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
Application number
JP16578284U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0344874Y2 (US06534493-20030318-C00166.png
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP16578284U priority Critical patent/JPH0344874Y2/ja
Publication of JPS6180893U publication Critical patent/JPS6180893U/ja
Application granted granted Critical
Publication of JPH0344874Y2 publication Critical patent/JPH0344874Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Excavating Of Shafts Or Tunnels (AREA)
JP16578284U 1984-11-02 1984-11-02 Expired JPH0344874Y2 (US06534493-20030318-C00166.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16578284U JPH0344874Y2 (US06534493-20030318-C00166.png) 1984-11-02 1984-11-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16578284U JPH0344874Y2 (US06534493-20030318-C00166.png) 1984-11-02 1984-11-02

Publications (2)

Publication Number Publication Date
JPS6180893U true JPS6180893U (US06534493-20030318-C00166.png) 1986-05-29
JPH0344874Y2 JPH0344874Y2 (US06534493-20030318-C00166.png) 1991-09-20

Family

ID=30723622

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16578284U Expired JPH0344874Y2 (US06534493-20030318-C00166.png) 1984-11-02 1984-11-02

Country Status (1)

Country Link
JP (1) JPH0344874Y2 (US06534493-20030318-C00166.png)

Also Published As

Publication number Publication date
JPH0344874Y2 (US06534493-20030318-C00166.png) 1991-09-20

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