JPS5686203A - Unloading circuit - Google Patents
Unloading circuitInfo
- Publication number
- JPS5686203A JPS5686203A JP16230779A JP16230779A JPS5686203A JP S5686203 A JPS5686203 A JP S5686203A JP 16230779 A JP16230779 A JP 16230779A JP 16230779 A JP16230779 A JP 16230779A JP S5686203 A JPS5686203 A JP S5686203A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pilot
- pressure
- closed
- cut
- 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 obtain an intended cut-in/cut-out pressure by a constitution wherein an unloading circuit of a fluid pressure container of a large capacity consists of a pilot operating circuit utilizing a small unloading relief valve and a large quantity on-off valve operated through the pilot operating circuit.
CONSTITUTION: When an unloading relief valve 23 is closed, an oil pressure change-over valve 12 is positioned at a function position A and makes a pilot line 16 of a pilot check valve 15 communicate to a tank 7. Accordingly, the valve 15 is closed and an on-off valve 5 is closed because of a liquid pressure of a main duct 2 side operating the pilot chamber 11 and a delivery liquid from an oil pressure pump 1 is fed to a large capacity fluid pressure container which is not shown in a figure, through the main duct 2. At this time, when a pilot pressure Pi of a pilot duct 13 reaches an cut-out pressure, a relief valve 23 is opened and the change-over valve 12 is changed-over to a position B. With this, the valves 15 and 5 are opened, sequentially and the pump delivery liquid is returned to the tank 7 through a branched pipe 4.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16230779A JPS5686203A (en) | 1979-12-13 | 1979-12-13 | Unloading circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16230779A JPS5686203A (en) | 1979-12-13 | 1979-12-13 | Unloading circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5686203A true JPS5686203A (en) | 1981-07-13 |
Family
ID=15752014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16230779A Pending JPS5686203A (en) | 1979-12-13 | 1979-12-13 | Unloading circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5686203A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57177469A (en) * | 1981-04-06 | 1982-11-01 | Vapor Corp | Pilot operating relief valve |
| JPS6084802U (en) * | 1983-11-17 | 1985-06-11 | 東芝機械株式会社 | Multiple pump unloading device |
-
1979
- 1979-12-13 JP JP16230779A patent/JPS5686203A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57177469A (en) * | 1981-04-06 | 1982-11-01 | Vapor Corp | Pilot operating relief valve |
| JPH0355708B2 (en) * | 1981-04-06 | 1991-08-26 | ||
| JPS6084802U (en) * | 1983-11-17 | 1985-06-11 | 東芝機械株式会社 | Multiple pump unloading device |
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