JPH032090U - - Google Patents
Info
- Publication number
- JPH032090U JPH032090U JP6292789U JP6292789U JPH032090U JP H032090 U JPH032090 U JP H032090U JP 6292789 U JP6292789 U JP 6292789U JP 6292789 U JP6292789 U JP 6292789U JP H032090 U JPH032090 U JP H032090U
- Authority
- JP
- Japan
- Prior art keywords
- reaction force
- air hammer
- casing
- rotary
- holes
- 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.)
- Granted
Links
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989062927U JPH0726475Y2 (ja) | 1989-05-30 | 1989-05-30 | 簡易エアーハンマー掘削機 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989062927U JPH0726475Y2 (ja) | 1989-05-30 | 1989-05-30 | 簡易エアーハンマー掘削機 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH032090U true JPH032090U (enExample) | 1991-01-10 |
| JPH0726475Y2 JPH0726475Y2 (ja) | 1995-06-14 |
Family
ID=31592519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989062927U Expired - Lifetime JPH0726475Y2 (ja) | 1989-05-30 | 1989-05-30 | 簡易エアーハンマー掘削機 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0726475Y2 (enExample) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000080876A (ja) * | 1998-09-07 | 2000-03-21 | Yokoyama Kiso Koji:Kk | 穿孔工法用回転反力支持装置 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS557336A (en) * | 1978-07-01 | 1980-01-19 | Taisei Corp | Rock bed drilling method and apparatus |
| JPH01111985A (ja) * | 1987-10-22 | 1989-04-28 | Takenaka Komuten Co Ltd | リバースサーキュレーション工法用掘削機の垂直建入れ精度管理装置 |
-
1989
- 1989-05-30 JP JP1989062927U patent/JPH0726475Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS557336A (en) * | 1978-07-01 | 1980-01-19 | Taisei Corp | Rock bed drilling method and apparatus |
| JPH01111985A (ja) * | 1987-10-22 | 1989-04-28 | Takenaka Komuten Co Ltd | リバースサーキュレーション工法用掘削機の垂直建入れ精度管理装置 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000080876A (ja) * | 1998-09-07 | 2000-03-21 | Yokoyama Kiso Koji:Kk | 穿孔工法用回転反力支持装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0726475Y2 (ja) | 1995-06-14 |