JPS5469676A - Oil pressure control system - Google Patents

Oil pressure control system

Info

Publication number
JPS5469676A
JPS5469676A JP13596277A JP13596277A JPS5469676A JP S5469676 A JPS5469676 A JP S5469676A JP 13596277 A JP13596277 A JP 13596277A JP 13596277 A JP13596277 A JP 13596277A JP S5469676 A JPS5469676 A JP S5469676A
Authority
JP
Japan
Prior art keywords
oil
valve
pressure
oil pressure
drain circuit
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
JP13596277A
Other languages
Japanese (ja)
Inventor
Yutaka Hirata
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.)
Kawasaki Heavy Industries Ltd
Original Assignee
Kawasaki Heavy Industries 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 Kawasaki Heavy Industries Ltd filed Critical Kawasaki Heavy Industries Ltd
Priority to JP13596277A priority Critical patent/JPS5469676A/en
Publication of JPS5469676A publication Critical patent/JPS5469676A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent an supply oil from rising abnormally in back pressure by partially releasing supply oil from a drain circuit through a low-pressure-selecting valve at the point when an oil pressure actuator applied with great inertia load is stopped to run.
CONSTITUTION: An oil pressure motor M on which a great inertia load W is applied, is connected with a cross-over releaf valve 3 by a mated oil course 1, 2. The releaf valve 3 is connected with an oil pressure pump 10 by a double counter balance valve 6 and an open center port 3-position change valve 9. A pilot spring- centered low pressure selection valve 55 has three of an inlet port connected with the oil courses 1, 2, a pilot port, and an outlet port connected with a drain circuit 57 including a throttle 56. Once the discharge oil course increases abnormally in internal pressure at braking, the valve 55 is shifted from the neutral position to release a part of oil pressure into the drain circuit 57.
COPYRIGHT: (C)1979,JPO&Japio
JP13596277A 1977-11-12 1977-11-12 Oil pressure control system Pending JPS5469676A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13596277A JPS5469676A (en) 1977-11-12 1977-11-12 Oil pressure control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13596277A JPS5469676A (en) 1977-11-12 1977-11-12 Oil pressure control system

Publications (1)

Publication Number Publication Date
JPS5469676A true JPS5469676A (en) 1979-06-04

Family

ID=15163909

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13596277A Pending JPS5469676A (en) 1977-11-12 1977-11-12 Oil pressure control system

Country Status (1)

Country Link
JP (1) JPS5469676A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57112102U (en) * 1980-12-29 1982-07-10
US5025626A (en) * 1989-08-31 1991-06-25 Caterpillar Inc. Cushioned swing circuit
US5197284A (en) * 1989-07-21 1993-03-30 Cartner Jack O Hydraulic motor deceleration system
WO1996030651A1 (en) * 1995-03-24 1996-10-03 Komatsu Ltd. Driving device for a hydraulic motor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57112102U (en) * 1980-12-29 1982-07-10
US5197284A (en) * 1989-07-21 1993-03-30 Cartner Jack O Hydraulic motor deceleration system
US5025626A (en) * 1989-08-31 1991-06-25 Caterpillar Inc. Cushioned swing circuit
WO1996030651A1 (en) * 1995-03-24 1996-10-03 Komatsu Ltd. Driving device for a hydraulic motor
US5930997A (en) * 1995-03-24 1999-08-03 Komatsu Ltd. Driving device for a hydraulic motor

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