JPH0190661U - - Google Patents
Info
- Publication number
- JPH0190661U JPH0190661U JP18667787U JP18667787U JPH0190661U JP H0190661 U JPH0190661 U JP H0190661U JP 18667787 U JP18667787 U JP 18667787U JP 18667787 U JP18667787 U JP 18667787U JP H0190661 U JPH0190661 U JP H0190661U
- Authority
- JP
- Japan
- Prior art keywords
- rear chamber
- chamber
- power cylinder
- negative pressure
- piston
- 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
- 238000007789 sealing Methods 0.000 claims 3
- 238000005192 partition Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Braking Systems And Boosters (AREA)
Description
第１〜３図は本考案に係る負圧ブースタの第１
実施例を示す図であり、第１図はその負圧ブース
タの正面断面図、第２図はそのシール部材の拡大
断面図、第３図はそのシール部材近傍を示す正面
断面図、第４〜６図は本考案に係る負圧ブースタ
の第２実施例を示す図であり、第４，５図はそれ
ぞれそのリツプ部近傍の正面断面図、第６図はそ
のシール部材近傍の正面断面図、第７図は従来の
負圧ブースタを示すその正面断面図である。
１１，３１……パワーシリンダ、１５，３２…
…ピストン、１６……フロント室、１７……リヤ
室、２５，３３……シール部材、２５ａ，３３ｃ
……リツプ部。
Figures 1 to 3 show the first negative pressure booster according to the present invention.
1 is a front sectional view of the negative pressure booster, FIG. 2 is an enlarged sectional view of the seal member, FIG. 3 is a front sectional view showing the vicinity of the seal member, and FIG. 6 is a diagram showing a second embodiment of the negative pressure booster according to the present invention, FIGS. 4 and 5 are front sectional views of the vicinity of the lip portion thereof, FIG. 6 is a front sectional view of the vicinity of the seal member, FIG. 7 is a front sectional view showing a conventional negative pressure booster. 11, 31...Power cylinder, 15, 32...
...Piston, 16...Front chamber, 17...Rear chamber, 25, 33...Seal member, 25a, 33c
...Rip section.
Claims (1)
に移動可能に収納され、パワーシリンダをフロン
ト室およびリヤ室に区画するピストンと、パワー
シリンダおよびピストンの間に介装され、フロン
ト室およびリヤ室の間をシールするシール部材と
、を備えた負圧ブースタにおいて、前記シール部
材はピストン外周側の少なくとも１箇所にリツプ
部を有し、該リツプ部がフロント室の圧力がリヤ
室の圧力より高い場合のみ、フロント室をリヤ室
に連通させるようリヤ室側に撓むことができるよ
うにしたことを特徴とする負圧ブースタ。 a power cylinder; a piston that is housed in the power cylinder so as to be movable in the axial direction and partitions the power cylinder into a front chamber and a rear chamber; A negative pressure booster comprising a sealing member for sealing, the sealing member having a lip portion at at least one location on the outer circumferential side of the piston, and the lip portion is provided only when the pressure in the front chamber is higher than the pressure in the rear chamber. A negative pressure booster characterized by being able to bend toward the rear chamber so that the front chamber communicates with the rear chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18667787U JPH0190661U (en) | 1987-12-07 | 1987-12-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18667787U JPH0190661U (en) | 1987-12-07 | 1987-12-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0190661U true JPH0190661U (en) | 1989-06-14 |
Family
ID=31477890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18667787U Pending JPH0190661U (en) | 1987-12-07 | 1987-12-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0190661U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008230596A (en) * | 2007-03-08 | 2008-10-02 | Robert Bosch Gmbh | Pneumatic brake booster comprising check valve for discharging internal overpressure |
-
1987
- 1987-12-07 JP JP18667787U patent/JPH0190661U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008230596A (en) * | 2007-03-08 | 2008-10-02 | Robert Bosch Gmbh | Pneumatic brake booster comprising check valve for discharging internal overpressure |