JPS6323353B2 - - Google Patents

Info

Publication number
JPS6323353B2
JPS6323353B2 JP58094938A JP9493883A JPS6323353B2 JP S6323353 B2 JPS6323353 B2 JP S6323353B2 JP 58094938 A JP58094938 A JP 58094938A JP 9493883 A JP9493883 A JP 9493883A JP S6323353 B2 JPS6323353 B2 JP S6323353B2
Authority
JP
Japan
Prior art keywords
ram
cutter
side chamber
switching valve
support means
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
Application number
JP58094938A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59220593A (ja
Inventor
Hiroshi Aoki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nagano Hydraulics Inc
Original Assignee
Nagano Hydraulics Inc
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 Nagano Hydraulics Inc filed Critical Nagano Hydraulics Inc
Priority to JP9493883A priority Critical patent/JPS59220593A/ja
Publication of JPS59220593A publication Critical patent/JPS59220593A/ja
Publication of JPS6323353B2 publication Critical patent/JPS6323353B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP9493883A 1983-05-31 1983-05-31 穿孔装置 Granted JPS59220593A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9493883A JPS59220593A (ja) 1983-05-31 1983-05-31 穿孔装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9493883A JPS59220593A (ja) 1983-05-31 1983-05-31 穿孔装置

Publications (2)

Publication Number Publication Date
JPS59220593A JPS59220593A (ja) 1984-12-12
JPS6323353B2 true JPS6323353B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1988-05-16

Family

ID=14123891

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9493883A Granted JPS59220593A (ja) 1983-05-31 1983-05-31 穿孔装置

Country Status (1)

Country Link
JP (1) JPS59220593A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4800364B2 (ja) * 2008-09-26 2011-10-26 株式会社奥村組 コアボーリング装置及びこれを用いた貫通孔の穿設方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4526151Y1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1965-11-27 1970-10-12

Also Published As

Publication number Publication date
JPS59220593A (ja) 1984-12-12

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