JPH0329930B2 - - Google Patents
Info
- Publication number
- JPH0329930B2 JPH0329930B2 JP8918483A JP8918483A JPH0329930B2 JP H0329930 B2 JPH0329930 B2 JP H0329930B2 JP 8918483 A JP8918483 A JP 8918483A JP 8918483 A JP8918483 A JP 8918483A JP H0329930 B2 JPH0329930 B2 JP H0329930B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- hydraulic
- cylinder
- boom
- 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.)
- Expired - Lifetime
Links
- 238000005336 cracking Methods 0.000 claims description 15
- 238000010586 diagram Methods 0.000 description 10
- 230000007935 neutral effect Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000002040 relaxant effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
Landscapes
- Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Component Parts Of Construction Machinery (AREA)
- Control And Safety Of Cranes (AREA)
- Jib Cranes (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8918483A JPS59217839A (ja) | 1983-05-23 | 1983-05-23 | クレ−ン兼用の油圧シヨベルの油圧回路 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8918483A JPS59217839A (ja) | 1983-05-23 | 1983-05-23 | クレ−ン兼用の油圧シヨベルの油圧回路 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59217839A JPS59217839A (ja) | 1984-12-08 |
| JPH0329930B2 true JPH0329930B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1991-04-25 |
Family
ID=13963654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8918483A Granted JPS59217839A (ja) | 1983-05-23 | 1983-05-23 | クレ−ン兼用の油圧シヨベルの油圧回路 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59217839A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4711793B2 (ja) * | 2005-09-26 | 2011-06-29 | 株式会社加藤製作所 | ブーム起伏用油圧回路 |
| JP6982517B2 (ja) * | 2018-02-27 | 2021-12-17 | Ｋｙｂ−Ｙｓ株式会社 | 流体圧制御装置 |
| CN108773784A (zh) * | 2018-07-17 | 2018-11-09 | 北京市第三建筑工程有限公司 | 提升器 |
-
1983
- 1983-05-23 JP JP8918483A patent/JPS59217839A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59217839A (ja) | 1984-12-08 |