KR890017431A - Hydraulic circuit for civil construction machinery - Google Patents
Hydraulic circuit for civil construction machinery Download PDFInfo
- Publication number
- KR890017431A KR890017431A KR1019890006775A KR890006775A KR890017431A KR 890017431 A KR890017431 A KR 890017431A KR 1019890006775 A KR1019890006775 A KR 1019890006775A KR 890006775 A KR890006775 A KR 890006775A KR 890017431 A KR890017431 A KR 890017431A
- Authority
- KR
- South Korea
- Prior art keywords
- valve
- actuator
- construction machinery
- civil construction
- hydraulic circuit
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
내용 없음No content
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 본 발명에 관한 토목건설기계용 유압회로의 한실시예를 나타내는 유압계통도. 제2도는 제1도에 있어서 유압회로에 사용되는 파일럿첵밸브(pilot check valve)의 한 구성예를 나타내는 요부구조단면도. 제3도는 제2도에 있어서 파일럿첵밸브의 변형예를 나타내는 요부구조단면도.1 is a hydraulic system showing an embodiment of a hydraulic circuit for civil construction machinery according to the present invention. FIG. 2 is a sectional view showing the principal parts of a structural example of a pilot check valve used in a hydraulic circuit in FIG. 3 is a sectional view showing the principal parts of a structural example of a pilot check valve in FIG.
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63123338A JP2675066B2 (en) | 1988-05-20 | 1988-05-20 | Hydraulic circuits for civil engineering and construction machinery |
JP63-123338 | 1991-05-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR890017431A true KR890017431A (en) | 1989-12-16 |
KR0128094B1 KR0128094B1 (en) | 1998-04-08 |
Family
ID=14858096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019890006775A KR0128094B1 (en) | 1988-05-20 | 1989-05-20 | Oil-pressure control circuit of construction machine |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2675066B2 (en) |
KR (1) | KR0128094B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0288825A (en) * | 1988-09-26 | 1990-03-29 | Yutani Heavy Ind Ltd | Hydraulic circuit of construction machinery |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62140204U (en) * | 1986-02-28 | 1987-09-04 | ||
JPS635057U (en) * | 1986-06-30 | 1988-01-13 |
-
1988
- 1988-05-20 JP JP63123338A patent/JP2675066B2/en not_active Expired - Lifetime
-
1989
- 1989-05-20 KR KR1019890006775A patent/KR0128094B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR0128094B1 (en) | 1998-04-08 |
JP2675066B2 (en) | 1997-11-12 |
JPH01295928A (en) | 1989-11-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0402474B1 (en) | Service valve circuit in a hydraulic excavator | |
KR890014843A (en) | Hydraulic circuit for cylinder | |
KR910018230A (en) | Slewing Control for Crane | |
KR960023845A (en) | Hydraulic circuit using anti-tol valve of forklift | |
KR940005896A (en) | Hydraulic circuit structure of backhoe device | |
US4055046A (en) | Control system having override for fluid operated work elements | |
KR910015762A (en) | Hydraulic circuit for hydraulic construction and working machinery | |
KR930703542A (en) | Hydraulic drive system of construction machinery | |
ES507604A0 (en) | AN ELECTRO-HYDRAULIC CONTROL INSTALLATION TO CONTROL A PLURALITY OF HYDRAULIC LOADING DEVICES. | |
ATE298395T1 (en) | WAY VALVE | |
KR920004735A (en) | Pilot pressure control circuit of switching valve in actuator drive circuit | |
JPS57205639A (en) | Closing device for oil-pressure circuit for inertia-mass driving | |
EP0921320A4 (en) | Hydraulic drive device and direction switchover valve for hydraulic machine | |
DE4431103C2 (en) | Hydraulic operating unit | |
CA2133267A1 (en) | Valve Control Unit for Hydraulic Actuator | |
KR910014637A (en) | Counterbalance valve with relief | |
KR890017431A (en) | Hydraulic circuit for civil construction machinery | |
KR830010259A (en) | Hydraulic circuit system of civil construction machinery | |
KR900701592A (en) | Hydraulic circuit device of construction vehicle | |
KR950003940A (en) | Direction and speed control device of hydraulic actuator | |
KR960001442A (en) | Servovalve timer for fuel injection pump | |
KR920703938A (en) | Attachment Flow Switch | |
KR830008077A (en) | Control method and system of hydraulic drive system | |
KR910008294A (en) | Load pressure compensation pump discharge flow rate control circuit | |
ES8402641A1 (en) | Hydraulic control system for a hydraulic actuator. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20040610 Year of fee payment: 8 |
|
LAPS | Lapse due to unpaid annual fee |