JP2525225Y2 - リングビット - Google Patents

リングビット

Info

Publication number
JP2525225Y2
JP2525225Y2 JP1990043849U JP4384990U JP2525225Y2 JP 2525225 Y2 JP2525225 Y2 JP 2525225Y2 JP 1990043849 U JP1990043849 U JP 1990043849U JP 4384990 U JP4384990 U JP 4384990U JP 2525225 Y2 JP2525225 Y2 JP 2525225Y2
Authority
JP
Japan
Prior art keywords
ring bit
view
tip
chip
slime
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
JP1990043849U
Other languages
English (en)
Japanese (ja)
Other versions
JPH044986U (US06633600-20031014-M00021.png
Inventor
正純 瀬下
善蔵 渡辺
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 JP1990043849U priority Critical patent/JP2525225Y2/ja
Publication of JPH044986U publication Critical patent/JPH044986U/ja
Application granted granted Critical
Publication of JP2525225Y2 publication Critical patent/JP2525225Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP1990043849U 1990-04-24 1990-04-24 リングビット Expired - Lifetime JP2525225Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990043849U JP2525225Y2 (ja) 1990-04-24 1990-04-24 リングビット

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990043849U JP2525225Y2 (ja) 1990-04-24 1990-04-24 リングビット

Publications (2)

Publication Number Publication Date
JPH044986U JPH044986U (US06633600-20031014-M00021.png) 1992-01-17
JP2525225Y2 true JP2525225Y2 (ja) 1997-02-05

Family

ID=31556621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990043849U Expired - Lifetime JP2525225Y2 (ja) 1990-04-24 1990-04-24 リングビット

Country Status (1)

Country Link
JP (1) JP2525225Y2 (US06633600-20031014-M00021.png)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0340956Y2 (US06633600-20031014-M00021.png) * 1987-09-17 1991-08-28

Also Published As

Publication number Publication date
JPH044986U (US06633600-20031014-M00021.png) 1992-01-17

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