JPH0133633B2 - - Google Patents
Info
- Publication number
- JPH0133633B2 JPH0133633B2 JP62033931A JP3393187A JPH0133633B2 JP H0133633 B2 JPH0133633 B2 JP H0133633B2 JP 62033931 A JP62033931 A JP 62033931A JP 3393187 A JP3393187 A JP 3393187A JP H0133633 B2 JPH0133633 B2 JP H0133633B2
- Authority
- JP
- Japan
- Prior art keywords
- claw
- shape
- claws
- tip
- drill
- 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
Links
- 210000000078 claw Anatomy 0.000 claims description 44
- 239000000463 material Substances 0.000 description 7
- 238000005242 forging Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3393187A JPS62189293A (ja) | 1987-02-17 | 1987-02-17 | ドリルのヘツド用爪 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3393187A JPS62189293A (ja) | 1987-02-17 | 1987-02-17 | ドリルのヘツド用爪 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62189293A JPS62189293A (ja) | 1987-08-19 |
JPH0133633B2 true JPH0133633B2 (de) | 1989-07-14 |
Family
ID=12400260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3393187A Granted JPS62189293A (ja) | 1987-02-17 | 1987-02-17 | ドリルのヘツド用爪 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62189293A (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0249888A (ja) * | 1988-08-10 | 1990-02-20 | Kazuo Murazaki | 回転式掘削ビット |
JP6628459B1 (ja) * | 2019-05-21 | 2020-01-08 | 金属工具株式会社 | オーガービット |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5254104U (de) * | 1975-10-17 | 1977-04-19 |
-
1987
- 1987-02-17 JP JP3393187A patent/JPS62189293A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS62189293A (ja) | 1987-08-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |