JPS566893A - Bit for slidinggdown bottommexcavation drilling - Google Patents

Bit for slidinggdown bottommexcavation drilling

Info

Publication number
JPS566893A
JPS566893A JP8240079A JP8240079A JPS566893A JP S566893 A JPS566893 A JP S566893A JP 8240079 A JP8240079 A JP 8240079A JP 8240079 A JP8240079 A JP 8240079A JP S566893 A JPS566893 A JP S566893A
Authority
JP
Japan
Prior art keywords
slidinggdown
bottommexcavation
drilling
bit
slidinggdown bottommexcavation
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
JP8240079A
Other languages
Japanese (ja)
Other versions
JPS589231B2 (en
Inventor
Hachirou Inoue
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP54082400A priority Critical patent/JPS589231B2/en
Publication of JPS566893A publication Critical patent/JPS566893A/en
Publication of JPS589231B2 publication Critical patent/JPS589231B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP54082400A 1979-06-28 1979-06-28 Sliding type bottom expansion method bit Expired JPS589231B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54082400A JPS589231B2 (en) 1979-06-28 1979-06-28 Sliding type bottom expansion method bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54082400A JPS589231B2 (en) 1979-06-28 1979-06-28 Sliding type bottom expansion method bit

Publications (2)

Publication Number Publication Date
JPS566893A true JPS566893A (en) 1981-01-24
JPS589231B2 JPS589231B2 (en) 1983-02-19

Family

ID=13773537

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54082400A Expired JPS589231B2 (en) 1979-06-28 1979-06-28 Sliding type bottom expansion method bit

Country Status (1)

Country Link
JP (1) JPS589231B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61273746A (en) * 1985-05-28 1986-12-04 Victor Co Of Japan Ltd Optical head
JP2006219911A (en) * 2005-02-10 2006-08-24 Ohbayashi Corp Pile mine widening device and method for cast-in-place concrete pile

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245043U (en) * 1975-09-19 1977-03-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245043U (en) * 1975-09-19 1977-03-30

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61273746A (en) * 1985-05-28 1986-12-04 Victor Co Of Japan Ltd Optical head
JP2006219911A (en) * 2005-02-10 2006-08-24 Ohbayashi Corp Pile mine widening device and method for cast-in-place concrete pile

Also Published As

Publication number Publication date
JPS589231B2 (en) 1983-02-19

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