JPS56142991A - Drilling bit - Google Patents

Drilling bit

Info

Publication number
JPS56142991A
JPS56142991A JP4417480A JP4417480A JPS56142991A JP S56142991 A JPS56142991 A JP S56142991A JP 4417480 A JP4417480 A JP 4417480A JP 4417480 A JP4417480 A JP 4417480A JP S56142991 A JPS56142991 A JP S56142991A
Authority
JP
Japan
Prior art keywords
drilling bit
drilling
bit
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
JP4417480A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6118636B2 (enrdf_load_stackoverflow
Inventor
Takao Shibukawa
Mitsutoshi Katsuki
Taiji Nishio
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.)
Mazda Motor Corp
Original Assignee
Toyo Kogyo Co Ltd
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 Toyo Kogyo Co Ltd filed Critical Toyo Kogyo Co Ltd
Priority to JP4417480A priority Critical patent/JPS56142991A/ja
Publication of JPS56142991A publication Critical patent/JPS56142991A/ja
Publication of JPS6118636B2 publication Critical patent/JPS6118636B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP4417480A 1980-04-03 1980-04-03 Drilling bit Granted JPS56142991A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4417480A JPS56142991A (en) 1980-04-03 1980-04-03 Drilling bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4417480A JPS56142991A (en) 1980-04-03 1980-04-03 Drilling bit

Publications (2)

Publication Number Publication Date
JPS56142991A true JPS56142991A (en) 1981-11-07
JPS6118636B2 JPS6118636B2 (enrdf_load_stackoverflow) 1986-05-13

Family

ID=12684209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4417480A Granted JPS56142991A (en) 1980-04-03 1980-04-03 Drilling bit

Country Status (1)

Country Link
JP (1) JPS56142991A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61116892U (enrdf_load_stackoverflow) * 1984-12-28 1986-07-23
JPH0273494U (enrdf_load_stackoverflow) * 1988-11-24 1990-06-05

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61116892U (enrdf_load_stackoverflow) * 1984-12-28 1986-07-23
JPH0273494U (enrdf_load_stackoverflow) * 1988-11-24 1990-06-05

Also Published As

Publication number Publication date
JPS6118636B2 (enrdf_load_stackoverflow) 1986-05-13

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