JPH0439474U - - Google Patents
Info
- Publication number
- JPH0439474U JPH0439474U JP8067090U JP8067090U JPH0439474U JP H0439474 U JPH0439474 U JP H0439474U JP 8067090 U JP8067090 U JP 8067090U JP 8067090 U JP8067090 U JP 8067090U JP H0439474 U JPH0439474 U JP H0439474U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- port
- valve
- receiving part
- spring
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Safety Valves (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の実施例を示す安全弁の断面図
、第２図は模式図、第３図は油圧モータの油圧回
路図、第４図は従来の安全弁の断面図である。
３２は弁、３５はフリーピストン、３９はバネ
。
FIG. 1 is a sectional view of a safety valve showing an embodiment of the present invention, FIG. 2 is a schematic diagram, FIG. 3 is a hydraulic circuit diagram of a hydraulic motor, and FIG. 4 is a sectional view of a conventional safety valve. 32 is a valve, 35 is a free piston, and 39 is a spring.
Claims (1)
バネ３９で遮断位置に保持し、その弁３２をポー
トＡの圧力及びポートＢの圧力で連通方向に押す
ポートＡ側の受圧部とポートＢ側の受圧部を設け
、かつ両者の受圧面積を同一とし、前記弁３２内
に、ポートＡとポートＢの圧力差によつて摺動し
て低圧側の受圧面積を小さくし、かつバネ４２で
押されて弁３２の連通作動開始圧力を低くするフ
リーピストン３４を設けたことを特徴とする安全
弁。 The valve 32 that communicates and shuts off port A and port B is held in the shutoff position by a spring 39, and the pressure receiving part on the port A side and the port B side push the valve 32 in the communication direction with the pressure of port A and the pressure of port B. A pressure-receiving part is provided, and the pressure-receiving area of both is the same, and a pressure-receiving part is provided in the valve 32 that slides due to the pressure difference between port A and port B to reduce the pressure-receiving area on the low pressure side, and is pushed by a spring 42. A safety valve characterized in that a free piston 34 is provided to lower the communication operation start pressure of the valve 32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8067090U JPH0439474U (en) | 1990-07-31 | 1990-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8067090U JPH0439474U (en) | 1990-07-31 | 1990-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0439474U true JPH0439474U (en) | 1992-04-03 |
Family
ID=31625940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8067090U Pending JPH0439474U (en) | 1990-07-31 | 1990-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0439474U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023277985A1 (en) * | 2021-07-02 | 2023-01-05 | Sun Hydraulics, Llc | Bidirectional pressure relief valve |
-
1990
- 1990-07-31 JP JP8067090U patent/JPH0439474U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023277985A1 (en) * | 2021-07-02 | 2023-01-05 | Sun Hydraulics, Llc | Bidirectional pressure relief valve |