JPH057353Y2 - - Google Patents
Info
- Publication number
- JPH057353Y2 JPH057353Y2 JP4025487U JP4025487U JPH057353Y2 JP H057353 Y2 JPH057353 Y2 JP H057353Y2 JP 4025487 U JP4025487 U JP 4025487U JP 4025487 U JP4025487 U JP 4025487U JP H057353 Y2 JPH057353 Y2 JP H057353Y2
- Authority
- JP
- Japan
- Prior art keywords
- tip
- bit
- bit body
- head
- groove
- 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
- 239000012530 fluid Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000005553 drilling Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000011435 rock Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 241001070941 Castanea Species 0.000 description 1
- 235000014036 Castanea Nutrition 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4025487U JPH057353Y2 (en)van) | 1987-03-19 | 1987-03-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4025487U JPH057353Y2 (en)van) | 1987-03-19 | 1987-03-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63151592U JPS63151592U (en)van) | 1988-10-05 |
| JPH057353Y2 true JPH057353Y2 (en)van) | 1993-02-24 |
Family
ID=30854182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4025487U Expired - Lifetime JPH057353Y2 (en)van) | 1987-03-19 | 1987-03-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH057353Y2 (en)van) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0732622Y2 (ja) * | 1990-03-26 | 1995-07-26 | 三菱マテリアル株式会社 | 二重管式掘削工具 |
-
1987
- 1987-03-19 JP JP4025487U patent/JPH057353Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63151592U (en)van) | 1988-10-05 |
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