JPS6238515B2 - - Google Patents

Info

Publication number
JPS6238515B2
JPS6238515B2 JP55129112A JP12911280A JPS6238515B2 JP S6238515 B2 JPS6238515 B2 JP S6238515B2 JP 55129112 A JP55129112 A JP 55129112A JP 12911280 A JP12911280 A JP 12911280A JP S6238515 B2 JPS6238515 B2 JP S6238515B2
Authority
JP
Japan
Prior art keywords
drill
bit
connecting block
diameter
drill rod
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
JP55129112A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5754693A (en
Inventor
Noboru Takashima
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.)
Nittoku Kensetsu KK
Original Assignee
Nittoku Kensetsu KK
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 Nittoku Kensetsu KK filed Critical Nittoku Kensetsu KK
Priority to JP12911280A priority Critical patent/JPS5754693A/ja
Publication of JPS5754693A publication Critical patent/JPS5754693A/ja
Publication of JPS6238515B2 publication Critical patent/JPS6238515B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP12911280A 1980-09-19 1980-09-19 Excavator Granted JPS5754693A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12911280A JPS5754693A (en) 1980-09-19 1980-09-19 Excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12911280A JPS5754693A (en) 1980-09-19 1980-09-19 Excavator

Publications (2)

Publication Number Publication Date
JPS5754693A JPS5754693A (en) 1982-04-01
JPS6238515B2 true JPS6238515B2 (US20080005853A1-20080110-C00027.png) 1987-08-18

Family

ID=15001359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12911280A Granted JPS5754693A (en) 1980-09-19 1980-09-19 Excavator

Country Status (1)

Country Link
JP (1) JPS5754693A (US20080005853A1-20080110-C00027.png)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5514068B2 (ja) 2010-10-22 2014-06-04 カヤバ工業株式会社 ベーンポンプ

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1221607A (en) * 1968-10-16 1971-02-03 Atlas Copco Ab Improvements in drilling equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1221607A (en) * 1968-10-16 1971-02-03 Atlas Copco Ab Improvements in drilling equipment

Also Published As

Publication number Publication date
JPS5754693A (en) 1982-04-01

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