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JPS542202A - Drill bit internally equipped with percussion - Google Patents

Drill bit internally equipped with percussion

Info

Publication number
JPS542202A
JPS542202A JP6773377A JP6773377A JPS542202A JP S542202 A JPS542202 A JP S542202A JP 6773377 A JP6773377 A JP 6773377A JP 6773377 A JP6773377 A JP 6773377A JP S542202 A JPS542202 A JP S542202A
Authority
JP
Japan
Prior art keywords
percussion
drill bit
internally equipped
bit internally
drill
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
JP6773377A
Other languages
Japanese (ja)
Other versions
JPS5617509B2 (en
Inventor
Yoshikazu Kumamoto
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.)
Koken Boring Machine Co Ltd
Original Assignee
Koken Boring Machine 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 Koken Boring Machine Co Ltd filed Critical Koken Boring Machine Co Ltd
Priority to JP6773377A priority Critical patent/JPS542202A/en
Publication of JPS542202A publication Critical patent/JPS542202A/en
Publication of JPS5617509B2 publication Critical patent/JPS5617509B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP6773377A 1977-06-08 1977-06-08 Drill bit internally equipped with percussion Granted JPS542202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6773377A JPS542202A (en) 1977-06-08 1977-06-08 Drill bit internally equipped with percussion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6773377A JPS542202A (en) 1977-06-08 1977-06-08 Drill bit internally equipped with percussion

Publications (2)

Publication Number Publication Date
JPS542202A true JPS542202A (en) 1979-01-09
JPS5617509B2 JPS5617509B2 (en) 1981-04-22

Family

ID=13353440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6773377A Granted JPS542202A (en) 1977-06-08 1977-06-08 Drill bit internally equipped with percussion

Country Status (1)

Country Link
JP (1) JPS542202A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010522B1 (en) * 1970-05-29 1975-04-22

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5324145B2 (en) * 1973-05-25 1978-07-19

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010522B1 (en) * 1970-05-29 1975-04-22

Also Published As

Publication number Publication date
JPS5617509B2 (en) 1981-04-22

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