JPH0245352Y2 - - Google Patents
Info
- Publication number
- JPH0245352Y2 JPH0245352Y2 JP1985046016U JP4601685U JPH0245352Y2 JP H0245352 Y2 JPH0245352 Y2 JP H0245352Y2 JP 1985046016 U JP1985046016 U JP 1985046016U JP 4601685 U JP4601685 U JP 4601685U JP H0245352 Y2 JPH0245352 Y2 JP H0245352Y2
- Authority
- JP
- Japan
- Prior art keywords
- head
- bit
- blade
- gutter
- crushed debris
- 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
- 239000011435 rock Substances 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000007664 blowing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1985046016U JPH0245352Y2 (fr) | 1985-03-29 | 1985-03-29 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1985046016U JPH0245352Y2 (fr) | 1985-03-29 | 1985-03-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61164388U JPS61164388U (fr) | 1986-10-11 |
JPH0245352Y2 true JPH0245352Y2 (fr) | 1990-11-30 |
Family
ID=30560030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1985046016U Expired JPH0245352Y2 (fr) | 1985-03-29 | 1985-03-29 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0245352Y2 (fr) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5546294A (en) * | 1978-09-22 | 1980-03-31 | Du Pont | Gold conductor composition |
-
1985
- 1985-03-29 JP JP1985046016U patent/JPH0245352Y2/ja not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5546294A (en) * | 1978-09-22 | 1980-03-31 | Du Pont | Gold conductor composition |
Also Published As
Publication number | Publication date |
---|---|
JPS61164388U (fr) | 1986-10-11 |
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