JPH0246550Y2 - - Google Patents
Info
- Publication number
- JPH0246550Y2 JPH0246550Y2 JP15438985U JP15438985U JPH0246550Y2 JP H0246550 Y2 JPH0246550 Y2 JP H0246550Y2 JP 15438985 U JP15438985 U JP 15438985U JP 15438985 U JP15438985 U JP 15438985U JP H0246550 Y2 JPH0246550 Y2 JP H0246550Y2
- Authority
- JP
- Japan
- Prior art keywords
- pick
- bracket
- roll pin
- elastic roll
- notch
- 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
- 230000037431 insertion Effects 0.000 claims description 16
- 238000003780 insertion Methods 0.000 claims description 16
- 238000009412 basement excavation Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000011435 rock Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15438985U JPH0246550Y2 (es) | 1985-10-11 | 1985-10-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15438985U JPH0246550Y2 (es) | 1985-10-11 | 1985-10-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6266990U JPS6266990U (es) | 1987-04-25 |
| JPH0246550Y2 true JPH0246550Y2 (es) | 1990-12-07 |
Family
ID=31074136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15438985U Expired JPH0246550Y2 (es) | 1985-10-11 | 1985-10-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0246550Y2 (es) |
-
1985
- 1985-10-11 JP JP15438985U patent/JPH0246550Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6266990U (es) | 1987-04-25 |
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