JPS59116489U - 油圧拡大掘削装置における拡大ビツト等の作動装置 - Google Patents

油圧拡大掘削装置における拡大ビツト等の作動装置

Info

Publication number
JPS59116489U
JPS59116489U JP784383U JP784383U JPS59116489U JP S59116489 U JPS59116489 U JP S59116489U JP 784383 U JP784383 U JP 784383U JP 784383 U JP784383 U JP 784383U JP S59116489 U JPS59116489 U JP S59116489U
Authority
JP
Japan
Prior art keywords
expansion
hydraulic
check valve
drilling equipment
operating devices
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
JP784383U
Other languages
English (en)
Japanese (ja)
Other versions
JPS6315422Y2 (enrdf_load_stackoverflow
Inventor
一郎 田中
富永　政巳
Original Assignee
日本コンクリ−ト工業株式会社
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 by 日本コンクリ−ト工業株式会社 filed Critical 日本コンクリ−ト工業株式会社
Priority to JP784383U priority Critical patent/JPS59116489U/ja
Publication of JPS59116489U publication Critical patent/JPS59116489U/ja
Application granted granted Critical
Publication of JPS6315422Y2 publication Critical patent/JPS6315422Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP784383U 1983-01-25 1983-01-25 油圧拡大掘削装置における拡大ビツト等の作動装置 Granted JPS59116489U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP784383U JPS59116489U (ja) 1983-01-25 1983-01-25 油圧拡大掘削装置における拡大ビツト等の作動装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP784383U JPS59116489U (ja) 1983-01-25 1983-01-25 油圧拡大掘削装置における拡大ビツト等の作動装置

Publications (2)

Publication Number Publication Date
JPS59116489U true JPS59116489U (ja) 1984-08-06
JPS6315422Y2 JPS6315422Y2 (enrdf_load_stackoverflow) 1988-04-28

Family

ID=30139357

Family Applications (1)

Application Number Title Priority Date Filing Date
JP784383U Granted JPS59116489U (ja) 1983-01-25 1983-01-25 油圧拡大掘削装置における拡大ビツト等の作動装置

Country Status (1)

Country Link
JP (1) JPS59116489U (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006144374A (ja) * 2004-11-19 2006-06-08 Sanwa Kizai Co Ltd 掘削作業ロッドの流体圧式作業具駆動装置における作業具作動確認装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006144374A (ja) * 2004-11-19 2006-06-08 Sanwa Kizai Co Ltd 掘削作業ロッドの流体圧式作業具駆動装置における作業具作動確認装置

Also Published As

Publication number Publication date
JPS6315422Y2 (enrdf_load_stackoverflow) 1988-04-28

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