JPH0434230Y2 - - Google Patents
Info
- Publication number
- JPH0434230Y2 JPH0434230Y2 JP8640186U JP8640186U JPH0434230Y2 JP H0434230 Y2 JPH0434230 Y2 JP H0434230Y2 JP 8640186 U JP8640186 U JP 8640186U JP 8640186 U JP8640186 U JP 8640186U JP H0434230 Y2 JPH0434230 Y2 JP H0434230Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- bit
- outer cylinder
- sealing material
- connecting member
- 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
- 238000009527 percussion Methods 0.000 claims description 19
- 239000003566 sealing material Substances 0.000 claims description 19
- 238000005553 drilling Methods 0.000 claims description 18
- 238000009412 basement excavation Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000005520 cutting process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8640186U JPH0434230Y2 (en]) | 1986-06-06 | 1986-06-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8640186U JPH0434230Y2 (en]) | 1986-06-06 | 1986-06-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62200785U JPS62200785U (en]) | 1987-12-21 |
| JPH0434230Y2 true JPH0434230Y2 (en]) | 1992-08-14 |
Family
ID=30942672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8640186U Expired JPH0434230Y2 (en]) | 1986-06-06 | 1986-06-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0434230Y2 (en]) |
-
1986
- 1986-06-06 JP JP8640186U patent/JPH0434230Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62200785U (en]) | 1987-12-21 |
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