JPS5563067A - Unloader valve - Google Patents
Unloader valveInfo
- Publication number
- JPS5563067A JPS5563067A JP13587278A JP13587278A JPS5563067A JP S5563067 A JPS5563067 A JP S5563067A JP 13587278 A JP13587278 A JP 13587278A JP 13587278 A JP13587278 A JP 13587278A JP S5563067 A JPS5563067 A JP S5563067A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- piston
- valve
- acts
- liquid
- 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
Abstract
PURPOSE: To maintain the system pressure within a fixed range by opening and closing the valve by utilizing the pressure difference between the primary pressure that acts on the lower face of the piston and the secondary pressure that acts on the upper face of the piston after it passes through the orifice.
CONSTITUTION: The valve body 5a of valve rod 5 is located at a little distance from the valve seat 6 while the pump is not operated. When the pump is driven to open the nozzle N of the operation unit, pressurized liquid acts on the lower face of the piston 4 at pressure P0 and passes through the orifice 11 on pushing up the piston, the pressure P0 drops to P1. Part of the secondary liquid of pressure P1 flows into the cylinder 3' through the bypass 12. Thus the piston 4 is moved upwards and downwards by the pressure difference between both pressures that act on the upper and lower faces of the piston and by the load on spring 8, the pressure is maintained in a fixed range by moving the valve body up and down. When the nozzle is closed, the valve is reset to the initial state and the liquid is returned to the tank.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13587278A JPS5563067A (en) | 1978-11-06 | 1978-11-06 | Unloader valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13587278A JPS5563067A (en) | 1978-11-06 | 1978-11-06 | Unloader valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5563067A true JPS5563067A (en) | 1980-05-12 |
JPS6260589B2 JPS6260589B2 (en) | 1987-12-17 |
Family
ID=15161736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13587278A Granted JPS5563067A (en) | 1978-11-06 | 1978-11-06 | Unloader valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5563067A (en) |
-
1978
- 1978-11-06 JP JP13587278A patent/JPS5563067A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6260589B2 (en) | 1987-12-17 |
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