JPH03122187U - - Google Patents

Info

Publication number
JPH03122187U
JPH03122187U JP3076290U JP3076290U JPH03122187U JP H03122187 U JPH03122187 U JP H03122187U JP 3076290 U JP3076290 U JP 3076290U JP 3076290 U JP3076290 U JP 3076290U JP H03122187 U JPH03122187 U JP H03122187U
Authority
JP
Japan
Prior art keywords
ring body
ring
tip
bit
double pipe
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
JP3076290U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0732622Y2 (ja
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 filed Critical
Priority to JP1990030762U priority Critical patent/JPH0732622Y2/ja
Publication of JPH03122187U publication Critical patent/JPH03122187U/ja
Application granted granted Critical
Publication of JPH0732622Y2 publication Critical patent/JPH0732622Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Earth Drilling (AREA)
JP1990030762U 1990-03-26 1990-03-26 二重管式掘削工具 Expired - Lifetime JPH0732622Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990030762U JPH0732622Y2 (ja) 1990-03-26 1990-03-26 二重管式掘削工具

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990030762U JPH0732622Y2 (ja) 1990-03-26 1990-03-26 二重管式掘削工具

Publications (2)

Publication Number Publication Date
JPH03122187U true JPH03122187U (de) 1991-12-13
JPH0732622Y2 JPH0732622Y2 (ja) 1995-07-26

Family

ID=31533470

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990030762U Expired - Lifetime JPH0732622Y2 (ja) 1990-03-26 1990-03-26 二重管式掘削工具

Country Status (1)

Country Link
JP (1) JPH0732622Y2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014162709A1 (ja) * 2013-04-01 2014-10-09 株式会社ミヤナガ 鉄筋穿孔ドリル
JP2016121497A (ja) * 2014-12-25 2016-07-07 株式会社大林組 リングビット

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63151592U (de) * 1987-03-19 1988-10-05
JPH01120592U (de) * 1988-02-09 1989-08-15

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63151592U (de) * 1987-03-19 1988-10-05
JPH01120592U (de) * 1988-02-09 1989-08-15

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014162709A1 (ja) * 2013-04-01 2014-10-09 株式会社ミヤナガ 鉄筋穿孔ドリル
JP2016121497A (ja) * 2014-12-25 2016-07-07 株式会社大林組 リングビット

Also Published As

Publication number Publication date
JPH0732622Y2 (ja) 1995-07-26

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term