JP2525977Y2 - ロックビット - Google Patents

ロックビット

Info

Publication number
JP2525977Y2
JP2525977Y2 JP1990063861U JP6386190U JP2525977Y2 JP 2525977 Y2 JP2525977 Y2 JP 2525977Y2 JP 1990063861 U JP1990063861 U JP 1990063861U JP 6386190 U JP6386190 U JP 6386190U JP 2525977 Y2 JP2525977 Y2 JP 2525977Y2
Authority
JP
Japan
Prior art keywords
bit
blade body
curved surface
groove
outer peripheral
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 - Fee Related
Application number
JP1990063861U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0450490U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
直義 秋吉
誠二 国武
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.)
Toho Kinzoku Co Ltd
Nishimatsu Construction Co Ltd
Original Assignee
Toho Kinzoku Co Ltd
Nishimatsu Construction 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 Toho Kinzoku Co Ltd, Nishimatsu Construction Co Ltd filed Critical Toho Kinzoku Co Ltd
Priority to JP1990063861U priority Critical patent/JP2525977Y2/ja
Publication of JPH0450490U publication Critical patent/JPH0450490U/ja
Application granted granted Critical
Publication of JP2525977Y2 publication Critical patent/JP2525977Y2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP1990063861U 1990-06-15 1990-06-15 ロックビット Expired - Fee Related JP2525977Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990063861U JP2525977Y2 (ja) 1990-06-15 1990-06-15 ロックビット

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990063861U JP2525977Y2 (ja) 1990-06-15 1990-06-15 ロックビット

Publications (2)

Publication Number Publication Date
JPH0450490U JPH0450490U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-04-28
JP2525977Y2 true JP2525977Y2 (ja) 1997-02-12

Family

ID=31797018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990063861U Expired - Fee Related JP2525977Y2 (ja) 1990-06-15 1990-06-15 ロックビット

Country Status (1)

Country Link
JP (1) JP2525977Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6257791A (ja) * 1985-09-06 1987-03-13 Mitsubishi Electric Corp レ−ザ加工機
JPH0273494U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1988-11-24 1990-06-05

Also Published As

Publication number Publication date
JPH0450490U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-04-28

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250