JPS6326237B2 - - Google Patents
Info
- Publication number
- JPS6326237B2 JPS6326237B2 JP11232281A JP11232281A JPS6326237B2 JP S6326237 B2 JPS6326237 B2 JP S6326237B2 JP 11232281 A JP11232281 A JP 11232281A JP 11232281 A JP11232281 A JP 11232281A JP S6326237 B2 JPS6326237 B2 JP S6326237B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- valve
- hydraulic pump
- control
- bucket
- 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
- 238000009412 basement excavation Methods 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000005553 drilling Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 description 7
- 239000002689 soil Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11232281A JPS5813888A (ja) | 1981-07-20 | 1981-07-20 | ア−スドリル用掘削バケツトの回転速度制御回路 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11232281A JPS5813888A (ja) | 1981-07-20 | 1981-07-20 | ア−スドリル用掘削バケツトの回転速度制御回路 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5813888A JPS5813888A (ja) | 1983-01-26 |
| JPS6326237B2 true JPS6326237B2 (en, 2012) | 1988-05-28 |
Family
ID=14583767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11232281A Granted JPS5813888A (ja) | 1981-07-20 | 1981-07-20 | ア−スドリル用掘削バケツトの回転速度制御回路 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5813888A (en, 2012) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1182328B (it) * | 1984-12-19 | 1987-10-05 | Cselt Centro Studi Lab Telecom | Accoppiatore per fibre ottiche |
| JP6564567B2 (ja) * | 2014-12-03 | 2019-08-21 | 日立建機株式会社 | 作業機械 |
-
1981
- 1981-07-20 JP JP11232281A patent/JPS5813888A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5813888A (ja) | 1983-01-26 |
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