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JPS56143874A - Pressure control valve - Google Patents

Pressure control valve

Info

Publication number
JPS56143874A
JPS56143874A JP4777580A JP4777580A JPS56143874A JP S56143874 A JPS56143874 A JP S56143874A JP 4777580 A JP4777580 A JP 4777580A JP 4777580 A JP4777580 A JP 4777580A JP S56143874 A JPS56143874 A JP S56143874A
Authority
JP
Japan
Prior art keywords
pressure
pilot
back pressure
opened
poppet
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
Application number
JP4777580A
Other languages
Japanese (ja)
Inventor
Shizuo Matsumura
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.)
KYB Corp
Original Assignee
Kayaba Industry Co Ltd
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 Kayaba Industry Co Ltd filed Critical Kayaba Industry Co Ltd
Priority to JP4777580A priority Critical patent/JPS56143874A/en
Publication of JPS56143874A publication Critical patent/JPS56143874A/en
Pending legal-status Critical Current

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  • Safety Valves (AREA)

Abstract

PURPOSE: To provide a stabilized pressure for use in controlling a relief pressure just after the relief poppet is opened by a method wherein a back pressure is applied downstream of the pilot popett in a pressure control valve for releasing the pressure.
CONSTITUTION: Since the pilot flow from the back pressure chamber 11 when the pilot poppet 13 is opened flows against the back pressure popett 20 through the spring 22 during a flowing-out of the passage hole 17, annular passage 21 to the low pressure relief port 2, a constant back pressure is applied to the pilot flow, thus it is possible to prevent a rapid decrease of pressure in the back pressure chamber 11 at the moment when the pilot poppet 13 is opened and further it is possible to provide a stable operation under a prevention of the generation of peak control pressure value.
COPYRIGHT: (C)1981,JPO&Japio
JP4777580A 1980-04-11 1980-04-11 Pressure control valve Pending JPS56143874A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4777580A JPS56143874A (en) 1980-04-11 1980-04-11 Pressure control valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4777580A JPS56143874A (en) 1980-04-11 1980-04-11 Pressure control valve

Publications (1)

Publication Number Publication Date
JPS56143874A true JPS56143874A (en) 1981-11-09

Family

ID=12784746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4777580A Pending JPS56143874A (en) 1980-04-11 1980-04-11 Pressure control valve

Country Status (1)

Country Link
JP (1) JPS56143874A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57171171A (en) * 1981-04-14 1982-10-21 Hitachi Constr Mach Co Ltd Pressure control valve
WO2011060857A1 (en) * 2009-11-17 2011-05-26 Robert Bosch Gmbh Pilot-operated pressure control valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57171171A (en) * 1981-04-14 1982-10-21 Hitachi Constr Mach Co Ltd Pressure control valve
JPH0240913B2 (en) * 1981-04-14 1990-09-13 Hitachi Construction Machinery
WO2011060857A1 (en) * 2009-11-17 2011-05-26 Robert Bosch Gmbh Pilot-operated pressure control valve
CN102713381A (en) * 2009-11-17 2012-10-03 罗伯特·博世有限公司 Pilot-operated pressure control valve
US9512930B2 (en) 2009-11-17 2016-12-06 Robert Bosch Gmbh Pilot-operated pressure control valve

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