JPH0732622Y2 - 二重管式掘削工具 - Google Patents

二重管式掘削工具

Info

Publication number
JPH0732622Y2
JPH0732622Y2 JP1990030762U JP3076290U JPH0732622Y2 JP H0732622 Y2 JPH0732622 Y2 JP H0732622Y2 JP 1990030762 U JP1990030762 U JP 1990030762U JP 3076290 U JP3076290 U JP 3076290U JP H0732622 Y2 JPH0732622 Y2 JP H0732622Y2
Authority
JP
Japan
Prior art keywords
bit
ring
double pipe
tip
peripheral surface
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.)
Expired - Lifetime
Application number
JP1990030762U
Other languages
English (en)
Japanese (ja)
Other versions
JPH03122187U (tr
Inventor
猛 林
勝昭 辻本
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.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
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 Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
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

Links

Landscapes

  • 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 JPH03122187U (tr) 1991-12-13
JPH0732622Y2 true 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 (tr)

Families Citing this family (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
JP6550749B2 (ja) * 2014-12-25 2019-07-31 株式会社大林組 リングビット

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH057353Y2 (tr) * 1987-03-19 1993-02-24
JPH01120592U (tr) * 1988-02-09 1989-08-15

Also Published As

Publication number Publication date
JPH03122187U (tr) 1991-12-13

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term