JPS5614670A - Logic valve - Google Patents
Logic valveInfo
- Publication number
- JPS5614670A JPS5614670A JP8742279A JP8742279A JPS5614670A JP S5614670 A JPS5614670 A JP S5614670A JP 8742279 A JP8742279 A JP 8742279A JP 8742279 A JP8742279 A JP 8742279A JP S5614670 A JPS5614670 A JP S5614670A
- Authority
- JP
- Japan
- Prior art keywords
- poppet
- logic valve
- valve
- solenoid valve
- logic
- 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.)
- Granted
Links
Landscapes
- Fluid-Driven Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To reduce the closing time required to close a logic valve after the discharge rate of a variable displacement hydraulic pump is decreased to around zero "0", by using the logic valve, which performs the fluid connection or disconnection of a hydraulic circuit through the closing or opening of a poppet, in a closed hydraulic circuit for controlling the pump.
CONSTITUTION: A poppet 10, conduit 13 connected to an actuator, spring 16, shuttle valves 22, 23 and solenoid valve 21 are provided in a logic valve. When the solenoid valve 21 is at position A, the higher pressure between pressures of conduits 12, 13 acts on the rear face of the poppet 10 and the poppet is thus pushed down by the pressure and spring 16 so that the logic valve is closed. On the contrary, when the solenoid valve 21 is at position B, the lower pressure between the pressures of conduits 12, 13 acts on the rear face of the poppet 10. In such a manner, the logic valve may not be opened simultaneously with an opening of the solenoid valve, thus prohibiting their corresponding actuators to work suddenly.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8742279A JPS5614670A (en) | 1979-07-12 | 1979-07-12 | Logic valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8742279A JPS5614670A (en) | 1979-07-12 | 1979-07-12 | Logic valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5614670A true JPS5614670A (en) | 1981-02-12 |
JPH0115751B2 JPH0115751B2 (en) | 1989-03-20 |
Family
ID=13914429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8742279A Granted JPS5614670A (en) | 1979-07-12 | 1979-07-12 | Logic valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5614670A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0111007A1 (en) * | 1982-06-02 | 1984-06-20 | Hitachi Construction Machinery Co., Ltd. | Control valve linking device |
JPH01171902U (en) * | 1988-05-24 | 1989-12-06 |
-
1979
- 1979-07-12 JP JP8742279A patent/JPS5614670A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0111007A1 (en) * | 1982-06-02 | 1984-06-20 | Hitachi Construction Machinery Co., Ltd. | Control valve linking device |
EP0111007B1 (en) * | 1982-06-02 | 1986-12-30 | Hitachi Construction Machinery Co., Ltd. | Control valve linking device |
JPH01171902U (en) * | 1988-05-24 | 1989-12-06 |
Also Published As
Publication number | Publication date |
---|---|
JPH0115751B2 (en) | 1989-03-20 |
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