JPS53132403A - Bit for expanding hole - Google Patents

Bit for expanding hole

Info

Publication number
JPS53132403A
JPS53132403A JP4812277A JP4812277A JPS53132403A JP S53132403 A JPS53132403 A JP S53132403A JP 4812277 A JP4812277 A JP 4812277A JP 4812277 A JP4812277 A JP 4812277A JP S53132403 A JPS53132403 A JP S53132403A
Authority
JP
Japan
Prior art keywords
bit
expanding hole
expanding
hole
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.)
Pending
Application number
JP4812277A
Other languages
Japanese (ja)
Inventor
Kenichi Ichihara
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.)
Tone Boring Co Ltd
Original Assignee
Tone Boring 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 Tone Boring Co Ltd filed Critical Tone Boring Co Ltd
Priority to JP4812277A priority Critical patent/JPS53132403A/en
Publication of JPS53132403A publication Critical patent/JPS53132403A/en
Pending legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP4812277A 1977-04-25 1977-04-25 Bit for expanding hole Pending JPS53132403A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4812277A JPS53132403A (en) 1977-04-25 1977-04-25 Bit for expanding hole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4812277A JPS53132403A (en) 1977-04-25 1977-04-25 Bit for expanding hole

Publications (1)

Publication Number Publication Date
JPS53132403A true JPS53132403A (en) 1978-11-18

Family

ID=12794513

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4812277A Pending JPS53132403A (en) 1977-04-25 1977-04-25 Bit for expanding hole

Country Status (1)

Country Link
JP (1) JPS53132403A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009180030A (en) * 2008-01-31 2009-08-13 Giken Seisakusho Co Ltd Excavation tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009180030A (en) * 2008-01-31 2009-08-13 Giken Seisakusho Co Ltd Excavation tool

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