JPS6437593U - - Google Patents
Info
- Publication number
- JPS6437593U JPS6437593U JP12882087U JP12882087U JPS6437593U JP S6437593 U JPS6437593 U JP S6437593U JP 12882087 U JP12882087 U JP 12882087U JP 12882087 U JP12882087 U JP 12882087U JP S6437593 U JPS6437593 U JP S6437593U
- Authority
- JP
- Japan
- Prior art keywords
- bit
- upper bit
- spring
- expanding
- rotatable
- 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.)
- Pending
Links
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12882087U JPS6437593U (en, 2012) | 1987-08-22 | 1987-08-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12882087U JPS6437593U (en, 2012) | 1987-08-22 | 1987-08-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6437593U true JPS6437593U (en, 2012) | 1989-03-07 |
Family
ID=31382523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12882087U Pending JPS6437593U (en, 2012) | 1987-08-22 | 1987-08-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6437593U (en, 2012) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0312990U (en, 2012) * | 1989-06-16 | 1991-02-08 |
-
1987
- 1987-08-22 JP JP12882087U patent/JPS6437593U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0312990U (en, 2012) * | 1989-06-16 | 1991-02-08 |