JPS5563067A - Unloader valve - Google Patents

Unloader valve

Info

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
Application number
JP13587278A
Other languages
Japanese (ja)
Other versions
JPS6260589B2 (en
Inventor
Kiyoshi Nemoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maruyama Manufacturing Co Ltd
Maruyama Seisakusho KK
Original Assignee
Maruyama Manufacturing Co Ltd
Maruyama Seisakusho KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maruyama Manufacturing Co Ltd, Maruyama Seisakusho KK filed Critical Maruyama Manufacturing Co Ltd
Priority to JP13587278A priority Critical patent/JPS5563067A/en
Publication of JPS5563067A publication Critical patent/JPS5563067A/en
Publication of JPS6260589B2 publication Critical patent/JPS6260589B2/ja
Granted legal-status Critical Current

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
JP13587278A 1978-11-06 1978-11-06 Unloader valve Granted JPS5563067A (en)

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)

Also Published As

Publication number Publication date
JPS6260589B2 (en) 1987-12-17

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