JPH0457837B2 - - Google Patents

Info

Publication number
JPH0457837B2
JPH0457837B2 JP60066171A JP6617185A JPH0457837B2 JP H0457837 B2 JPH0457837 B2 JP H0457837B2 JP 60066171 A JP60066171 A JP 60066171A JP 6617185 A JP6617185 A JP 6617185A JP H0457837 B2 JPH0457837 B2 JP H0457837B2
Authority
JP
Japan
Prior art keywords
button
bit
tip
blade
shaped
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
JP60066171A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61225488A (ja
Inventor
Yoneo Hiwasa
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 JP6617185A priority Critical patent/JPS61225488A/ja
Publication of JPS61225488A publication Critical patent/JPS61225488A/ja
Publication of JPH0457837B2 publication Critical patent/JPH0457837B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP6617185A 1985-03-29 1985-03-29 ボタンビツト Granted JPS61225488A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6617185A JPS61225488A (ja) 1985-03-29 1985-03-29 ボタンビツト

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6617185A JPS61225488A (ja) 1985-03-29 1985-03-29 ボタンビツト

Publications (2)

Publication Number Publication Date
JPS61225488A JPS61225488A (ja) 1986-10-07
JPH0457837B2 true JPH0457837B2 (enrdf_load_stackoverflow) 1992-09-14

Family

ID=13308131

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6617185A Granted JPS61225488A (ja) 1985-03-29 1985-03-29 ボタンビツト

Country Status (1)

Country Link
JP (1) JPS61225488A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0724472Y2 (ja) * 1989-08-08 1995-06-05 三菱マテリアル株式会社 ボタンビット

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4296825A (en) * 1977-11-25 1981-10-27 Sandvik Aktiebolag Rock drill
US4693933A (en) * 1983-06-06 1987-09-15 Ovonic Synthetic Materials Company, Inc. X-ray dispersive and reflective structures and method of making the structures

Also Published As

Publication number Publication date
JPS61225488A (ja) 1986-10-07

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term