JPS6180893U - - Google Patents
Info
- Publication number
- JPS6180893U JPS6180893U JP16578284U JP16578284U JPS6180893U JP S6180893 U JPS6180893 U JP S6180893U JP 16578284 U JP16578284 U JP 16578284U JP 16578284 U JP16578284 U JP 16578284U JP S6180893 U JPS6180893 U JP S6180893U
- Authority
- JP
- Japan
- Prior art keywords
- ring body
- spacer
- pivot joints
- foldable
- ring shape
- 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.)
- Granted
Links
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16578284U JPH0344874Y2 ( ) | 1984-11-02 | 1984-11-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16578284U JPH0344874Y2 ( ) | 1984-11-02 | 1984-11-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6180893U true JPS6180893U ( ) | 1986-05-29 |
| JPH0344874Y2 JPH0344874Y2 ( ) | 1991-09-20 |
Family
ID=30723622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16578284U Expired JPH0344874Y2 ( ) | 1984-11-02 | 1984-11-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0344874Y2 ( ) |
-
1984
- 1984-11-02 JP JP16578284U patent/JPH0344874Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0344874Y2 ( ) | 1991-09-20 |