JPS6139450B2 - - Google Patents
Info
- Publication number
- JPS6139450B2 JPS6139450B2 JP55151243A JP15124380A JPS6139450B2 JP S6139450 B2 JPS6139450 B2 JP S6139450B2 JP 55151243 A JP55151243 A JP 55151243A JP 15124380 A JP15124380 A JP 15124380A JP S6139450 B2 JPS6139450 B2 JP S6139450B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- valve
- boom
- oil
- switching valve
- 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
Links
- 238000006073 displacement reaction Methods 0.000 claims description 29
- 238000010276 construction Methods 0.000 claims description 7
- 239000003921 oil Substances 0.000 description 81
- 230000007935 neutral effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002689 soil 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
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)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55151243A JPS5774442A (en) | 1980-10-27 | 1980-10-27 | Construction machinery such as power shovel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55151243A JPS5774442A (en) | 1980-10-27 | 1980-10-27 | Construction machinery such as power shovel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5774442A JPS5774442A (en) | 1982-05-10 |
| JPS6139450B2 true JPS6139450B2 (de) | 1986-09-04 |
Family
ID=15514383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55151243A Granted JPS5774442A (en) | 1980-10-27 | 1980-10-27 | Construction machinery such as power shovel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5774442A (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58213927A (ja) * | 1982-06-07 | 1983-12-13 | Daikin Ind Ltd | パワ−シヨベル等の建設機械 |
-
1980
- 1980-10-27 JP JP55151243A patent/JPS5774442A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5774442A (en) | 1982-05-10 |
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