) | 1992-01-28 |
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