JPS5517750A - Control valve - Google Patents
Control valveInfo
- Publication number
- JPS5517750A JPS5517750A JP8976178A JP8976178A JPS5517750A JP S5517750 A JPS5517750 A JP S5517750A JP 8976178 A JP8976178 A JP 8976178A JP 8976178 A JP8976178 A JP 8976178A JP S5517750 A JPS5517750 A JP S5517750A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- spool
- orifice
- reducing valve
- 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
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To simplify a device and also to decrease loss of an oil flow, by locating a reducing valve between a hydraulic drive source and a cylinder and by allowing the reducing valve to perform a relieve functioning as well.
CONSTITUTION: Orifices 12 and 13 placed at a spool 11 of a reducing valve are moved according to the balance of a hydraulic pressure, which is applied through a pilot passage 6, and a spring. While a piston 9a is moving to the right after turning on a switch valve 10, a pressure of a cylinder port B can be kept constant by adjusting condition of the orifice 12 by means of the spool 11. When the piston 9a reaches a stroke, the pressure of the cylinder port B rises, and the pressure in chambers 14 and 15 increase. And as a result the spool 11 closes the orifice 12 and opens the orifice 13. And thus, an oil volume branching to a pump port A can be only an oil volume being equivalent to the leackage.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8976178A JPS5517750A (en) | 1978-07-21 | 1978-07-21 | Control valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8976178A JPS5517750A (en) | 1978-07-21 | 1978-07-21 | Control valve |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5517750A true JPS5517750A (en) | 1980-02-07 |
Family
ID=13979689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8976178A Pending JPS5517750A (en) | 1978-07-21 | 1978-07-21 | Control valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5517750A (en) |
-
1978
- 1978-07-21 JP JP8976178A patent/JPS5517750A/en active Pending
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