JPH02131233U - - Google Patents
Info
- Publication number
- JPH02131233U JPH02131233U JP4071789U JP4071789U JPH02131233U JP H02131233 U JPH02131233 U JP H02131233U JP 4071789 U JP4071789 U JP 4071789U JP 4071789 U JP4071789 U JP 4071789U JP H02131233 U JPH02131233 U JP H02131233U
- Authority
- JP
- Japan
- Prior art keywords
- casing
- pump
- diaphragm
- negative pressure
- pressure 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.)
- Pending
Links
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
Description
第１図はこの考案の一実施例による圧力スイツ
チの縦断側面図、第２図は第１図に示した圧力ス
イツチに備えたリリーフバルブの作動時の状態を
説明する縦断側面図、第３図は従来の圧力スイツ
チの縦断側面図である。
１…圧力スイツチ、２…ケーシング、３…ダイ
ヤフラム、４…出力部材、５…戻しばね、６…ポ
ンプ、７…負圧室、８…スイツチ、８ａ，８ｂ…
ポンプ接点、９…リリーフバルブ。
Fig. 1 is a longitudinal sectional side view of a pressure switch according to an embodiment of the invention, Fig. 2 is a longitudinal sectional side view illustrating the operating state of the relief valve provided in the pressure switch shown in Fig. 1, and Fig. 3. 1 is a vertical side view of a conventional pressure switch. DESCRIPTION OF SYMBOLS 1...Pressure switch, 2...Casing, 3...Diaphragm, 4...Output member, 5...Return spring, 6...Pump, 7...Negative pressure chamber, 8...Switch, 8a, 8b...
Pump contact, 9...Relief valve.
Claims (1)
ラムに取付けられているとともにケーシングとの
あいだに設けた戻しばねが当接する出力部材と、
前記戻しばねとポンプの発生する負圧との均衡に
より容積が変化する負圧室と、前記出力部材によ
りポンプ接点が接離してポンプを作動・不作動と
するスイツチとをケーシング内に備えた圧力スイ
ツチにおいて、 前記ケーシングには、負圧室内の圧力を所定の
大きさよりも減少させないリリーフバルブを一体
にそなえたことを特徴とする圧力スイツチ。[Claims for Utility Model Registration] A flexible diaphragm, an output member attached to the diaphragm and abutted by a return spring provided between the casing and the diaphragm;
A pressure chamber provided in a casing with a negative pressure chamber whose volume changes depending on the balance between the return spring and the negative pressure generated by the pump, and a switch that activates or deactivates the pump by bringing the pump contacts into and out of contact with the output member. A pressure switch, characterized in that the casing is integrally provided with a relief valve that does not reduce the pressure in the negative pressure chamber below a predetermined level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4071789U JPH02131233U (en) | 1989-04-06 | 1989-04-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4071789U JPH02131233U (en) | 1989-04-06 | 1989-04-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02131233U true JPH02131233U (en) | 1990-10-31 |
Family
ID=31550746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4071789U Pending JPH02131233U (en) | 1989-04-06 | 1989-04-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02131233U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002195162A (en) * | 2000-12-27 | 2002-07-10 | Yamaha Livingtec Corp | Jet bath safety device |
| EP1495724A1 (en) | 2003-07-10 | 2005-01-12 | Showa IKA Kohgyo Co., Ltd. | Surgical retractors |
-
1989
- 1989-04-06 JP JP4071789U patent/JPH02131233U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002195162A (en) * | 2000-12-27 | 2002-07-10 | Yamaha Livingtec Corp | Jet bath safety device |
| EP1495724A1 (en) | 2003-07-10 | 2005-01-12 | Showa IKA Kohgyo Co., Ltd. | Surgical retractors |