JPS5469676A - Oil pressure control system - Google Patents
Oil pressure control systemInfo
- 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
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
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)
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 |
-
1977
- 1977-11-12 JP JP13596277A patent/JPS5469676A/en active Pending
Cited By (5)
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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