JPS5563069A - Pilot check valve for low cracking pressure - Google Patents
Pilot check valve for low cracking pressureInfo
- Publication number
- JPS5563069A JPS5563069A JP13719578A JP13719578A JPS5563069A JP S5563069 A JPS5563069 A JP S5563069A JP 13719578 A JP13719578 A JP 13719578A JP 13719578 A JP13719578 A JP 13719578A JP S5563069 A JPS5563069 A JP S5563069A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- oil
- pressure
- check valve
- 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
- Check Valves (AREA)
- Safety Valves (AREA)
Abstract
PURPOSE: To open the pilot check valve by very low pilot pressure by communicating the backpressure chamber of the pressure receiving side of the valve to two oil chambers, which are cut off from each other by the valve, with a low pressure communicating valve.
CONSTITUTION: The oil chambers A, B of the pilot check valve are cut off from each other by setting the valve to the valve seat 1 while the oil pressure actuator is stopped. In this state, since pressure of the oil chamber B is higher than that of the oil chamber A, the low pressure communicating valve 8 communicates the backpressure chamber 6 to the oil chamber A. When the operation valve D is changed and pressurized oil is supplied to the oil passage F to drive the actuator C in the forward direction, a part of the oil is fed to the opening means 5. By this, the valve 4 is opened, exhaust oil is led to the oil passage E. At this time, when the pressure received area S in the seated valve is equal to that S' of pressure received part 7, only a small pilot pressure against the spring 3 is sufficient to open the check valve.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13719578A JPS5563069A (en) | 1978-11-06 | 1978-11-06 | Pilot check valve for low cracking pressure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13719578A JPS5563069A (en) | 1978-11-06 | 1978-11-06 | Pilot check valve for low cracking pressure |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5563069A true JPS5563069A (en) | 1980-05-12 |
Family
ID=15193011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13719578A Pending JPS5563069A (en) | 1978-11-06 | 1978-11-06 | Pilot check valve for low cracking pressure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5563069A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61165081A (en) * | 1985-01-16 | 1986-07-25 | Chiyoda Seiki:Kk | Relief valve |
JPH031369U (en) * | 1989-05-30 | 1991-01-09 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5236254U (en) * | 1975-09-05 | 1977-03-15 |
-
1978
- 1978-11-06 JP JP13719578A patent/JPS5563069A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5236254U (en) * | 1975-09-05 | 1977-03-15 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61165081A (en) * | 1985-01-16 | 1986-07-25 | Chiyoda Seiki:Kk | Relief valve |
JPH031369U (en) * | 1989-05-30 | 1991-01-09 |
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